CHINT OVT-X3 Over Voltage Release for NXB-125 MCB Accessories
CHINT OVT-X3 Over Voltage Release for NXB-125 MCB Accessories
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CHINT OVT-X3 Over Voltage Release for NXB-125 MCB Accessories
CHINT OVT-X3 Over Voltage Release for NXB-125 MCB Accessories
CHINT OUVT-X3 Over and Under Voltage Release for NXB-125 MCB
CHINT OUVT-X3 Over and Under Voltage Release for NXB-125 MCB
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Chint SHT-X3 Shunt Release
Chint SHT-X3 Shunt Release

CHINT OVT-X3 Over Voltage Release for NXB-125 MCB Accessories

Brand Name: CHINT
Product Type: Over Voltage Release
Model: OVT-X3
Compatible Series: NXB-125
Application: Low-voltage breaker accessory for panel and distribution systems
Category:

Where to Use Chint Over/Under Voltage Protector?

The CHINT OVT-X3 Over Voltage Release for NXB-125 MCB Accessories is a self-recovery overvoltage and undervoltage protector designed to protect household appliances and electrical equipment from damage caused by abnormal grid voltages. When voltage exceeds safe limits (typically >275V or <160V), the device automatically disconnects power and reconnects when normal voltage returns.

Why You Need Voltage Protection

  • Overvoltage Protection - Prevents damage to appliances from high voltage (common after power restoration)
  • Undervoltage Protection - Prevents motor burnout from low voltage/brownouts
  • Automatic Recovery - Self-resetting when voltage returns to normal, no manual intervention
  • Delay Function - Prevents rapid on/off cycling during voltage fluctuations

Technical Specifications

ModelChint
Rated Current32A - 80A
Overvoltage Cutoff275V AC (typical) - Adjustable on some models
Undervoltage Cutoff160V AC (typical)
Recovery Delay30-60 seconds (prevents rapid cycling)

Installation Location

Install the Chint at the main incoming position of the distribution board, downstream of the main breaker. This provides whole-house protection. The device mounts on standard 35mm DIN rail alongside MCBs.

Description

CHINT OVT-X3 is an original CHINT breaker accessory designed for NXB-125 applications. It is suitable for low-voltage power distribution panels, switchboards and OEM assemblies that require reliable accessory functions and clean panel integration.

1. Product overview

The OVT-X3 is used as a CHINT MCB accessory for final power distribution applications. It is suitable for industrial panels, commercial electrical systems and OEM project requirements.

2. Main features

  • Original CHINT OVT-X3 accessory
  • Product type: Over Voltage Release
  • Compatible with NXB-125
  • Compact structure for panel installation
  • Suitable for distribution boards and OEM assemblies

3. Technical and application notes

Please confirm the compatible breaker series, installation arrangement and project requirement before ordering. If you need help choosing the correct CHINT accessory, we can assist with model matching.

4. Typical applications

  • Final power distribution panels
  • Commercial switchboards
  • Industrial control cabinets
  • OEM panel assemblies
  • Project and wholesale purchasing

5. Ordering support

Send us the breaker model, pole configuration and target market, and we can help confirm the correct CHINT accessory for your project.

6. Product catalog

OVT-X3 catalog page 1

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for CHINT OVT-X3 Over Voltage Release for NXB-125 MCB Accessories.

📥
Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.
Request Official Datasheet (PDF)
📐
2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.
Request CAD Model
Certified Standards: IEC 60898-1, IEC 60947-2, CE, RoHS, ISO 9001:2015
Manufacturer: Shanghai Newtrend Electric Co., Ltd. (Global Export Compliance)
Engineering Support: 24-hour response for custom voltage ratings, auxiliary contacts, and technical consulting.
Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Curve Selection

How to choose between Tripping Curves B, C, and D for this miniature circuit breaker?

A

Curve B trips at 3–5 In (designed for resistive loads, electric heating, and domestic appliances with negligible inrush). Curve C trips at 5–10 In (the standard international choice for residential and commercial lighting, socket outlets, and small induction motors). Curve D trips at 10–14 In (specifically engineered for high-inrush inductive equipment such as industrial transformers, heavy motors, compressors, and welding circuits).

Breaking Capacity

How do I determine whether 6kA or 10kA breaking capacity is required for my installation?

A

Breaking capacity (Icn/Icu) must exceed the calculated prospective short-circuit fault current at the installation point. 6kA (IEC 60898-1) is standard for residential consumer units and sub-distribution branch circuits located downstream. 10kA (IEC 60947-2) is required for industrial facilities, main switchboards, commercial distribution panels, or circuits situated close to supply transformers where fault levels are high.

Poles & Neutral Isolation

How to choose the correct number of poles (1P, 1P+N, 2P, 3P, 3P+N, 4P) for single-phase and three-phase circuits?

A

For single-phase 230V circuits: 1P provides active phase protection; 1P+N or 2P isolates both live and neutral lines simultaneously (essential for TT earthing systems and sensitive sub-panels). For three-phase 400V systems: 3P protects balanced 3-wire motor loads; 3P+N or 4P is required for 4-wire mixed single-phase loads to ensure complete neutral disconnection during isolation.

DC vs AC Application

Can this circuit breaker be used in DC circuits (Solar PV, Battery Storage, Telecom)?

A

Standard AC breakers cannot safely extinguish DC arcs due to the absence of natural zero-crossing current. For DC circuits (60V to 1000V DC), select specialized DC breakers (such as DZ158-125 DC or NM8NDC series) equipped with permanent magnetic arc-blowout chutes and strictly observe polarity wiring to prevent arc re-ignition.

Modular Accessories & Interlocks

What modular accessories and mechanical interlocks can be fitted to this breaker?

A

Standard modular clip-on accessories can be mounted directly on the side without tools: OF (Auxiliary Contact for remote status indication), SD (Alarm Contact for trip fault signaling), MX (Shunt Trip for remote emergency tripping), MN (Under-voltage Release for voltage loss protection), and NXBZ mechanical interlock kits for manual generator/mains transfer switches.

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