Related Manuals for GE JBCG51M
Summary of Contents for GE JBCG51M
- Page 1 GEK-49849F INSTRUCTIONS GROUND DIRECTIONAL OVERCURRENT RELAYS JBCG51M JBCG52M TYPES: JBCG51M(-) Y1A JBCG53M JBCG54M JBCG53M(- ) Y1A JBCG77M JBCG78M GE Protection and Control 205 Great Valley Parkway Malvern, PA 19355-1337...
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O V ERCURR ENT R ELAYS G R O UN D DIR ECTIO N AL O V E R C U R R E N T R EL A YS JBCG51M JBCG52M TYP ES: JBCG5 1M (- ) Y 1A... - Page 4 Inverse t i me rel ays sho u l d be used o n systems where the f au l t c u rrent f l owi n g through a g i ven re l ay i s i nf l uenced l ar ge l y by the system generat i ng c apac i ty at the t i me of the f au l t .
- Page 5 G EK - 49849 The cho i ce betwee n very i nver s e and extreme l y i nver s e t i me re ays i s more i ke i m i ted t h an between them and the i nver s e t i me re ay as they are more n ear i n t h e i r t i me-current character i s t i c curves .
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G EK-49849 RATIN GS The J BC G rel ays descri bed i n thi s i n struct i o n book are avai l abl e i n 50 and 60 hertz mode l s . The TOC t i me overcurrent u n i ts have extended e i g ht-to-one... -
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G EK-49849 TABL E 4 CONTINUOUS RATING OF 1 . 5- 12 . 0 AMP TOC UNIT 1 5 12 0 A MODEL 1 . 5 . 2 . 0 2 . 5 3 . 0 ' 4 . 0 5. - Page 8 GEK-49849 DIRECTI ONAL UNI T The d i rect i on a l u n i t operat i ng co i l , rel ay term i n a l s 5 and 6, h as a s i x ampere cont i nuous rat i ng and a 200 ampere one seco n d r at i n g .
- Page 9 G EK-49849 TABL E 8 SEAL-IN UNIT RATINGS 0. 2 2. 0 0. 6 2. 0 DC Res i st ance +10% 8. 3 0. 24 0. 78 0. 18 2. 0 Mi n i mum OperatTn g, ( + ) 0 ( - ) 40% 0.
- Page 10 GE K-49849 For the same operat i ng cond i t i ons, the relay w i ll operate repeatedly w i th i n one or two percent of t he same t i me. The t i me curves for the d i rect i onally controlled IOC un i t s are s hown i n F i g.
- Page 11 G EK-49849 TABLE 10 BURDENS OF OVERCURRENT UNI TS (TI ME AND I NSTANTANEOUS) A T 50 CYCLES BURDEN OHMS THREE RANGE BURDENS AT M I NI MUM P I CKUP TI MES "IVA T I ME UNI T MI NI MUM TAP OF TOC UNI T M I N .
- Page 12 GEK-49849 TABLE 10 ( Co n t i nued) BUR DEN OHMS THREE "!VA RANGE BURDENS AT MINIMUM P ICKUP TIMES AT 5 TIME IOC UNIT MINIMUM TAP OF TOC UNIT MIN. MIN . CHAR1C UNIT UNIT CONNECTIONS + VA P .
- Page 13 G EK-49849 TAB LE B UR DEN OF NON- D I RECTIONALLY CONTROLLED I NS TANTA NEOUS UNIT I N S T. BUR DEN A T M I NIMUM BUR DEN OHMS \Z) M I N I MUM UNI T RANGE P I CKUP P I CKUP (OHMS)
- Page 14 G EK-49849 i nner face of the stat i onary contact brush ret ai ner ( H ) . The stat i on ary contact support (K ) and the cont act d i al are as sembled together by means of a mount i ng s crew ( L ) and two l ock- n ut s ( M ) .
- Page 15 G EK-49849 TARGET AND S EAL- I N UNI TS The seal - i n un i ts for both the TOC and I OC contacts of the JBCG51M-52M, JBCG53M- 54M and JBCG7 7M- 78M r e l ays are mounted on the I OC m i dd l e un i t .
- Page 16 G EK-49849 R EC EI VIN G, HANDLIN G AND ST ORA G E Thes e relays, when n o t i ncluded a s part o f a control pane b e shi p ped i n cartons des i gned to protect them ag ai nst damage . Immedi ately upo n rece i pt of a relay, ex ami ne i t for any d amage s ust a i ned i n trans i t .
- Page 17 GEK-49849 M i dd l e U n i t (TOC) The d i s k s h aft end play shou l d be 0. 005-0. 015 i nch. The d i sk s hou l d be centered i n the ai r gaps of both the e l ect rom agn et and drag magnet.
- Page 18 GEK-49849 TARGET AND SEAL- IN UNIT The t arget an d seal - i n un i t has an operat i ng c o i l t apped at 0 . 2 and 2 . 0 amperes or 0 . 6 and 2 . 0 amperes. Whe n us e d wi th tr i p coi l s operat i ng on currents rangi ng from 0 .
- Page 19 GEK-49849 Wi th the contacts ju s t c l os i ng at No . 0 t i me sett i ng, there shou l d be suff i c i ent gap between the stat i on ary con tact bru s h an d i t s meta back i ng str i p to e n s ure approx i mate l y 1 /32 i nch w i p e .
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Page 20: Jbcg51
GEK-49849 The primary adjustment for the time of operation of the unit is made by means of the time dial . However, further adjustment is obtained by moving the permanent magnet along its supporting shelf; moving the magnet toward the disk shaft decreases the time, while moving it away increases the time . - Page 21 GEK-49849 I NSTANTANEOUS OVERCURRENT UNI T (D I R ECTIONALLY CONTROLLED) The pickup of the in stantaneou s overcurrent unit can be adju sted over an eight-to- one r ange, as indicated in T ab l e 6, by varying the ten sion of the spir a l control sprin g a n d by sel ection o f the appropriate series o r p ar a l l e l connection s .
- Page 22 GEK-49849 CONNECTIONS The internal connection diagrams for the various relays are shown in Fig. 5 to 7. Typical wiring diagrams are shown by Fig. 8 and Unless mounted on a steel panel which adequately grounds the relay case, it is recommended that the case be grounded through a mounting stud or screw with a conductor not less than #12 B&S gage copper wire or its equivalent.
- Page 23 GEK-49849 I NSTANTANEOUS OVER CURRENT UNI T C heck p i ckup setti ng; see ACCEPTANCE TESTS . I NSTANTANEOUS UNIT Sel ect the des i red r ange by mak i ng the proper connect i on s at the rear of the rel ay see i ntern a l connect i ons d i agr am When ever poss i bl e al ways sel ect...
- Page 24 GEK-49849 I NSTANTANEOUS UNI T ( NON- D I R ECTI ONALLY CONTROLLED ) C heck t hat the i n s tantaneous u n i t p i ck s up at the des i re d c u rrent l eve l , as out l i ne d ' e1 n the ACCEPTANC E TESTS and the I NSTALLAT I ON TEST s ect i on s .
- Page 25 GEK-49849 be wi thi n the l i m i t s 1 . 88 t o 2 . 1 2 amp s . I f the d i sk moves at the l ower l i m i t, c heck that movement i s n ot over one-hal f i nch, meas ured a l ong the per i phery of the d i sk .
- Page 26 GEK-49849 that o n e-t o-two grams of press ure are requ i red at the con tact t i p i n order to cause the end of the b r u s h to separate from the i n ner f ace of i t s respect i ve b r u s h ret a i ner . Adjust the s p i r a l s pr i n g u n t i l the mo vi n g cont act arm i s i n a neut r a l pos i t i on , i .
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Page 27: Table
GEK-49849 the c l utch pre s sure and, consequent l y, the current va l u e whi ch wi l l c ause the c l utch to s i p . Note that too frequent or too o n g app i c at i o n of these currents wi overhe at the coi l s . - Page 28 GEK-49849 INSTANTANEOUS UNIT (NON-DIRECTIONALLY CONTROLLED) Both contacts should cl ose at the same time . The backing strip shoul d be so formed that the forked end (front) bears against the molded strip under the armature . With the armature against the pol e piece, the cross member of the spring should be in a horizontal pl ane and there should be at least 1 /64 inch wipe on the contacts .
- Page 29 GEK-49849 F i g . 1 ( 8043474 ) Typ e JBCG5 1M ( - ) Y 1A R e l ay i n C ase ( F ront Vi ew)
- Page 31 GEK-49849 F i g . 3 ( 8043476 ) Type JBCG51 M ( - ) Y1A R e l ay Out of C ase ( Re ar V i ew)
- Page 32 GEK-49849 L A T E R " F i g . 4 Type JBCG77M R e l ay Out of C ase ( R ear Vi ew)
- Page 35 GEK-4984 9 J U M P E R R E D L E A DS TO C W O U N D S. H AO l N G C O I L S I O C 1 o c T O C P O T.
- Page 37 GEK-49849 PHASE SECUEltt 1�-.3 0.1 � ..P O T E N T I A L -6 7 N· �NECT A POUR t ZATfOlt I S USED, FOTEnTtAl TO .0 A B TO C. USD>, POLAR I ZAT f OM IS ·t;OT TRANSFORMER CO!t �CT C T O 0 N E UTRAL...
- Page 38 GEK-49849 P O T E N T I A L AR I Z E G R O U N D F A U LT � (J "' � 1 . 2 - I- "- "' f => <I> l . 0 •...
- Page 39 GEK-49849 g § 8 1 8 8 1! • � � .., ., _ 1 • • 1 50 80 70 8090 ° 8 1 0 1 000 !'XTf�UO RWc t ( BOG :' f F i F � ) �,Tt�_EHlL ·...
- Page 40 GEK-49849 I I ! I I I I I I II • • • 1 10 101 I I 7 I Ill .I .I ..7 • -------- - -- rxm: c E c R��u ( 8CO ::FP. I E�) A D J U STI�...
- Page 41 GEK-49849 I 7 I 1 1 0 50 80 70 10 10 ° 1010 EXTE�' CEC P�NH ( 800 � f t. I ES } ·- ·-·-- 40 0 R AT I H G S ADJ USTMENTS 30 0 T I �\ E UN I T I �...
- Page 42 GEK- 4 9 8 4 9 • • ----+---- - · - ____ .._ __ __ _._ _ _ _ � .,..� -- -- -t-- _ _ _ <C 6roo · - · -· � · - j n.
- Page 44 SE I I NSTAHTANEOOS TRAHSI OVERREA<ll 8 A 8 6 9 � t C ' RATED 0 2 0 OV E RRE ACH = ..[ Y J 1 00 ·(lJRRENT GRAWALL P ERC E NT .., CURRENT PftkUP APPL...
- Page 45 GEK-49849 Mo v i ng C on t a c t Arm - B u tton C o n t a c t T i p G - Mo v i ng Con ta c t B r u s h Re ta i n e r Mo v i n g C o n ta c t B r u s h --- A K - S t a t i o n a ry Con t a c t Sup port...
- Page 46 GEK-49849 T U B E A - I N C L I N E D 0 - S PA C E R E - C A P L E S S ST E E L B A L L STA J F- F LA T C O N TA C T S P I R A L S P R I N G...
- Page 47 GEK- 49849 C O N N EC T I N G P L U G M A I N B R U S H C O N N E CT I N G B LO C K A U X I L I A R Y T E R M I N A L B LO C K S H O R T I N G B E F O R E E N G A G I N G T H E M A I N...
- Page 48 GEK-49849 • • • • • • • • • 1 20V . RATED FREQ. TYPE X LA13 TEST PLUG TO T I MER " STO P " ADJ . RES. • • • • • • • TY PE X LA13 TEST PLUG TO T I ME R "...
- Page 49 GEK-49849 • • • • 120V • • • • • X LA13 RATED FREQ . TY PE TEST PLUG • • • • TY PE X LA13 TEST PLUG F i g . 22 ( 0 178A9037-0 ) Test Connect i on s for C heck i ng P i ck u p of D i r ect i on a l U n i t U s i ng Current P o l ar i z at i on...
- Page 50 GEK-49849 • • • • • • • • • TYPE X LA13 TEST PLUG RES . • • • • • TYPE X LA13 TEST PLUG F i g . 23 ( 01 78A9038 - 0 ) Test Con nect i on s for C heck i ng P i ck u p of D i rect i on a l Un i t U s i ng Poten t i a l P o l ar i z at i on...
- Page 51 GEK-4 984 9 • • • • • • • • • • 120V@ RATED FREQ . TYPE X LA13 T EST PLUG • • • • • • • • TYPE X LA13 T EST PLUG RE LAY TYPE CO N N ECT ..
- Page 52 GEK-49849 5 1 1 6 - 1 8 < 4 > S T U D S F O R S U R F A C E M T G . 0 0 0 0 0 1 9 1 7 1 5 1 3 1 1 0 0 0 0 0 2 0 1 8 1 6 1 4 1 2 1 9 .
- Page 56 Protection and Con trol GE Te chnology Center 205 Great Va l l ey Parkway (4/ 93 ) Malvern, Pennsylvania 1 9 355- 1 33 7 (4 / 92) ( 7 / 89 ) 6 / 85 1 1 / 81...