GE IBCG51M, Инструкция по эксплуатации

Страница: 13 / 49

upon receipt of the relay an INSPECTION AND ACCEPTANCE TEST should be
made to ensure that no damage has been sustained in shipment and that the relay
calibrations have not been disturbed.
If the examination or the test indicates that
readjustment is necessary, refer to the section on SERVICING.
These tests may be performed as part of the installation or at
the discretion of the user.
Since most operating caapanies use different procedures for acceptance and
installation tests, the following section includes all applicable tests that may be
performed on these relays.
VISUAL INSPECTION
Check the stamping to ensure that the model number and rating of the
relay agree with the requisition.
Remove the relay its case and check that there are no broken or
molded parts or other signs of physical damage and that all screws are tight-
that the shorting bars are in the proper location(s) as shown by the internal connec-
tions Figs. 5 to 9, inclusive, and that the main brush is properly formed
contact the shorting bar.
MECHANICAL INSPECTION
Top Unit (TOC)
1 .
The disk shaft end play should be inch.
2. The disk should be centered in the air gaps of both the electromagnet and drag
magnet.
3. Both air gaps should be free of foreign matter.
4. The disk should rotate freely and should return by itself to the reset position.
5. The moving contact should just touch the stationary contact when the time dial
at the zero time dial position.
Unit (DIR)
The rotating shaft end play should be 0.015-0.020 inch.
The contact gap should be 0.015-0.025 inch on the low gradient contact.
Tarqet and Seal-in Unit/Instantaneous Unit
The armature and contacts should move freely when operated by hand.
contacts should make at approximately the same time.
3. The target should latch into view just as the contacts make and should unlatch
when the target release button is operated.
4. The contacts have approximately 0.030 inch wipe.
*Indicates Revision
ACCEPTANCE TESTS
13