MOV on the proper use of distribution transformers

Metal oxide arrester ?during normal operation and distribution transformers in parallel, the terminating line, the lower end of the ground. The pressure generated when the three parts? MOV for Counter When the line overvoltage occurs, this time over-voltage distribution transformer will be subjected by lightning, leads and grounding devices drop, known as residual pressure. In this three-part over voltage,?lightning arrester?residual pressure on its own performance related to its residual voltage value is constant. Residual voltage on the grounding device can be connected to the grounding deflectors distribution transformer housing, then connected to the grounding device and how to eliminate them. And how to reduce the residual voltage of the leads has become the key to the protection of distribution transformers.

Lead impedance and current frequency through, the higher the frequency, the inductance of the wire, the stronger the greater impedance. From U = IR shows that to reduce the residual pressure on the lead, you have to narrow the lead impedance, and possible ways to reduce the lead impedance is to shorten the distance between the arrester from the distribution transformer to reduce the lead impedance, lower lead drop, so arresters should be installed in a more appropriate distribution transformer near point distance.