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CHINT OUVT-X1 Over-under Voltage Release,
is a protective accessory designe 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.
- 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
