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QBZ(QBB) Mine explosion-proof wind and electricity interlocking assembly switch1. ApplicationThis series of products can be used as appropriative wind and electricity interlockingassembly switches for digging surfaces in AC 50 Hz, 1140γ, 660γor380γ, rated current≤400A power supply circuits in coal mines. The assemblyswitch is suitable for various combinations of working surface power loadsand blower loads. When a working surface needs a standby blower, the assemblyswitch can make the standby blower switched automatically. And the assembly switchcan drag opposite revolving blower for wind and electricity interlocking. Gas,wind and electricity interlocking can be realized ff the starter is attachedwith the FDZB methane, wind and electricity interlocking equipment made by our company.2. Protective fnctions(1). The assembly switch has protective functions of overcurrent, short-circuit,phase loss, current leakage, wind and electricity interlocking and gas, wind and e