... use in Utility to Generator system, it can send a signal to start generator command.Double-power Automatic Transfer ... was consist by two units MCB or MCCB in 3P,4P and their accessory (Auxiliary ,warning contact,)machine ... :Q2ERated Current: 10A,63A,100A,225A,400A,630A,800APoles:3P,4PMore:1.split type2.short circuit, overload protection ,fire ... Automatic transfer switch ATS 220V Q2E 100-800A 3P,4P