4P Leakage Miniature Circuit Breaker

The 4P Leakage Miniature Circuit Breaker is a high-performance protection device specially designed for modern circuit safety.

1. Intelligent Fault Identification System: The miniature leakage circuit breaker is equipped with a leakage reset button, which can intuitively distinguish the tripping caused by short circuit, overload, leakage, and the state of manual switching on and off. It helps users quickly locate line fault points, greatly shortens maintenance time, and significantly improves electricity safety and troubleshooting efficiency.

2. Durability and Environmental Adaptability: The miniature leakage circuit breaker adopts a shell made of high-strength and high-temperature-resistant composite materials, with excellent impact resistance, and can operate stably in a wide temperature environment of -20℃~+60℃; the independently developed new lever arc extinguishing mechanism effectively enhances the arc extinguishing capacity. The mechanical life reaches 20,000 times and the electrical life is 2,000 times, far exceeding the standards of conventional products, ensuring reliable and durable long-term use.

3. Humanized Design and Convenient Operation: The red and green dual-color visual window displays the contact status in real time (red for disconnection, green for closing). With clear parameter marks and embedded back rail installation, it is convenient to install and the status monitoring is clear at a glance; the standard test button supports the monthly one-key self-inspection function, which can easily verify the leakage protection performance of the leakage circuit breaker and ensure that the equipment is always in a safe working state.

4. Strict Quality Control: The 4P Leakage Miniature Circuit Breaker complies with international and national standards. From the entry of raw materials to the delivery of finished products, it undergoes multiple precise testing procedures, including high-precision leakage simulation tests and actual breaking capacity tests, to ensure that the leakage protection function of each circuit breaker is accurate and reliable, providing users with comprehensive electricity safety protection.

1. Different Pole Numbers:

• The 2 poles in the 2P Leakage Miniature Circuit Breaker refer to: 1 live wire (L) + 1 neutral wire (N).
• The 4 poles in the 4P Leakage Miniature Circuit Breaker refer to: 3 live wires (L1, L2, L3) + 1 neutral wire (N).

2. Different Wiring Methods:

• The 4P Leakage Miniature Circuit Breaker has four terminals, which can connect three-phase live wires (L1, L2, L3) and neutral wire (N) at the same time, realizing comprehensive control of the three-phase four-wire circuit, and can cut off the three live wires and neutral wire at the same time to ensure that the circuit is completely isolated from power in case of failure.
• The 2P Leakage Miniature Circuit Breaker has only two terminals, which are used to connect the live wire (L) and neutral wire (N) in the single-phase circuit, and can only control the on-off of one live wire and one neutral wire, suitable for 220V single-phase circuits.

3. Different Breaking Capabilities:

• 2P: Can only cut off the phase wire and neutral wire of the single-phase system at the same time to ensure that the circuit is completely powered off (for maintenance safety).
• 4P: Can cut off all three phase wires and neutral wire of the three-phase system at the same time to ensure that the entire three-phase load circuit is completely powered off (for maintenance safety). This is crucial to prevent electric shock risks caused by an unbroken phase during the maintenance of three-phase equipment.

4. Different Applicable Circuits and Voltages:

• 2P Leakage Miniature Circuit Breaker: Only applicable to single-phase 220V circuits (such as household lighting, ordinary sockets, single-phase electrical appliances, etc.), where there is only one live wire and one neutral wire in the circuit.
• 4P Leakage Miniature Circuit Breaker: Applicable to three-phase four-wire 380V circuits, where there are three live wires and one neutral wire in the circuit, with voltages of 380V (between live wires) and 220V (between live wire and neutral wire).

Among the numerous leakage circuit breaker products on the market, the 4P Leakage Miniature Circuit Breaker produced by SDKC has significant competitive advantages.

1. Performance Comparison: Compared with some ordinary leakage circuit breakers, our 4P Leakage Miniature Circuit Breaker has a shorter residual current tripping time, only less than 0.1 seconds, while some similar products may take 0.2 seconds or even longer to act. This tiny time difference can play a decisive role at critical moments, greatly reducing the damage degree of electric shock accidents. In addition, its residual tripping current can reach 10mA, which is more sensitive than many similar products, and can detect tiny leakage currents earlier and take protective measures in time.

2. Function Comparison: The intelligent fault identification system is a major highlight of the 4P Leakage Miniature Circuit Breaker. Other similar products may only be able to simply judge whether leakage occurs, but cannot distinguish the type of fault. The leakage reset button of the 4P Leakage Miniature Circuit Breaker can intuitively distinguish the tripping caused by short circuit, overload, leakage and the state of manual switching on and off, which provides great convenience for users to quickly troubleshoot faults and greatly improves maintenance efficiency. At the same time, its standard monthly one-key self-inspection function is not available in many similar products, which can ensure that the equipment is always in good working condition and avoid potential safety hazards caused by equipment failure.

3. Durability Comparison: In terms of materials and craftsmanship, the 4P Leakage Miniature Circuit Breaker adopts a high-strength and high-temperature-resistant composite material shell, with excellent impact resistance, and can operate stably in a wide temperature environment of -20℃~+60℃. However, some similar products may have their performance affected or even fail in high or low temperature environments. In terms of arc extinguishing capacity, the independently developed new lever arc extinguishing mechanism enables the 4P Leakage Miniature Circuit Breaker to have a mechanical life of 20,000 times and an electrical life of 2,000 times, far exceeding the average level of similar products, which greatly prolongs the service life of the product and reduces the replacement cost for users.

Q: How to test whether the function of the 4P Leakage Miniature Circuit Breaker is normal?

A: 1. Manual test: Press the "test button" on the leakage circuit breaker. If it can trip quickly, it indicates that the leakage protection function is normal. It is recommended to test at least once a month.

2. Professional test: Use a leakage tester to simulate the rated leakage action current (such as 30mA) and observe whether the leakage circuit breaker trips within the specified time (≤0.1s). If there is no response to the test, the circuit breaker must be replaced immediately.

Q: Does the 4P Leakage Miniature Circuit Breaker need to reserve heat dissipation space during installation? Can it be installed side by side with other electrical appliances?

A: 1. When installing the 4P Leakage Miniature Circuit Breaker, it is necessary to follow the installation specifications, leaving at least 5mm of space on the left and right sides, and more than 10mm at the top and bottom to avoid excessive temperature rise due to poor heat dissipation.

2. The 4P Leakage Miniature Circuit Breaker can be installed side by side with other circuit breakers, but it is necessary to ensure good ventilation in the distribution box, especially in the high-temperature environment in summer, attention should be paid to the load current not exceeding the rated value.

Q: Is the neutral wire (N) terminal of the 4P Leakage Miniature Circuit Breaker directional? What should be paid attention to when wiring?

A: 1. The neutral wire terminal of the 4P Leakage Miniature Circuit Breaker is usually non-directional, but some models are marked with "N", which needs to be connected to the neutral wire (must be connected, otherwise the leakage protection will fail).

2. Wiring sequence: The incoming end L1/L2/L3 is connected to the three-phase live wire, and N is connected to the neutral wire; the outgoing end is connected to the load correspondingly. It is strictly forbidden to reverse the live wire and neutral wire (which may cause short circuit or abnormal protection function).

Q: What is the working principle of the leakage circuit breaker?

A: The leakage circuit breaker works by monitoring the current balance in the circuit. Under normal circumstances, the incoming and outgoing currents are equal. If there is a leakage (such as a person getting an electric shock or equipment insulation damage), the current is unbalanced, and the leakage circuit breaker will detect it and trip quickly to cut off the power supply, thereby protecting the safety of personnel and equipment.

Q: How to choose a suitable leakage circuit breaker?

A: The following parameters should be considered when choosing a leakage circuit breaker:

1. Rated current: Choose according to the circuit load, such as 16A, 20A, etc.

2. Rated leakage action current: Usually 30mA, suitable for home and commercial places.

3. Pole number: single-pole, double-pole, three-pole or four-pole, etc., choose according to the circuit requirements.

4. Breaking capacity: It represents the maximum fault current that the circuit breaker can cut off, commonly 6kA and 10kA.

Q: Are you a manufacturer? Do you have your own factory?

A: Yes. We are a professional manufacturer of electrical components, with advanced production equipment and a professional technical team. Friends from all walks of life are welcome to visit our factory at any time to learn about our production process and quality control procedures on the spot.

Q: How about technical support?

A: We will provide you with product manuals or video guidance, and we have professional technical engineers who can communicate with you at any time.

The workshop has established a comprehensive and multi-level quality control system. Starting from the entry of raw materials, each batch of electronic components and metal materials must undergo strict quality inspection, and only raw materials that meet high standards can enter the production process. During the production process, multiple quality monitoring points are set up, and advanced testing equipment is used to conduct real-time testing on semi-finished products. For example, various leakage scenarios are simulated through a high-precision leakage test bench to ensure that the leakage protection function of each leakage circuit breaker is accurate and reliable. Before the finished products leave the factory, they also need to go through strict sampling inspection and full inspection procedures to conduct a comprehensive evaluation of the product's appearance, performance, safety indicators, etc. Only products that 100% meet the quality standards are allowed to enter the market, providing customers with solid quality assurance.

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