CHINT OUVT-X1 Over-under Voltage Release

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