Protection Relay

IED is for 25.8kV distribution line that can monitor and control distribution lines through IEC61850 communication. The device is a combined digital protection relay with line protection, measurement, control and monitoring functions. It monitors and control of distribution lines through IEC61850 communication and provides overcurrent protection and precise measurement values for the main and feeder of distribution lines by installing in 25.8kV Class GIS distribution panels.

The IED for transformer is a combined digital protection relay with transformer protection and measurement functions. It provides protection elements and precise measurement value for ratio differential and overcurrent in case of internal accident of transformers, and controls transformer monitoring and breaker through IEC61850 communication.

IEC61850-based digital substation IED for monitoring, control, measuring, and interlocking of transformers installed in Local Control Panel

IEC61850-based digital substation IED for monitoring, controlling, measuring, and interlocking installed for substation power and disaster prevention and security facilities of 154kV substations.

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.