Transmission Line Protection Busbar Protection Transformer Protection Circuit Breaker Protection Generator Protection Feeder Protection Capacitor Protection Motor Protection Transfer & Synchronization Arc Protection
To enhance the operation of circuit breakers in a substation, NR offers breaker failure protection with auto-reclosing function for circuit breakers in one-and-a-half breaker application, ring breaker applications, bus coupler and bus section. It can initiate breaker failure protection or directly trip the adjacent breakers.
The PCS-921 numerical relay provides protection for circuit breakers, which includes breaker failure protection, pole discrepancy protection, dead zone protection, phase/ negative sequence overcurrent protection, earth-fault protection, overvoltage protection, undervoltage protection, frequency protection, single and/or three-pole auto-reclosing and synchronism check functions. The PCS-921 relay employs the programmable logic, configurable I/Os and definable 3-color LEDs to provide flexibility for specific applications. Frequency tracking is used to minimize the sampling error ca…More Info
The PCS-9830 switching controller is a three-phase control device for circuit breakers it serves to open or close at specified phase angle on voltage waveform in order to minimize the impulse caused by switching on. The controlled switching technology significantly eliminates harmful electrical transients upon planned switching, and thereby extending the breakers life time and improving the stability of the entire power system.More Info