UVT-X3 Under-voltage Release

UVT X3 Accessories (Final Power Distribution) Front

UVT X3 Accessories (Final Power Distribution) Side

UVT X3 Accessories (Final Power Distribution)

UVT X3 Accessories (Final Power Distribution) Front

UVT X3 Accessories (Final Power Distribution) Side

UVT X3 Accessories (Final Power Distribution)

UVT-X3 Under-voltage Release

The UVT-X3 Under-voltage Release is an intelligent protection accessory for the NXB-125 series circuit breaker, designed to automatically trip the breaker when voltage drops below a safe level. With a rated operating voltage of AC 240 V, insulation voltage of 500 V, and a service life exceeding 4000 cycles, it ensures quick and reliable undervoltage protection. Compact, easy to install on a TH35-7.5 DIN rail, and fully compliant with CHINT safety standards, the UVT-X3 guarantees enhanced system stability and operator safety.

Product Information

Function: Trips circuit breaker automatically under low-voltage conditions to prevent equipment malfunction
Applicable Breaker: NXB-125 series
Rated Operating Voltage (Ue): AC 240 V
Rated Insulation Voltage (Ui): 500 V
Operating Life: ≥ 4000 cycles
Action Characteristics:
- ≤ 35 % Ue → Prevents breaker closure
- 35–70 % Ue → Trips breaker open
- ≥ 85 % Ue → Allows breaker closing
- Voltage must not exceed 110 % Ue
Mounting Type: TH35-7.5 steel DIN rail
Assembly Location: Installed on the right side of NXB-125 breaker (after removing cover)
Dimensions (mm): H = 81 ± 1.4; W = 18 ± 0.3; D = 75.2 ± 1.2; Mounting holes 43.5/45 ± 0.3; Base width 50.5 ± 0.3
Mounting Orientation: Vertical installation preferred

Name

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UVT-X3-ACCESSORIES-(FINAL-POWER-DISTRIBUTION)-Catalog.pdf

277.34KB

2025-12-24

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2004-UVT-X3-Accessories (Final Power Distribution)-Manual.pdf

447.65KB

2024-09-22

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Release time

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UVT-X3-Accessories (Final Power Distribution)-Drawing-2D.dwg

102.72KB

2024-12-17

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UVT-X3-Accessories (Final Power Distribution)-Drawing-3D.stp

4.38MB

2024-12-17

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FAQs

What is the function of the UVT-X3 Under-voltage Release?

It automatically trips the NXB-125 circuit breaker when the voltage falls below 35 % of its rated value, preventing unsafe operating conditions and protecting connected loads.

How does the UVT-X3 behave under voltage fluctuations?

When voltage is between 35 % and 70 % of Ue, the breaker trips open; below 35 % Ue it cannot close, and normal operation resumes once voltage exceeds 85 % Ue (never beyond 110 % Ue).

Which circuit breakers are compatible with UVT-X3?

The UVT-X3 is designed for the NXB-125 series MCBs, ensuring precise mechanical fit and optimal electrical performance.

How is the UVT-X3 installed?

Remove the right-side cover of the NXB-125 breaker, attach the UVT-X3 module, and mount the assembly on a TH35-7.5 steel DIN rail.

What is its expected operational life?

The UVT-X3 is rated for at least 4000 operating cycles, offering long-term reliability for commercial and industrial installations.