MONITORING RELAY VOLTAGE 2CO 16A U400VAC

Monitoring relays protect expensive electrical equipment from damage caused by changes in electrical setpoints in the power network and indirect effects of voltage fluctuations. For example, cold rooms are equipped with compressors driven by electric motors. These devices cannot withstand operational disturbances because the refrigerant can return to the compressor, causing damage to the cooling unit. A network monitoring relay can, during a fault condition, simultaneously start a backup generator. Phase and current monitoring relays also protect loads during prolonged starting times or if the motor rotor locks, preventing potential equipment damage from resulting overload. Current limitation relays protect circuits against overload to optimize cables and connections. Features

• Monitoring of three-phase supplies
• Voltage monitored at two different levels (under- and overvoltage) in the range of 138 - 276 V or 280 - 480 V (3x400 V)
• Phase asymmetry
• Phase sequence
• Phase failure
• Memory function - return from fault condition to normal state by pressing the Reset button on the front panel
• HRN-43N - for circuits 3x400 V with neutral
• Two contact outputs, function of the second contact selectable (separate / parallel)
• Fixed (t1) delay up to 200 ms and adjustable (t2) delay to eliminate the effect of short voltage spikes and dips
• Galvanically isolated supply voltage 400 VAC
• Output contact: 2 x AC 16 A 250 V AC1
• 3 modules, DIN rail mounting

This product description is an automated translation of the original Finnish description.