Home Recloser & Remote Controller MT66UV Self-Resetting Overvoltage and Undervoltage Circuit Breaker

MT66UV Self-Resetting Overvoltage and Undervoltage Circuit Breaker

MT66UV

The MT66UV self-resetting voltage protector circuit breaker is designed for low-voltage power distribution in distributed photovoltaic systems. It continuously monitors supply voltage and automatically disconnects the circuit when an overvoltage, undervoltage, or voltage-loss condition is detected. When the voltage returns to the normal operating range, the device can automatically restore the circuit in Auto mode. By combining voltage monitoring, circuit protection, automatic opening and reclosing logic in one DIN-rail device, MT66UV helps reduce manual reset work and improves power recovery for photovoltaic distribution systems.

• 2P and 4P Options for Single- and Three-Phase Systems
• Automatic Overvoltage & Undervoltage Protection
• Automatic Power Recovery After Voltage Normalization
• Auto and Manual Operating Modes
• Integrated Circuit Breaking and Voltage Monitoring
• Clear Fault and Operating Status Indication

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Features & Advantages

feature

Automatic Voltage Protection

MT66UV continuously monitors the supply voltage and automatically disconnects the circuit when overvoltage or undervoltage occurs, helping protect downstream equipment from abnormal voltage conditions.

Automatic Power Recovery

When the voltage returns to the normal range, the circuit can automatically reclose in auto mode, reducing manual reset work after temporary voltage disturbances.

Flexible Auto & Manual Modes

Users can switch between Auto and Manual modes depending on operating requirements, allowing either automatic power restoration or controlled manual recovery.

Integrated DIN-Rail Design

Voltage monitoring, circuit protection and automatic reclosing functions are integrated into one compact DIN-rail device, simplifying distribution panel design and installation.

Target

Application Areas

01
Residential Rooftop PV Systems

Protect photovoltaic distribution circuits against temporary overvoltage and undervoltage conditions while automatically restoring power after voltage normalization.
02
Commercial & Industrial Solar Installations

Improve voltage fault response in low-voltage PV distribution panels and reduce unnecessary manual breaker reset work after temporary grid disturbances.
03
Remote and Unattended PV Sites

Automatic voltage detection and power recovery help reduce on-site intervention for photovoltaic systems installed in remote or difficult-to-access locations.
04
PV Distribution Panels

Integrate voltage protection, circuit breaking and automatic recovery into a compact DIN-rail solution for new photovoltaic distribution panel designs.