How Zero Sequence Current Transformer works
Nov 15, 2023| 1. Winding current transformer. Zero Sequence Current Transformer usually consists of a wound current transformer, which includes a primary winding and a secondary winding. The primary winding is connected to the conductors in the grid through which current flows, while the secondary winding is connected to measuring equipment such as protective relays or monitoring systems.
2. Detect zero sequence current. When a ground fault occurs in the power grid, part of the current will leak to the ground, generating zero sequence current. The secondary winding of the transformer detects this zero sequence current.
3. Signal transmission. The transformer converts the detected zero-sequence current into a secondary signal and passes it to the measuring device. This usually involves the reduction of current and the transmission of signals.
4. Data analysis and operation. The measuring device analyzes the received secondary signals and takes necessary actions, such as cutting off the power supply or sounding an alarm, based on predetermined criteria and the device's settings.