China OFNC Series 4P Miniature Circuit Breaker Factories, Supplier

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China OFNC Series 4P Miniature Circuit Breaker Factories, Supplier

The OFNC Series 4P (Four-Pole) miniature circuit breaker is a full-pole protection device specifically designed for three-phase, four-wire (3P+N) low-voltage distribution systems. Its design strictly adheres to international electrotechnical standards, including IEC 60898-1. Its core function is to provide synchronized overload and short-circuit protection for the three phase conductors (L1, L2, L3) and the neutral conductor (N) through a built-in, integrated four-pole mechanical linkage mechanism, while also achieving complete electrical isolation of the circuit. This product is a key component for preventing system risks caused by neutral conductor faults or abnormal potential, ensuring power supply safety for sensitive loads, and meeting the requirements of the highest-grade safety isolation standards. It is particularly suitable for power distribution scenarios that have stringent requirements for power supply continuity, operational safety, and system integrity.

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Product Description

Frequently Asked Questions

What is a Miniature Circuit Breaker (MCB)?

A Miniature Circuit Breaker (MCB) is an automatically operated electrical switch designed to protect low-voltage electrical circuits from damage caused by excess current, overload, or short circuits.

What is the difference between 1P, 2P, and 3P Circuit Breakers?

1P (Single Pole) protects a single phase line, suitable for standard household lighting and small outlets. 2P (Double Pole) switches both phase and neutral lines for enhanced protection. 3P (Three Pole) is designed for three-phase equipment and commercial industrial electrical systems.

How do OFNC Series MCBs enhance electrical safety?

OFNC Series MCBs offer rapid response tripping mechanisms, fire-resistant shell materials, and robust arc-extinction capabilities to effectively prevent electrical fires and equipment damage.

Are these circuit breakers easy to install?

Yes, OFNC Series Miniature Circuit Breakers feature standard DIN-rail mounting design, ensuring fast, secure, and straightforward installation in standard distribution boxes.

How do I select the right rating for my circuit breaker?

Selection depends on the total continuous current of the connected loads, the wire gauge used in the circuit, and the specific tripping curve required (e.g., B, C, or D curve).