Broyce Control, Ltd. Relay, Voltage Sensing, Dpdt, 520Vac; Product Range Broyce Control M3PRT/2 280-520VAC

The M3PRT/2 is a microprocessor-controlled relay for monitoring three-phase AC supplies, detecting phase loss, reversal, and undervoltage with adjustable time delay. It measures phase-to-phase voltage and is housed in a 35mm DIN rail-compatible case weighing approximately 100g. The unit has a DPDT relay output rated at 8A AC1 (250V AC, 2000VA) and 3A AC15, with 4kV impulse withstand and 2kV dielectric strength. It monitors voltage ranges of 77-143V AC, 161-300V AC, and 280-520V AC across L1-L2, L2-L3, and L3-L1, respectively, at 48-63Hz. Trip level and delay settings are adjustable. LEDs indicate supply and relay status. The housing is UL94 V0 flame-retardant. Mounting is via 35mm DIN rail or surface mounting with screws. Terminals accept up to 2.5mm² conductors. It conforms to IEC standards and operates from -20°C to +60°C.