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Circuit Breaker Protection
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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.
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PCS-921 Breaker Failure Relay
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…
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PCS-921S Breaker Failure Relay
PCS-921S breaker failure relay integrates various protection functions, which is designed for the single- or three-pole circuit breaker on all voltage levels and provides comprehensive protection and control solutions. With its flexibility and the powerful PCS-Studio configuration tool, PCS-921S offers future-oriented system solutions with high investment security and low operating costs.
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PCS-9830 Switching Controller
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.
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