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Molded Case Circuit Breaker

The Molded Case Circuit Breaker (MCCB) is a compact circuit protection device integrating overload, short-circuit, and undervoltage protection. Designed for 50Hz/60Hz AC systems with rated voltages up to 690V and currents ranging from 32A to 630A, it features dual-break thermal-magnetic tripping technology. Key highlights include zero arc flash risk, high breaking capacity (Icu=50kA@400V), and modular construction supporting vertical, horizontal, or bottom-entry installation. Certified to CE, CCC, and ISO9001 standards, it ensures reliable circuit isolation and fault protection for industrial power distribution, motor control, and smart building applications.

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Zero Arc Flash MCCB High Breaking Capacity Circuit Breaker Industrial Molded Case Breaker Motor Protection MCCB 690V CE Certified Molded Case Circuit Breaker

Product Advantages

Technical Parameters

Applications

FAQ

1. Pneumatic Arc Extinction Technology

- Combines magnetic blowout and gas pressurization to achieve ≤5ms arc entry into extinction chambers. - 30% faster breaking speed with I²t energy reduced to <20% of conventional models.

2. Zero Arc Flash Safety - Fully enclosed arc chamber eliminates arc projection (0mm flash distance). - IP40 protection rating on operating surfaces ensures personnel and equipment safety.

3. Extended Service Life - 7,000 mechanical operations and 1,500 electrical cycles. - Silver-plated contacts (≥10μm thickness) maintain ≤80μΩ contact resistance.

4. Flexible Configuration - Compact dimensions (140×255×169mm) accommodate diverse installations. - Customizable OVP (overvoltage) and RCCB (residual current) modules.

Parameter

Value

Rated Current (In)

32A-630A

Rated Voltage (Ue)

AC 690V

Breaking Capacity (Icu)

50kA@400V

35kA@690V

Poles

Mechanical Life

7000 operations

Electrical Life

1500 cycles

Mounting Orientation

Vertical/Horizontal/Bottom

Protection Class

IP40

Certifications

CCC

ISO9001

- Industrial power distribution: Overload/short-circuit protection for machinery (e.g., injection molders, CNC equipment).

- Motor control: Suitable for ≤30 daily starts of 7.5kW-300kW motors.

- Smart buildings: RCCB-integrated models enhance safety in commercial complexes.

- Renewable energy: 690V photovoltaic inverter circuit protection.

Q1: Compatible with DC systems?

A: AC-only models. Custom DC versions available (25kA@500V breaking capacity).

Q2: Current rating selection?

A: 3× motor rated current (e.g., 300A MCCB for 100A motor). Match 1:1 for resistive loads.

Q3: Lead time for RCCB modules?

A: 15 days standard, 30 days for non-standard customizations (requires drawing approval).

Q4: Explosion-proof options?

A: Custom Ex d IIC T6 housings compliant with ATEX Directive.

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Hangzhou Liyi Electrical Equipment Co., Ltd. is located in Hangzhou Future Science and Technology City. It is a high-tech enterprise dedicated to the research, production and sales of intelligent power system products.

CONTACT US

+86-13386526575
+86-19157898946
+86-17794526635
info@liyiep.com
Marketing Center Address: Room 509, Building 9, Bafang City, Xixi, Hangzhou City, Zhejiang Province,China
Production Factory Address: 3F, Building 1, No.16 Xianqiao Road, Zhongtai Street, Yuhang District, Hangzhou City, Zhejiang Province, China.

- info@liyiep.com

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