NHP TemBreak PRO User Manual

105 pages

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Version

1.1.0

NHP Electrical Engineering Products

AU 1300 NHP NHP

NZ 0800 NHP NHP

nhp.com.au

nhp-nz.com

B Model Moulded Case Circuit Breaker

Basic Electronic

Trip Unit from 250A up to 1600A

USER MANUAL

Table of Contents

Questions and Answers:

J
James JoyceAug 6, 2025
Why is my NHP Circuit breaker nuisance tripping?
- R
  Robert RobinsonAug 6, 2025
  Nuisance tripping in NHP Circuit breakers can occur even when the rated current hasn't been reached due to several factors: * **Vibration and/or shock:** Dampen the vibration of the MCCB and review installation requirements. * **High proportion of high-frequency distortion in load current:** Decrease the distortion content of the load circuit. * **Electromagnetic induced interference:** Review nearby sources of conducted and radiated emissions. * **Excessive surge:** Isolate and mitigate the surge source. * **Erroneous connection of control circuit for SHT or UVT:** Verify the control wiring and supply to the SHT and UVT.
C
Cody WilsonAug 13, 2025
What causes nuisance tripping due to starting current in NHP TemBreak PRO?
- K
  Kimberly RamirezAug 13, 2025
  Nuisance tripping of NHP Circuit breakers due to starting current can occur because of: * **Excessive inrush starting current:** Review INST and STD protection settings for the load type. * **Switching operation of star-delta motor starter, incorrect wiring:** Verify and correct any issues with star-delta starter wiring. * **Short-circuit in motor:** Verify and correct any issues with motor wiring and inspect motor winding insulation. * **Erroneous connection of control circuit for SHT or UVT:** Verify control wiring and supply to SHT and UVT.

NHP TemBreak PRO Specifications

General

Brand	NHP
Model	TemBreak PRO
Category	Circuit breakers
Language	English

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