ICM400 3 Phase Line Voltage Monitor - Delay on Break Timer (.1-5 Minutes)

ICM's line voltage monitors were specifically designed to protect compressor motors and other 3-phase loads from premature failure or damage due to common voltage faults. They offer complete system protection by monitoring both the line (front) and load (back) side of the system including the power, motor and contactor lines. In addition, an integral "delay on break timer" guards against rapid short cycling at both the control circuit and the 3 phase lines. Compact and easy to install, the ICM400 and ICM450 provide highly reliable protection for your valuable equipment.

Features

• Lower cost, full performance version featuring bright LED indicators to display system faults
• Monitors "front" and "back" sides of system
• Universal voltage operation: 190-630 VAC
• Knob-adjustable features and system set points
• Reset mode: choice of auto or manual (lockout)
• Built-in anti-short cycle protection
• Protects against voltage unbalance, high/low voltage, phase loss, reversal, faulty power, incorrect sequencing and rapid short cycling

Mode of Operation:
At power up, the ICM400 evaluates the incoming power for proper phase sequence, amplitude, and symmetry (voltage unbalance). If the three phase input at the line side connections is within user set parameters, the internal relay is energized and the load energize LED is turned on. Continuity will be across terminals 4 and 6.

If connections are made to the load side terminals, the ICM400 will transfer monitoring over to the load side only. When a critical fault condition (phase loss or phase reversal) is present, the relay will immediately de-energize and the load energize LED will turn off. Continuity will be across terminals 4 and 5.

If a non critical fault condition (unbalance, high or low voltage) is present, the ICM400 will ignore it for the interrogation delay time. If it is still present following the interrogation delay time, the relay will de-energize and the load energized LED will turn off. Continuity will be across terminals 4 and 5. The relay will not energize if any fault conditions exist. The integral adjustable delay on break timer will prevent short-cycling.