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GENERAL
Polyphase Switc. h board
ltatt ... our Meters
•,
TYPES
DS-19, DSW-19, DSM�19, DS-20, DSW-20
DSM-20, DS-341 DSW-341 DSM-341 DS-35
DSW-351 DSM-35, DS-381 DSW-381 DSM-38
DS-39
DSW · - 39:· DSM-39
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DSW-4
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DS-40
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W-41, DSM-411 DS-4 3
DSW-441 DSM-44
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ELECTRIC
GEH-764AB
SupiJf'sedes GEH-764AA
DSM-40
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Related Manuals for GE DS-19
Summary of Contents for GE DS-19
- Page 1 GEH-764AB SupiJf'sedes GEH-764AA Polyphase Switc. h board ltatt ... our Meters -.:-.. •, TYPES DS-19, DSW-19, DSM�19, DS-20, DSW-20 DSM-20, DS-341 DSW-341 DSM-341 DS-35 DSW-351 DSM-35, DS-381 DSW-381 DSM-38 DS-39 DSW · - 39:· DSM-39 DS-40 DSM-40 DSW-4 W-41, DSM-411 DS-4 3...
- Page 2 • 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 (Semifl u sh Mount DS-35, DSW-35, DSM-35 (Semifl u sh Mount ing) ing) DS-38, DSW-38, DSM-38 (Drawout, Semi...
- Page 3 POLYPHASE SWITCHBOARD WATTHOUR METERS next inserted completing the electric circuits through The Types DS-19, DS-34, D S-38, DS-40, and DS-43 the meter and locking the latch on the cradle. meters are back-connected, switchboard, two-stator, polyphase meters. The DS-20, DS-35, D S-39, DS-41, cover is drawn to the case by four thumb-screws, and DS-44 are the corresponding three-stator meters.
- Page 4 GEH-764AB Polyphase Switchboard Watthour Meters recess in the meter base properly. The sealing screws auxiliary winding connected to these lamps as illust rated in Fig. 14. should not be tightened any more than necessary to METERS FOR USE WITH CURRENT produce a slight compression of the felt gasket in the TRANSFORMERS recess in the meter base.
- Page 5 GEH7 64A8 Polyphase Switchboard Watthour Meters same direction, then tighten the lock nut. Turning The effect of light-load adjustment varies inversely 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.
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Page 6: Maintenance
GEH-764AB Polyphase Switchboard WaHhour Meters ing the meter register from right to left. Watthour Meter Jewel Oil be added, if required, to The test constant marked on the nameplate or disk raise it to the level indicated in Fig. 1. It is not al... - Page 7 GEH764AB Polyphase Switchboard Watthour Meters 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 screwed completely into it.
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Page 8: Outline And Mounting Dimensions
See notes I, 2 and 3 below See notes 2 and 3 below NOTES: When 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. -34, K. - Page 9 GEH764A8 Polyphase Switchboard WaHhour Meters OUTLINE AND MOUNTING DIMENSIONS 1--:--5!--...J Fig. Dimensions for Types DS-38, DSW-38, Fig. 8. and DSM-38 See notes and 3 below osw� only 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...
- Page 10 GEH�764AB Polyphase Switchboard Watthour Meters DSM-43 ONLY SURFACE 7 " � 19 " NUMBERING OF ST UDS (FRONT VIEW) CASE VIEW SHOWING ASSEMBLY OF HARDWARE FOR SURFACE MTG ON STEEL PANELS PANEL DRILLING FOR SEMI-FLUSH MOUNTING (FRONT VIEW) Fig. 11. Dimensions for Types DS-43, DSW-43, and DSM-43...
- Page 12 With Current and Potential Transformers NOTE: "A" For 3-wire, 2-phase circuits, wire should be the common return. "A" For 3-wire single-phase circuits, wire should be the neutral. Connections for Types DS-19 and DS-34, 3-wire, single-, or 3-phase (back views) Fig. 15.
- Page 13 Baek view 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 Current Transformer L�_j L� LOed...
- Page 14 GEH-764AB PC?Iyphase Switchboard Watthour Meters SCHEMATIC CONNECTION DIAGRAMS Source Source 3 2 1 Fuses H1 F!··--- - ---- - , -----------, - "',. Short c1rcuitin g circuitin g Load Load With Current and Potential Transformers With Current and Potential Transformers Fig.
- Page 16 -� .. � ..� "' .."' � "' "'I .."' '"%j ..� ..t"' "' t::) '"i "' � � .."' c;') "' :5£!!' HOn:.2 ..� ""'""" - """" "' � �� �p �...
- Page 17 �-·· · -�-······ · ·····-·· GEH·1753C INSTRUCTIONS TIME ��· · OVER CURRENT RELAYS Types IACSlA IACSlC IACSlB �. · IACSlD IACSlR .IAC52A IACS2B • G E N R A L E L E C T R )I C...
- Page 19 TIME OVERCURRENT RELAYS TYPE lAC INTRODUCTION Outline Contact lnstant .. ne- Induction lntern,il 'ftitl Type Circuits ous Unit Unit Panel Unit Connection I� Drilling IAC51A ( - )A Fig. 11 Fig. IAC51B ( - )A Fig. U Fig. !AC51C Ye;; Fig.
- Page 20 Time Overcurrent Relays Type 7. 0 '+.0 � J . O ..� ' . 0 , 5 1 .5 � MULTIPLES OF loiiNIIoiUiol CLOSING CURREN T l AC Fig. Time-current Curves Type Re lays �ith Inverse-time Lharacteristics...
- Page 21 Time Overcurrent Felays Type lAC INDUCTION UNIT The 2-ampere tap has a d-e resistance of 0.13 INTRODUCTION ohms and a 60 cycle impedance of 0,53 ohms while the 0.2-ampere tap has a 7 ohm d-e resistance and The induction unit is the basic unit in all lAC a 52 ohm 60 cycle impedance.
- Page 23 ·I Time Overcurrent Relays Type lAC DEVICE FUNCTION NUMBERS FOR USE WITH ALL EXTERNAL DIAGRAMS Instantaneous E lement ::I" 51 - Overcurrent, Relay, Type lAC . · 51N- Ground Overcurrent Relay, Type lAC - Power Circuit Breaker SI - Seal-in Unit, with Target TC - Trip Coil - Auxiliary contact, closed when breaker closes.
- Page 24 Type lAC Time Overcurrent Relays INSTANTANEOUS ELEM ENT mounted beside the adjustable pole piece. Time t NTR ODUCTION current characteristics are showJl in Fig. 10. The instantaneous element is a small instan taneous hinge -type element which may be mounted RATIN GS on the right front side of the induction unit (See Fig.
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Page 26: Receiving, Handling And Storage
Time Overcurrent Relays Type lAC current relays. The REA l l B is not mounted inside .-.. AP PLICATION the lAC case. The a -c tripping element is used in Type lAC relays where a r e i a b l e direct -current tripping BURDENS source is not available and it is necessary to trip the Burdens of the REA element are given in the... - Page 27 Time Overcurrent Relays Type I N D U C T i O N u� ; r ..<0 "" <0 ;;I" • SnORT F I NC(R F i g . I ll I n te rn a l Con nect i on s for the Type F i g , I n ternal Conn ec t i on s for t h e T�e I ACS I D Re l ay F ron t V i ew...
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Page 28: Installation
Time Overcurrent Relays Type lAC V A R I A B L E R E S i S T A N C E O R L O A D B O X � ---- 1 1 5 V O L T S R A T E D F R E Q U E N C Y S Y N C H R O N O U S T I M E R... -
Page 29: Time Setting
Time Overcurrent Relays Type lAC The current tap setting is found by dividing the tap plug firmly into the tap marked for the desired minimum primary tripping current by the current current (below which the unit is not to operate) . transformer ratio. - Page 31 Type lAC Time Overcurrent Relays � �· . SEll I -F LIJSH PANEL LOCAT I ON SURFACE IITG. IITG. "' 10-32 3 / B IITG. SCREW STUD NUIIBU I IIG STUD NUMBER I NG CASE FRONT V I EW 0RONT V I EW F I G .
- Page 32 ) Time Overcurrent Relays Type lAC � � fi -tS ST UD S MTG. ltll<o I� .:=:3 : I0 -32-t MTG. NUMBERING OF STUDS SCREW OUTLINE ( FRONT V IEW ) PANEL ', ;:,.· VIEW SHOWING A SSEMBLY O F HARDWARE FOR SURFACE MTG.