NHP Terasaki TemBreak PRO P SE Series User Manual

122 pages

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Version

1.2.0

NHP Electrical Engineering Products

AU 1300 NHP NHP

NZ 0800 NHP NHP

nhp.com.au

nhp-nz.com

P Model Moulded Case Circuit Breaker

SMART Electronic

Trip Unit from 160A up to 630A

USER MANUAL

Using this Manual2
- Safety Precautions2
Summary of Changes3
Table of Contents4
Introduction6
- Who Should Use this Manual6
- Additional Resources6
- Terminology and Abbreviations7
Product Information8
- Part Number Break down9
- Available Mccbs in the Tembreak PRO Range10
- P160_SE and P250_SE Information11
- P400_SE Information12
- P630_SE Information13
Internal Accessories14
- Auxiliary & Alarm Switches14
  - Auxiliary Contact14
  - Alarm Contact14
- SMART Auxiliary AX / al Status Indicator14
- Shunt Trip15
- Under Voltage Trips15
P_SE Only MCCB Accessories16
- Temview PRO (TPED)16
- Temcom PRO (TPCM)17
- Connection Cables18
Plugs & Ports19
Installation20
- Precautions20
- Mounting Angles20
- Direction of Power Supply20
- Clearances21
- Internal Accessory Mounting Locations23
- Alarm, Shunt & UVT Installation26
Protection Settings29
- Trip Curve29
- Long Time Delay Protection (LTD)30
- Short Time Delay Protection (STD)34
- Thermal Self-Protection41
- Instantaneous Protection (INST)42
  - Adjusting I I (Current)42
- Ground/Earth Fault Protection (GF)43
- Neutral Protection (NP)45
  - Adjusting I R and I Sd for Neutral Protection (Current)45
- Zone Selective Interlocking Function (ZSI)46
Measurement and Settings49
- Overview of Measurements49
- Accuracy of Measurements51
- Real-Time and Min./Max. Measurements52
- Current and Voltage Imbalances54
- System Phase Sequence55
- Power Related Measurements56
  - Active, Reactive, Apparent Power56
  - Power Factor (PF and Cosφ)59
- Total Harmonic Distortion (THD)61
  - Current (THD I)61
  - Voltage (THDV, THDV U , THDV V )61
- Demand Values (Averaged Values over an Interval)62
  - Demand Mode63
- Energy Measurements65
Alarms66
- Alarm Types66
- Alarm Indication66
- Priority Level67
- System Alarms68
- PTA (Pre-Trip Alarm)69
  - Pre-Trip Alarm Configurable Settings70
- Trip Alarms71
  - Last Trip71
- Custom Alarms72
- OAC (Optional Alarm Contact)79
  - Optional Alarms List79
Date & Time80
History81
- Trip Alarm Log81
- Custom Alarm Log81
- Protection Setting Changes Log82
Write Protection83
- Remote Write Authorization83
- Password Management84
  - Changing the Password84
OCR Power Supply85
- Self-Power Requirements85
- External 24V DC Supply Requirements85
- External 24V DC Supply Instructions - CIP Adapter Cable86
Navigation88
- P_SE OCR Overview88
- Principles of Navigation89
- Locking / Release Button89
- Navigation Menus90
- Sleep / Standby94
Commissioning95
- Starting the P_SE MCCB for the First Time95
- LTD Protection Adjustments96
- Navigation and Settings after the First Setup98
- Accessing Measurements100
- Setting Favourites101
- Accessing Setup Settings102
Troubleshooting104
Annex a - Dimensions106
- P160 Dimensions106
- P250 Dimensions107
- P400 Dimensions108
- P630 Dimensions109
Annex B - Trip Curves110
Annex C - I 2 T Let-Through Curves111
- P160_Se111
- P250_Se112
- P400_Se113
- P630_Se114
Annex D - Peak Let through Curves115
- P160_Se115
- P250_Se116
- P400_Se117
- P630_Se118
Annex E - Watts Loss119
Annex F - Rated Temperature Tables120

Questions and Answers:

S
Stephanie JohnsonAug 16, 2025
Why are my NHP Circuit breakers nuisance tripping?
- D
  Dennis WoodardAug 16, 2025
  Nuisance tripping in NHP Circuit breakers, even when the rated current isn't reached, can occur due to several reasons: * Vibration or shock: Dampen the vibration of the MCCB and review the installation requirements. * High-frequency distortion: Decrease the distortion content of the load circuit. * Electromagnetic interference: Review nearby sources of conducted and radiated emissions, such as radio sources and high-speed switching devices. * Excessive surge: Isolate and mitigate the surge source, for example, using surge protection devices. * Control circuit errors: Verify the control wiring and supply to the SHT and UVT.
M
michaeljohnsonAug 19, 2025
What to do if the embedded display is blank on my NHP Circuit breaker?
- D
  debbie85Aug 19, 2025
  If the embedded display on your NHP Circuit breaker is blank, there could be several reasons: * Insufficient power: Verify the power supply requirements, ensuring the MCCB is closed and the load is drawing sufficient current, or that the external 24V dc power supply is operational. * Wiring issues: Check the integrity of the wiring and connections, looking for loose connections or incorrect terminals. * Display seating: Ensure the display connections are clean and undamaged. Un-clip the display, verify the connection pins and gold tabs are clean, and re-insert the display firmly. * Faulty display: If none of the above steps work, the display might be faulty and need replacement.