Category: BS
BS
Electrical protection relays. Requirements for the principal families of protection relays-Specification for thermal electrical relays
standard by BSI Group, 05/31/1991
Schedule of copper alloy ingots and copper and copper alloy castings
standard by BSI Group, 06/26/1961
Specification for perchloroethylene (tetrachloroethylene)
standard by BSI Group, 03/14/1968
Specification for precast concrete flue blocks for gas fires and ventilation.
standard by BSI Group, 12/21/1945
Electric power switchgear for indoor and outdoor installations up to and including 220,000 volts
standard by BSI Group, 05/01/1936