. -� GEH-764AB SupiJf'sedes GEH-764AA

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Polyphase Switc.hboard

) :., ltatt... our Meters -.:-.. / ii' . _/ •,

TYPES DS-19, DSW-19, DSM�19, DS-20, DSW-20

DSM-20, DS-341 DSW-341. DSM-341 DS-35 c DSW-351 DSM-35, DS-381 DSW-381 DSM-38 DS-39 I . DSW·-39:· DSM-39 I DS-40 I DSM-40 DSW-4 W-41, DSM-411 DS-43 DSW-441 DSM-44

ElectricalPartManuals . GENERAL . ELECTRIC www . ElectricalPartManuals . com' com .·� .

TYPES COVERED • TWO-ELEMENT CONSTRUCTION THREE-ELEMENT CONSTRUCTION DS-19, DSW-19, DSM-19 (Surface Mount­ DS-20, DSW-20, DSM-20 (Surface Mount­ ing) ing) DS-34, DSW-34, DSM-34 (Semiflush Mount­ DS-35, DSW-35, DSM-35 (Semiflush Mount­ ing) ing) DS-38, DSW-38, DSM-38 (Drawout, Semi­ DS-39, DSW-39, DSM-39 (Drawout, Semi­ flush Mounting) flush Mounting) DS-40, DSW-40, DSM-40 (Drawout, Surface DS-41, DSW-41, DSM-41 (Drawout, Surface Mounting) Mounting) DS-43, DSW-43, DSM-43 (Drawout, Semi­ DS-44, DSW-44, DSM-44 (Drawout, Semi­ flush or Surface Mounting) flush or Surface Mounting)

ElectricalPartManuals .

These instructions do not purport to cover all details or variations in equipment nor to provide for every possible contingency to be met in connection with installation, operation or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter should be referred to the General Electric Company. 0

2 www . ElectricalPartManuals . com c POLYPHASE com SWITCHBOARD WATTHOUR METERS .

The Types DS-19, DS-34, DS-38, DS-40, and DS-43 next inserted completing the electric circuits through meters are back-connected, switchboard, two-stator, the meter and locking the latch on the cradle. The ., polyphase meters. The DS-20, DS-35, DS-39, DS-41, cover is drawn to the case by four thumb-screws, and DS-44 are the corresponding three-stator meters. holding the connecting plug in place. The above meters can be furnished self-contained The DS-43 meter is the latest model drawout in current capacities o. 5 and 10 amperes and for switchboard two-stator, polyphase meter. It super­ voltages up to 600 volts. Transformer-rated meters sedes the DS-38 and DS-40 meters, and is so designed can be furnished for use with both current and poten­ that it may be used either for surface or semi-flush tial transformers or with current transformers only. mounting. The DS-44 meter is the corresponding The meters are called Types DSW-19, DSW-34, three-stator meter replacing the DS-39 and DS-41 DSW-38, DSW-40, DSW-43, and DSW-20, DSW-35, meters and is also designed for use either for surface DSW-39, DSW-41, and DSW-44 when they are equip­ or semiflush mounting. Screws for semiflush mount­ ped with contact device terminals and 2-wire or 3-wire ing are inserted from the back of the panel into thread­ contact devices. Separate instructions covering the bosses on the mounting flange. Screws and bosses contact devices accompany such meters. are hidden by the cover. An assortment of hardware The meters are known as Types DSM-19, DSM-34, providing for any of mounting (semiflush, sur­ c DSM-38, DSM-40, DSM-43, and DSM-20, DSM-35, face, metal or insulating panel), and either type of DSM-39, DSM-41, and DSM-44 watthour demand connection (threaded stud with nuts and flat washers meters when they are equipped with demand meter or washer screw with prong washer) accom­ registers. Separate instructions covering the register panies each meter. and containing supplementary diagrams and dimen­ The proper dimension sketch given in this book sions accompany these watthour demand meters. should be followed for switchboard drilling. The INSTALLATION meters have jewel bearings which may be injured by The DS-19 and DS-20 polyphase watthour meters rough handling; consequently all wiring and hammer­ are designed for surface mounting and are equ\pped ing should be done on the switchboard before the with two studs for this purpose the top center and meters are installed. bottom center of the case. The meters have removable studs and are shipped The DS-34 and DS-35 meters are the corresponding with the studs removed. polyphase watthour meters available for semiflush Before placing the meter in service, remove the mounting. The meter is mounted through the panel shipping device and sure that the meter is with the flange against the front of the panel. Holes perfectly clean and in good operating condition. c in the flange will accomodate mounting bolts or The meters are tested before shipment and only screws K6 in. in diameter. No other support is necessary. require connecting and sealing before being placed The DS-38, DS-39, ElectricalPartManualsDS-40, and DS-41 meters are in operation. similar to the DS-34, DS-35, DS-19, and DS-20 SEALING respectively, but provide. the additional advantage of The cover is held in position by sealing screws, four a drawout construction. The case for these meters on the drawout cases and two on all other meters. may be mounted and wired permanently before the The screws have knurled heads to permit tightening meter unit is placed in the case. The meter unit is with tlie fingers and are slotted to take all standard then installed by aligning it with the guides in the types of sealing devices. When assembling the cover and sliding into place. The connecting plug is on the meter, make sure that the edges enter the case

3 www . ElectricalPartManuals . com GEH-764AB Polyphase Switchboard Watthour Meters

recess in the meter base properly. The sealing screws auxiliary winding connected to these lamps as illust­ should not be tightened any than necessary to rated in Fig. 14. produce a slight compression of the felt gasket in the METERS FOR USE WITH CURRENT recess in the meter base. TRANSFORMERS 0 In order to utilize effectively the accuracy of these CONNECTIONS com The connection diagrams in this book show ap­ meters, 2.5-ampere meters are used with instrument proved methods of wiring the apparatus. Other current transformers. The current coils have. double methods are possible which are electrically equivalent the normal turns of the standard 5-ampere meter. The and which for particular installations may result in torque is therefore double, and affords the advantages more convenient or economical wiring. If properly inherent in such high-torque characteristics and with practically no sacrifice in accuracy throughout the {;Onnected in the circuit, the disk will rotate counter­ working range. clockwise, viewed from above. Under no conditions should the current circuits of Connections for the DSM and DSW type meters a transformer-rated meter be opened without first are identical to those for the DS type meters except short-circuiting the secondary winding of the current for the register motor connections for the DSM and transformer. This may be done either at the trans­ the contact device terminal connections for the DSW former terminals or the meter current terminals. line of meters. Removal of the connection plug in drawout type The current terminals are identified by the letter meters automatically short-ciPcuits the current termi­ C, the potential terminals by the letter P and the nals so that the meter unit can safely be removed contact device terminals by the letters K, Y, and Z. from the case. These three terminals and studs are furnished whether the meter has 2-wire or 3-wire contact devices. For CALIBRATING ADJUSTMENTS 2-wire contact devices only K and are connected, The letters S and F and the arrows on the retarding Z while for 3-wire contact devices all three are used. magnets denote the proper direction to turn all adjust­ Letters identifying the terminals are stamped on the ing screws for calibrating the meter. base. Full Load It is frequently desirable to use transformers in Full-load adjustment is accomplished by movable circuits of over 150 volts. The cases of meters which permanent magnets. are used with current and potential transformers The two magnets in the two-stator meter and the should be connected to the grounded side of the sec­ three magnets of the three-stator meter may be placed ondary circuit of such transformers. For this purpose in an approximately correct position and clamped. No. 12 Awg copper wire is suitable. A change in the position of any magnet affects all At the earth end of the wire the usual precautions stators alike. Moving the magnet in will increase the employed in connection with lightning arresters should speed of the meter, while conversely, moving the be followed. magnet out will decrease the speed of the meter. When the proper adjustment has been obtained, the POLARITY MARKINGS magnet should be clamped securely to its support by Instrument transformers have polarity markings of means of the clamping screw. white paint or markers, for primary and for H1 X1 To facilitate the clamping of the magnets, hexagon­ secondary, on or near one primary and one secondary al head screws are provided which are easily turned terminal. These markings denote the relative polar­ with a wrench. ity and facilitate making proper connections for cor­ Do not use special open-end wrenches rect direction of rotation of watthour meters. The for this purpose. They are not strong enough. Light Load relation of the marked leads is such that the instan­ The brackets supporting the lag and light load taneous direction of the current in them is the same; plates are attached to the frame. The one for the namely, toward the transformer in the marked prim­ upper stator is located just under the disk and the ary lead and from the transformer in the marked ElectricalPartManualsone for the lower stator, and the middle and lower in secondary lead, or vice versa. These polarity mark­ three-stator meters, is just over the disk. ings are indicated in the connection diagrams and . The light-load adjustment is- made by turning the should be followed irrespective of their physical lo­ adjusting screw located at the extreme right of the cation on the transformers. bracket. Turning the screw counterclockwise in­ POTENTIAL INDICATING LAMPS creases the speed of the meter and clockwise decreases Meters are furnished with potential circuit indicat­ it. The screw at the extreme left of the bracket should ing lamps and have special potential coils with an not be disturbed. 0

4 www . ElectricalPartManuals . com Polyphase Switchboard Watthour Meters GEH7 64A8

The effect of light-load adjustment varies inversely same direction, then tighten the lock nut. Turning with the load. For example, a 5 per cent change at clockwise decreases and counterclockwise increases 1/10 full-load current changes the calibration at full­ the torque of the stator. c load current approximately 0.5 per cent. READING THE METER REGISTER INDUCTIVE LOAD (WAlTHOUR STATORS) com The inductive-load adjustment is made by turning The meter register is of the dial type and is normal­ the screw located to the left of the light load adjusting ly furnished with a register ratio so that .it reads in screw. Turning the screw counterclockwise increases primary kilowatt-hours. the speed of the meter and clockwise decreases it. On meters measuring a large amount of power and If the lag plate is moved, full and light load should equipped with a "primary-reading" register a dial-face be checked. multiplier is printed below the dials. Meters furnished for 25- and 30-cycle service some­ For a "secondary-reading" register the actual read­ times are provided with an adjustable compensating ing must be multiplied by a constant which is the c coil. The purpose of this coil is to give additional ratio of primary energy to secondary energy, that is, ·�· range of adjustment for calibrating the meter at usually the product of the current and potential trans­ inductive loads. former ratios of the instrument transformers used The two ends of the figure-eight compensating coil with the meter. are extended beyond the meter stator and are connect­ Facing the meter, one revolution of the extreme ed by an adjustable slider soldered in position. The right pointer equals 10 kilowatt-hours; one revolution wires are covered with insulation tubing and both of the second, 100 kilowatt-hours, etc., except in the slider and wires are protected by an outer sleeving. case of meters which have a dial-face multiplier. These adjustable ends of the coils are located along One division of a circle, it will be seen, corresponds the edge of the back side of the meter frame. to one tenth of the total amount indicated by one These meters are adjusted in the factory so that complete revolution of the pointer. the front screw adjustment for inductive loads In deciding upon the reading of a pointer, the point­ provides a range sufficient for most conditions of er before it (to the right) must be consulted. Unless operation. Should it be necessary to change this the pointer has reached or passed the "0" or, in other range, its limits can be raised or lower�d by means of words, completed a revolution, the other has not com­ c the adjustable compensating coil. The procedure is pleted the division on which it may appear to rest. outlined below: For this reason ease and rapidity are gained by read- 1. Remove the outer sleeving and inner insula­ tion tubing, unsolder the sliding connector and move it to the desired position. I level Move the connector away from the stator to in­ crease the speed of the meter and toward the stator to decrease it. 2. Resolder the connector carefully in its new position. Guide bushing Allow the connector and wires to cool to room temperature before checking the meter, so its calibra­ tion will not be affected by the increased resistance of Jewel the coil due to heating. 3. When the connector has been set in its final Jewel c: position, reinsulate the wires with the proper tubing setting and replace the outer protective sleeving. Care should plug be taken to locate the buttElectricalPartManuals joints in the tubing so they are not opposite each other or a section of bare wire. Adjustments Between Stators Equalizing the torque. of the stators may be accom- plished from the front of the meters and without disturbing any of the parts. The meter stators are balanced at the factory, but if \� is necessary to make any change loosen the lock Fig. Oiltight jewel screw it turn the adjusting screws an equal amount in the 1. c: m , www . ElectricalPartManuals . com5 GEH-764AB Polyphase Switchboard WaHhour Meters

ing the meter register from right to left. Watthour Meter Jewel Oil be added, if required, to The constant marked on the nameplate or disk raise it to the level indicated in Fig. 1. It is not al­ is for use only in calibrating and checking the meter ways necessary to disassemble the jewel screw for a and must not be used in connection with the register second oiling, as there is little chance for the oil in the reading. reservoir to be lost. com Jewels shipped separately as supplies are not oiled at the factory and must therefore be oiled before they end of' . disk shaf't are installed in meters. The following directions for initial oiling of the Oil­ tight Jewel Screw are given with reference to Fig. 1: a. Remove the guide bushing by means of the combination jewel-and-pivot wrench. UpperCal jewel assembly b. Invert the screw and allow the jewel-setting plug to drop out. If the plug does not drop out readily, gently tap the head of the screw. c. By means of a wire-loop oil applicator, put two drops of G-E Watthour Meter Jewel Oil in the reservoir of the jewel screw. Allow a short for the oil to run to the bottom of the reservoir. It is necessary that this reserv­ oir under the jewel plug be filled. d. Drop the jewel plug in the screw. e. Replace the guide bushing and screw it down tightly. f. Put in another drop of oil which will run down � through the oil slot of the guide bushing into ....1 the jewel cup. Fig. Open-type ball bearing g. Inspect the oil level, which should be as shown 2. in Fig. 1. Because of minor variations in me­ chanical dimensions of the reservoir or varia­ MAINTENANCE tion in size of the drops obtained from the Bearings The lower bearing may be one of two forms as wire loop, three drops of oil cannot always be follows: taken as the correct amount. If more is need­ a. The oiltight jewel-pivot bearing. ed to fill to the right level, it should be added. b. The open-type ball bearing. The pivots require no lubrication other than that The oiltight jewel-pivot bearing, Fig. 1, consists of obtained from properly oiled jewel screws. a jewel assembled within an adjustable bushing at the The top-bearing assembly should require no atten­ bottom of the meter frame, and a pivot which is tion during the normal life of the meter. screwed into the lower end of the disk shaft. Replacement of Oiltight Jewel-pivot Bearing The open-type ball bearing consists of a ball held 2. At each test period the jewel screw should be re­ between an upper and lower jewel and protected with moved, inspected for oil level, and re-oiled with G-E a sleeve as shown in Fig. 2. Wattthour Meter Jewel Oil if necessary. The upper bearing consists of a guide pin mounted If a meter requires a new lower bearing, both the in an adjustable top-bearing plug and a guide bushing pivot and jewel should be changed. Pivots are in­ set into the tip of theElectricalPartManuals disk shaft. jured by operation in badly worn or damaged jewels. Lubrication of Oiltight Jewel-pivot Bearing 1. The following procedure is recommended for re­ All jewels shipped. from the factory in meters are placement of a pivot and jewel: properly lubricated. Since meters may be stored for indefinite periods before use and since the length of a. Loosen the top-bearing clamping screw so that time between tests is increasing, it is recommended the bearing plug is free to move. that all jewels be examined for proper oil level before b. Remove the jewel screw from its adjustable the meter is placed in service and that General Electric bushing. Do not disturb the setting of this

6

www . ElectricalPartManuals . com I Polyphase Switchboard Watthour Meters GEH764AB

bushing since it is adjusted at the factory to meter frame, as far as it will go. provide proper clearance of the meter disk in g. Should the disk need adjusting for proper the magnet GAP when the jewel screw is clearance in the retarding magnet gap, this c screwed completely into it. may be accomplished by loosening the clamp­ c. Insert the pivot-wrench end of a combination ing screw of the guide bushing and movingcom the jewel-and-pivot wrench through the jewel­ guide bushing and jewel-screw assembly up screw hole. Engage the pivot and unscrew. or down as desired. . d. Replace with a new pivot. h. The top bearing should then be reset by push­ ing the disk of the moving element up against e. Disassemble the jewel screw, replace the the top of the retarding magnet gap a�d the jewel-setting plug with a new one, reassemble electrical driving stator gap, and tightening and re-oil according to instructions given pre­ the top bearing clamping screw. This gives viously. the proper setting for the top bearing, and it f. Assemble the repaired jewel screw, or a new is recommended that this be followed. c ope, screwing it into the adjustable bushing as Register far as it will go. The register dial face may be cleaned by the use of g. Should the disk need adjusting for proper a cloth moistened slightly in water. clearance in the retarding magnet gap, this When replacing a register, carefully inspect the may be accomplished by loosening the clamp­ mesh of its wormwheel with the worm on the disk ing screw of the guide bushing and moving shaft to see that it is approvimately 1/3 to 112 the the guide bushing and jewel-screw assembly length of tooth of the register wormwheel. If not, a up or down as desired. means for its adjustment is provided in the eccentric h. Reset the top bearing by pushing the disk of adjusting screw in the bracket on the back of the regis­ the moving element up against the top of the ter. Avoid meshing too deeply, which might cause retarding magnet gap and the electrical stator friction and effect the accuracy of the meter. gap, and then tightening the top bearing The use of oil on the bearings of watthour meter clamping screw. This gives the proper setting registers is not recommended. for the top bearing, and it is recommended that Refer to separate Instructions for proper care of this be followed. the demand registers used on Types DSM 19, -20, -34, c - Lubrication of Open-type Ball Bearing 3. -35, -38 to -41 incl., -43, and -44 meters. It is recommended that no lubrication be used with Stators this type of meter bearing. In case a potential or current coil is damaged the Replacement of Open-type Ball Bearing entire stator should be replaced. 4. If the meter requires a new jewel, the following TEST CONSTANT procedure, with reference to Fig. 2, is recommended The watthour constant, or the watthours per revo­ for replacement of an open-type ball bearing. lution of the meter disk, is marked on the nameplate or a. Loosen the top bearing clamping screw so that disk. In the case of transformer-rated meters, the Kh the bearing plug is free to move. is the over-all constant for the meter with its trans­ b. Remove the jewel screw from its adjustable formers. The "Test on the nameplate, however, K" bushing. Do not disturb the setting of this is the watthour constant to be used when testing the bushing since it is adjusted at the factory to meter without its transformers. provide proper clearance of the meter disk in TESTING the magnet gap when the jewel screw is All electric central station companies should be screwed completely into it. equipped for periodic meter calibration. One method c: c. Insert the special jewel-assembly wrench, . of making such tests is by the use of a reliable timing No. 4131823, through the jewel-screw hole. device and indicating instruments. Although there Engage the upperElectricalPartManuals jewel assembly and un­ is no question regarding the accuracy of this method, screw. the portable watthour-meter standards manufactured d. Replace upper. jewel assembly. by the General Electric Company provide a means e. Replace lower jewel assembly with a new as­ for testing more quickly, yet accurately and independ­ -\ sembly and ball. Check to insure that sleeve ently of load variations. Instructions for testing watt­ (b) is tight on the jewel screw (d). hour meters accompany each portable standard. Cop­ f. Carefully screw the lower jewel screw into the ies may also be obtained on application to the General c adjustable guide bushing (e) in the watthour Electric Company.

7 www . ElectricalPartManuals . com \

GEH-764AB Polyphase Switchboard WaHhour Meters

OUTLINE AND MOUNTING DIMENSIONS com

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0 tfacross C<><"ofh�• : -=� . ,.&1g:e:' ' -:-{)--� I 1 . I I I Lr . ,• . I _j�f...- '! --A----f--3�I 2 Usczd only in ,1 4-wircz Y u �drill 0.193 diam(�holczs) 3-phase rat·ongs (II hol¢s) ii"drHI(Z holes) &-18thrczad Dimension5 for the DS-19 and DSW-19 is in. Dimension for the DS-34 and DSW-34 is in. 'l�-A 7 For theA DSM-34 the dimension is 7in. Ys (._.._-For-f- the DSM-19 the dimension is in. 8')12 8' H6 Fig. 3. Dimensions and front-view drilling plan Fig. 4. Dimensions for Types DS-34, DSW-34, for Types DS-I9, DSW-I9, and DSM-I9 and DSM-34 See notes I, 2 and 3 below See notes 2 and 3 below

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1- - =�'f'=-\-i -� -Jal----- A - - ---l- 3:...... j L�-�·r irdriii-Zholos� {t'-18thrczads Dimension5 for the DS-20 and DSW-20 is in. Dimension for the DS-35 and DSW-35 is in. For the DSM-20A the dimension is in.7 For the ADSM-35 the dimension is in.7Ys 82)12 8')18 Fig. 5. Dimensions and front-view drilling plan Fig. Dimensions for Types DS-35, DSW-35, 6. for Types DS-20, DSW-20, and DSM-20 and DSM-35 See notes I, 2 and 3 below See notes 2 and 3 below NOTES: 1. WhenElectricalPartManuals Types DS-19, DS-20, etc. meters are mounted on steel panels, using insulating bushings and washers, drill % in. clearance holes for all studs, except the two mounting studs. 2. Contact-device terminals and are furnished for Types DSW-19, -20, and only. K. Y, Z -34, -35 For 25-cycle ratings of Types DSM-19, -20, -34, and -35 above 280 volts (Y voltage for DSM-20 and . two extra terminals and are furnished. -35) K Z .. 3. For Types DSM-19, -20, -34, and -35 the dimensions do not show the reset device on the front of the cover, which protrudes out 7:l in. or % in., depending on the type of demand register.

8 www . ElectricalPartManuals . com i. Polyphase Switchboard WaHhour Meters GEH764A8

OUTLINE AND MOUNTING DIMENSIONS com .

.1. !i I1--:--5!-- ...J Fig. Dimensions for Types DS-38, DSW-38, Fig. 8. 7. and DSM-38 See notes and 3 below 2

osw� 41 only c

Fig. 9. Dimensions for Types DS-40, DSW-40, Fig. 10. Dimensions for Types DS-41, DSW-41, and DSM-40 and DSM-41 See notes 1, 2 and 3 below See notes 1, 2 and 3 below

NOTES: 1. When Types DS-40, DS-41, etc., meters are mounted on steel panels, using insulating bushings and washers,ElectricalPartManuals drill H in. clearance holes for all stud *Textolite projection whether or not studs are used at that location. Drill H in. clearance holes for the four mountmg studs. 2. Contact-device terminals and are turnished for Types and only. K, Y, Z DSW-38, -39, -40, -41 For 25-cycle ratings of T es and above 280 volts (Y voltage for and . yp DSM-38, -39, -40, -41 DSM-39 -41) two extra termin� and are furnished. K Z 3. For Types DSM-38, and -39, the dimensions do not show the reset device on the front of the cover, wh1ch protrudes out 72 in. or %'in., depending on the type of demand register.

* Reg. U.S. Pat. Off. c

9 www . ElectricalPartManuals . com GEH�764AB Polyphase Switchboard Watthour Meters

DSM-43 ONLY com SURFACE MTG 7" 8 .

3 5 I 7 9 0 0 0 0 02� 4 0 08 0 6 10 . NUMBERING OF ST UDS /-+---- 19" (FRONT VIEW) 532

CASE

VIEW SHOWING ASSEMBLY OF HARDWARE FOR SURFACE MTG ON STEEL PANELS

PANEL DRILLING FOR SEMI-FLUSH MOUNTING (FRONT VIEW) ElectricalPartManuals . Dimensions for TypesDS-43, DSW-43, Fig. 11. and DSM-43

0

10 www . ElectricalPartManuals . com Polyphase Switchboard Watthour Meters GEH764AB

DSM-44 ONLY com 5" 13 15 17 19 1--- 68- II ------jG . 0000 0 I T I 00000 I I 12 14 16 18 20 I 1 I I I I I I I I I . . I I I I I I I .fl. f-. l I I I l 5" I 20 I 16 I I

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CASE c

VIEW SHOWING ASSEMBLY OF HARDWARE FOR SURFACE MTG ON STEEL PANELS

PANEL DRILLING FOR SEMI-FLUSH MOUNTING c (FRON T VIEW) ElectricalPartManuals

Fig. Dimensions for Types DS-44, DSW-44, . 12. and DSM-44

11 www . ElectricalPartManuals . com GEH-764A8 Polyphase Switchboard WaHhour Meters

com SCHEMATIC CONNECTION DIAGRAMS . -�·--l rr;· !-· I . . L_j--- �-! : � I �---, .I �.SF� '-- . . I I I . I� --·. I I I. ll��� I I I. I I ��=ri-L . = · r? ! I fQI;;">\I Pot&ntial indiutinq ���I tamp$ : i L:::¥I rrF·-rr--=-� I r;;�� :x. 0=1:\ . .. . � L"-'"'--''-=.Tj___ _J , I D I r-·� . �, I. �r+-h_ . J i I 1 I . L i..--ooL.i_ . I �� I � 1 �--'� � Auxiliary �__· ___ __ windinq . _j '----!: . -- (a)L Types DS-19 and DS-34, (b) Types� DS-20 and DS-35,_j Types DS-19, DS-34, (b) Types DS-20, DS-35, 3-wire, 2- and 3-phase, 4-wire, 3-phase (a) DS-38, and DS-40 DS-39, and DS-41 and 4-wire, 2-phase Fig. 13. Internal connections (front views) Fig. 14. Showing connections of.open potential circuit indicating lamps to auxiliary potential windings (front views)

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load load With Current Transformers With Current and Potential Transformers

For 3-wire, 2-phase circuits, wire should be the common return. NOTE: "A" For 3-wire single-phase circuits, wire should be the neutral. ElectricalPartManuals"A" Fig. 15. Connections for Types DS-19 and DS-34, 3-wire, single-, or 3-phase (back views) . 2-,

12 ·�. www . ElectricalPartManuals . com Polyphase Switchboard WaHhour Meters GEH764A8

SCHEMATIC CONNECTION DIAGRAMS

Source IS1Source A] 81A1 ll1 com � 81 At Fuses .

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Load Lollid With Current Transformers With Current and Potential Transformers Fig. 16. Connections for Types DS-19 and DS-34, 4-wire, 2-phase (back views)

Sourc• N 3 2 1 Baek view

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.. c Currant tref'lafom'lcr L_�_j

Loed Load With Current Transformers With Current and Potential Transformers Fig. 17. Connections for Types DS-19 and DS-34 for 4-wire Y, 3-phase circuits (back views)

Source N 3 2 1

,-6-l I I �� � :--! c ��. 1 Current L I Transformer 1 I " �--+- ElectricalPartManualsI I I i _j Load L�_ L�_j LOed . With Current Transformers With Current and Potential Transformers Fig. 18. Connections for Types DS-20 and DS-35, 4-wire Y, 3-phase (back views)

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