NHP TERASAKI TemBreak PRO

Other manuals for NHP TERASAKI TemBreak PRO

Operating Instructions2 pages

Questions and Answers

M
Melissa JacobsAug 5, 2025
Why is my NHP Circuit breaker tripping when the rated current is not reached?
- E
  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.
K
Kelsey SmithAug 11, 2025
What to do if NHP Circuit breaker trips due to starting current?
- G
  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.
C
Christina HawkinsAug 17, 2025
Why NHP Circuit breaker no trip at pickup current?
- P
  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).
L
lserranoAug 23, 2025
What to do if NHP Circuit breaker fails in RESET position?
- M
  Manuel WeaverAug 23, 2025
  If your NHP Circuit breaker fails in the RESET position, first check if the UVT is energized and apply voltage to it if it is not. If the circuit breaker's service life has ended due to a large number of switching cycles using the SHT or UVT, replace the MCCB.
N
Nancy BrownAug 29, 2025
How to fix NHP TERASAKI TemBreak PRO Circuit breakers failure in ON position?
- D
  Dawn JohnsonAug 29, 2025
  To address a failure in the ON position of an NHP Circuit breaker, perform a reset operation.

Summary

Using this manual

Safety Precautions for Using this Manual

Discusses safety guidelines for installation, operation, and maintenance.

Summary of Changes

Introduction

Target Audience and Required Knowledge

Identifies target audience and required knowledge for the manual.

Supplementary Documentation and Resources

Lists other documents for supplementary information.

Terminology and Abbreviations

Product Information

TemBreak PRO Part Number Structure

Explains the structure and meaning of product part numbers.

MCCB Label Identification Guide

Details how to identify product information from the MCCB label.

Specific Model Technical Data Overview

Provides an overview of technical data for P160, P250, P400, and P630 TM models.

Internal Accessories

Auxiliary and Alarm Switch Functionality

Describes auxiliary and alarm contacts for MCCB functionality.

Shunt Trip and Under Voltage Trip Modules

Details shunt trip coils and under voltage trip modules for MCCB operation.

Installation

General Installation Precautions and Guidelines

Essential safety warnings and general installation guidance.

Mounting Angles and Power Supply Direction

Information on permissible mounting orientations and power feed directions.

Installation Clearances and Insulating Distances

Details required spacing and insulation for safe installation.

Internal Accessory Mounting Locations

Shows positions for installing internal accessories within MCCBs.

Installing Alarm, Shunt, and UVT Accessories

Guides on installing alarm, shunt, and UVT accessories.

Protection Settings

Trip Curve and Protection Function Overview

Explains the time-current characteristics and functions of the trip unit.

Thermal Overload Protection Settings

Details adjustable and fixed thermal overload protection settings.

Magnetic Short-Circuit Protection Settings

Explains adjustable and fixed magnetic short-circuit protection settings.

Neutral Pole Protection Settings

Covers the thermal and magnetic protection settings for the neutral pole.

Temperature Ratings and Derating Effects

Information on how temperature affects protection settings and calibration.

Commissioning

Commissioning Thermal Setting (Ir)

Guide on setting the thermal overload trip threshold.

Commissioning Magnetic Setting (li)

Guide on setting the magnetic short-circuit trip threshold.

Commissioning Neutral Protection Setting (N)

Instructions for adjusting the neutral pole protection setting.

Troubleshooting

Annex A - Dimensions

P160 MCCB Dimensions

Provides dimensional drawings and specifications for P160 models.

P250 MCCB Dimensions

Provides dimensional drawings and specifications for P250 models.

P400 MCCB Dimensions

Provides dimensional drawings and specifications for P400 models.

P630 MCCB Dimensions

Provides dimensional drawings and specifications for P630 models.

Annex B - Trip Curves

P160 F;N;H Time-Current Trip Curves

Time-current trip curves for P160F, P160N, and P160H models.

P250 F;N;H Time-Current Trip Curves

Time-current trip curves for P250F, P250N, and P250H models.

P400 E;F;N;H;S Time-Current Trip Curves

Time-current trip curves for P400E, P400F, P400N, P400H, P400S models.

P630 E;F;N;H;S Time-Current Trip Curves

Time-current trip curves for P630E, P630F, P630N, P630H, P630S models.

Annex C - I2 t Let Through Curves

P160 F;N;H I²t Let-Through Curves

I²t let-through energy characteristics for P160F, P160N, P160H.

P250 F;N;H I²t Let-Through Curves

I²t let-through energy characteristics for P250F, P250N, P250H.

P400 E;F;N;H;S I²t Let-Through Curves

I²t let-through energy characteristics for P400E, P400F, P400N, P400H, P400S.

P630 E;F;N;H;S I²t Let-Through Curves

I²t let-through energy characteristics for P630E, P630F, P630N, P630H, P630S.

Annex D - Peak Let Through Curves

P160 F;N;H Peak Let-Through Curves

Peak let-through current characteristics for P160F, P160N, P160H.

P250 F;N;H Peak Let-Through Curves

Peak let-through current characteristics for P250F, P250N, P250H.

P400;P630 Peak Let-Through Curves

Peak let-through current for P400 and P630 series.

Annex E - Watts Loss

MCCB Impedance and Watts Loss Data

Details impedance and power loss for various MCCB ratings.

Annex F - Temperature Derating

Temperature Derating for Front;Rear Connect

Temperature derating tables for front and rear connected MCCBs.

Temperature Derating for Plug-in Connect

Temperature derating tables for plug-in connected MCCBs.