256/400

256/400 is a 200 series voltage and phase monitor. Three-phase monitor confirms the correct sequence and detects the failure of any one phase. Phase failure results in a flashing red LED and opening of the output relay. It is approved by EN 60255-6, EN 61010-1, UL standards.

• Relay monitors phase sequence and failure, designed for monitoring 3-phase primaries
• Input from all phases maintains functionality in case of one-phase failure
• Input and monitored input voltage 3 x 480V, fixed time delay (T1): 500ms
• Adjustable time delay (T2): 0 to 10seconds, 14AWG max. cable size
• Fault indicator: red LED, plus opening of output relay contact, IP 40 from front panel
• Relay output form: SPDT (form C) 8Amps / 250VAC, DIN rail mounting
• L1, L2, L3 supply and measuring terminals, minimum threshold is adjustable, 70%-95% nominal
• 2VA power consumption (max), 5% hysteresis, 3x276VAC max. constant voltage
• 100,000 operations electrical life, 4KV dielectric strength
• Operating temperature range from -20°C to +55°C