GEK-86038
The back of the case has stu d s mounted in an outer block. These stu d s a re used for'
making the external wiring connections to the relay case . A removable connection plug
connect s the o uter block to an inner block which is connected to the internal wiring
of the relay. Both the outer and inne r blocks have s pring-backed contact fingers to
a ss u re good electrical contact with the c onnection plug.
The relay mechanism is mounted in a steel framewo rk called a cradle and is a
complete unit with all leads being terminated at the inner block.
The cradle is
held securely in the case with a latch at the to p and the bo ttom and by a guide pin
at the back of the case. The case and cradle design prevents inserting the relay
into the case u pside down.
The connection plug , besides making electrical
connections, al so locks the latch in place.
The cover, in tu rn , holds the
connection plug in place .
To d raw out the relay unit from the case, first carefully remove the cove r ,
then the connection pl ugs. Sho rting bar s a re built into the relay case to short the
cu rrent transfo rmer circuit s.
Release the latches.
The relay unit may now be
removed f rom the case by pulling on the c radle. To replace the relay unit, follow
the reve rse o rder.
U se care when placing the cove r back on to the relay case to
avoid damaging the reset mechanism.
RECEIVING� HANDL ING A ND STORAGE
These relays , when not inclu ded a s part of a control panel , a re shipped in
cartons designed to protect them against damage.
Immediately upon receipt of a
relay , examine it for any damage s u stained in transit.
If damage due to rough
handling is evident , file a damage claim at once with the t rans portation company and
promptly notify the nea rest General Electric Appa ratus Sales Office.
Exe rcise care when handling o r unpacking the relay , to avoid disturbing
adju stments or damaging the relay.
Perfo rm an ins pection and an acce ptance test as soon a s the relay is received
to make s u re that no damage was s u stained du ring shipment and that the relay
calibrations have not been distu rbed.
If the relays are not to be installed immediately, they should be sto red in
their original ca rtons in a place that is free from moistu re , d u st and metallic
particles .
Fo reign matter collected on the outside of the case may find it s way to
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the inside of the case when the cover is removed , creating the po ssiblity of relay
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misoperation .
IN S TALLAT I ON
The location sho uld be clean and d ry, free from d u st and vib ration , and well
lighted to facilitate inspection and testing .
The relay sho uld be mounted on a vertical su rface.
d rilling d rawings a re shown in Figu res 17 and 18 .
1 0
The outline and panel
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