Mutai Launches New High-Voltage MCCB for Demanding Power Distribution Applications

As industrial facilities, renewable energy projects, and large-scale power distribution systems continue to demand higher operating voltages and greater reliability, circuit protection devices must deliver superior performance under increasingly challenging conditions. To meet these requirements, Mutai Electric Group introduces the new CMTM8-HU Series High-Voltage Molded Case Circuit Breaker (MCCB), engineered for high-voltage distribution systems with outstanding protection, durability, and operational reliability.

What Is a High-Voltage MCCB?

A Molded Case Circuit Breaker (MCCB) is an essential low-voltage switching and protection device designed to automatically disconnect electrical circuits when abnormal conditions occur. Compared with standard MCCBs, high-voltage models are designed to operate safely at higher system voltages while maintaining excellent breaking performance.

They protect electrical equipment against:

• Overload
• Short circuit
• Undervoltage
• Motor faults
• Distribution system failures

High-voltage MCCBs are widely used in industrial plants, commercial buildings, photovoltaic power stations, energy storage systems, and critical power distribution networks where dependable protection is essential.

Introducing the Mutai CMTM8-HU Series

The CMTM8-320HU, CMTM8-400HU, and CMTM8-630HU are the latest additions to Mutai’s MCCB portfolio, developed for applications requiring higher operating voltages and stable protection performance.

Key Specifications

• Rated operational voltage: 690V / 800V / 1000V / 1140V AC
• Rated current: 100A–630A
• Frame sizes: 320A, 400A, 630A
• Rated insulation voltage: 1250V
• Impulse withstand voltage: 12kV
• 3-pole configuration
• Ultimate breaking capacity up to 60kA at AC690V
• Electrical life: 1,000 operations

Designed for Harsh Operating Conditions

The CMTM8-HU Series is built to operate reliably in demanding environments.

Features include:

• Compact structure with high breaking performance
• Excellent arc-extinguishing capability
• Low power loss for improved efficiency
• Stable operation at elevations up to 2000m
• Operating ambient temperature from -4°C to +70°C
• Suitable for environments with humidity, salt spray, oil mist, and industrial pollution

Temperature and altitude correction data are provided to ensure reliable performance under varying installation conditions.

Compliant with International Standards

The CMTM8-HU Series is designed in accordance with internationally recognized standards, including:

• IEC 60947-1
• IEC 60947-2
• IEC 60947-4
• IEC 60947-5

ensuring dependable quality, safety, and compatibility for global markets.

Power Protection for Modern Industries

Whether protecting photovoltaic systems, industrial machinery, manufacturing facilities, or high-voltage distribution panels, the Mutai CMTM8-HU High-Voltage MCCB delivers the reliability and protection today’s electrical infrastructure demands.

At Mutai Electric Group, we continue to innovate and provide professional low-voltage electrical solutions that help customers build safer, more efficient, and more reliable power systems worldwide.