NHP TERASAKI TemBreak PRO User Manual (English)

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Questions and Answers:

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Melissa JacobsAug 5, 2025
Why is my NHP Circuit breaker tripping when the rated current is not reached?
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  Elizabeth FosterAug 5, 2025
  Nuisance tripping in NHP Circuit breakers can occur due to several reasons. Check for vibration and/or shock and dampen the MCCB, reviewing installation requirements. High-frequency distortion in the load current can also cause this, so decrease the distortion content of the load circuit. Electromagnetic interference from nearby conductors or radio sources may be the culprit; review these sources. Mitigate excessive surges by isolating the surge source, possibly using surge protection devices. Finally, verify the control wiring and supply to the SHT and UVT to correct any erroneous connections.
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Kelsey SmithAug 11, 2025
What to do if NHP Circuit breaker trips due to starting current?
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  Gerald JimenezAug 11, 2025
  Nuisance tripping in NHP Circuit breakers due to starting current can be caused by several factors. If the inrush starting current is excessive due to the load type, review the INST and STD protection settings. For star-delta motor starters, verify and correct any wiring issues with respect to the motor windings and phase sequence, referring to the motor and/or starter manufacturer. A short circuit in the motor (windings, starter circuit) may also be the cause, so verify and correct any motor wiring issues and inspect the motor winding insulation, consulting the motor manufacturer. Lastly, check for any erroneous connections in the control circuit for the SHT or UVT, and verify the control wiring and supply.
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Christina HawkinsAug 17, 2025
Why NHP Circuit breaker no trip at pickup current?
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  perezdebraAug 17, 2025
  If your NHP Circuit breaker fails to trip at the pickup current, review the selectivity/coordination study and protection parameters of each device. Also, review the enabled protection settings, ensuring the correct pickup current and time-delay for the load type (e.g., LTD, STD, INST pickup currents and time delays).