NEPSI

The Most Trusted Name in Power Factor Correction and Harmonic Filtering

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.

PRODUCT LITERATURE


SUPPLIER

PROTECTION / ANSI*

TRADE
NAME

METER
DISPLAY

CUTSHEETS

INSTRUCT.

MODBUS
MANUAL

DNP
MANUAL

PROFIBUS
MANUAL

IEC 60870
MANUAL

IEC 61850
MANUAL

SATEC 59, 27, 49, High Voltage Distortion, High Current Distortion PM130 Yes --
SATEC 59, 27, 49, High Voltage Distortion, High Current Distortion EM132
EM133
Yes --
Benshaw 49, Phase Failure, Phase Unbalance SPD Yes -- -- -- -- --
Basler BFD BE1-59NC No -- -- -- -- --
GE
Multilin
50/51, 50N/51N, 67, 49, 50G/51G, 59, 27, 59N, BFD, BF C70 Yes Yes Yes -- Yes Yes
SEL 27, 59, 59N, 50N/51N, 50/51, BFD, AFD, BF 751A Yes Yes Yes -- -- Yes
SEL 50/51, BF, 27, 59, BFD, BF SEL-487V Yes -- -- Yes -- -- Yes
White Rodgers Over-Temp / Fan Failure Snap-Disc No -- -- -- -- -- --
SIBA Fuse Failure, BFD -- -- -- -- -- -- -- --
ABB Arc Flash Mitigation UFES No -- -- -- -- -- --


* 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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