FAQ

A: Yes, we can do the OEM/ODM for the customer.

A: We are factory with many years of professional experience in the field of industrial plug and socket.

A: Our business all over the world, such as USA, European, South America and Africa. We design many classes of product for different customer requirement.

A: It depends on your demands. For small, urgent order, we could arrange the air transportation; it takes about 3-5 days on the way. For most orders, we always arrange the boat shipment through Ningbo/Shanghai port.

A: We could accept L/C, T/T, West Union and even Paypal.

A: Yes, we could offer the small quantity sample for free charge but do not pay the cost of freight.

A: We have the whole inspection system from raw material to end products including temperature rise test, salt spraying test, conductor type test, mechanical life test and so on.

A:An air circuit breaker (ACB) is a vital component in electrical systems, designed to protect circuits from overloads and short circuits. Unlike traditional circuit breakers, which use oil or other mediums, ACBs rely on air as the arc quenching medium. Let's delve deeper into the workings and significance of air circuit breakers.
What are Air Circuit Breakers?
An air circuit breaker is an electrical switching device that operates automatically to protect electrical circuits from damage caused by excess current flow, typically due to overload or short circuit conditions. It disconnects the circuit when abnormal conditions are detected, preventing potential hazards such as fire or equipment damage.
Air circuit breakers play a crucial role in ensuring the safety and reliability of electrical systems. They provide protection against various electrical faults, including overloads and short circuits, thereby safeguarding equipment and personnel.

A: During normal operation, the contacts of the air circuit breaker remain securely closed, facilitating the uninterrupted flow of current through the circuit. This continuous flow of current enables the efficient functioning of electrical devices and systems connected to the circuit. Concurrently, the breaker diligently monitors the magnitude of current coursing through the circuit, constantly assessing it against predetermined safety thresholds. By actively overseeing the current levels, the air circuit breaker ensures that the electrical system operates within its designated limits, thereby promoting stable and reliable performance.
In the event of an abnormal condition such as an overload or a short circuit, the robust tripping mechanism integrated within the air circuit breaker promptly springs into action. Upon detecting the deviation from normal operating parameters, the tripping mechanism swiftly initiates a series of coordinated actions. Primarily, it triggers the disengagement of the contacts, swiftly interrupting the flow of current within the circuit. This decisive action effectively halts the further escalation of current levels, preventing the occurrence of potentially catastrophic consequences such as overheating or electrical fires. By swiftly isolating the faulty section of the circuit, the air circuit breaker plays a pivotal role in safeguarding the integrity of the electrical infrastructure and mitigating the risk of extensive damage. Thus, through its precise and proactive intervention, the tripping mechanism ensures the continued reliability and safety of the electrical system under its guardianship.

A: The low voltage panel boards are installed downstream the MV/LV transformers in underground substations. They ensure the global switching ON/OFF under full load and protect line distribution with calibrated fuses for up to eight feeders.

A: The protection and management of MV/LV transformers in rural areas requires the use of specific circuit breakers adapted to significant load imbalances, and thus guarantees complete power usage even in unbalanced conditions. These devices (4 poles, three of which are protected) use air-break technology with chambers with metal partitions to cut the arc.

A: Selecting the appropriate moulded case circuit breaker involves careful consideration of your specific electrical system requirements. Key factors to consider include:
Load Requirements: Accurately assess the current demands of the circuit to ensure the MCCB's current rating is suitable.
Trip Characteristics: Understand the required trip characteristics (e.g., thermal-magnetic) for effective protection against both overloads and short circuits.
Voltage Rating: Verify that the moulded case circuit breaker's voltage rating meets or exceeds the system's voltage.
Breaking Capacity: Determine the necessary breaking capacity-the maximum fault current the MCCB can safely interrupt-to ensure adequate protection against potential high-fault conditions.

A: MCBs are miniature circuit breakers designed to protect low-current circuits up to 125 amps. They typically have a breaking capacity of up to 10 kA and are designed to trip quickly in the event of a short circuit or overload. MCBs are commonly used in residential and commercial buildings to protect individual circuits, such as lighting and power circuits.
MCCBs, on the other hand, are designed to handle higher levels of current (depending on which current rating you buy) and can protect larger electrical systems and equipment. They also have a higher breaking capacity than MCBs.