Protection Of Pumps And Motors From Electrical Faults

A pump is the heart of most irrigation systems and if not maintained can use much more power than required leading to excess pumping costs and wasting electricity. Line voltages issues are very common in irrigation applications, which ultimately can result in Motor & Pump failure.

In such applications, it is required to monitor Phase loss/Phase unbalance, Phase sequence, Under-voltage, Over-voltage, Neutral loss in order to prevent Motor & Pump from permanent damage.

SM 500 series from GIC is used to monitor under/over voltage condition of the supply side of the motor. The relay trip condition is based on the selectable range of Under/Over voltage settings. The phase loss, phase unbalance, phase sequence and neutral loss are effectively sensed and relay is tripped in order to protect Motor & Pump. All trip conditions are effectively indicated on the device. SM 500 relays also have adjustable time delay setting. Various selectable ON delay and OFF delay timings in different models makes SM 500 series suitable for several applications. The function of trip setting is helpful for adjusting the specific delay based on customer requirement. On delay and OFF delay helps in avoiding nuisance tripping. ultimately this helps in preventing motor & pump from permanent damage.