Acceptance Tests; V I Sual I Nspect I On - GE IAV51A Instructions Manual

Voltage relays

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Instructions manual (16 pages)

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Table of Contents

seal - i n uni t pi cks up and sea l s i n .

l a tches up and rema i ns exposed unti l rel eased by press i ng a button beneath th e l ower- l eft corner of the

cover .

The case i s s u i tabl e for ei ther s urface or semi -fl ush panel mounti ng a nd an assortmen t of hardware i s

prov i ded for ei ther mounti ng .

one i s requ i red .

Two of th e cover s crews have provi s i on for a sea l i ng wi re .

The case has s tuds or screw connecti ons at both ends or at the bottom only for the ex terna l connec

ti ons .

The el ec tri cal connecti ons between the rel ay uni ts and the case s tuds are made th rough spri ng

bac ked contact fi ng ers mounted i n s ta ti onary mol ded i nner and oute r b l ocks between wh i ch nests a removabl e

connecti ng pl ug whi ch compl etes the ci rcu i ts .

the external connec ti ons , and the i nner bl ocks h ave the termi nal s for the i nternal connecti ons .

The rel ay mechani sm i s mou n ted i n a s teel framework cal l ed the crad l e and i s a compl ete uni t wi th al l

l eads bei ng termi na ted at the i nner b l ock .

and the bottom and by a g u i de pi n at the back of the cas e .

th e rel ay cannot be i nserted in the case ups i de down .

connec ti ons between the res pect i ve b l ocks of the c radl e a n d case , a l so l ocks the l a tch i n pl ace .

cove r , which is fas tened to the case by thumbscrews hol ds the connecti ng pl ug i n pl ace .

To draw out the crad l e from a s i ng l e ended case , the cover mus t fi rst be removed .

pl ug can be drawn out.

opened .

After the connecti ng pl ug has been removed , the l ower l a tch can be re l eased a nd the crad l e eas i l y

drawn out.

To repl ace the cradl e , the reverse order shou l d be fo l l owed .

RECE I V I NG

These rel ays , when not s h i pped as a part of a con trol panel , wi l l be s h i pped i n cartons desi gned to

protect them agai n s t damage .

damage s u s tai ned duri ng sh i pmen t .

at once wi th th e transportati on company and the nearest General E l ectr i c Sal es Offi ce shou l d be noti f i ed

promptl y .

HANDL I NG

Reasonab l e care shoul d be exerc i s ed i n unpacki ng the rel ay i n order that none of the parts are

damaged or th e adjustments d i s tu rbed .

STORAGE

If the re l ays are not to be i ns tal l ed i mmed i a tel y , they shou l d be s tored i n thei r ori gi na l cartons i n

a pl ace that i s free from moi s ture , dus t , and meta l l i c chi ps .

Immedi a te l y upon recei pt of the re l ay an I NS PE CT I ON AND ACCEPTANCE TEST shou l d be made to i ns ure tha t

n o damage has been sustai ned i n shi pment and that the rel ay cal i brations have n o t been d i s turbed .

I f no pi c kup va l ue for the l eft contact i s s peci fied on the requ i s ition for the rel ays wi th tap bl ocks ,

the re l ay i s s h i pped w i th the tap p l ug i n the fi fth tap .

tap correspond i ng to th i s val ue .

i s put i n the tap nearest the req ui red va l ue ( the l ower tap i s used i f the val ue i s hal f way between two taps )

and the spri nq i s adj us ted to obta i n the requi red pi ckup .

V I SUAL I NSPECT I ON

Check the namepl a te s tampi ng to i ns u re th at th e model number and rati ng of the rel ay agree wi th th e

requi s i ti on .

Remove the re l ay from i ts case and check th at there are no broken or cracked mo l ded parts or other

s i g ns of phys i cal damage and that a l l screws are ti g h t .

l ocati on ( s ) and tha t they are properly formed ( s ee Fi g . 9 ) .

When the seal - i n u n i t pi cks up , i t ra i s es a target i nto vi ew wh i ch

The c0ver a ttaches to the case and al so carri es the reset mecha n i sm when

The outer b l ocks , a ttached to the case , have the s tuds for

Th i s crad l e i s hel d fi rmly i n the case wi th a l a tch a t the top

I n so doi ng , th e tri p c i rcui t is fi rst opened , then the vol tage ci rcu i ts are

RECE I V I NG , HANDL I NG AND STORAGE

Immed i a tel y u pon rece i pt of the rel ay , an exami nati on shou l d be made for a ny

I f i nj u ry or rough h andl i ng i s evi den t , a damage cl ai m shou l d be fi l ed