OEM OFL7 Series 3P Miniature Circuit Breaker Manufacturers, Manufacturer

1 / 3

OEM OFL7 Series 3P Miniature Circuit Breaker Manufacturers, Manufacturer

The OFL7 Series 3P (Three-Pole) miniature circuit breaker is a high-performance overcurrent protection device specifically designed for three-phase, low-voltage AC power distribution systems. Its design and manufacturing strictly adhere to international electrotechnical standards, including IEC/EN 60898-1. Its core function is to provide synchronized, reliable overload and short-circuit protection for balanced and unbalanced three-phase loads through a built-in three-pole mechanical linkage mechanism, while also achieving complete electrical isolation of the circuit. This product is a key core component for preventing damage to three-phase equipment, such as motors and compressors, from single-phasing operation. It ensures the stable and safe operation of three-phase power systems in industrial, commercial, and infrastructure fields.

Send Inquiry

Product Description

Frequently Asked Questions

What is the main function of an OFL7 Series Miniature Circuit Breaker (MCB)?

The OFL7 Series Miniature Circuit Breaker is designed to protect electrical installations against overloads and short circuits. It automatically cuts off power when abnormal current flow is detected, preventing electrical fires and equipment damage.

What is the difference between 1P, 2P, and 4P circuit breakers?

1P (Single Pole) protects a single live wire in a single-phase circuit; 2P (Double Pole) disconnects both live and neutral wires for added safety; 4P (Four Pole) is designed for three-phase four-wire systems to protect three live lines and the neutral line simultaneously.

How do I choose the correct current rating for an MCB?

Select an MCB rated for the maximum continuous operating current of your circuit. The breaker's current rating should be equal to or slightly higher than the maximum load current, but lower than the safe carrying capacity of the circuit wiring.

What causes an MCB to trip repeatedly?

Frequent tripping is typically caused by circuit overload (connecting too many electrical appliances), a short circuit somewhere in the wiring, or a malfunctioning electrical device connected to the line.

Are OFL7 Series MCBs suitable for standard DIN rail installation?

Yes, OFL7 Series Miniature Circuit Breakers feature a standard modular design compatible with standard 35mm DIN rails, making them easy to install inside distribution boxes and enclosures.