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What are the faults of air circuit breakers(ACB)?
1. The air circuit breaker tripped and failed to reclose: First, determine whether the air circuit breaker tripped non-accidentally. Non-accidental tripping means that it tripped without short circuit or overload fault. There are many reasons why the air circuit breaker cannot close. First, it i...Read More -
Knowledge related to dual power automatic transfer switch
Automatic Transfer Switch, referred to as ATS, is a key power switching device used in uninterruptible power supply systems. Its main function is to automatically switch the load to the backup power supply when the main power supply fails to ensure continuous power supply for critical loads. The...Read More -
What material are the contacts of MCCB made of?
The contact material of molded case circuit breaker is mainly silver alloy, which has good electrical conductivity, wear resistance and thermal stability. Silver alloy contacts are often used to ensure the normal operation of circuit breakers and extend their service life. Other commonly used co...Read More -
How to choose a miniature circuit breaker
1. The number of poles for a circuit breaker should be determined based on the number of lines that need protection. For instance, in a typical residential single-phase electrical system, which consists of one neutral wire and one live wire forming a circuit, a two-pole breaker is chosen if both...Read More -
Why do distribution boxes need to be equipped with a surge protective device?
In today’s technologically advanced world, the need for surge protective device (SPD) in distribution boxes cannot be underestimated. Surge protectors play a vital role in protecting electrical and electronic equipment from lightning strikes and overvoltage damage. The high voltage and cur...Read More -
Why does the AC contactor make a buzzing sound?
When the AC contactor is working, it will connect or disconnect the circuit, so arc and corona discharge phenomena will be generated on the contacts, resulting in buzzing noise. When the contacts on the AC contactor connect the circuit, the potential difference due to the resistance will cause a...Read More -
Is the air circuit breaker manual or electric?
The air circuit breaker (ACB) is a relatively complex switch that plays a vital role in electrical systems. A common question that comes up is whether the air circuit breaker is manual or electric. In fact, the answer is not black or white, but a combination of both. The function of the air circu...Read More -
Notes on different circuit locations of CB-level ATS
Automatic Transfer Switches (ATS) play a vital role in ensuring seamless and reliable power transmission during critical situations. Among the different types of ATS on the market, Class CB ATS stands out for its ability to connect, carry and break short-circuit currents while being equipped wit...Read More -
Introduction to molded case circuit breaker tripping
Molded case circuit breaker (MCCB) is an important part of the low-voltage power distribution industry. Its key function is to cut off or isolate fault current within the normal and rated range to ensure the safety of lines and equipment. One of the key aspects of an MCCB is its tripping mechani...Read More -
The meaning of the technical parameters on the miniature circuit breaker shell
The photo of the miniature circuit breaker(MCB) is as follows: The first line: CMTB1-63A indicates that the case current of this miniature circuit breaker is 63A. The case current is the maximum value of the rated current series of this miniature circuit breaker. Second line: C20 indicates that ...Read More -
How surge protectors device(SPD) work
Surge protectors, also known as surge protective devices (SPD), are essential components in any electrical system. They play a crucial role in protecting sensitive electronic equipment from the damaging effects of voltage surges and transients. In this article, we will explore how surge protecto...Read More -
MUTAI CJ19 AC Contactor
Mutai Electric Group’s CJ19 series switched capacitor contactor, referred to as contactor, is an important component in low-voltage reactive power compensation equipment. This contactor is designed for use in AC systems with a frequency of 50Hz or 60Hz, under AC-6b usage category, with a r...Read More
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