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NZMN3-4-A500

Key Parameters Category Description / Value Product Line Eaton NZMN3 Accessories Compatible Breakers NZMN3 series air circuit breakers of the specified frame size (Frame 4). Function Undervoltage Release (UVR) Rated Control Supply Voltage (Us) 400-415V AC / 500V AC (as indicated by "A500" suffix). The exact voltage must be confirmed by the order code sticker on the device itself. Mounting Mounts directly onto the compatible NZMN3 breaker. Operation The breaker can only be closed when the supply voltage is present and above the trip threshold. It automatically trips when the voltage drops below the threshold or is lost.

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The Eaton NZMN3-4-A500 is an undervoltage release (UVR) accessory designed for the NZMN3 series of air circuit breakers (ACBs).Its primary function is to automatically trip (open) the circuit breaker when the supply voltage across its terminals drops below a certain threshold (typically 35% to 70% of its rated voltage) or fails completely. This protects equipment from operating at undervoltage conditions (which can damage motors) and prevents the breaker from being closed when power is absent or unstable, enhancing operational safety.