BS 142-1-1.2:1982

Specifies, by reference to BS 5992:Part 1:1980 the conditions for testing contact performance of electrical protection relays, the criteria of contact failure for such relays and the assessment of performance data. Also lists preferred values of contact ratings and gives definitions of the terms used and guidance on the presentation of performance data.

All current amendments available at time of purchase are included with the purchase of this document.