GE IRT51 E, Инструкция по эксплуатации, Страница: 17 / 51

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GEK-86038
MECHANICAL I NSPECTION AND A DJUSTMENTS
Contact
1.
There sho uld be no noticeable friction when the disk is slowly rotated clockwise .
The disk sho uld retu rn by itself to its rest position against the right stationary
contact o r moving contact sto p . If a tendency to bind o r excessive friction is
evident , check for obstructions to the disk travel. Dirt and metallic particles
in the d rive magnet unit o r drag magnet air ga ps can interfere with the disk
motion.
2 .
The disk shaft should have a vertical end play of l/64 inch to 1/32 inch . The disk
does not have to be in the exact center of either the drive magnet o r the d rag
magnet air gaps for the relay to pe rfo rm co rrectly . Sho uld the disk not clear all
of the air gaps , o r if the end play is not l/64 to 1 / 3 2 of an inch , pe rfo rm the
following adjustment:
End play and disk position is determined by the relative positions of the lower
jewel bearing and the u p per pivot.
Both the bearing and the pivot a re held in
position by set screws in the die-cast su ppo rting frame . The lower jewel is to be
located so the disk is a ppro ximately centered in the air gaps of the d rive magnet
and the drag magnet. The upper pivot should then be located so the shaft has 1/64
to 1/32 inch end play . Both set screws must be secu rely tightened after the
adjustment is complete.
3 .
The contacts sho uld have appro ximately l/32 inch wi pe . That is , the stationary
r
contact tip sho uld be deflected abo ut 1/32 inch when the disk and moving
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contact com plete their travel . The contact wipe on the left stationary contact
is adjusted by tu rning the screws in the contact brush , which regulates the
position of the brush relative to the brush sto p .
I
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The leaf spring on the sto p arm of the I RT5 1 E and the right side stationary
contact on the I RT5 1F , IRT5 1 G and I RT5 1 H models also have appro ximately 1/32
inch wipe . This wi pe can be adjusted by carefully bending the flexible a rm on
the sto p arm or stationary contact .
and Seal-in Units
1 .
The moving contact assembly should move freely when o perated by hand .
2 .
Both contacts sho uld close at the same time .
spring sho uld be in a ho rizontal plane .
The cross member of the "T"
3 . The contact wipe sho uld be at least 1/64 inch . This can be checked by
inserting a 0 . 0 1 0 inch feeler gage between the armatu re and the pole piece.
The contacts sho uld be closed with the 0 . 01 0 inch feeler gage in place .
1. With the unit de-energized , each no rma 1 1 y- o pen contact sho u l d have a ga p of
0 . 01 0 to 0 . 0 1 5 inch .
1 5
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