PROTECTION
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Power Capacitor Banks can be equipped with various protection relays, meters, and sensors to protect the capacitor bank as well as the system from over-voltage, out-of-balance operation from capacitor failure, internal faults and over-temperature due to fan failure. Protection devices are integrated with the control system and other components to form a fully integrated system.
Relays, meters, and, sensors are set and calibrated at the factory, eliminating the need for testing engineers onsite.
Relays are chosen based on customer preference, system requirements, and NEPSI experience with their performance and reliability.
Click on the custheets below for further details and relays commonly used by NEPSI.
* Protection / ANSI Codes
50 | Phase Instantaneous Overcurrent | 51 | Phase Time OverCurrent |
67 | Phase Directional | 49 | Thermal Overload |
50G | Ground Instantaneous Overcurrent | 51G | Ground Time Overcurrent |
50N | Neutral Instantaneous Overcurrent | 51N | Neutral Time OverCurrent |
59 | Phase Overvoltage | 27 | Phase Undervoltage |
59N | Neutral Overvoltage | BF | Breaker Failure |
AFD | Arc Flash Detection | BFD | Blown Fuse Detection |
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