Description

BS 561 – Specification for alternating-current line relays double-element 3-position (for railway signalling)

2-element, 3-position relays for railway signalling circuits up to 250 volts. Mounting, mechanical clearances, bearings, coils, contact capacity, contact pressure, contact resistance, flexible connections, terminals and terminal markings, insulation tests, pick-up and drop away values, labelling and marking, finish, pointer scale.

Cross References:
BS 442

Product Details

Published:

06/15/1951

ISBN(s):

0580006670

Number of Pages:

16

File Size:

1 file , 360 KB

Product Code(s):

00021162, 00021162, 00021162

Note:

This product is unavailable in Ukraine, Russia, Belarus