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MECHANI CAL I NSPECT I ON
(roc)
1 .
The rota t i n g s ha ft end pl ay s houl d be 0 . 015- 0 . 020 i nch .
2 .
The contact ga p s houl d be 0 . 075- 0 . 085 i nch .
3 .
There s houl d be no noti cea bl e fri cti o n i n the rota t i n g s t ructure .
4 .
Wi th the rel ay wel l l evel ed and i n i ts upr i ght pos i ti on, the contact s houl d
be o pen and res t i n g a g a i n s t the backsto p .
M i ddl e U n i t ( TOC )
1 .
The d i sk s ha ft end pl ay s houl d be 0 . 005- 0 . 015 i nch .
2 .
The d i sk s houl d be cente red i n t he a i r ga ps o f both the el ectromagnet and
dra g ma gnet .
3 .
Both a i r ga ps s houl d be free o f fore i gn matter .
4 .
The d i sk s houl d rotate freel y and s houl d return by i ts el f to the reset
pos i ti on .
5 .
The mov i n g contact s houl d jus t touc h the s ta t i onary contact when the t i me
d i al i s at the zero t i me d i al pos i ti on .
Bottom U n i t ( D IR)
1 .
The rota t i ng s ha ft end pl ay s houl d be 0 . 015- 0 . 020 i nch .
2 .
The contact ga p s houl d be 0 . 015- 0 . 025 i nch on the l ow grad i en t front
contact .
3 .
The fron t contact s houl d cl ose a ppro x i matel y 0 . 005 to 0 . 01 0 i nch be fore the
rea r contacts .
Target and Seal - i n U n i ts/ I n s tan taneous U n i t
1 .
The armature and contacts s houl d move freel y when o perated by hand .
2 .
Both contacts s houl d make at a pproxi matel y the s ame t i me .
3 .
The target s houl d l atch i nto v i ew jus t a s the contacts make and s houl d
unl atch when the target rel ease button i s o perated .
4 .
The contacts s houl d have a pproxi matel y 0 . 030 i nch w i pe .
1 .
Wi th the rel ay de-energi zed, each normal l y o pen contact s houl d have a ga p
o f 0 . 010- 0 . 015 i nc h .
2 .
The wi pe on each normal l y cl osed contact s houl d be a pproxi matel y 0 . 005
i nch .
Thi s can be o bserved by d e fl ecti n g the stati onary contact member
towards the frame .
3 .
The wi pe o n each normal l y o pen contact s houl d be a pproxi matel y 0 . 005 i nch .
Th i s can be checked by i nsert i n g a 0 . 005 i nc h s h i m between the a rmature and
the pol e pi ece a n d o perati n g the armature by han d .
contacts s houl d make before the res i dual pi n s t r i kes the s h i m .
GEK-49848A
15
The normal l y o pen
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