Standard
UPDATE AVAILABLE
AS C89-1940
[Superseded]Oil circuit-breakers, oil switches, and oil isolating-switches, for alternating-current circuits. Three-phase oil circuti-breakers with breaking-capacity ratings above 500 MVA
Applies to three-phase oil circuit-breakers with rated breaking-capacities above 500 MVA. The service conditions for which oil circuit-breakers conforming to this specification are suitable are given in Appendix C.
Published: 01/01/1940
Content history