HOISTING at Teck Washington Incorporated
During the Operator Safety checks on the Hoist system the operator went to move the skips and two fuses blown. There were no more fuses on the property. Failed SCR was detected. The number 2 quad module had one SCR with an open circuit on the gated side. This module is on the same incoming power as modules 7 and 8 With one failed SCR not firing unable to complete proper waveform.
U.S. Mine Safety and Health Administration