■ -nm./-:. v>a.ta THOMSON RECORDING WATTMETERS GENERAL ELECTRIC CO. SCHENECTADY, N. Y, GojpglitN? COPYRIGHT DEPOSIT. THE LIBRARY OF CONGRESS, Two Copies Receiver OCT 17 '903 Copyright Entry 0-tAr /*)-!% 02 CLASS Cts XXc, No *) o to *+ 3 COPY B. Copyrighted iqoj by General Electric Company GENERAL DATA ON THOMSON RECORDING WATTMETERS GENERAL ELECTRIC CO., SCHENECTADY, N. Y. AUGUST, 1903 NO. 3J97 P < O CO i h u w i o u If shunt held coils are desired for either of these classes of meters, it must be so stated on order. After connections have been made, the meter should be tested to prove the accuracy of the work. If improperly connected, the meter will run slower, on light loads when the coil is in place, instead of faster. A reversal of the leads will correct the error. The meter should now be tested for full load. If it runs within 5% of normal with the magnets in their original position, sufficient wire has been removed. If the meter runs more than 5% slow, remove still more of the wire from the resistance. The whole purpose is to bring the total resistance of the armature circuit to approximately its original value. Having done this, make the electrical connections permanent, and if an internal resistance, seal the envelope. Great care must be exercised to make good electrical joints in the connections. Only resin, dissolved in alcohol, should be used in soldering. Having completed the new armature circuit in a permanent manner, recalibrate the meter to normal full load accuracy by adjusting the permanent magnets. Light load accuracy can be obtained by loosening the wing-nut (B) and moving the adjustable coil toward or away from the armature ; moving the coil toward the armature increases the meter speed, and moving it away diminishes the speed. When the meter has been properly adjusted, the nuts holding the coil in place should be set securely. Note:— When placing orders for adjustable shunt field coils, it is well to order new resistance envelopes, as the old ones are liable to be damaged when resealing. Below is given a table of envelope dimensions, together with the form num- ber which should be used when ordering. Width Length Form No. n» «4" 1 3|" 4J" 2 sr 5i" 3 *r 5T 4 LIGHT LOAD ADJUSTMENT FOR THOMSON SINGLE-PHASE AND HIGH TORQUE INDUCTION METERS The induction meter is provided with a light load adjustment which can be adjusted to correct for variations in local conditions. The device consists of a movable sector located between the poles of an electro-magnet. Standing so that the device is brought directly between the observer and the shaft of the meter, moving the sector toward the right increases the speed at light loads : moving it toward the left causes the meter to run more slowly at light 2.5 loads and also tends to prevent creeping. If the sector is moved too far so as to pass beyond the field of the electro-magnet, its effect will be correspondingly diminished. The movement affects only the light load accuracy of the meter and has no effect upon the full load ; therefore, it is not necessary to recalibrate the meter after making the adjustment. NON-CREEPING DEVICE FOR SINGLE-PHASE INDUCTION AND POLYPHASE METERS Owing to the lightness of the moving element of these meters, there may be a tendency under certain conditions for the disk to creep on no load, even when the light load adjustment is properly set. To counteract this, an iron wire is fastened to the disk adjacent to the hub. This wire should not be moved unless it is found that creeping exists. The wire should then be slightly inclined radially away from the shaft. Care must be exercised in doing this, as too much of a movement will prevent the meter starting at sufficiently light load. Moving the wire toward the shaft will tend to make the meter run faster on light load. On HIGH TORQUE METERS this iron wire is placed around the hub parallel with the disk and may be bent to or from the shaft. The adjustment when properly made will not in any way interfere with the running of the meter, but will absolutely prevent creeping on no-load. JEWELS AND PIVOTS If a new jewel be inserted in a meter, it is advisable to put in a new pivot, as the old one will probably be injured, particularly if the meter has been running with a damaged jewel. Before inserting the new jewel it is well to place a drop of fine watch oil in the cup. When inserting a new jewel it may be found necessary to raise or lower the moving element of the meter. To do this, insert the jewel screw and turn until it clamps tightly against the bushing. Loosen the hexagonal brass check-nut under the meter disk. The desired adjustment can then be made by turning the jewel screw up or down, the bushing referred to moving with it. When the proper point has been reached, the check-nut must be carefully tightened. On all meters now shipped the check-nut is located beneath the meter base, as shown in the accompanying illustration on page 27. To insert a new pivot, loosen the jewel screw until the disk rests upon the magnets where it should be firmly wedged. Then remove the jewel screw entirely from the meter and insert the pivot wrench in its place. Press firmly, thus clamping the pivot in the end of the wrench and unscrew. Replace the pivot by a new one and screw into the shaft. Remove the wedges from the disk and insert the jewel screw. Care must be exercised in this operation that the adjustment of the brushes of Thomson Recording Wattmeters is not altered and that neither the shaft nor disk is sprung. Extensive experiments have determined that the life of the jewel depends upon the relation of the natural period of the jewel spring to the weight of the 36 moving element. To obtain the best jewel life, it necessitates construction having a spring strength suitable to the weight under which it is to operate. Owing to the decrease in the weight of the moving element of the later form of Thomson Recording Wattmeters, we will furnish jewels having a different spring strength from that used in meters having copper disks. As the weight of the moving element varies in the different types of meters, we are prepared to furnish jewels for each type. There are four classes for use with the following meters : H \F=*\ " Single " disk aluminum, " Single " disk copper, " Double ,? disk aluminum and "Double" disk copper. All " Sapphire " jewels, with exception of Catalogue No. 6704, are mounted in fillister head screws, the " Diamond " having hexagonal heads. Jewels of different spring strengths are classified by finishes as given below : For meters with " Single " aluminum disk . . . Nickel " copper " ... Brass • -X4 Kfiy'Ve 5 4,/V s 5 -. 8^ _£ WA^ - m Wh am 10.000 i at S^fMl 4 m@^' ATTtiOU! : :: I :T^ : <£ °*Vf$m a :. No. 6 Xo. 7 No. 8 No. 4 No. 9 No. 5 i 4 No.10 4 No. 1 = 1.111,100 No. 2= 999,900 No. 3=1,000,100 No. 4 = 9,999,500 No. 5= 909,100 No. 6= 99,700 No. 7 = 9,912,100 No. 8 = 9,928,000 No. 9 = 9,918,100 No. 10 = 9,928,300 37 In No. 10 the second pointer is behind its correct position. The total indica- tion is 9,928,300. By carefully following these directions little difficulty will be found in reading the meter even if the pointers become misplaced. CALIBRATION AND NAME-PLATE STAMPING Meters for both secondary and primary circuits will be calibrated and stamped as given in the following table. Meters which are received for repair or recalibration will be returned to customer with the original name-plate except those which are to be converted. Such meters will be stamped in accordance with table given below. If, however, it is necessary and the order so states, special calibration and name-plate stamping will be given. Volts Ordered For Amperes Capacity Volts Calibrated At Volts Stamped 50 to 55 All 55 50-55 .100 to 110 3 to 600 110 100-110 100 to 110 Above 600 110 110 111 to 115 3 to 600 115 111-115 111 to 115 Above 600 As ordered As ordered 116 to 120 3 to 600 120 116-120 116 to 120 Above 600 As ordered As ordered 121 to 130 3 to 600 130 121-130 121 to 130 Above 600 As ordered As ordered 200 to 220 3 to 600 220 200-220 200 to 220 Above 600 220 220 221 to 230 3 to 600 230 221-230 221 to 230 Above 600 As ordered As ordered 231 to 240 3 to 600 240 231-240 231 to 240 Above 600 As ordered As ordered 500 to 550 3 to 600 525 500-550 500 to 550 Above 600 550 550 551 to 600 3 to 600 575 551-600 551 to 600 Above 600 As ordered As ordered 1000 to 1100 All 110 1000-1100 2000 to 2200 All 110 2000-2200 REGISTERS AND CONSTANTS The registers on all Thomson Recording meters manufactured previous to Forms J-2 and D-2, all Single Phase Induction meters, with the exceptions of Forms C-4, High Torque, and Polyphase meters manufactured previous to serial 38 number 475602, were equipped with non-direct reading dials ; i. e.. the readings have to be multiplied by a constant marked on the dial face in order to obtain the correct number of watt-hours registered. With the use of the direct reading pointer registers, meters are direct reading, or require only the use of constant 10 or a multiple of it. The following list gives meters which are literally direct reading and those having dial constants. THOMSON RECORDING AND THOMSON SINGLE-PHASE FORM C-4 AND ROUND PATTERN INDUCTION METERS DIRECT READING 50- 55 Volts, 5 to 75 Amps. inclusive. 100- 110 " 3 to 25 " " 200- 220 " 2-wire, 3 to 15 " " 200- 220 " 3- wire, 3| to 15 " " 500- 550 " 3 to 5 " ti DIAL CONSTANT JO 50- 55 Volts, 100 to 600 Amps. inclusive. 100- 110 " 50 to 300 " " 200- 220 " 2-wire, 25 to 200 " " 200- 220 u 3- wire, 25 to 200 " " 500- 550 " 10 to 75 " i< 1000-1100 " 3 to 25 " " 2000-2200 " 3 to 15 " " DIAL CONSTANT J 00 50- 55 Volts 1200 Amps. 100- 110 " 450 to 3000 " inclusive. 200- 220 " 2-wire, 300 to 1200 " " 200- 220 " 3-wire, 300 " 500- 550 " 100 to 600 " u 1000-1100 ; ' 50 to 300 " it 2000-2200 " 25 to 200 " (t DIAL CONSTANT 1000 100- 110 Volts, 4000 to 10000 Amps, inclusive. 200- 220 " 2-wire, 2000 to 10000 " 500- 550 " 1200 to 6000 " 1000-1100 " 450 to 600 " " 2000-2200 " 300 to 600 " " DIAL CONSTANT J 0000 500- 550 " 8000 to 10000 Amps, inclusive. 39 HIGH TORQUE INDUCTION METERS DIRECT READING 100- 110 Volts, 3 to 25 Amps, inclusive. 200- 220 " 2-wire, 3 to 10 " 200- 220 " 3-wire, 3£ to 1\ " 500- 550 " 3 to 5 " " DIAL CONSTANT JO 100- 110 Volts, 50 to 150 Amps- inclusive. 200- 220 " 2-wire, 15 to 150 " 200- 220 " 3-wire, 15 to 150 " " 500- 550 " 10 to 50 DIAL CONSTANT J 00 500- 550 Volts, 75 to 150 Amps, inclusive. THOMSON POLYPHASE METERS ROUND AND RECTANGULAR PATTERN DIRECT READING 100- 110 Volts, 3 to 5 Amps, inclusive. 200- 220 " 3 " DIAL CONSTANT JO 100- 110 Volts, 10 to 75 Amps, inclusive. 200- 220 " 5 to 25 " 500- 550 " 3 to 15 " 1000-1100 " 3 " 2000-2200 " 3 " DIAL CONSTANT J 00 100- 110 Volts, 100 to 150 Amps, inclusive. 200- 220 " 50 to 150 " 500-550 ." 25 to 150 " 1000-1100 " 10 to 75 " 2000-2200 " 10 to 25 " DIAL CONSTANT J 000 1000-1100 Volts, 100 to 150 Amps, inclusive. 2000-2200 " 50 to 150 " The dial constant is used only in reading meter register. The meter constant (written K) is the same constant which was placed on the dial before the direct reading register was adopted and is equal to the ratio of gearing (written r) multiplied by the dial constant. The disk constant (written k) is used in calibrating the meter and is placed on the meter disk, or on the terminal block, and may be determined for the various classes of meters in the following manner : 2-wire, D.C., or single-phase, A. C? without transformers: k = K 40 3-wire, D.C., or single-phase, A.C. without transformers: >-? Single-phase or polyphase with transformers: k_ R (R = product of current and potential transformer ratios.) Note : Ratio of gears = number of divisions passed over by the first dial pointer per revolution of the worm wheel. CONSTANTS AND RATIO OF GEARS FOR* THOMSON RECORDING WATTMETERS, 3-J200 AMPERES Volts Amps. J,JN,J-1, FN, DN, D-l J-2 D-2 * Constant tCalibrat'g Constant Ratio Gears Dial Constant 50-55 5 i 0.1 0.1 None " 10 i 2 0.2 0.2 " " 15 1 2 0.3 0.3 " it 25 1 2 0.5 0.5 " " 50 1 1.0 0.1 " " 75 o 1.5 1.5 " 11 100- 2 2.0 0.2 10 u 150 3 3.0 0.3 10 " 200 4 4.0 0.4 10 " 300 6 6.0 0.6 10 g " 450 10 10.0 1.0 10 1 u 600 12 12.5 1.25 10 M 1200 24 25.0 0.25 100 100-110 3 i 0.125 0.125 None " 5 i 2 0.2 0.2 u " 10 h 0.4 0.4 M " 15 1 0.6 0.6 " (I 25 1 1.0 1.0 tc " 50 2 2.0 0.2 10 " 75 3 3.0 0.3 10 " 100 4 4.0 0.4 10 " 150 6 6.0 0.6 10 L " 200 8 7.5 0.75 10 * Non-direct reading register. t Direct reading register. Used in calibrating only, terminal board. Marked on disk and 41 CONSTANTS AND RATIO OF GEARS FOR THOMSON RECORDING WATTMETERS, 3-J200 AMPERES — Continued Volts Amps. LJN.J-1, FN, DN, D-l J-2 D-2 * Constant t Calibrat'g Constant Ratio Gears Dial Constant 100-110 300 12 12.5 1.25 10 " 450 20 20.0 0.2 100 " 600 24 25.0 0.25 100 110 1200 48 50.0 0.5 100 200-220 3 \ 0.25 0.25 None 5 § 0.4 0.4 44 10 l 0.75 0.75 11 15 2 1.25 1.25 . u 25 2 2.0 0.2 10 50 4 4.0 0.4 10 75 6 6.0 0.6 10 100 8 7.5 0.75 10 150 12 12.5 1.25 10 200 16 15.0 1.5 10 c J 300 24 25.0 0.25 100 450 36 40.0 0.4 100 600 48 50.0 0.5 100 c ^ 220 1200 96 100.0 1.0 100 500-550 3 1 0.6 0.6 None " 5 1 1.0 1.0 44 " 10 2 2.0 0.2 10 44 15 5 3.0 0.3 10 14 25 5 5.0 0.5 10 44 50 10 100 1.0 10 44 75 15 15.0 1.5 10 44 100 20 20.0 0.2 100 44 150 30 30.0 0.3 100 " 200 40 40.0 0.4 100 ii 300 60 60.0 0.6 100 44 450 100 100.0 1.0 100 44 600 120 125.0 1.25 100 . 550 1200 240 250.0 0.25 1000 * Non-direct reading register. t Direct reading register. Used in calibrating only. Marked on disk and terminal board. 43 CONSTANTS AND RATIO OF GEARS FOR THOMSON RECORDING WATTMETERS, 3-J200 AMPERES — Concluded Volts Amps. J, JN, J-l FN, DX, D-l J-2 D-2 * Constant t Calibrate Constant Ratio Gears Dial Constant r 2U0-220 3i i 4 0.25 0.25 None " n 1 0.6 0.6 " 44 15 2 1.25 1.25 44 c D 44 25 2 2.0 0.2 10 " 50 4 4.0 0.4 10 44 75 6 6.0 0.6 10 " 100 8 7.5 0.75 10 44 150 12 12.5 1.25 10 " 200 16 15.0 1.5 10 " 300 24 25.0 0.25 100 1000-1 KH) 10 3 4.0 0.4 10 44 15 5 6.0 0.6 10 44 25 10 10.0 1.0 10 44 50 20 20.0 0.2 100 44 75 30 30.0 0.3 100 44 100 40 40.0 0.4 100 44 150 60 60.0 0.6 100 44 200 80 75.0 0.75 100 44 300 120 125.0 1.25 100 u 450 150 200.0 0.2 1000 CO 44 600 240 250.0 0.25 1000 2000-2200 10 6 7.5 0.75 10 44 15 10 12.5 1.25 10 " 25 20 20.0 0.2 100 • 4 50 40 40.0 0.4 100 44 75 60 60.0 0.6 100 14 100 80 75.0 0.75 100 44 150 120 125.0 1.25 100 44 200 160 150.0 1.5 100 44 300 240 250.0 0.25 1000 44 450 300 400.0 0.4 1000 44 600 480 500.0 0.5 1000 * Non-direct reading register. t Direct reading register. Used in calibrating only. ;erminal board. 43 Marked on disk and CONSTANTS STATION ARC METERS NON-DIRECT READING REGISTERS DIRECT READING REGISTERS Amps. Volts Constant Calibrating * Constant Ratio Gears Dial Constant 6.6 1750 7 4.0 0.4 10 6.6 2500 10 7.5 0.75 10 6.6 3250 13 7.5 0.75 10 6.6 4000 15 10.0 1.0 10 6.6 5000 20 12.5 1.25 10 6.6 6250 25 15.0 1.5 10 9.6 1750 7 6.0 0.6 10 9.6 2500 10 10.0 1.0 10 9.6 3250 13 12.5 1.25 10 9.6 4000 15 15.0 1.5 10 9.6 5000 20 20.0 0.2 100 9.6 6250 25 25.0 0.25 100 CEILING BOARD ARC METERS 6.6 200 1 1.0 1.0 None 6.6 400 2 2.0 0.2 10 9.6 200 1 1.0 1.0 None 9.6 400 2 2.0 0.2 10 * Marked on meter disk. PORTABLE METERS 3 500-550 1 0.6 0.6 None 15 500-550 5 3.0 0.3 10 25 500-550 5 5.0 0.5 10 50 500-550 10 10.0 1.0 10 *RAILW/ lY METERS 25 500-550 5 50 500-550 10 100 500-550 20 200 500-550 40 k Cyclometer registers. 44 CONSTANTS FOR HIGH CAPACITY G-2 DIRECT CURRENT ASTATIC WATTMETERS NON-DIRECT READING REGISTERS DIRECT READING REGISTERS Volts Amps. Constant Calibrating * Constant Ratio Gears Dial Constant r 110 2500 125 125 1.25 100 ;t • 4000 200 200 0.2 1000 44 5000 250 250 0.25 1000 " 6500 300 300 0.3 1000 " 8000 400 400 0.4 1000 11 10000 500 500 0.5 1000 220 2500 250 250 0.25 1000 c j " 4000 400 400 0.4 1000 t. " 5000 500 500 0.5 1000 £ " 6500 600 600 0.6 1000 c ^ " 8000 800 750 0.75 1000 " 10000 1000 1000 1.0 1000 550 2500 500 500 0.5 1000 " 4000 800 750 0.75 1000 ii 5000 1000 1000 1.0 1000 " 6500 1300 1250 1.25 1000 " 8000 1600 1500 1.5 1000 ^ E| 10000 2000 2000 0.2 10000 * Marked on meter disk. 45 CONSTANTS FOR HIGH CAPACITY GG-4 DIRECT CURRENT ASTATIC WATTMETERS Volts Amps. DIRECT READING REGISTERS Calibrating * Constant Ratio of Gears Dial Constant 110 2000 100 1.0 100 " 3000 150 1.5 100 " 4000 200 0.2 1000 " 6000 300 0.3 1000 " 8000 400 0.4 1000 <( 10000 500 0.5 1000 220 2000 200 0.2 1000 " 3000 300 0.3 1000 " 4000 400 0.4 1000 " 6000 600 0.6 1000 <( 8000 750 0.75 1000 tt 10000 1000 1.0 1000 550 2000 500 0.5 1000 " 3000 750 0.75 1000 " 4000 1000 1.0 1000 u 6000 1500 1.5 1000 " 8000 2000 0.2 10000 (( 10000 2500 0.25 10000 * Marked on meter disk. 46, CONSTANTS AND RATIO OF GEARS FOR THOMSON SINGLE -PHASE (FORM C-4) AND ROUND PATTERN INDUCTION METERS NON-DIRECT READING REGISTERS DIRECT READING REGISTERS Volts Amps. Constant Calibrating * Constant Ratio of Gears Dial Constant . 100-110 3 i 0.2 0.2 None 5 I 0.25 0.25 " 10 i 2 0.5 0.5 " " 15 1 0.6 0.6 11 " 25 1 1.0 1.0 " " 50 2 2.0 0.2 10 " 75 3 3.0 0.3 10 " 100 4 4.0 0.4 10 44 150 6 6.0 0.6 10 200-220 3 i 4 0.25 0.25 None c -55 it M 55 3 5 10 15 15 25 50 75 100 150 200 300 450 600 1200 JJ-1J-2 D,D-l,D-2 8 260 it it .005 sec .11 120 100-110 3 JN-J-lor2 8 1000 .003 SSC 4 1180 " 5 tt " 900 " 10 1050 11 5 " 1000 " 4 1180 " 10 J-l or 2 u " " " " " 15 u " " " " " " 15 DN-FN-D-lor2 " '* " " " g " 25 " " " " M M 5 n 50 75 u " « « 41 c^ n 110 100 150 200 300 450 600 1200 « » u 1 l 200-220 3 JN-J-lor2 16 500 .003 SSC i 1180 " 5 " " u " " " n 10 " " 1 " ii " 11 15 " " 1 " ii " " 15 DN-FN-D-lor2 it 1 11 " " " 25 " " ' ii " 11 " 50 it " ' " m " " 75 " " ' " u " " 100 " " 1 ii " " (1 150 " " ' " " " u 200 " " " »* " " 300 " " 1 " it " fl 450 " " ' " M " It 600 " " 4 " " kt ^ 220 1200 it 55 ARMATURE DATA FORMS JEN-J3-D3-DEN, J-J, D-J, J-2, D-2 METERS Volts Amps. Form No. Coils Turns Wire Label Res. 500-550 3 5 10 JEN-J-lor2 1 6 500 .003SSC 1 1180 1 « ii « « « ' 15 " " " " it " 15 DEN-D-1 or 2 " " it " 4 25 " " " ii " H ' 50 it " " u " £ c^ £ 75 it it " " " ' 100 " " " " " ' 150 " " u u " ' 200 " " " '* " ' 300 " " " ii " 1 450 " " ii " " u 600 " " " " " - 550 1200 " " ii u r 200-220 3i J3-J-1 or 2 $ 1000 .003 SSC 4 1180 " n ti • 650 .004 SSC 2 425 " n 1000 .003 SSC 4 1180 " 10 J-l or 2 " " " " CD " 15 D3-T-1 or 2 D3-D-1 or 2 " " " kt 1 il 25 50 « " " " CO 11 (( 75 100 150 200 ci » 1 " it 1 300 (i ARMATURE DATA ON ARC CIRCUIT METERS Volts Amps. Type No. Coils Turns Wire Label Ohms 1750 6.6 Station 16 300 .005 SSC 8 280 2500 " " " " " 3250 " " " " '* 4000 " " " " " 5000 " " " " ** 6250 ii " " " " 1750 9.6 " '* " " 2500 " " " " 3250 " ii " u " 4000 " " " " " 5000 " " " " " 6250 " " " " " 200 6.6 Ceiling- board " " " .005 SCC 400 " " " " " 200 9.6 " " '* " 400 56 ARMATURE DATA FOR HIGH CAPACITY G-2 DIRECT CURRENT ASTATIC WATTMETERS Volts Amps. No. Coils Turns per Coil Wire Label Total Res. 110 220 550 500 .005 SSC 12 375 " 14 750 500 .004 SSC .005 SSC 13 12 480 360 1100 4S0 750 .004 SSC 13 1100 500 .005 SSC it it 12 u 480 This data applies to each armature except the resistance which is the total for both. ARMATURE DATA FOR PRIMARY METERS HIGH EFFICIENCY Volts Amps. Form No. Coils Turns per coil Wire Label T ^ 1100-2200 10 15 25 50 75 100 150 200 300 450 600 J-l or 2 D-l or 2 1000 .003 SSC 1180 57 w n < H Q < Q a 1-1 o S 5-H o !■— > " " Q 3 s = v = - 3 C/5 en a o - o Crt CD en Crt l/J C/3 C/5 a a s a a - £ J3 ^3 rC X O. O ~* t- JO CO S o to 1— 1 3 In 3 3 3 3 Q - - - W k- 3 - en CD a O JO = 3 3 3 3 3 S S3 85 ohms .75 ohms 75 ohms 95 ohms OS 0£ 8 - *. = 3 3 2 3 3 3 iO - 3 ©33 © (A J-i S3 o r- 1 3 * 3 3 3 3 8, - 04 © JO JO © 3 © t- t' JO JO CO o i - * * © r-l "•*tilLV. O 1 58 w PS < -cfl O Q < Q c 7 s o ft o* 55~ t— > S o ft s = Z W 3 Q 3SM ^33^3 3 3 3 cfl cfl s 43 - O " IQ 03 3 3 Cfl e - o " © IGO ohms 80 ohms 135 ohms Cfl s © 1 3* * - = 5 s = *" 3 3 S cfl C u H *■ - - ... » © ©„©„,. 3 3© a Z O ~ Z CO CO tO 3 3 8 •stfuiy »o o CN O lO o t> o tH © © © lO o o H 1^ CO ©©©coio©ioio© lO © © iH ~4 CN uO . O *--~------ en £ o . 3 oo-----r-'"- H £ tH Y o ^' Q Crt trt CO M - *H s s s Q 0) T3 Pi §58 x C Tj< ^ ^ 5 a - < lH C/3£ 3:.::,*;., , CO |8§ EJ H 1-H i-l tH P a o CO w ^ Q 3 3 ..3 3 - 3 S en en > w . £ £ Pi CD »4.ti.. ..«....<... < fc ^ o o o o O H C<1 i-l s 8 8, - = - - - - H h ■ g m co~ * * * en Ot^33,-333 2 CD -IN W|N •sduiy CO t> LO lO © K3 O © C O i-l CN LO t- © lO O © H H (N M o o © CJ C/) 73 (/) s;ioa 8*" * * * V. -WTT „ n j 61 SHUNT COIL DATA FOR HIGH CAPACITY G-2 DIRECT CURRENT ASTATIC WATTMETERS Volts Amps. Turns per Coil Wire Total Res. 110 2500 500 .005 SSC 280 " 4000 650 .004 SSC 570 " 5000 750 " 660 " 6500 750 11 660 " 8000 750 " 660 " 10000 750 " 660 220 2500 500 .005 SSC 280 " 4000 800 .004 SSC 700 " 5000 800 " 700 " 6500 1000 .003 SSC 880 u 8000 800 .004 SSC 700 " 10000 800 it 700 550 2500 500 .005 SSC 280 " 4000 800 .004 SSC 700 " 5000 800 " 700 u 6500 1000 .003 SSC 880 a 8000 800 .004 SSC 700 " 10000 800 " 700 These meters are supplied with two shunt field coils. Data as given applies to each coil with exception of resistance which is total for both. 62 CARD OR TUBE RESISTANCE THOMSON RECORDING WATTMETERS Volts Amps. Form Resistance Ohms Form Resistance Ohms 50-55 3 J, J-l J-2 1 5 " 287 it 240 4 10 11 287 " 240 1 15 " 222 " 240 1 25 D, D-l 187 D-2 240 ' 50 " 187 " 240 ' 75 " 177 11 240 ' 100 " 177 " 240 1 150 " 177 " 240 4 200 " 202 " 240 1 300 11 247 " 240 ' 450 " 247 " 240 " 600 " 247 11 240 100-110 3 5 10 J-l 1080 1220 980 J-2 1000 1000 1000 a " 15 " 1030 " 1000 5 25 D-l 730 D-2 1000 i " 50 75 100 150 200 300 450 600 n 730 730 730 730 730 730 730 730 " 1000 1000 1000 1000 1000 1000 1000 1000 110 1200 " 1380 tl 1000 200-220 3 5 10 15 J-l 2830 2580 2630 2430 J-2 3340 3340 3340 3340 " 25 D-l 2630 D-2 3340 11 50 " 2630 " 3340 u 75 " 2630 " 3340 " 100 " 2630 " 3340 63 CARD OR TUBE RESISTANCE THOMSON RECORDING WATTMETERS Volts Amps. Form Resistance Ohms Form Resistance Ohms 200-220 150 200 300 450 600 D-l 2630 2630 2630 2630 2630 D-2 3340 3340 3340 3340 3340 220 1200 4080 " 3340 500-550 3 J-l 9460 J-2 10460 5 9460 t< 10460 2 10 9460 " 10460 is 1 15 9460 " 10460 25 D-l 9460 D-2 10460 50 9460 " 10460 75 9460 11 10460 100 9460 " 10460 150 9460 " 10460 200 9460 " 10460 300 9460 " 10460 450 9460 " 10460 600 9460 " 10460 I 550 1200 11180 " 10460 r 200-220 3^ J-l 1080 J-2 1000 74 1550 " 1000 15 D-l 730 D-2 1000 25 730 11 1000 .£ 50 730 " 1000 75 730 u 1000 100 730 11 1000 150 730 " 1000 200 730 " 1000 L 300 730 1000 64 TOTAL RESISTANCE AND WATT LOSS POTENTIAL CIRCUIT THOMSON RECORDING WATTMETERS > CO Q. £ < s p 0) u C a to CO o a u o 0) o C to £ ■s»S co co O cd f 50-55 3 J-J-a J-2 5 u 557 5.45 510 5.94 10 " 557 5.45 510 5.94 15 11 479 6.31 510 5.94 25 D-D-l 432 6.98 D-2 510 5.94 50 " 432 6.98 510 594 75 " 422 7.12 510 5.94 100 (« 422 7.12 510 5.94 150 a 422 7.12 510 5.94 200 t< 447 6.8 510 5.94 300 " 492 6.14 510 5.94 450 << 492 6.14 510 5.94 600 " 492 6.14 510 5.94 100-110 3 J-l 2540 4.58 J-2 2500 4.84 i j 5 " 2590 4.67 2500 4.84 $ 10 " 2440 4.96 2500 4.84 15 " 2610 4.64 2500 4.84 c 25 50 75 100 D-l a it it 2310 2310 2230 2230 5.25 5.25 5.43 5.43 D-2 2500 2500 2500 2500 4.84 4.84 4.84 4.84 150 it 2230 5.43 2500 4.84 200 it 2230 5.43 2500 4.84 300 " 2230 5.43 2500 4.84 450 " 2230 5.43 2500 4.84 600 " 2230 5.43 2500 4.84 110 1200 " 2880 4.2 2500 4.84 200-220 3 J-l 4990 9.7 J-2 5000 9.68 (< 5 a 4240 11.40 a 5000 9.68 (< 10 (( 4790 10.1 " 5000 9.68 . 15 4590 10.52 (< 5000 9.68 65 TOTAL RESISTANCE AND WATT LOSS POTENTIAL CIRCUIT THOMSON RECORDING WATTMETERS 8 CO in O o 'o > «5 ft s < a u o to to w •*-> $ a to «g s 6 S S-i O ft c 33 c/2 B u o j3 "So c £ in a u O C in r 50-55 3 2 J J-l J-2 400 << 5 2 J J-l 470 J-2 400 " 10 2 J 640 J-l 630 J-2 380 " 15 2 J 630 J-l 630 J-2 400 " 15 3 F 630 645 D-2 645 " 25 3 F 630 D-l 645 D-2 615 " 50 3 F 820 D-l 825 D-2 660 (C 75 3 F 860 D-l 795 D-2 660 " 100 3 F 600 D-l 615 D-2 615 u 150 3 F 900 D-i 615 D-2 660 tt 200 3 D 680 D-l 690 D-2 615 11 300 3 D 860 D-l 855 D-2 690 n < 13 P 6 z a u c "5) c £ u o to bo c £ o to ill 200-220 15 3 FN 900 J-l 900 D-2 1050 a 25 3 FN 810 D-l 795 D-2 975 ii 50 3 FN 870 D-l 915 D-2 1035 CI 75 3 FN 690 D-l 705 D-2 1035 " 100 3 FN 650 D-l 660 D-2 900 (C 150 3 FN 940 D-l 945 D-2 1080 [{ 200 3 DX 600 D-l 630 D-2 960 " 300 3 DX 930 D-l 960 D-2 1080 " 450 3 DX 750 D-l 735 D-2 1090 " 600 3 DX 960 D-l 975 D-2 1095 220 1200 3 EEX 1020 D-l 990 D-2 990 c ; 500-550 3 2 JN 540 J-l 610 J-2 590 1 " 5 2 JN J-l 470 J-2 620 ii 10 2 JN 630 J-l 640 J-2 590 e- " 15 2 JN 610 J-l 620 J-2 620 " 15 3 FN 900 D-l 900 D-2 1005 M 25 3 FN 680 D-l 645 D-2 975 " 50 3 FX 900 D-l 915 D-2 945 II 75 3 FN 945 D-l 615 D-2 1035 " 100 3 FN 540 D-l 525 D-2 960 II 150 3 FN 900 D-l 885 D-2 1035 " 200 3 DX 610 D-l 645 D-2 1020 " 300 3 DX 900 D-l 915 D-2 1035 " 450 3 DX 750 D-l 735 D-2 1095 IC 600 3 DX 960 D-l 915 D-2 1035 L 550 1200 3 EEX 980 D-l 1005 D-2 990 200-220 H 2 J-3 J-l 470 J-2 560 " n 2 J-3 590 J-l 680 J-2 590 " 15 2 J-3 590 J-l 945 J-2 650 n 15 3 D-3 670 D-l 945 D-2 1050 K it 25 3 D-3 810 D-l 720 D-2 975 g " 50 3 D-3 980 D-l 945 D-2 1035 c^ " 75 3 D-3 720 D-l 720 D-2 1035 " 100 3 D-3 660 D-l 630 D-2 900 ii 150 3 D-3 940 D-l 945 D-2 1080 200 3 D-l 690 D-2 960 l cc 300 3 D-l 885 D-2 j 1080 69 MAGNET STRENGTHS FOR THOMSON RECORDING WATTMETERS-Concltided tn 'o > a <- 8 P 6 a U o be G $ a u o "So G in a u o ! a bo G H tn f 1000-1100 10 2 *J 360 *J-1 330 J-i 265 J -2 590 " 15 3 *J 900 *J-1 1000 D-l 900 D-2 1005 " 25 3 * F 780 *D-1 720 D-l 720 D-2 975 " 50 3 * F 920 *D-1 930 D-l 930 D-2 1035 u 75 3 * F 690 *D-1 710 D-l 720 D-2 1035 u 100 3 *F 660 *D-1 670 D-l 735 D-2 960 " 150 3 *F 950 *D-1 950 D-l 960 D-2 1035 " 200 3 *D 820 *D-1 800 D-l 830 D-2 960 u 300 3 *D 860 *D-1 870 D-l 990 D-2 1080 " 450 3 *D 550 *D-1 650 D-l 550 D-2 1095 " 600 3 *D 840 *D-1 840 D-l 1005 D-2 1035 2000-2200 10 2 *J 360 *j_! 330 J-l 265 J -2 590 " 15 3 *J 900 *J-1 1000 D-l 950 D-2 1005 " 25 * F 780 *D-1 720 D-l 720 D-2 975 " 50 3 * F 920 *D-1 930 D-l 930 D-2 1035 " 75 3 *F 690 *D-1 710 D-l 720 D-2 1035 " 100 3 * F 660 *D-1 670 D-l 735 D-2 960 " 150 3 *F 950 *D-1 950 D-l 960 D-2 1035 " 200 3 *D 820 *D-1 800 D-l 830 D-2 960 " 300 3 *D 860 *D-1 870 D-l 990 D-2 1080 " 450 3 *D 550 *D-1 650 D-l 550 D-2 1095 " 600 3 *D 840 *D-1 840 D-l 1005 D-2 1035 *Low eff., J or J-l, D or D-l. MAGNET STRENGTHS FOR RAILWAY METERS Volts Amps. No. Used Direct and Non-direct Reading 500-550 25 2 630 630 500-550 50 2 u t< 500-550 100 2 " w 500-550 200 2 660 660 70 MAGNET STRENGTHS HIGH CAPACITY G-2 DIRECT CURRENT WATTMETERS Amps. No. Used 110 Volts 220 Volts 550 Volts 2500 4 1380 1380 1380 4000 4 1380 1380 1380 5000 4 1380 1380 1380 6500 4 1380 1380 1380 8000 4 1380 1380 1380 10000 4 1380 1380 1380 MAGNET STRENGTHS HIGH CAPACITY GG-4 DIRECT CURRENT ASTATIC WATTMETERS Amps. No. Used 110 Volts 220 Volts 550 Volts 2000 4 1380 1380 1380 3000 4 1380 1380 1380 4000 4 1380 1380 1380 6000 4 1380 1380 1380 8000 6 2070 1950 2070 10000 6 2070 2070 2070 MAGNET STRENGTHS FOR THOMSON SINGLE-PHASE FORM C-4 AND ROUND PATTERN INDUCTION METERS Volts Amps. No. Used 60 to 125 Cycles f 100-110 3 125 1 5 90 1 10 140 E 1 15 125 & 1 25 100 1 « 50 75 120 125 " 100 95 ^ 150 105 71 MAGNET STRENGTHS FOR THOMSON SINGLE-PHASE FORM C-4 AND ROUND PATTERN INDUC- TION METERS— Concluded Volts Amps. No. Used 60 to 125 Cycles f 200-220 3 5 10 80 90 140 2 '" 15 125 it 25 100 " 50 120 (C 75 125 (I 100 95 ' „ l( 150 105 \ 200-220 u 3£ n 15 95 110 125 a " 25 100 is u 50 120 CO 1 (( 75 100 125 95 1 I t( 150 105 r 1000-1100 * 3 85 " 5 85 it u 10 15 25 50 75 100 125 135 140 140 140 140 .§ (( 150 140 K C 1 2000-2200 3 5 10 15 25 50 75 100 85 85 125 135 140 140 140 140 L " 150 140 73 MAGNET STRENGTHS FOR HIGH TORQUE INDUCTION METERS Volts Amps. No. Used 50-59 Cycles 60 to 125 Cycles r 100-110 3 2 430 520 (f 5 2 430 520 14 10 2 430 500 44 15 2 450 540 44 25 2 420 500 41 50 2 460 560 " 75 2 430 520 44 100 2 260 310 ( ; 44 150 2 400 480 % c l 200-220 3 2 430 520 44 5 2 430 520 44 10 2 430 500 It 15 2 450 540 - 44 25 2 420 500 (I 50 2 460 560 44 75 2 430 520 44 100 2 260 310 I 44 150 2 400 480 r 200-220 3^ 2 420 540 u n 2 400 480 1 i u 15 2 400 480 (C 25 2 480 570 CO I " 50 2 360 380 II 75 2 480 570 73 MAGNET STRENGTHS FOR POLYPHASE METERS RECTANGULAR PATTERN Volts Amps. No. Used 40-50 Cycles 60 Cycles 100-110 3 2 340 475 " . 5 2 340 475 " 10 2 350 500 11 15 2 • 300 450 " 25 2 270 400 11 50 2 270 290 u 75 2 380 525 C( 100 2 280 425 " 150 2 360 550 200-220 3 2 340 475 " 5 2 340 475 " 10 2 350 500 11 15 2 300 450 " 25 2 270 400 " 50 2 270 290 u 75 2 380 525 " 100 2 280 425 it 150 2 360 550 500-550 3 2 340 475 " 5 2 340 475 " 10 2 350 500 " 15 2 300 450 " 25 ' 2 270 400 " 50 2 270 290 u 75 2 380 525 " 100 2 280 425 tc 150 2 360 550 74 MAGNET STRENGTHS FOR POLYPHASE METERS ROUND PATTERN Volts Amps. No. Used 25 Cycles 40 Cycles 60 Cycles 1000-1100 3 2 190 340 400 10 2 210 380 450 15 2 190 340 400 25 2 230 410 480 50 2 210 380 450 75 2 240 430 500 100 2 210 380 450 150 2 240 430 500 2000-2200 3 2 240 430 500 10 2 210 380 450 15 2 190 340 400 25 2 230 410 480 50 2 210 380 450 75 2 240 430 500 100 2 210 380 450 150 2 240 430 500 75 LAMP AND HJ>. RATINGS DIRECT CURRENT AND SINGLE-PHASE METERS CAPACITY NUMBER OF 50 WATT INCANDESCENT HORSE-POWER OF METER LAMPS PER METER OF MOTORS Amps. 2-Wire 50-55 Volts 2-Wire 100-110 Volts 3-Wire ' 200-220 Volts 2-Wire 200-220 Volts 2-Wire 200-220 Voits 2-Wire 500-550 Volts 3 3 6 12 1 U H 15 5 5 10 20 n n n 30 10 10 20 40 40 n 5 15 15 30 60 60 h n 25 25 50 100 100 7 15 50 50 100 200 . 200 15 30 75 75 150 300 300 20 50 100 100 200 400 400 25 60 150 150 300 600 600 40 100 200 200 400 800 800 50 120 300 300 600 1200 1200 80 200 450 450 900 1800 1800 125 300 600 600 ' 1200 2400 2400 160 400 800 800 1600 3200 3200 200 480 1200 1200 2400 4800 4800 320 800 1500 1500 3000 6000 400 1000 2000 2000 4000 8000 500 1200 2500 2500 5000 10000 700 1600 3000 3000 6000 12000 800 2000 4000 4000 8000 16000 1000 2400 5000 5000 10000 20000 1400 3200 6000 6000 12000 24000 1600 4000 6500 6500 13000 28000 1725 4500 8000 8000 16000 32000 2200 5400 10000 10000 20000 40000 2800 6400 76 KILOWATT AND H*P, RATINGS THOMSON POLYPHASE METERS FOR 3-WIRE 3-PHASE, 3 AND 4-WIRE 2-PHASE, AND MONOCYCLIC CIRCUITS JOO-UO VOLTS KW. CAPACITY H. P. CAPACITY Capacity NON-INDUCTIVE LOADS MOTORS Amperes 2- and 3-phase Monocyclic 2- and 3-phase and Monocyclic 3 h i 4 1 5 1 £ 1 10 2 l 2 15 3 H 3 25 5 3 5 50 10 5 10 75 15 8 15 100 20 10 20 150 30 15 30 200-220 VOLTS 3 1 i 1 5 2 1 2 10 4 2 3 15 6 3 5 25 10 5 10 50 20 10 20 75 30 15 30 100 40 20 40 150 60 30 60 500-550 VOLTS 3 3 H 3 5 5 3 5 10 10 5 10 15 15 8 15 25 25 12 25 50 50 25 50 75 75 40 75 100 100 50 100 150 150 »o 150 To measure output of generators, use Kw. capacity as given above. For circuits in excess of 150 amperes, current transformers are required ; two for each meter. For circuits above 650 volts, both current and potential transformers are necessary. 77 KILOWATT AND HJP, RATINGS THOMSON POLYPHASE METERS FOR 3-WIRE 3-PHASE, 3 AND 4-WIRE 2-PHASE, AND MONOCYCLIC CIRCUITS — Concluded JOOO-UOO VOLTS KW. CAPACITY H. P. CAPACITY Capacity NON-INDUCTIVE LOADS MOTORS Amperes 2- and 3-phase Monocyclic 2- and 3-phase and Monocyclic 3 6 3 6 10 20 10 20 15 30 15 30 25 50 25 50 50 100 50 100 75 150 75 150 100 200 100 200 150 300 150 300 2000-2200 VOLTS 3 12 6 12 10 40 20 40 15 60 30 60 25 100 50 100 50 200 100 200 75 300 150 300 100 400 200 400 150 600 300 600 To measure output of generators, use Kw. capacity as given above. For circuits in excess of 150 amperes, current transformers are required; two for each meter. For circuits above 650 volts, both current and potential transformers are necessary. 78 CURRENT STUDS AND NUTS FOR INDUCTION, POLYPHASE AND THOMSON RECORDING WATTMETERS STUDS CONTACT NUTS CLAMPING NUTS 03 P. s < u s * c 3 S-c C/5 If) s ■a 12 H 3 a; T3 CU P 6 on CO e p* H T3 a o bi E be s 9-4 o 9 Oh 1. c« bo 50-55 3 J-l or 2 104 J-l or 2 i 114 131 5 u i " 10 " i " 15 II D-l or 2 2 " 25 D-l or 2 105 2 11 50 ii 2 " 75 106 1 115 100 107 1 " 4 150 " 1 u 200 108 2 11 300 " 2 " 450 109 1 116 600 110 2 " 55 1200 111 1 117 100-110 3 J-l or 2 104 J-l or 2 1 114 131 14 II II II II 110 5 10 15 25 50 75 100 150 200 300 450 600 1200 D-l or 2 u 105 106 107 108 (t 109 110 111 D-l or 2 1 1 2 2 2 1 1 1 2 2 1 2 1 115 i< it 116 117 200-220 u 3 5 10 15 J-l or 2 it it 104 ti ci J-l or 2 D-l or 2 1 1 1 2 114 ii 131 i 25 D-l or 2 105 <( 2 84 DIMENSIONS OF THOMSON RECORDING WATTMETERS— Continued ft s < FRONT CONNECTED BACK CONNECTED O > 2 u O fcJD 9 p-. s u o 0) bo 1. 'en &D 200-220 50 D-l or 2 105 D-l or 2 2 114 131 75 106 1 115 " 100 107 1 " " 150 t< 1 EC " 200 108 2 tl 11 300 it 2 " " 450 109 1 116 " 600 110 2 " 11 220 1200 111 1 117 k 500- -600 3 5 10 J-l or 2 2 2 2 104 J-l or 2 1 1 1 114 it n 131 C[5 < 15 25 50 75 100 150 200 300 450 600 D-l or 2 2 2 2 2 2 2 105 <( 106 107 108 109 110 D-l or 2 2 2 2 1 1 1 2 2 1 2 (i 115 u 116 II M [ 550 1200 111 1 117 " 200-220 3§ J-l or 2 112 J-l or 2 1 118 131 H " 1 " ". 10 " 2 " " 15 D-l or 2 2 11 D-l or 2 2 11 " QJ 25 o " 2 u " > 50 2 u 2 " ii cc 75 100 150 200 2 1 1 2 113 1 1 1 2 119 (i a 131 300 2 (C 2 u 85 DIMENSIONS PRIMARY METERS Amps. 1000-1100 VOLTS BACK CONNECTED 2000-2200 volts, BACK CONNECTED Form Fig. Page Resist.— Page Form Fig. Page Resist.— Page 10 J-l or 2 1 114 131 J-l or 2 1 114 131 15 D-l or 2 2 " D-l or 2 2 " 25 2 " 2 " 50 2 " 2 " 75 1 115 1 115 100 1 " 1 " 150 1 3 DIMENSIONS OF FRONT CONNECTED TWO-WIRE f ♦ R, WATTMETERS 200 TO 450 AMPS.— 50-600 VOLTS FORMS DE AND DEN Fjgl. Fi^2. Amps. Volts Form Fig. 200-300 450 50-600 50-600 DE-DEN DE-DEN 1 2 indicates space necessary to remove cover. Form DE, 50 volts only. 94 DIMENSIONS OF FRONT CONNECTED TWO -WIRE j T. R, WATTMETERS 600-J200 AMPS,, 50-600 VOLTS FORMS DE, DEN, EE AND EEN LHpi . ' ^ — J Amps. ! Volts Form Fig. Amps. Volts Form Fig. 600 1 50-600 DE-DEX 1 1200 50-600 EE-EEX 2 ♦Indicates space necessary to remove cover. Forms DE and EE, 50 volts only. 95 DIMENSIONS OF BACK CONNECTED TWO-WIRE T. R. WATTMETERS 5-50 AMPS., 50-600 VOLTS FORMS RJ, RJN, RD AND RDN T7 _ r.i'i..i '■ • ■■ i \C 7i'-.-4l r . — iatud I— — m J_L , 2 FJ! * '7~T £ L. iei 5S* 'IT" -ft I I af 1 I I oft" -J 4-i— J i' -5- -si <£— I. Amps. Volts Form Figs. 3-15 25-50 50-600 50-600 RJ, RJN RD, RDN 1 2 * Indicates space necessary to remove cover. Forms RJ and RD, 50 volts only. 96 DIMENSIONS OF BACK CONNECTED TWO -WIRE T. R. WATTMETERS 75 TO 300 AMPS. 50-600 VOLTS FORMS RD AND RDN .1 ,11. -,o,|' 1 ||£^__ -_e£_. Fig,2. Wm TT I I Ms* jtfctote I- S||' , _ & L I ' ty -jJ-JLl— I I II- S£" II U 10,#" J T i_ Ik*-^- Amps. Volts Form Fig. 75-150 200-300 50-600 50-GOO RD, RDN 1 RD, RDN 2 ♦Indicates space necessary to remove cover. Form RD, 50 volts only. 97 DIMENSIONS OF BACK CONNECTED TWO -WIRE T. R, WATTMETERS 450 TO 600 AMPS. 50-600 VOLTS FORMS RD AND RDN Pig.1. Fi^e. Amps. Volts Form Fig. 450 600 50-600 50-600 RD, RDN RD, RDN 1 2 * Indicates space necessary to remove cover. Form RD, 50 volts only. 98 DIMENSIONS OF BACK CONNECTED TWO -WIRE T. R. WATTMETERS 1200 AMPS. 50-600 VOLTS FORMS REE AND REEN ill L 1 1- ai A i I eg- Amps. Volts Form Fig. 1200 50-600 REE, REEN * Indicates space necessary to remove cover. Form REE, 50 volts only. Lore. 99 DIMENSIONS OF FRONT CONNECTED THREE-WIRE T, R, WATTMETERS 3|-75 AMPS., 200-220 VOLTS FORMS J-3 AND D-3 TT Amps. Volts Form Fig. 15-75 200-220 200-220 J-3 D-3 1 2 * Indicates space necessary to remove cover. 100 DIMENSIONS OF FRONT CONNECTED THREE -WIRE T. R* WATTMETERS J 00-150 AMPS. 200-220 VOLTS FORM D-3 ue«? Amps. Volts Form Fig. 100-150 200-220 D-3 1 * Indicates space necessary to remove cover. 101 DIMENSIONS OF BACK CONNECTED THREE-WIRE T. R. WATTMETERS Sh-75 AMPS. 200-220 VOLTS FORMS RJ-3 AND RD-3 m r ~^ r si Fja.1- Fig2 L qL" Amps. Volts Form Fig. 15-75 200-220 200-220 RJ-3 RD-3 1 2 * Indicates space necessary to remove cover. 103 DIMENSIONS OF BACK CONNECTED THREE-WIRE T. R- WATTMETERS J 00- J 50 AMPS, 200-220 VOLTS FORM RD-3 rig. I. Sdok zSbyd] : I r*~ I — o= — I l-g -io|" A Amps. Volts Form Fig. 100-150 200-220 RD-3 1 ^Indicates space necessary to remove cover. 103 DIMENSIONS OF FRONT CONNECTED TWO -WIRE T. R- WATTMETERS 3 TO J5 AMPS, 50-600 VOLTS FORMS J-J AND J-2 -t~-H rr.. 1 7&** Fi£.l l|tioie_^ f%HM#i Fi<££ ^nlFf^flff 1 " H?u-3^£^l f— 3j|-< 6 "' 13" o'-5_ . Amps. Volts Form Fig. Amps. Volts Form Fig. 3-15 50-220 J-l or 2 1 3-15 500-600 J-l or 2 2 *If used with Current Transformers the leads marked "a" are for the Potential Circuit. ** Indicates space necessary to remove cover. 104 DIMENSIONS OF FRONT CONNECTED TWO -WIRE T t R, WATTMETERS 25-50 AMPS. 50 TO 600 VOLTS FORMS D J AND D-2 Amps. Volts Form Fig. 25-50 *25-50 25-50 50-220 50-600 50-600 D-l or 2 * <; it 1 1 2 * Special Finish— 500-volt Meter has separate resistance. ** Indicates space necessary to remove cover. 105 DIMENSIONS OF FRONT CONNECTED TWO -WIRE T. R* WATTMETERS 75 AMPS. 50 TO 600 VOLTS FORMS D-J AND D-2 Tifc r\%z Amps. Volts Form Fig. 75 75 *75 50-220 550-600 50-600 D-l or 2 1 2 1 *Special Finish— 550-600 volt Meter has separate resistance. **Indicates space necessary to remove cover. ***Used only on 550 volt Special Finish Meter. 106 DIMENSIONS OF FRONT CONNECTED TWO -WIRE T. R. WATTMETERS 100 TO J50 AMPS. 50 TO 600 VOLTS FORMS D-J AND D-2 -,o.i ^tioie- -^ W- 1 I 615** 1* 1 , e"fe I ^.2. %tiQje___ m Ufe:3L[ i JfcHoJe_ L_ j 6fe** T I 10^' i I 7 I I HlV Amps. Volts Form Fig. 100-150 100-150 *100-150 50-220 550-600 50-600 D-l or 2 1 2 1 * Special Finish— 500-600 volt Meter has separate resistance. ** Indicates space necessary to remove cover. *** Used only on 500 volt Special Finish Meter. 107 DIMENSIONS OF FRONT CONNECTED TWO-WIRE T, R, WATTMETERS 200-300 AMPS, 50-600 VOLTS FORMS D-l AND D-2 Amps. Volts Form Fig. Amps. Volts Form Fig. 200-300 50-600 D-l or 2 1 *200-300 50-600 D-l or 2 2 * Special Finish has separate resistance. ** Indicates space necessary to remove cover. ***Used on all Special Finish Meters. 108 DIMENSIONS OF FRONT CONNECTED TWO-WIRE T. R* WATTMETERS 450 AMPS, 50-600 VOLTS FORMS D-J AND D-2 Amps. Volts Form Fig. 450 *450 50-600 50-600 D-l or 2 1 D-l or 2 2 * Special Finish has separate resistance. ** Indicates space necessary to remove cover. *** Used on all Special Finish Meters. 109 DIMENSIONS OF FRONT CONNECTED TWO-WIRE T, R, WATTMETERS 600 AMPS, 50-600 VOLTS FORMS D-J AND D-2 »i5^«j«- Amps. Volts Form Fig. 600 *600 50-600 50-600 D-1 or 2 D-1 or 2 1 2 * Special Finish has separate resistance. ** Indicates space necessary to remove cover. *** Used on all Special Finish Meters. 110 DIMENSIONS OF FRONT CONNECTED TWO -WIRE T. R. WATTMETERS J 200 AMPS, 50-600 VOLTS FORMS D-J AND D-2 Fi<3. I m ml I 7£ -H 17" 1 1 1 I 1 k _ «5 Amps. Volts Form Fig. 1200 **1200 50-600 50-600 D-l or 2 D-l or 2 1 2 * Indicates space necessary to remove cover. ** Special finish has separate resistance. Ill DIMENSIONS OF FRONT CONNECTED THREE -WIRE T* R, WATTMETERS Sh-75 AMPS. 200-220 VOLTS FORMS J-\ t ]-2 t D-J AND D-2 ---10"% 1 Amps. Volts Form Fig, 15-75 200-220 200-220 J-1 or 2 D-1 or 2 1 2 * Indicates space necessary to remove cover. 112 DIMENSIONS OF FRONT CONNECTED THREE-WIRE T. R, WATTMETERS J 00-300 AMPS. 200-220 VOLTS FORMS D-J AND D-2 HHQle^^ Amps. Volts Form Fig. 100-150 200-300 200-449 200-600 D-1 or 2 D-1 or 2 1 2 * Indicates space necessary to remove cover. 113 DIMENSIONS OF BACK CONNECTED TWO -WIRE T. R, WATTMETERS 3 TO 50 AMPS, 50-600 VOLTS FORMS J-J, J-2, D-J AND D-2 Amps. Volts Form Fig. 3-10 *15 15-50 50-600 J-1 or 2 J-1 D-1 or 2 1 1 2 * Applies to J-1, No. 3 (Japan) finish only. ** Indicates space necessary to remove cover. 114 DIMENSIONS OF BACK CONNECTED TWO -WIRE T, R, WATTMETERS 75-300 AMPS, 50-600 VOLTS FORMS D-J AND D-2 i^tAid/' id/ & — ag: 1 Amps. Volts Form Fig. 75-150 200-300 50-600 50-600 D-1 or 2 D-1 or 2 1 2 ** Indicates space necessary to remove cover. 115 DIMENSIONS OF BACK CONNECTED TWO-WIRE T. R, WATTMETERS 450-600 AMPS. 50-600 VOLTS FORMS D-J AND D-2 Fi£ I fctdsL* A^t^d. ri£.2 iltioL^ L 4.«2.wd Amps. Volts Form Fig. 450 600 50-600 D-l or 2 1 2 ** Indicates space necessary to remove cover. 116 DIMENSIONS OF BACK CONNECTED T, R, WATTMETERS J200 AMPS. 50-600 VOLTS FORMS D-J AND D-2 8'hoi«_, 4§fcys*.M— r^ g fc^SM *■ Amps. Volts Form 1200 50-600 D-l or 2 * Indicates space necessary to remove cover. 117 DIMENSIONS OF BACK CONNECTED THREE -WIRE T, R* WATTMETERS 3^-50 AMPS, 200-220 VOLTS FORMS J- J, J-2, D-\ AND D-2 rio.i. ll't^'e. ■ L Q $ 1 A'suad__y 7tTP #"> ^tt t - if-r ft" WwUwHtJiww ^r' r<-i J J J J J il 1 - t;. 1 - a - - y- ,1/^ilTitititititi.li £ k Amps. Volts Form Fig. 3£-7£ 15-50 200-220 200-220 J-1 or 2 D-1 or 2 1 2 * Indicates space necessary to remove cover. 118 DIMENSIONS OF BACK CONNECTED THREE-WIRE T. R, WATTMETERS 75-300 AMPS. 200-220 VOLTS FORMS D-1 AND D-2 Fi^l ^Q'e. ^tudy I ,0% 1 N^ 6V %^Uad/ i I 9% A i ^St-ud | 10 ^ 1 Amps. Volts Form Fig. 75-150 200-300 200-220 200-220 D-1 or 2 D-1 or 2 1 2 * Indicates space necessary to remove cover. 119 DIMENSIONS OF FRONT CONNECTED STATION ARC METERS 6.6-9.6 AMPS, 1750-6250 VOLTS r ---»-^« T — r — J %H_Q\e^ III \A%--—* 1^ t»J I- 17£ - »**8 J FJ0.-2 IK Hi" IJ Volts Fig. No. Used 1750 2 1 2500 1 1 3250 1 1 4000 2 2 5000 1 2 6250 1 2 * Indicates space necessary to remove cover. 120 DIMENSIONS OF BACK CONNECTED STATION ARC METERS WITH RESISTANCE BOXES 6.6-9,6 AMPS. J 750-6250 VOLTS 4^-bud, 10%' 1 & .1 tig- Fig.l Fig,. Q. II U— e-J , IIUho^ II ^ '_± 1 Volts Fig. No. Used 1750 2 1 2500 1 1 3250 1 1 4000 2 2 5000 1 2 6250 1 2 * Indicates space necessary to remove cover. 121 DIMENSIONS OF CEILING BOARD ARC METERS 6.6-9,6 AMPS, 200-400 VOLTS idote * Indicates space necessary to remove cover. 122 DIMENSIONS OF TWO -WIRE HIGH CAPACITY T, R, WATTMETERS 800-1500 AMPS, 50-600 VOLTS FORM GG-3 r y -an | l2.Threads ia5' Per- Inch. K> I— d .1 ■ ~ "1 nj! ► 5a i ifipH ^T^ h~€ Drilling in Swi-bohlooarcl ^I'SfJUl _£ — i— .i-i H2l^ e>l i i i i i I ¥ i STUDS CLAMPING NUTS CONTACT NUTS Amps. a b c d e f g No. Used per Stud e f g No. Used per Stud 800 li- 1 " IF 4*" 2x 3 B " 017" ^32 3" T 1 2ft" 2M" 1" 1 1200 lf" H" ir 5h" 2|" Q 3 " 1500 H" I*" «- 5§" 2|" W 1" 1 2 J" 3ft" 1" 2 123 DIMENSIONS OF TWO-WIRE HIGH CAPACITY T. R, WATTMETERS 2000-6000 AMPS. 50-600 VOLTS FORM GG-4 Eg rff s EThread« Per\B-ich> - ym 1 b t —Iff 1 c— , h-f-i f»i- •d * -d r.^.a STUDS NUTS Amps. a b c Fig. d e f No.Used per Stud 2000 17" X 8 If 6" 1 1" 3 " 97" ^16 3 3000 2|" 2 " 7" 1 1" 3r 4iV 4 4000 2|" 21" 7" 1 1" 31" 41" 4 6000 3§" 3f" 10" 2 1" 4|" 5 " 6 134 DIMENSIONS OF TWO -WIRE HIGH CAPACITY T. R, WATTMETERS 8000-J0000 AMPS, 50-600 VOLTS FORM GG-4 -d STUDS NUTS Amps. a b c d e f No. Used per Stud 8000 10000 4|" 4|" 4 " 4|" 14 " 1" 1" 5|" 6 " 512" 6|" 7 9 125 DIMENSIONS OF THREE -WIRE HIGH CAPACITY T. R, WATTMETERS 80CM500 AMPS, 200-220 VOLTS FORM GG-3 *\zlr-- -it iT t | l2Th reads z." J l. Per- inch ' a I ' ■ --114* — - ■+- 1 -f ^ PrHlii Switch k 5, ,1 Prilling in Switchboard I j wmyf he *ia-!6Thr-eads I 1 5£ 4 I8|' I I ,v STUDS CLAMPING NUTS CONTACT NUTS Amps. a b c d e f g No. Used per Stud e f g No. Used per Studs 800 li" 1 " li" 4k" 2ft" Ol 7" ^32 1" 1 2 T y 017" •<%2~ 1" 1 1200 If" li" if" 5h" 2|" O 3 » !" 1 2|" 3ft" 1" 2 1500 If" W l!" 5h" 2|" Q_3_" °16 1" 1 n3'/ 3ft w 1" 2 136 DIMENSIONS OF THREE-WIRE HIGH CAPACITY T, R. WATTMETERS 2000-6000 AMPS. 200-220 VOLTS FORM GG-4 -W-* ,2 i rtefrfr zi" |-r1&- I . I 1 - Dr/Z/i/jg /n Swtchboorc/ 2000-4QOO/1™p ***: FtqZ < STUDS NUTS Amps. a b c Fig. d e f Xo. Used per Stud 2000 11" J3" 6" 1 1" 3 " O 7 " 3 3000 2§" 2 " ' 7" 1 1" H" **" 4 4000 2|" 2|" 7" 1 1" 31" **" 4 eooo 3|" 3|" | 10" 2 1" 4f" 5 " 6 137 DIMENSIONS OF CASE CONTAINING CLOCK MECHAN- ISM FOR SINGLE DIAL TWO-RATE METERS. PENDULUM CLOCK 138 DIMENSIONS OF DOUBLE-PAWL PREPAYMENT ATTACHMENT FOR THOMSON RECORD- ING WATTMETER 5 to 25 Amperes, 50 to 110 Volts, Two-wire. 5 to 15 Amperes, 200 to 220 Volts, Two-wire. 3* to 15 Amperes, 200 to 220 Volts, Three-wire. 129 DIMENSIONS OF WATTMETER FOR RAILWAY USE 25 TO 200 AMPS. 500-600 VOLTS SC Fitf^ 4. b— aa'-H-a- ®r ■'a r^r €- I 6' 'I t-^ « DIMENSIONS NOT GIVEN, SAME AS FIG. \ Amps. Volts Fig. 25-50 100-200 500-600 500-600 . 1 2 130 DIMENSIONS OF FORM 2 RESISTANCE AND REAC- TIVE COIL BOXES FOR INDUCTION, POLYPHASE AND T. R. WATTMETERS Fig. 1 *Lead Holes T. R. Wattmeters Induction Meters Polyphase, 3-wire. 2 and 3-phase " 4 " 2-phase Primary . " 4 " 2-phase Secondary A-E A-E A-C-E A-C-E A-E-F-J * |" Holes, to be drilled only when it is necessary to carry the leads through the switchboard. 131 DIMENSIONS OF 25-125 CYCLES FRONT CONNECTED TWO-WIRE SINGLE-PHASE INDUCTION METERS 3- J 50 AMPS, \ 00-220 VOLTS T^i !S J " LDrill jf Drill Fio.a. Jr---JL_~ Hi s£-H Amps. Volts Fig. 3-25 50-150 100-220 100-220 t 2 132 DIMENSIONS OF 25-125 CYCLES ROUND PATTERN BACK CONNECTED PRIMARY SINGLE- PHASE INDUCTION METERS 3-J50 AMPS. U00-2200 VOLTS Amps. Volts Fig. 3- 25 50-150 1100-2200 1100-2200 1 2 133 DIMENSIONS OF 25425 CYCLE FRONT CONNECTED THREE -WIRE SINGLE-PHASE INDUCTION METERS 3£- J 50 AMPS. 200-220 VOLTS FORM C-4 &9rA Fig, I. S"Dri'il *TP"-->,laf--" E ii •--si 1 U& L__ 6 |-. £5C'!ii Amps. Volts Fig. 3|- 25 50 -150 200-220 200-220 1 2 134 DIMENSIONS OF 40 CYCLES AND OVER HIGH TORQUE 2 AND 3-WIRE INDUCTION METERS 3- J 50 AMPS, |_Holc n^£k$2iV .V DIMENSIONS Capacity a b c d e f 3 to 25 50 to 150 1" 5" 3" r r i" 137 SYMBOLS USED WITH THOMSON WATTMETERS Round Pattern Polyphase Meter □ Round Pattern S/nq/e-Phase /nduct/on Met er Rectanqu/ar Pattern Po/yphase Meter Thomson S/nq/e-Phase /nduct/on Meter Shunt r/e/d Commutator A V TR. Wattmeter /v'e/C Coi/s Miqh Torque /nduct/on Meter /Laq Co// --EZBSZS-- -AAMAAMA^ ReactiVe Co// Res/stance in Meter /n Separate Box or Extension 4— f Potent/a/ Transformer Et -wwv— Res /stance in Separate Qox 138 CONNECTIONS OF THOMSON RECORDING WATTMETERS CONNECTIONS On page 138 are given the diagrammatic symbols as used with diagrams and which will be found useful in interpreting connections. THOMSON RECORDING WATTMETERS (COMMUTATING TYPE) FORMS y\ AND J-2; D-J AND D-2 FRONT CONNECTED, 2-WIRE, SECONDARY CIRCUITS Amp. Capacity 3 to 50 75 to 600 1200 Transformers None Current Page 145 146 147 148 BACK CONNECTED, 2-WIRE, SECONDARY CIRCUITS 3 to 600 1200 None Current 149 150 151 FRONT CONNECTED, 3-WIRE SECONDARY CIRCUITS, 2>\ to 150 200 to 300 None it 152 153 BACK CONNECTED, 3-WIRE, SECONDARY CIRCUITS 3| to 150 200 to 300 None 154 155 FRONT CONNECTED, PRIMARY CIRCUITS 3 to 600 Potential Current and Potential 156 157 BACK CONNECTED, PRIMARY CIRCUITS Amp. Capacity Transformers Page 3 to 600 Potential Current and Potential 158 159 140 CONNECTIONS OF HIGH CAPACITY G-2, GG-3 AND GG-4 DIRECT CUR- RENT ASTATIC WATTMETERS Amp. Capacity Form Wire Page 800- 1500 GG-3 2 160 2500-10000 G-2 2 161 2000-10000 GG-4 2 162 800- 1500 GG-3 3 163 2000- 6000 GG-4 3 164 ARC CIRCUIT METERS Page Station Type, Front Connected Station Type, Back Connected . Ceilingboard Type 165 165 166 MISCELLANEOUS METERS Railway . Prepayment (2- wire) Prepayment (3-wire) Two- Rate (2-wire) Two-Rate (3-wire) Portable . Page 167 168 169 170 171 172 141 CONNECTIONS OF THOMSON SINGLE-PHASE FORM C-4 AND ROUND PATTERN INDUCTION METERS FRONT CONNECTED, 2-WIRE SECONDARY CIRCUITS Frequency Transformers Page 25- 40 Cycles 25- 40 60-125 " 60-125 " None Current None Current 173 Fig. 1 173 Fig. 2 174 Fig. 1 174 Fig. 2 BACK CONNECTED, 2-WIRE SECONDARY CIRCUITS 25- 40 Cycles None 175 25- 40 Current 176 60-125 None 177 60-125 " Current 178 FRONT CONNECTED, 3-WIRE SECONDARY CIRCUITS 25- 40 Cycles 60 125 " 179 Fig. 1 179 Fig. 2 FRONT CONNECTED, PRIMARY CIRCUITS 25- 40 Cycles 25- 40 60-125 60-125 " Potential Potential and Current Potential Potential and Current 173 Fig. 3 173 Fig. 4 174 Fig. 3 174 Fig. 4 BACK CONNECTED, PRIMARY CIRCUITS 25- 40 Cycles Potential 180 25- 40 " Potential and Current 181 60-125 " Potential 182 60-125 " Potential and Current 183 143 CONNECTIONS OF HIGH TORQUE INDUCTION METERS FRONT CONNECTED, 2-WIRE SECONDARY CIRCUITS Frequency Transformers Page 40-125 Cycles 40-125 " None Current 184 Fig. 1 184 Fig. 2 FRONT CONNECTED, 3-WIRE SECONDARY CIRCUITS 40-125 Cycles None 185 FRONT CONNECTED, PRIMARY CIRCUITS 40-125 Cycles 40-125 " Potential Potential and Current 184 Fig. 3 184 Fig. 4 POLYPHASE METERS On pages 186-188 will be found internal connection diagrams of rectangular and round pattern Meters. 143 CONNECTIONS OF THOMSON POLYPHASE METERS FOR 3-WIRE, TWO AND THREE-PHASE AND MONOCYCLIC CIRCUITS RECTANGULAR PATTERN, FRONT CONNECTED Frequency Transformers Page 25 Cycles 25 25 30-125 " 30-125 " 30-125 " None Current Current and Potential None Current Current and Potential 189 190 191 192 193 194 ROUND PATTERN, BACK CONNECTED 25 Cycles None 195 25 Current 196 25 Current and Potential 197 30-125 " None 198 30-125 " Current 199 30-125 " Current and Potential 200 4-WIRE, TWO-PHASE CIRCUITS RECTANGULAR PATTERN, FRONT CONNECTED 25 Cycles None 201 25 Current 202 25 Current and Potential 203 30-125 " None 204 30-125 " Current 205 30-125 " Current and Potential 206 ROUND PATTERN, BACK CONNECTED 25 Cycles None 207 25 Current 208 25 Current and Potential 209 30-125 " None 210 30-125 k< Current 211 30-125 " Current and Potential 212 144 CONNECTIONS OF FRONT CONNECTED TWO -WIRE T, R, WATTMETERS 3-50 AMPS. 50-600 VOLTS FORMS J-J, J-2, D-J AND D-2 ^ o ffl -wvwvwwv 1 Line Load 14c CONNECTIONS OF FRONT CONNECTED TWO -WIRE T, R. WATTMETERS 75-600 AMPS. 50-600 VOLTS FORMS D-J AND D-2 146 CONNECTIONS OF FRONT CONNECTED TWO-WIRE T. R. WATTMETERS J 200 AMPS. 50-600 VOLTS FORMS D-J AND D-2 147 CONNECTIONS OF FRONT CONNECTED T, R, WATTMETERS WITH CURRENT TRANS- FORMER FOR SECONDARY CIRCUITS 50-600 VOLTS TYPE CF, FORMS J-J OR 2 AND D-J OR 2 a. jmi .ftA«y >rti!i ^wwwwww- ¥ ex. Une r-^L Load 148 CONNECTIONS OF BACK CONNECTED TWO -WIRE T. R. WATTMETERS 3-600 AMPS, 50-600 VOLTS FORMS J- J, J-2, D-J AND D-2 Connections as seen from front of board. 149 CONNECTIONS OF BACK CONNECTED TWO-WIRE T, R. WATTMETERS J 200 AMPS, 50-600 VOLTS FORM D-J OR D-2 Line MfhWrrrrm pill. Load Connections as seen from front of board. 150 CONNECTIONS OF BACK CONNECTED TWO-WIRE T. R WATTMETERS WITH CURRENT TRANSFORMER FOR SECONDARY CIRCUITS 50-600 VOLTS FORMS J- J, J-2, D-l AND D-2 Connections as seen from front of board. 151 CONNECTIONS OF FRONT CONNECTED THREE -WIRE T, R. WATTMETERS 3£- J 50 AMPS. 200-220 VOLTS FORMS J-J, J-2, D-i AND D-2 152 CONNECTIONS OF FRONT CONNECTED THREE -WIRE T. R. WATTMETERS 200 AND 300 AMPS, 200-220 VOLTS FORMS D-J AND D-2 T T oad Pleurt^r-al $ *- 1S3 CONNECTIONS OF BACK CONNECTED THREE -WIRE T. R, WATTMETERS 3h-l50 AMPS. 200-220 VOLTS FORMS J- J, J-2, D-X AND D2 L/me m j— WWW— | neutral JLoad Connections as seen from front of board. 154 CONNECTIONS OF BACK CONNECTED THREE -WIRE T. R, WATTMETERS 200 AND 300 AMPS, 200-220 VOLTS FORMS D-J AND D-2 ¥ f\ T T Line | L ja a is — sr Neutral^ c \ JLoad Connections as seen from front of board. 155 CONNECTIONS OF FRONT CONNECTED PRIMARY T. R. WATTMETERS FOR CIRCUITS NOT EXCEEDING 2500 VOLTS 3-600 AMPS. FORMS J- J, J-2, D-J AND D-2 ivv Uj ^ j Vr U -vVW\\VWWVWW\W- -WWWWV\^-| ' — ^r\ Uine Load RT. 156 CONNECTIONS OF FRONT CONNECTED PRIMARY T. R. WATTMETERS FOR CIRCUITS EXCEED- ING 2500 VOLTS FORMS Jf-1, J-2, D-J AND D-2 f r w l^u MWAWWWVWAWV 1 ■^WWWMA-1 Line Load 157 CONNECTIONS OF BACK CONNECTED PRIMARY T. R. WATTMETERS FOR CIRCUITS NOT EXCEEDING 2500 VOLTS 3-600 AMPS. FORMS J-J, J-2, D-I AND D-2 Connections as seen from front of board. 158 CONNECTIONS OF BACK CONNECTED PRIMARY T. R, WATTMETERS FOR CIRCUITS EXCEEDING 2500 VOLTS FORMS J- J, J-2, D-J AND D-2 rt__r -.V.'.Y.V.V.V.V.V.V.V.'- I CT. "l ww 13 ET Lin© Connections as seen from front of board, 159 CONNECTIONS OF BACK CONNECTED TWO -WIRE HIGH CAPACITY WATTMETERS 800- J 500 AMPS. 50-600 VOLTS FORM GG-3 Connections as seen from front of board. 160 CONNECTIONS OF BACK CONNECTED TWO-WIRE HIGH CAPACITY THOMSON RECORDING WATTMETERS 2500- J 0000 AMPS. 50-600 VOLTS FORM G-2 + C rVWWV m n 'j^^i Generator r^/VWV E>m«. Connections as seen from front of board. =J + Generator. 161 CONNECTIONS OF BACK CONNECTED TWO-WIRE HIGH CAPACITY THOMSON RECORDING WATTMETERS 2000- J 0000 AMPS, 50-600 VOLTS FORM GG-4 ja a -f / 8U3. Generator. \ V lei nWrl Load. Connections as seen from front of board. 163 CONNECTIONS OF BACK CONNECTED THREE-WIRE HIGH CAPACITY THOMSON RECORDING WATTMETERS 800-J500 AMPS. 200-220 VOLTS FORM GG-3 Connections as seen from front of board. 163 CONNECTIONS OF BACK CONNECTED THREE -WIRE HIGH CAPACITY THOMSON RECORDING WATTMETERS 2000-6000 AMPS, 200-220 VOLTS FORM GG-4 Connections as seen from front of board. Note.— Load and generator connections are interchangeable; top bus is always +. Leads of potential circuit, always on generator side, the leads of lightning arresters on the load side. If generator is on the left, the potential leads at the meter must be interchanged. 164 CONNECTIONS OF STATION ARC METERS FRONT AND BACK CONNECTED 6.6-9.6 AMPS. J 750-6250 VOLTS External Resistance J 1 Jgp EH l^WVWWWV- Line Load Connections as seen from front of board. Note. — On circuits of 3300 volts or over two resistance boxes are tised, being connected in series. 165 CONNECTIONS OF CEILING BOARD ARC METER 6,6-9.6 AMPS. 200-400 VOLTS FORMS JM-J OR 2 Lime. Lamps 166 CONNECTIONS OF T. R, WATTMETERS FOR RAILWAY SERVICE 25-200 AMPS. 500-600 VOLTS To Trolley ■vwwi 1-6HB— ■ i f==^ r-C mr I ,, J yy> To Cor>broller- 167 CONNECTIONS OF TWO-WIRE T. R. WATTMETER WITH FORM 2 PREPAYMENT DEVICE 3-25 AMPS. 50-JJO VOLTS 3-15 AMPS. 200-220 VOLTS 168 CONNECTIONS OF THREE -WIRE T. R* WATTMETERS WITH FORM 2 PREPAYMENT DEVICE 3£-J5 AMPS. 200-220 VOLTS fT'J ¥ l mmamm/h 5 Line ft 25-40 CYCLES. FIG. J Load 60 CYCLES AND ABOVE. FIG. 2 179 CONNECTIONS OF 25-40 CYCLE BACK CONNECTED SINGLE-PHASE INDUCTION METER 3-J50 AMPS, JOOO-2500 VOLTS Connections as seen from front of board. 180 CONNECTIONS OF 25-40 CYCLE BACK CONNECTED ROUND PATTERN SINGLE-PHASE INDUCTION METER ABOVE J 50 AMPS. AND 600 VOLTS AND ALL AMPERE CAPACITIES ABOVE 2500 VOLTS Connections as seen from front of board. 181 CONNECTIONS OF 60 CYCLE AND OVER BACK CON- NECTED ROUND PATTERN SINGLE-PHASE INDUCTION METER 3- J 50 AMPS. 1000-2500 VOLTS Connections as seen from front of board. 183 CONNECTIONS OF 60 CYCLE AND OVER BACK CON- NECTED ROUND PATTERN SINGLE-PHASE INDUCTION METER ABOVE J 50 AMPS. AND 600 VOLTS AND ALL AMPERE CAPACITIES ABOVE 2500 VOLTS Connections as seen from front of board. 183 CONNECTIONS OF FRONT CONNECTED HIGH TORQUE TWO-WIRE SINGLE-PHASE INDUCTION METERS FOR 40 CYCLES AND OVER Line r&\ a D p Load Line =o=F ±± 3 to 150 Amps. 50 to 600 Volts FIG. 1 3 to 150 Amps. Above 600 Volts FIG. 3 4 a D F=3 Line Above 150 Amps. 50 to 600 Volts FIGS. 2 Load D f4 CT. Line a Load Above 150 Amps, and 600 Volts and all Amp. capacities above 2500 volts FIGS. 4 184 CONNECTIONS OF FRONT CONNECTED HIGH TORQUE THREE -WIRE SINGLE-PHASE INDUCTION METERS FOR 40 CYCLES AND OVER 200-220 VOLTS € ( 1 2) D Line Load 185 INTERNAL CONNECTIONS OF RECTANGULAR PAT- TERN POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE, 4-WIRE 2-PHASE, AND MONOCYCLIC CIRCUITS WITHOUT TRANSFORMERS For 3-phase, 3-wire, 2-phase and monocyclic circuits of 30 cycles and over omit "B." For these circuits of 25 cycles and for all 4- wire, 2-phase circuits connect Lead "A" to it. Arrow indicates direction of winding from starting lead. 186 INTERNAL CONNECTIONS OF RECTANGULAR PAT- TERN POLYPHASE METER FOR 3- WIRE 2 AND 3-PHASE, 4-WIRE 2-PHASE, AND MONOCYCLIC CIRCUITS WITH TRANSFORMERS Arrow indicates direction of winding from starting lead. 187 INTERNAL CONNECTIONS OF ROUND PATTERN POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE, 4-WIRE 2-PHASE, AND MONOCYCLIC CIRCUITS Arrow indicates direction of winding from starting lead. 188 CONNECTIONS OF 25 CYCLE FRONT CONNECTED RECTANGULAR POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE AND MONOCYCLIC SECOND- ARY CIRCUITS 3- J 50 AMPS, 50-600 VOLTS On Monocyclic Circuits the wire marked A is the teaser. 189 CONNECTIONS OF 25 CYCLE FRONT CONNECTED RECTANGULAR POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE AND MONO- CYCLIC SECONDARY CIRCUITS ABOVE J50 AMPS. 50-600 VOLTS Line ?q □ C T Load CT On Monocyclic Circuits the wire marked A is the teaser. 190 CONNECTIONS OF 25 CYCLE FRONT CONNECTED RECTANGULAR POLYPHASE METER FOR 3 -WIRE 2 AND 3-PHASE AND MONO- CYCLIC PRIMARY CIRCUITS ALL CAPACITIES ABOVE 600 VOLTS >T 3—S- ■M^ < < i r ~* ~> f t f □ 4-4 4-4 C.T. Load On Monocyclic Circuits the wire marked A is the teaser. 191 CONNECTIONS OF 30 CYCLE AND OVER FRONT CON- NECTED RECTANGULAR POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE ANDIMONO- CYCLIC SECONDARY CIRCUITS 3-J50 AMPS. 50-600 VOLTS □ " JLine Load -X On Monocyclic circuits the wire marked A is the teaser. 193 CONNECTIONS OF 30 CYCLE AND OVER FRONT CON- NECTED RECTANGULAR POLYPHASE METER FOR 3 -WIRE 2 AND 3-PHASE AND MONO- CYCLIC SECONDARY CIRCUITS ABOVE 150 AMPS, 50-600 VOLTS -A □ C.T. Load C.T. On Monocyclic Circuits the wire marked A is the teaser. 193 CONNECTIONS OF 30 CYCLE AND OVER FRONT CON- NECTED RECTANGULAR POLYPHASE METER FOR 3 -WIRE 2 AND 3-PHASE AND MONO- CYCLIC PRIMARY CIRCUITS ALL CAPACITIES ABOVE 600 VOLTS u -A 6 6 P.T. □ Loaa OnlMonocyclic Circuits the wire marked A is the teaser. 194 CONNECTIONS OF 25 CYCLE BACK CONNECTED ROUND PATTERN POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE AND MONO- CYCLIC SECONDARY CIRCUITS 3-150 AMPS. 50-600 VOLTS Connections as seen from front of board. On Monocyclic Circuits the wire marked A is the teaser. 195 CONNECTIONS OF 25 CYCLE BACK CONNECTED ROUND PATTERN POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE AND MONO- CYCLIC SECONDARY CIRCUITS ABOVE \ 50 AMPS. 50-600 VOLTS Connections as seen from front of board. On Monocyclic Circuits the wire marked A is the teaser. 196 CONNECTIONS OF 25 CYCLE BACK CONNECTED ROUND PATTERN POLYPHASE METER FOR 3 -WIRE 2 AND 3-PHASE AND MONO- CYCLIC CIRCUITS ALL CAPACITIES ABOVE 600 VOLTS Connections as seen from front of board. On Monocyclic Circuits the wire marked A is the teaser. 197 CONNECTIONS OF 30 CYCLE AND OVER BACK CON- NECTED ROUND PATTERN POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE AND MONO- . CYCLIC SECONDARY CIRCUITS 3-150 AMPS, 50-600 VOLTS . Connections as seen from front of board. On Monocyclic Circuits the wire marked A is the teaser. 198 CONNECTIONS OF 30 CYCLE AND OVER BACK CON- NECTED ROUND PATTERN POLYPHASE METER FOR 3 -WIRE 2 AND 3-PHASE AND MONO- CYCLIC SECONDARY CIRCUITS ABOVE J50 AMPS. 50-600 VOLTS Line Load Connections as seen from front of board. On Monocyclic Circuits the wire marked A is the teaser. 199 CONNECTIONS OF 30 CYCLE AND OVER BACK CON- NECTED ROUND PATTERN POLYPHASE METER FOR 3-WIRE 2 AND 3-PHASE ANDl MONO- CYCLIC CIRCUITS ALL CAPACITIES ABOVE 600 VOLTS Connections as seen from front of board. On Monocyclic Circuits the wire marked A is the teaser. 200 CONNECTIONS OF 25 CYCLE FRONT CONNECTED RECTANGULAR POLYPHASE METER FOR 4 -WIRE 2-PHASE SECONDARY CIRCUITS 3-150 AMPS. 50-600 VOLTS l.JIr. ~CSS £/fr □ ■™ I st Phase Une i_oacA a nd Phase 201 CONNECTIONS OF 25 CYCLE FRONT CONNECTED RECTANGULAR POLYPHASE METER FOR 4 -WIRE 2-PHASE SECONDARY CIRCUITS ABOVE 150 AMPS. 50-600 VOLTS L. II R. r^ $T£ h ¥ Q □ C.T. [sr phase Line Load C.T. 2 nd Phase 202 CONNECTIONS OF 25 CYCLE FRONT CONNECTED RECTANGULAR POLYPHASE METER FOR 4 -WIRE 2-PHASE PRIMARY CIRCUITS ALL CAPACITIES ABOVE 600 VOLTS 203 CONNECTIONS OF 30 CYCLE AND OVER FRONT CON- NECTED RECTANGULAR POLYPHASE METER FOR 4 -WIRE 2-PHASE SECONDARY CIRCUITS 3-J50 AMPS. 50-600 VOLTS □ ^ " ■ l« T Phase JLine JLoakd, JZ™ Phase 204 CONNECTIONS OF 30 CYCLE AND OVER FRONT CONNECTED RECTANGULAR POLYPHASE METER FOR 4-WIRE 2-PHASE SECONDARY CIRCUITS ABOVE J50 AMPS. 50-600 VOLTS □ 1 ^ ^^^ "1 C.T. l* r Phase Line Load C.T. - ;8, ncl Ph3ise 205 CONNECTIONS OF 30 CYCLE AND OVER FRONT CON- NECTED RECTANGULAR POLYPHASE METER FOR 4 -WIRE 2-PHASE SECONDARY CIRCUITS ALL CAPACITIES ABOVE 600 VOLTS CONNECTIONS OF 25 CYCLE BACK CONNECTED ROUND PATTERN POLYPHASE METER FOR 4 -WIRE 2-PHASE SECONDARY CIRCUITS 3-150 AMPS. 50-600 VOLTS L. R. i — dA^Vft- I ' « I st Phase Une Load. 2 na Phase Connections as seen from front of board. 307 CONNECTIONS OF 25 CYCLE BACK CONNECTED ROUND PATTERN POLYPHASE METER FOR 4 -WIRE 2-PHASE SECONDARY CIRCUITS ABOVE 150 AMPS, 50-600 VOLTS FPhase JLoetdl 2 nd 'Phase Connections as seen from front of board. 208 CONNECTIONS OF 25 CYCLE BACK CONNECTED ROUND PATTERN POLYPHASE METER FOR 4 -WIRE 2-PHASE PRIMARY CIRCUITS ALL CAPACITIES ABOVE 600 VOLTS Connections as seen from front of board. 209 CONNECTIONS OF 30 CYCLE AND OVER BACK CON- NECTED ROUND PATTERN POLYPHASE METER FOR 4 -WIRE 2-PHASE SECONDARY CIRCUITS 3-150 AMPS, 50-600 VOLTS \ i K. 1 1 st Phase Line Load £ nd Phase Connections as seen from front of board. 210 CONNECTIONS OF 30 CYCLE AND OVER BACK CON- NECTED ROUND PATTERN POLYPHASE METER FOR 4-WIRE 2-PHASE SECONDARY CIRCUITS ABOVE J50 AMPS, 50-600 VOLTS JLoad Connections as seen from front of board. 211 CONNECTIONS OF 30 CYCLE AND OVER BACK CON- NECTED ROUND PATTERN POLYPHASE METER FOR 4 -WIRE 2-PHASE PRIMARY CIRCUITS ALL CAPACATIES ABOVE 600 VOLTS Connections as seen from front of board. 312 INDEX Adjustable Shunt Field Coils Connections Data on . . Installing Armatures Meter Labels and marking of Arc Meters Armature Data- on . Connections Constants of Comparative Speeds of Dimension of . Finish of . of Installing . Jewels for . Orders for . Pivots for . Gear Ratio for Registers Registers of Weights of Back Connected Meters Connections of Dimensions of . Brushes, Care of Card Resistance, Data on Envelopes for . Calibration, Meter . Capacity, Lamp, H.P. and K\v. Card and Tube Resistance Constants, Meter . Commutators, Care of . Connections Armatures . Instrument Meter Shunt Field Coil . Symbols for Comparative Speeds, Meter Connections, Symbols . Covers, Meter Creeping, Meter Cyclometer, Dials . Page 24 58 22 53 54 56 141 44 52 86 19 28 26 21 26 44 34 80 140 82 28 63 25 38 76 63 39 28 53 34 140 24 139 50 139 19 30 22 Page Connections of Meters Thomson Recording Wattmeters Arc Circuit .... 141 High Capacity . . . .141 J-l, J-2, D-l, D-2 . . .140 Portable 141 Prepayment .... 141 Railway ..... 141 Two-Rate 141 Thomson Single-Phase Induc- tion 142 Thomson High Torque Induc- tion ..... 143 Thomson Polyphase Internal 143 Rectangular Pattern . 144r Round Pattern . 144 Symbols .... . 139 ials, Constants on Meter . . 41 irect Reading, Meters which are 39- -1, D-2 Meters Adjustable Shunt Field Coils for ... 22 and 58- Armatures for . 53 Brushes for . 2a Connections of . 140 Constants of .. 41 Comparative Speeds of . 50 Creeping of 30 Covers for 19 Calibration of . 38 Card Resistance Data for 63 Card Resistance Envelope foi ' 25 Dimensions of 84 Finish of . 19> Gear Ratio for Registers of 41 Horse-power Rating of . 76 Inductive Loads on 31 Installing .... 28 Jewels for . . . . 26- Lagging of 31 Light Load Adjustments for 29 Lamp Ratings of 76 Magnets for 6& 213 Page D-l, D-2 Meters— (Concluded) Non-Creeping Device for . 30 Name-Plate Stamping of . 38 Orders for . . . .21 Pivots for 26 Registers of . . .34 Resistance for . . . .63 Speeds of 50 Testing of .... 33 Total Resistance of 65 Studs for 79 Shunt Field Coils for . 22 and 58 Watt Loss .... 65 Dimensions of Meters Thomson Recording Wattmeters Arc Circuit . ... 86 Forms Made Previous to J-l, J-2 82 High Capacity . . .87 High Torque .... 89 J-l, 1-2, D-l, D-2 ... 84 Prepayment .... 87 Single-Phase Induction C-4 and R.P 88 Single-Phase Induction 3-wire 89 Street Car or Railway . . 87 Two-Rate .... 87 Thomson Recording Poly- phase Rectangular Pattern 90 Thomson Recording Poly- phase Round Pattern . . 90 Envelopes, Card Resistance . . 25 Finish, Meter 19 Finish, Jewel Screw . . -.27 Field Coils, Installing Shunt . 22 Connection of Shunt. . . 24 Data on Shunt ... 58 Formula, Meter .... 33 Form Letters, Meter ... 18 Front Connected Meters, Dimen- sions of 82 Front Connected Meters, Connec- tions of 140 General Remarks . . 21 and 31 Gears, Ratio of Meter Register . 41 Page GG-2 Meters Armature Data for Brushes for Connections of Comparative Speeds < Constants of Creeping of Covers for Calibration of Finish of . Gear Ratio for Registers of Horse -Power Rating of . Installing .... Jewels for . Magnets for Non-Creeping Device for Name-Plate Stamping of Lamp Ratings of Orders for . Pivots for . Resistance of . Speeds of . Shunt Field Coils for Total Resistance of Testing of Watt Loss of . GG-3 Meters Connections of . Dimensions of . Jewels for . Orders for Name-Plate Stamping of Pivots for . GG-4 Meters Connections of . Constants of Covers for Comparative Speeds of Creeping of Calibration of . Dimensions of . Finish of . . . Gear Ratio for Registers < Horse-Power Rating of Installing . of 214 Page GG-4 Meters— (Concluded) Jewels for .... . 26 Magnets for . 71 Non-Creeping Device for . 30 Xame-Plate Stamping of . 38 Lamp Ratings of . 76 Orders for .... . 21 Pivots for .... 26 Speeds of 52 Shunt Field Coils for 62 Testing of . 32 High Torque Induction Meter Connections of . 143 Constants of 48 Comparative Speeds of . 50 Calibration of . • 38 Creeping of 26 Dimensions of . 89 Finish of . 21 Installing .... 28 Jewels for .... 26 Lamp Ratings of 76 Magnet's of 73 Xame-Plate Stamping . 38 Non-Creeping Device for 26 Orders for 21 Pivots for ... 26 Registers of 34 Ratio of Gears . 48 Speeds of . 50 Testing of 32 Weights of SO Horse-Power Ratings, Meter 76, 77 Illustrations Arc Meters . 8, 9 Clock for Two- Rate Meters 10 D-2 Meter . 3 GG-4 Meter . 5 High Torque Induction Meter .... 12, 13 J-2 Meter .... 2 Meter Covers . . . . 20 Meter Dials . . . . 37 Polyphase Round Pattern Meter 17 Page Polyphase Rectangular Pat- tern Meter ... 14, 15 Prepayment Meter Device Single-Phase Round Pattern Meter Street Car or Railway Meter Switchboard Meter, No. 5 Finish Interpretation of Orders Instructions for Installing Shunt Field Coils . . . . Instructions for Installing Meters Instructions for Installing Arma- tures Instruments, Meter Testing . Induction Meters Polyphase Meters (see poly- phase) High Torque Meters (see high torque) Single-Phase C-4 and Round Pattern Connections of Constants of Comparative Speeds of Creeping of Dimensions of Finish of . Installing . Jewels for . Lamp Ratings of Magnets of Name-Plate Stamping of Non-Creeping Device for Orders for . Pivots for . Registers of Ratio of Gears Speeds of . Weights of Jewels, Meter . J-l, J-2 Meters, See data on D-l D-2 Meters Kilowatt Rating Meter . Labels, Armature . 11 16 3, 7 4 21 22 53 32 142 47 50 26 8S 21 28 26 76- 71 38 2a 21 26 34 47 50 80 26 54r 215 Page Page "Meters— (Continued) Meters— (Continued) Lamp, Rating Meter 76 Reverse Rotation of 31 Letters, Meter Form 18 Shunt Field Coils for . 22 and 58 Light Load Adjustments, Meter 25 Studs of 79 Location of Meters . 28 Speeds of 50 Load, Meter Testing 32 Testing of .... 32 Loss, Meter Watt . 65 Weights of . . . . 80 Monocyclic Meter (see polyphase) Watt Loss in . . . 65 Meters Watt Loss, Potential Circuit 65 Adjustable Shunt Field Coils Name-Plate, Meter 38 for ... 22 and 58 Non-Creeping Device, Meter 26,30 Armatures for . 53 Orders, Placing Meter . 21 Brushes f or 28 Primary Meters Card Resistance for 63 Single-Phase Induction Creeping of 26, 30 Connections of 142 Comparative Speeds of . 50 Constants for . 47 Covers for .... 19 Creeping of 26 Commutators of 28 Dimensions of . 88 Calibration of . 38 Finish of . 21 Constants of . 39 Horse-Power Rating of . 76 Connections of . 140 Lamp Rating of 76 Capacities of . 76,77 Magnets for 71 Checking of 32 Orders for . 21 Dimensions of . 82 Registers for 34 Dials of . . 37 Speeds of . 50 Envelopes for Resistance of 25 Testing of . 32 Finish of ... . . 19 Primary Meters Form Letters of . 18 Polyphase Induction General notes on 31 Connections of ; 144 Horse-Power Ratings of 76 Constants for . 49 Instruments for Testing 32 Creeping of 26 Installing .... 28 Dimensions of . 90 Jewels for .... 26 Finish of . . . . 21 Kilowatt Ratings of 77 Form Letters . 18 Load for Testing 32 Horse-Power Rating of . 77 Lamp Ratings of •76 Kilowatt Rating of . 77 Light Load Adjustments for 25 Magnets for 74 Magnets for . 68 Orders for . 21 Non-Creeping Device for 26,30 Registers for . 34 Name-Plate Stamping of 38 Speeds of . 50 Orders for .... . 21 Testing of . 32 Pivots for .... 26 Primary Meters Resistance of . 63 Thomson Recording Wattmetei Registers of . 34 Connections for 140 Record Book for 35 Constants for . 43 316 Page Page Meters — (Concluded) Orders for 21 Creeping of . 30 Pivots for 26 Dimensions of . . 86 Registers for .... 34 Finish of . . 19 Testing of .... 32 Magnets for . 70 Reading, Meter .... 34 Orders for . . . • . -1 Register Register f or . 34 Meter . . . 34 Speeds of . . 51 Cyclometer .... 22 Prepayment Meter Remarks Connection for . . 141 General 31 Dimension for . . 87 Ordering . ... 21 Orders for .... . 21 Resistance, Card and Tube . 63 Preface . 18 Resistance, Total .... 65 Pivots, Meter .... . 26 R. P.M. Meter 50 Potential Circuit Resistance a nd Reverse Rotation of Meter . 31 Watt Loss of Meter . 65 Screws, Meter Jewel 26 Polyphase Meters Shunt Field Coils, Connections . 24 Connections for . . . 144 Shunt Field Coils, Data on . 58 Constants for . . 49 Shunt Field Coils, Installing 22 Creeping of . 26 Speeds, Meter 50 Dimensions for . 90 Standard, Meter (see instruments) Finish of . . . . 21 Strength, Magnet .... 68 Horse-Power Rating of . 77 Stop Watches 33 Kilowatt Rating of . 77 Studs, Meter 79 Magnets for . 74 Testing Meter 32 Register for . 34 Testing, Meter Brush . 28 Speeds of . . 50 Testing Rack 32 Testing of . . 32 Three-Phase Meter (see polyphase Weights .... . 80 Three-Wire Meter Ratio, Gear .... . 49 Connections of . 140 Rating, Meter H.P., Kw. a nd Dimensions of . 82 Lamp .... . 76 Two-Phase Meter (see polyphase) Railway Meter Two-Rate Meter Calibration . 38 Connections for 141 Connections for . 141 Dimensions for 87 Constants for . . 44 Two-Wire Meter Dimension for . . 87 Connections of ... 140 Finish of ... . . 21 Dimensions of . 82 Jewels for . . 26 Tube Resistance .... 63 Magnets for . 70 Wattmeters (see meters) Xame-Plate Stamping of . 38 Watches, Stop .... 33 217 OCT 17 1903