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GE IFC95AD Instruction Manual

Time overcurrent relays
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INSTRUCTIONS
GEK-49950A
Su persed es GEK -49950
TIME OVERCURRENT RELAYS
TYPES
IFC95AD AND IFC95BD
f)
GENERAL
ELECTRIC
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Summary of Contents for GE IFC95AD

  • Page 1 INSTRUCTIONS GEK-49950A Su persed es GEK -49950 TIME OVERCURRENT RELAYS TYPES IFC95AD AND IFC95BD GENERAL ELECTRIC...

  • Page 2: Table Of Contents

    ......... . . Hi gh -Seismi c Tar ge t a nd Seal- I n U nit .

  • Page 3: Description

    GEK-49950 TIME OVERCURRENT RELAYS TYPES IFC95AD AND •fC95BD DESCRIPTION The Type IF C95AD relay is an extended-range, sing le-phase, time overcu rrent rel ay h av i n g a short i nverse-ti me ch a racteristic. T h e IF C95 B D i s s i m i l a r ex cept that it a lso i n cl ud es a h i nged-a rmatu re i n sta nta neous- overcu rrent u n it.

  • Page 4: Ratings

    GEK-49950 The d rawo ut co n n ectio n/test system fo r the C 1 case, sho w n i n F ig u re 1 4, h as p ro visio ns fo r 1 4 co n n ectio n po i nts, and a visib l e cu rre nt transfo rmer ( CT) sho rti ng b a r located u p f ro nt. As the co n nectio n p l u g is w ithd raw n, it clears the sho rter co ntact f i ngers i n th e o utput co ntact c i rcu its f i rst.
  • Page 5 GEK-49950 TABLE I Relay Freq uency Cu rrent R a n g es ( H e rtz) (A mperes) & 50 a n d 60 I FC95A D 0. 5- 4.0 1.0- 1 2.0 A vai l ab le ta ps f o r the ti me-ove rcu rrent u nit are show n in Tabl e I I. TABLE I I Ra nge Taps A vai l abl e...

  • Page 6: High-Se I S M I C In Stantaneou S Un It

    GEK-49950 TABLE V 1.0 - 1 2.0 A M PE RE RANGE SETI ING S I FC95 M od el 1 0.0 1 2.0 2. 5 Cont i nu ous 7. 5 1 2. 5 4. 5 5. 5 1 0.9 Curre nt HIGH-SE I S M I C IN STANTANEOU S UN IT The i nsta nta neous coil is tapp ed for op erat ion on eit h er one of t w o ra n g es (H or L ).

  • Page 7: H Igh- Se I Sm I C Target And Seal- In Un It

    GEK-49950 H IGH- SE I SM I C TARGET AND SEAL- IN UN IT Rati ngs for the target and sea l-in u n it a re show n i n T abl e V I I. TABLE V I I RATING S PARAMETER DC Resistance, o h ms ( 0.2 4...

  • Page 8: Characteristics

    GEK-49950 TABLE V I I I Burdens at Minimum Burdens in Ohms Min. Times Pickup Range Pickup, Minimum Tap Model Amps 9.96 6.13 6.30 24.20 2S.OO 21.30 O.S - 4.0 2.SS 1.09 1.49 6.09 6.27 S. 44 1.0 - 12.0 IFC9S 17.7S 8.30...

  • Page 9: Operati N G-Time Accu Ra Cy

    GEK-49950 Ex ampl e: Th e tw o amp ( 2 A) tap fo r a 1-to-1 2 I FC95 tim e-overcu rrent rel ay requ i res o n e m ovabl e l ead i n p osition C and th e oth e r i n p osition L. ±...

  • Page 10: Acceptance Tests

    GEK-49950 ACCEPTANCE TESTS I m med i atel y u pon recei pt of the rel a y an IN SPE CTI ON AND A CCE PTAN CE TE ST sh oul d b e made to mak e su re that n o damage has b een susta i ned i n s h i pment and that the rel ay cal ib rat i o n s h a ve n ot b ee n d i stu rb ed.

  • Page 11: Powe R Requ I Re Ments, Gene Ral

    GEK-49950 POWE R REQU I RE MENTS, GENE RAL All d evices o perated on alternating cu rrent { AC} a re affected b y freq u e n cy. A n o n­ si n u soidal w avefo rm can b e analyzed as a fundamental freq u ency pl us h a rm o n ics of that fu n d a mental freq u ency.

  • Page 12: Time Test

    GEK-49950 T i me T est * Set the rel ay at the nu mb e r 1 0 time- d i a l setting and the l ow est ta p. Usi n g the test con nection i n Figu re 1 1 a pp ly ten ( 1 0) ti mes tap cu rrent to the r e l ay. T h e rel ay o pe rati n g t i m e t o cl ose its contact is l isted i n T ab le X.

  • Page 13: Pick Up And D Ropout Test

    GEK-49950 Con n ect relay studs 1 and 2 (see the tes� ci rcuit of F i g u re 1 3) to a DC so u rce, ammeter, and load b ox so that the cu rrent can be control l ed over a ra n g e of 0. 1 to 2.0 a m peres.

  • Page 14: Time -Over Curre Nt U Nit

    GEK-49950 M ak e su re that the ta p screw is in the desi red ta p. Pe rf orm picku p and d rop- out tests as outl i ned i n the section. ACCEPTANCE TESTS Sel ect the d esi red ra nge by setting the l i nk in the p roper positi on. { See Figu re 1 and th e i nternal -co n n ections d i a g ram.) W h enever possibl e, sel ect the h i g h e r ra n g e si nce i t has a h i g her conti nu ous rating.

  • Page 15: Conta Ct C Lean Ing

    GEK-49950 C ON TACT CLEAN ING For cl eanin g r e l ay contacts, a flexib l e b urni sh in g to ol shou ld b e used. Thi s consi sts of a fl exib l e str i p of meta l with an etch-r oughen ed sur face r esemb lin g in effect a su per fin e fi l e. The polishin g acti on i s so d e li cate that n o scr atches ar e l eft, yet it wi l l c l e an off an y corr osi on thor o u g h ly an d r a pi d ly.

  • Page 16: Time Tests

    GEK-49950 W ith the ta p bl ock set for the l ow est ta p an d the time d i al set w h ere con tacts a re j ust open, adj ust the control sprin g to j ust cl ose the contacts w ith in the l i m its g i ven b el ow. These l i m its a re±...
  • Page 17 GEK-49950 Mechanica l Adj ustments The di sk does n ot have to b e in the ex act center of eit her ai r g a p for the relay to perfo rm correctly. Shou ld the disk n ot clear a l l g a ps, the fol l owin g adj ustment can be made. Dete rmin e w hi c h w ay the disk must be a li gn ed to clear a l l su rfaces b y 0.

  • Page 18: Mechanical Adju Stments

    GEK-49950 H IGH -SE I S M IC T A RGET AN D SEA L- IN UN IT T he l eft cont act must mak e b efor e t h e r i g ht cont act does. T o check t h e w i pe of t h e seal -in un it , insert a feel er gage b etw een t h e r esi d u al b utt on of t he ar mat ur e and t h e fr ont en d of t h e pol e piece.
  • Page 19 GEK-49950 LIST OF FIGURES FIGU RE P AGE Type I FC 9 5B D Relay, Removed from C ase, Front V i ew ....Ty pe I FC 9 5B D Rel ay, Removed from C ase, Rear V i ew ....Intern a l C onn ection s fo r Relay Type I FC 9 5AD, Front V iew .
  • Page 23 GEK-49950 I IIIIUII I 11!111 JIll 1110 1100 "' "' ..
  • Page 24 GEK-49950 � 7 8 9 �or ° 70 1010 iOOO " " "" - �t - "' 0 .. "' 2: ,. ;::: •
  • Page 25 GEK-49950 A L A R M < + ) <+ J BU S D C T R I P B U S S O N 5 0 N --cr- A L A R M R E M OT E I N DI CAT I O N N OT E : DEV I C E P R F S E N T O N LY I N "...
  • Page 26 GEK-49950 � Q. - - :X:: - 9 � X '-' � � - � • <.) � � - - � w :z: u v.> - - · � Q_ "' :::r � � g. :
  • Page 28 GEK-49950 R E L 1'. Y C C I L R E L_ � V G O I L C I R C U I T N O T I N C I r·, C U I T - R E L A Y T E R �l i N A L R F L A Y R E L A Y...
  • Page 31 GEK-49950 V A R l f.I. B L E R E S I S T O R D . C . V O L T S R E L AY T E R M I N A L S R E L A Y S I D E - - - C A S E...
  • Page 32 GEK-49950 DRAWO U T E L EM E N T C O N N E CT I O N PL U G C O N TACT F I N G E RS SUPPORT STR U CT U R E N E CTI O N B L O C K F i g ur e 14 (80427 1 5) Cr oss Section of I FC Dr aw- Out C ase, Show in g Shortin g B ar...
  • Page 33 GEK-49950 5 S 6 2 1 4 1 MM ·- 3.0 6 2 7 8 M M 6 . 1 2 4 7.376 M� 1 8 7 �� 1 5 6 3.6 8 8 9 4 M M � 3.0 31 S T U D 7 7M M 7 1 MM...
  • Page 36 .. . " Meter and Control 5/ 89 Business Department General Electric Company 205 Great Valley Parkway Malvern, PA 19355...

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Ifc95bd

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