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WACs > Title 296 > Chapter 296-96 > Section 296-96-23276











296-96-23274    

296-96-23277







No agency filings affecting this section since 2003







WAC 296-96-23276









What requirements apply to phase reversal and failure protection methods?









Elevators having polyphase alternating current power supply must be equipped with a means to prevent the starting of the elevator motor if the phase rotation is in the wrong direction or if there is a failure of any phase.
This protection may be considered to be provided in the case of generator field control having alternating current motor-generator driving motors, provided a reversal of phase will not cause the elevator driving machine motor to operate in the wrong direction. Controllers on which switches are operated by polyphase torque motors provide inherent protection against phase reversal or failure.
[Statutory Authority: RCW 70.87.020, 70.87.030, 70.87.034, 70.87.120, 70.87.185 and chapter 70.87 RCW. WSR 01-02-026, § 296-96-23276, filed 12/22/00, effective 1/22/01.]