IEC MCCB Moulded Case Circuit Breakers 3 Pole 4 Pole Main Switch Circuit Breakers

The HMM1 Series MCCB is a high-performance circuit protection solution designed for AC 50/60Hz networks with rated voltages up to 690V. It is engineered to provide reliable protection against overloads and short circuits in diverse electrical environments, ranging from industrial manufacturing plants to commercial building distribution boards.

With a current range spanning from 63A to 800A, the HMM1 series offers a compact design with high breaking capacity. It is an ideal choice as a Main Switch in power distribution cabinets, providing the critical first line of defense for your downstream electrical infrastructure.

• High Breaking Capacity (Icu): Available in standard (S) and high-breaking (H) types, ensuring the breaker can safely interrupt high fault currents without damaging the system.

• Optimized Thermal-Magnetic Trip: Features a precision-calibrated thermal-magnetic unit that provides sensitive overload protection and instantaneous short-circuit response.

• Superior Arc Extinguishing: Built with advanced arc-chute technology that rapidly cools and extinguishes electrical arcs, significantly extending the service life of the contacts.

• Modular Accessory Compatibility: Supports a full range of field-installable accessories, including Shunt Trips (MX), Under-Voltage Releases (MN), Auxiliary Switches, and Alarm Contacts.

• Rugged Thermoset Housing: The enclosure is made from high-strength, flame-retardant material that maintains structural integrity under high-temperature fault conditions.

1. Industrial Distribution: Protecting motors, transformers, and feeder circuits in factories and processing plants.

2. Commercial Real Estate: Main circuit protection for shopping malls, office towers, and hotel electrical rooms.

3. OEM Panel Building: Integration into Low-Voltage Switchgear and Motor Control Centers (MCC).

4. Renewable Energy: Reliable isolation and protection for solar AC combiner boxes and battery storage systems.

• Wenzhou Quality Manufacturing: Produced in the world's leading electrical hub, our breakers offer an optimal balance of high-end performance and cost-effectiveness.

• Versatile Mounting: Designed for both vertical and horizontal installation without derating, providing maximum flexibility for compact panel designs.

• Easy Maintenance: Features a clear "Trip/Off/On" status indicator on the handle and a dedicated "Push-to-Trip" button for routine functional testing.

• Silver Alloy Contacts: Utilizes high-grade silver alloy contacts to ensure low contact resistance and excellent conductivity over thousands of switching cycles.

Q: Can this breaker be used for DC applications?

A: The HMM1 series is primarily designed for AC distribution. For DC solar or battery applications, please contact us for our specialized HMM1-DC series.

Q: Do you offer the 4-Pole version with a protected neutral?

A: Yes. We offer 4P configurations with both protected and non-protected neutral poles to meet different regional earthing and safety standards.

Q: Is it possible to use a rotary handle or motor operator with this series?

A: Absolutely. We provide extended rotary handles for door mounting and electric motor operators for remote switching and automation requirements.

MCCB Moulded Case Circuit Breaker

HMM1 plastic shell type circuit breaker, suitable for AC 50HZ, rated voltage 690V, rated working current from 63A to 800A distribution network circuit, used to distribute power and protect lines and power equipment from overload, short circuit, undervoltage and other faults damage. At the same time, it can also be used as the motor's infrequent start and overload, short circuit, undervoltage protection.

HMM1 circuit breaker has the characteristics of small size, high breaking capacity, short fly-arc, beautiful appearance, can be installed vertically, can also be installed horizontally, but also has the isolation function, is a user's favorite product.