Digital Protection Relay

The overcurrent protection relay detects the fault current caused by short circuit, overload and earth fault of the line and protects the line by opening the breaker. The digital overcurrent relay is capable of setting various curves and currents and can easily record and analyze accidents.

Instantaneous overcurrent protection relay with BLOCKING contact to prevent malfunction of sudden pressure relay (96P) of oil-insulated transformers by external fault current

The directional overcurrent relay detects an accident by calculating the phase of zero current and the line voltage when fault current is generated by short circuit of line, overload, and ground fault. The digital directional overcurrent relay is capable of setting various curves and currents and easily records and analyzes accidents.

The Overcurrent protection relay with reclosing detects fault current caused by short circuit, overload, and earth fault of the line to open the breaker. When the breaker opens, it is re-input after a short period using temporary instantaneous short circuit and instantaneous ground in order to shorten power interruption time. The relay is a combination of 50/51 and 79 relays.

It is a relay (79) that can shorten the power outage time of the line by switching the circuit breaker after a certain period of time when the circuit breaker is opened caused by temporary short circuit and ground fault of the line. It is used in combination with line protection relays and can be reclosed up to three times.

The relay is operated by imbalance voltage that occurs when a capacitor fails. Capacitor protection relay for equipment that protects an ancillary capacitor (Static Capacitor) used in high-voltage and extra high-voltage line by differential voltage methods.

This detection device constantly monitors leakage current value through the control DC power supply line (P phase/N phase) through the communication type current transformer (DCT), and serves as detection device with alarm output and fault history storage for each channel in case of DC leakage.

A relay used to measure and protect capacitance by measuring harmonic wave, and the energized status of capacitors in low-voltage and high-voltage distribution panels.

It is a device that secures the necessary power by shutting down the general load D/L when low-frequency occurs due to system accident, and is also a control device that receives a signal from a low-frequency relay and can selectively block a number of D/Ls by frequency range.