MLQ2-100FE/2P and MLQ2-100FE/4P have identical core ATS functions. The 2P (red handle) is for AC220V single-phase systems while the 4P (green handle) suits AC400V three-phase four-wire systems, and they are not interchangeable.
Both ATS models share identical core functions:
Automatic / Manual switchable operation modes
Built-in mechanical interlock to avoid simultaneous connection of two power sources
LED status indicators for source A, source B and load
Auxiliary contact terminals for remote signal feedback
Rated current: 100A
DIN rail modular installation
Item: MLQ2-100FE/2P
Pole: 2P (L+N)
Rated Voltage: AC220V Single Phase
Switching Action: Switches live wire and neutral wire together
Application: Single phase 220V loads, home & small shop backup power, single phase generator changeover
Handle Color : Red
Item: MLQ2-100FE/4P
Pole: 4P (R, S, T, N)
Rated Voltage: AC400V Three Phase 4-wire
Switching Action: Switches 3 phase live wires plus neutral wire together
Application: Three-phase 400V loads, industrial pumps, fans, commercial three-phase equipment, three-phase generator switching
Handle Color : Green
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