Why Choose the Chint V9 Undervoltage Release?
The Chint V9 is a compact and reliable undervoltage release accessory designed to protect electrical loads by automatically tripping compatible Chint miniature circuit breakers and RCBOs when the supply voltage drops below a safe operating level. It helps prevent unsafe operation, equipment damage and unexpected restart conditions caused by voltage loss or significant voltage reduction.
Designed for use with compatible Chint NB1, NBH8, NB1L and NBH8LE series protective devices, the V9 mounts to the left-hand side of the MCB or RCBO using a dedicated pin interface. It is suitable for residential, commercial and industrial distribution boards where undervoltage protection and positive safety operation are required.
With a rated control voltage of AC 230 V 50/60 Hz, the Chint V9 prevents breaker closing when the voltage is too low, trips the connected device during undervoltage conditions and allows reliable operation when the voltage returns to the normal operating range.
Key Advantages
- Compact undervoltage release accessory for Chint MCBs and RCBOs.
- Trips the connected breaker when supply voltage drops below safe limits.
- Helps protect electrical loads against undervoltage conditions.
- Compatible with selected NB1, NBH8, NB1L and NBH8LE series devices.
- Rated for AC 230 V 50/60 Hz control circuits.
- Simple left-side mounting with dedicated pin connection.
Key Features
- Chint V9 undervoltage release accessory.
- AC 230 V rated operating voltage.
- Prevents breaker closing below 35% of rated voltage.
- Trips the connected device when voltage falls between 70% and 35% of rated voltage.
- Allows reliable operation between 85% and 110% of rated voltage.
- Rated insulation voltage of 500 V.
- Rated impulse withstand voltage of 4 kV.
- Manufactured in accordance with IEC/EN 60947-5-1.
Reliable Undervoltage Protection for Electrical Loads
Undervoltage releases such as the Chint V9 are used to open a connected protective device when the supply voltage falls below an acceptable level. This helps prevent motors, control equipment and connected electrical loads from operating under unsafe voltage conditions.
The V9 also provides positive safety by preventing the connected breaker from being closed when the voltage is too low. This makes it particularly useful in control panels, building services systems and distribution boards where safe restart behaviour and undervoltage protection are important.
Typical Applications
- Undervoltage protection for compatible MCBs and RCBOs.
- Residential and commercial distribution boards.
- Industrial control panels and machine panels.
- Building management and electrical safety systems.
- Emergency stop and voltage loss protection circuits.
- Motor, pump and control equipment protection.
