Chint OUVR-2 Over Voltage and Under Voltage Protector Chint OUVR-2 Over Voltage and Under Voltage Protector
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Chint OUVR-2 Over Voltage and Under Voltage Protector Chint OUVR-2 Over Voltage and Under Voltage Protector
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Chint OUVR-2 Over Voltage and Under Voltage Protector

Brand Name:Chint
Place of Origin:China
Model Number:OUVR-2
Rated Voltage
Protection Type
SKU: 1769744521173671936 Category: Chint MCB

Where to Use OUVR Over/Under Voltage Protector?

The Chint OUVR-2 Over Voltage and Under Voltage Protector 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

ModelOUVR
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 OUVR 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
  • Additional information
  • Technical Datasheet & Downloads
  • Technical FAQ & Selection Guide
Description

Chint original OUVR-2 230V 400V 1P+N 3P+N 32A 40A 50A 63A 80A Chnt Self recovery over voltage and under voltage protector

   

Chint OUVR-2 Self-recovery Overvoltage and Undervoltage Protector

 

1. Product Features
1.1 Preventing misoperation: Where sudden transient or temporary overvoltage occurs in the line, the protector will not generate misoperation; when the line suffers instable voltage or sudden power recovery after sudden power disruption due to loose contact or other fault, the protector will not close the circuit;
1.2 Reliable operation: Protection is characterized by inverse time lag operation with operating time≤1s;
1.3 Wide scope of voltage protection: 0~450V; in case of maximum fault voltage, the protector itself will not be damaged; Safer, impulse withstand voltage: 4kV (conforming to the safety standard of category Ⅲ electrical apparatus);
1.4 Condition indication: The protector has the LED to indicate the operating state, where green is normal voltage indication, and red is overvoltage or under voltage indication;
1.5 The product is easy for installation with cable from bottom feed;
1.6 The product only has 27mm with small size;
1.7 External modular design, DIN rail mounting.

 

2. Scope of Application

2.1 OUVR-2 self-recovery overvoltage and undervoltage protector is a new type of intelligent protection apparatus. With the modular standard design, in case of overvoltage or undervoltage of power supply line, the protector can quickly and safely break the circuit under continuous high voltage surge, avoiding the happening of an accident due to abnormal voltage entry into the terminal apparatus; when voltage resumes normal value, the protector will automatically close the circuit within the specified time to
ensure the terminal apparatus can operate normally in an unattended way.
2.2 OUVR-2 self-recovery overvoltage and undervoltage protector is applied for the users or loads of AC 230V, 50Hz and rated operating current 80A and below. It is mainly used in the household distribution box or other distribution line requiring protection.

Additional information
Rated Voltage

AC 230V

Protection Type

Over Voltage, Under Voltage

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Chint OUVR-2 Over Voltage and Under Voltage Protector.

📥
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.

Voltage & Load Sizing

How to verify rated operational voltage, frequency, and load duty cycle?

A

Verify that the nominal line voltage (AC 230V single-phase or 400V/415V/690V three-phase at 50/60Hz, or DC voltage ratings) falls within the continuous maximum operating limits of the device. Check duty cycle ratings (continuous vs intermittent duty) to ensure thermal stability under full load.

Protection & Environment

What ingress protection (IP Rating) and environmental enclosures are recommended?

A

For clean indoor electrical rooms, standard IP20 modular DIN-rail housings are recommended. For outdoor, industrial washdown, or dusty environments, mount components inside weatherproof enclosures rated IP65/IP66 with UV-resistant polycarbonate or powder-coated steel enclosures equipped with compression cable glands.

Selectivity & Grading

How to ensure upstream and downstream coordination in power distribution boards?

A

Ensure proper discrimination by grading current thresholds and tripping time delays: upstream devices should have higher current ratings and intentional short-time delays (Class S), allowing downstream branch MCBs to clear localized faults without blacking out the entire facility.

Installation & Mounting

What mounting rails, busbars, and spatial clearances are required?

A

Components mount on standard symmetrical 35mm DIN rail (EN 60715 / TH35-7.5) or backplate screw fixings. Maintain recommended top/bottom ventilation gaps (typically 30–50mm) to ensure unrestricted air convection, and use standard pin/fork comb busbars to minimize contact resistance and wiring errors.

Conductor & Torque Sizing

What conductor sizes and terminal tightening torques should be applied?

A

Select copper or aluminum conductor cross-sections complying with IEC 60364-5-52 current-carrying capacity tables based on continuous load. Always use a calibrated torque screwdriver or torque wrench to tighten terminal screws to the manufacturer-specified torque to prevent hot-spot degradation and loose connections.

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