OUVT-X1 Over-under Voltage Release

OUVT X1 Accessories (Final Power Distribution) Front

OUVT X1 Accessories (Final Power Distribution) Side 1

OUVT X1 Accessories (Final Power Distribution) Side 2

OUVT X1 Accessories (Final Power Distribution)

OUVT X1 Accessories (Final Power Distribution) Front

OUVT X1 Accessories (Final Power Distribution) Side 1

OUVT X1 Accessories (Final Power Distribution) Side 2

OUVT X1 Accessories (Final Power Distribution)

OUVT-X1 Over-under Voltage Release

The OUVT-X1 Over/Under Voltage Release is a protective accessory designed for NXB-63 series circuit breakers, providing precise control against voltage fluctuations. It automatically trips the breaker when the voltage exceeds or falls below safe operating limits, preventing damage to electrical equipment. With a rated operating voltage of 240V AC (50Hz) and a mechanical life exceeding 4000 cycles, the OUVT-X1 ensures stable and reliable protection for residential, commercial, and light industrial power systems.

Product Information

Compatible Devices: NXB-63 series circuit breakers
Rated Operating Voltage (Ue): AC 240V, 50Hz
Over-voltage Operation Setting (Uvo): 280V
Rated Insulation Voltage (Ui): 500V
Tripping Characteristics:
- Trips when voltage drops to 35% Ue or rises to 95–105% of over-voltage setting
- Prevents closing below 35% Ue or above 105% of over-voltage setting
- Normal closing allowed between 85% Ue and 95% of over-voltage setting
- Maximum applied voltage: <110% of over-voltage setting
Mechanical & Electrical Life: ≥4000 cycles (500 each for over/under-voltage trip; 3000 for open/close operations)
Mounting Type: TH35-7.5 steel DIN rail
Installation Position: Left side of circuit breaker
Dimensions (mm):
- Height: 82 ± 0.43
- Width: 18 − 0.43
- Depth: 49.5 ± 0.31
Mounting Hole Spacing: 76 ± 1.2
Protection Function: Trips MCB during under-voltage or over-voltage to protect equipment and circuits

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OUVT-X1-ACCESSORIES-(FINAL-POWER-DISTRIBUTION)-Catalog.pdf

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2025-12-04

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2004-OUVT-X1-Accessories (Final Power Distribution)-Manual.pdf

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2024-09-22

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1912-OUVT-X1-Accessories (Final Power Distribution)-CE Certificate.pdf

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2024-09-22

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OUVT-X1-Accessories (Final Power Distribution)-Drawing-3D.igs

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2024-09-22

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OUVT-X1-Accessories (Final Power Distribution)-Drawing-2D.dwg

2024-09-22

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FAQs

What is the main function of the OUVT-X1?

It provides automatic protection against dangerous voltage fluctuations by disconnecting the circuit breaker during over-voltage or under-voltage conditions, ensuring equipment safety.

Which circuit breakers is it compatible with?

The OUVT-X1 is designed for CHINT’s NXB-63 series circuit breakers, easily attaching to the left side of the unit for fast installation.

How does it determine trip conditions?

Trips when voltage drops below 35% Ue or exceeds 105% of the 280V over-voltage setting.

Allows breaker closure only within safe limits (85%–95% of rated voltage).

How is the OUVT-X1 installed?

It is mounted on a TH35-7.5 DIN rail, connecting directly to the NXB-63 circuit breaker. Installation is quick and requires minimal wiring adjustments.

What is its service life?

The unit has a mechanical and electrical life of over 4000 cycles, ensuring reliable long-term performance under normal and fault conditions.