CONTROL WIRING/PHASE LOSS







Let us protect your equipment with PHASE LOSS PROTECTION.  Please read the article below for benefits.




                                                                                                                                
Simple example of one of our installations



Three-phase motors are commonly used in commercial and industrial facilities. Loss of a single phase can damage equipment, resulting in loss of productivity and costly repair. If three-phase equipment is critical to your operations, phase protection makes good business sense.

What Causes Phase Loss?

The loss of a single phase on a three-phase line may be due to a downed power line or a blown pole-top fuse on the utility system. Loss of a single phase may also result from a single-phase overload condition causing one fuse to blow, or an equipment failure within your facility.

A small phase voltage unbalance will not typically harm a motor. However, greater unbalances often lead to to insulation breakdown and shorter equipment life. The complete loss of a phase is essentially an extreme phase unbalance. It is more difficult to detect than simple phase unbalance and it can damage a motor very quickly. If not detected within as little as five seconds, the motor is a likely candidate for repair.

Phase Loss Protection

Phase loss protection devices are relatively inexpensive and simple to install. They provide protection by disconnecting equipment from the circuit when phase loss is sensed. The most commonly-used phase protection solution is a phase monitor.

In addition to voltage, most phase monitors also measure current or phase angle, which—in addition to small voltage changes—indicates phase loss. Phase monitors detect over-voltage, under-voltage, phase reversal, and excessive on/off cycling—all of which can damage motors. They react to total phase loss or phase unbalance. The action taken by the monitor can range from audible or visible alarms to complete shutdown of the motor.


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