... ,India,Thailand,Malaysia,HK etc. Model:Q2E Automatic transfer switch 4P Terminal typeIt can detect two power sources`s three phase ... was consist by two units MCB or MCCB in 3P,4P and their accessory (Auxiliary ,warning contact,)machine interlock parts and ... protection. Automatic transfer switch ATS 220V Q2E 100-800A 3P,4P