PT531 Potentail voltage transformer

Electrical Specification

(Customized is available)

Rated Current	30A
DC Resistance at 25℃	145±10%Ω
Dielectric Withstanding Voltage(Hi-pot)	2500Vrms
Inductance	△I≤0.05mA

No short circuit is allowed on the secondary side of the voltage transformer. Since the internal impedance of the voltage transformer is very small, if the secondary circuit is short-circuited, a large current will appear, which will damage the secondary equipment and even endanger personal safety.

The voltage transformer can be equipped with a fuse on the secondary side to protect itself from being damaged by a short circuit on the secondary side. If possible, fuses should also be installed on the primary side to protect the high-voltage power grid from endangering the safety of the primary system due to the failure of the transformer’s high-voltage windings or lead wires.
In order to ensure the safety of people when touching measuring instruments and relays, the secondary winding of the voltage transformer must be grounded at one point. Because after grounding, when the insulation between the primary and secondary windings is damaged, it can prevent the high voltage of the instrument and the relay from endangering personal safety.
Short circuit is absolutely not allowed on the secondary side of the voltage transformer.