3 Pole AC Circuit Breaker

3 Pole AC Circuit Breaker belongs to the category of low-voltage electrical appliances, widely used in industrial, commercial and civil fields, designed for three-phase circuits, can be in the current abnormalities, such as overload, short-circuit conditions automatically cut off the circuit, to protect equipment and personnel safety. Choose PUGAO (Plannter Electric) as your manufacturer and get a factory-direct price.

Product Features

1. Three-Phase Synchronous Control

This 3-pole AC circuit breaker is capable of simultaneously connecting or disconnecting the L1, L2, and L3 three-phase power lines. Should a fault occur in any single phase, the device will trigger a simultaneous power cutoff across all three phases, thereby preventing equipment damage caused by operation under a phase-loss condition.

2. Overload and Short-Circuit Protection

Overload Protection: Utilizes thermal tripping to address sustained excessive current conditions.

Short-Circuit Protection: Employs magnetic tripping to instantly interrupt high-current faults.

By selecting this advanced product, you ensure comprehensive safety protection for your electrical circuits.

3. Enhanced Equipment Operational Safety

This product mitigates risks associated with three-phase voltage imbalances, safeguarding critical equipment—such as motors and compressors—and effectively reducing the costs associated with equipment damage and downtime.

4. Modular Design and Installation

PUGAO products feature a DIN rail mounting design, allowing for seamless integration into power distribution cabinets or control panels. This facilitates efficient batch installation and maintenance within engineering projects.

Key Parameters and Specifications

When purchasing or selecting a product, you may verify the following parameters for the 3-Pole AC Circuit Breaker based on your specific project requirements, or contact us to develop a comprehensive solution tailored to your needs.

Rated Voltage (Ue): Typically 380V, 400V, or 415V AC (for three-phase systems).

Rated Current (In): Common ratings include 16A, 32A, and 63A; high-current models are available up to 100A or 125A.

Breaking Capacity (Icn): Such as 6kA or 10kA. Given the higher energy levels associated with three-phase power, it is recommended to prioritize the 10kA specification to enhance safety redundancy.

Tripping Curve:

Type C: Suitable for office buildings, lighting systems, or general commercial power distribution.

Type D: Specifically designed for motor starting applications, capable of withstanding instantaneous inrush currents of 10 to 14 times the rated current.

Precautions for Use

1. Electrical systems are highly complex. For safety reasons, the operation and installation of 3 Pole AC circuit breakers should be performed by qualified technicians. For example, during operation, first disconnect the load-side power supply, then disconnect the secondary and tertiary sides.

2. Strictly adhere to operating procedures during operation. If any situation arises that affects the normal operation of the electrical system, take emergency measures immediately.

3. After successful installation, the circuit breaker will operate normally. During operation, monitor current data promptly and perform periodic inspections and maintenance.

When is a 3-Pole AC Circuit Breaker Required?

As a professional manufacturer and supplier, PUGAO also offers 1-pole (1P) and 2-pole (2P) circuit breakers; however, regarding product selection, a 3-pole (3P) circuit breaker must be used whenever dealing with three-phase electrical equipment or three-phase power lines. Below are our recommendations for specific scenarios:

1. Three-Phase Motor Equipment

Examples include industrial motors, water pumps, air compressors, etc.

Reason:

Three-phase motors require simultaneous power supply across all three phases. If only a single phase is interrupted while the others remain active, the motor will operate under a "phase-loss" condition; this inevitably leads to the motor burning out, resulting in significant financial loss.

2. Three-Phase Power Supply Systems

Examples include factory power distribution systems, commercial three-phase wiring, three-phase distribution cabinets, etc.

Reason:

The rationale here mirrors that of the equipment category mentioned above: three-phase lines must be switched on and off synchronously. Should an anomaly occur in any single phase, the entire circuit must be disconnected to ensure comprehensive, synchronized three-phase protection.

3. High-Power Industrial or Commercial Equipment

Examples include central air conditioning systems, industrial heating equipment, automated production machinery, etc.

Reason:

Such equipment typically consumes high power and relies on a three-phase supply; consequently, it requires a stable and balanced three-phase current to function correctly.

4. Other Scenarios Requiring Protection Against Phase-Loss Damage

In projects involving such equipment, using 1P or 2P circuit breakers—rather than a 3P unit—creates a risk: if one phase is interrupted while the others remain energized, the equipment will continue to operate, albeit in a compromised and abnormal state.

Please contact PUGAO for specific solution design and technical support services.

FAQ

Q: Does PUGAO offer customization services?

A: Yes, we provide customized service. As a Chinese manufacturer of 3 Pole AC circuit breaker with 14 years of professional experience in the factory, you can customize the parameters such as rated current, breaking capacity and installation method according to the specific needs.

Q: What technical parameters do I need to see?

A: 1. Rated current - must match the actual working current of the load;

2. Rated working voltage - must be the same as the voltage level of the system;

3. Short-circuit breaking capacity - Must be greater than the expected short-circuit current at the point of installation.