Rece I V I Ng, Handling And S Torage; Acceptance Tests - GE JBC51M Instructions Manual

Phase directional overcurrent relays

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Fi g . 2 1 s hows a typi cal tel e phone rel ay type auxi l i a ry un i t used i n JBC rel a ys

to contro l the t i me ove rcurrent un i t .

i ts o pera t i n g co i l c i rcui t a s i t pi c ks up by o pen i n g i ts n o rma l l y c l o s ed contact

whi ch i s acros s a s er i es res i s to r ( s ee R4 i n F i gs . 7 a n d 9 ) .

pi ckup a n d d ro pout wi th a conti nuousl y rated aux i l i a ry c i rcui t .

These rel ays, when not i ncl uded as pa rt of a control panel , w i l l be s h i p ped i n

ca rton s d e s i gned to protect them a ga i n s t dama ge .

rel ay, exam i n e i t for any dama ge sus t a i ned i n tra n s i t .

resul ti n g from rough handl i n g i s e v i dent, fi l e a damage cl a i m a t once w i th the

trans porta ti on com pany and

O ffi ce .

Rea s o n a bl e ca re s houl d be exerc i sed i n un packi n g the rel ay i n order that none

of the parts a re i njured o r the a djus tmen ts d i s turbed .

I f the rel ays are not to be i ns ta l l ed i mmed i atel y, t hey s houl d be s tored i n

the i r o r i gi nal c a rtons i n a pl ace that i s free from m o i s ture, dust a n d metal l i c

c h i ps .

Fore i gn matter col l ected on the outs i de o f the ca s e may f i nd i ts way i ns i de

when the cover i s removed a nd cause t roubl e i n the o pera t i o n o f the rel a y .

I mmed i atel y upon rece i pt o f the rel ay a n i ns pe c t i o n a n d a c ce ptance test s houl d

be made to ensure that no dama ge ha s been susta i ned i n s h i pment and that the rel ay

cal i brati o n s have not been d i s turbed .

readjus tment i s neces s ary, refer to the secti on on S ERV I C ING .

These tests may be perfo rmed a s part o f the i nstal l a t i o n o r acce ptance tests a t

the d i s cret i on o f the user .

S i nce mos t o perat i n g compa n i es use d i fferent procedures for acce ptance and

i nstal l a t i o n tes ts, the fol l ow i ng secti o n i ncl udes a l l appl i ca bl e tes ts that may be

per formed o n these rel ays.

V I S UAL I NS P E CT I ON

C heck the n amepl ate s tampi ng to make sure that the model number and rati n g o f

t h e rel ay a gree wi th the requi s i t i on .

Remove the rel ay from i ts ca s e and check that there a re no broken o r cracked

mol ded parts or other s i gns of phys i cal dama ge and that a l l screws are t i ght .

that the s horti n g bars are i n the pro per l ocat i on ( s ) as s hown by the i nternal

connec ti o n s d i a gram, Fi gs . 5 to 9 i ncl us i ve, and that the ma i n brus h i s pro perl y

formed to contact the s ho rt i n g ba r .

GEK-49848A

Th i s un i t i ns erts add i ti onal res i s tance i n