GtH-1214
seal - i n uni t pi cks up and sea l s i n . When the seal - i n uni t pi cks up , i t rai ses a target i nto vi ew wh i ch
l atches up and remai ns exposed unti l rel eased by press i ng a button beneath the 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 assortment of hardware i s
provi ded for ei ther mounti ng . The c0ver a ttaches to the case and al so carri es the reset mecha n i sm when
one i s requi red . Two of the 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 externa l connec
ti ons . The el ectri cal connecti ons between the rel ay uni ts and the case s tuds are made through spri ng
bac ked contact fi ngers 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 outer b l ocks , a ttached to the case , have the s tuds for
the external connecti ons , and the i nner bl ocks have the termi nal s for the i nternal connecti ons .
The rel ay mechani sm i s mounted i n a s teel framework cal l ed the cradl 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 . Th i s crad l e i s hel d fi rmly i n the case wi th a l atch a t the top
and the bottom and by a g u i de pi n at the back of the cas e . The cases and crad l es are so construc ted that
the rel ay cannot be i nserted in the case ups i de down . The connecti ng pl ug , besi des mak i ng the el ectr i ca l
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 . The
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 . Then the connecti ng
pl ug can be drawn out. I n so doi ng , the tri p c i rcui t is fi rst opened , then the vol tage ci rcui ts are
opened . After the connecti ng pl ug has been removed , the l ower l a tch can be rel eased a nd the cradl e eas i ly
drawn out. To repl ace the cradl e , the reverse order shou l d be fol l owed .
RECE I V I NG , HANDL I NG AND STORAGE
RECE I V I NG
These rel ays , when not s h i pped as a part of a control panel , wi l l be shi pped i n cartons desi gned to
protect them agai nst damage . Immedi a tel y u pon rece i pt of the rel ay , an exami nati on shou l d be made for a ny
damage sustai ned duri ng sh i pmen t . I f i nj ury or rough handl i ng i s evi den t , a damage cl ai m shou l d be fi l ed
at once wi th th e transportati on company and the nearest General E l ectr i c Sal es Offi ce shoul d be noti fied
promptl y .
HANDL ING
Reasonab l e care shoul d be exerci sed i n unpacki ng the rel ay i n order that none of the parts are
damaged or the adjustments d i s turbed .
STORAGE
If the rel ays are not to be i ns tal l ed immed i a tel y , they shoul d be s tored i n thei r ori gi nal cartons i n
a pl ace that i s free from moi s ture , dus t , and meta l l i c chi ps .
ACCEPTANCE TESTS
Immedi atel y upon recei pt of the rel ay an I NSPECT I ON AND ACCEPTANCE TEST shoul d be made to i nsure 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 ckup val 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 rel ay i s shi pped with the tap p l ug i n the fi fth tap .
I f
p i ckup i s spec i fied , the t�p pl ug i s set i n the
tap correspond i ng to thi s val ue . I f a speci fi ed val ue does not co i nc i de wi th one of the taps the tap p l uq
i s put i n the tap nearest the requi 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 obtai n the requi red pi ckup .
V I SUAL I NSPECT I ON
Check the namepl ate stampi ng to i nsure that the model number and rati ng of the rel ay agree wi th the
requi s i ti on .
Remove the rel ay from i ts case and check that there are no broken or cracked mol ded parts or other
s i g ns of phys i cal damage and that a l l screws are ti g h t . Check that the shorti ng bars are i n the proper
l ocati on ( s ) and tha t they are properly formed ( see Fi g . 9 ) .
7
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