Name: V9 Undervoltage Release
Brand: Chint

V9 Undervoltage Release

The V9 Undervoltage Release is a safety accessory designed for NB1, NBH8, NB1L, and NBH8LE series miniature circuit breakers and RCBOs. It provides reliable load protection during voltage drops, automatically tripping the breaker when voltage falls below 35% of the rated value. Operating at AC 230V 50/60Hz, the V9 ensures positive safety, rapid fault response, and mechanical durability exceeding 4000 cycles. Easy to install on the left side of MCBs/RCBOs, it’s ideal for residential, commercial, and industrial power systems.

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FAQs

What is the primary purpose of the V9 Undervoltage Release?

It protects electrical loads by automatically tripping the connected breaker when voltage drops below a critical threshold, preventing damage and unsafe operation.

What circuit breakers are compatible with the V9?

The V9 is specifically designed for CHINT’s NB1, NBH8, NB1L, and NBH8LE series, ensuring perfect fit and consistent performance.

How does the V9 respond to voltage variations?

When voltage falls below 35% of rated voltage (Ue), it prevents breaker closure; between 35%–70%, it triggers a trip, and between 85%–110%, it allows reliable operation.

How is the V9 installed?

It mounts on the left side of the circuit breaker via a special pin connection, ensuring simple installation without wiring modifications.

What is the V9’s operational lifespan?

It provides a long service life of over 4000 mechanical and electrical operations, making it a dependable accessory for long-term use.

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V9 Undervoltage Release

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