What is MA in Schneider circuit breaker

MA stands for electromagnetic tripper, which is generally used in the motor protection circuit, and uses the principle of electromagnetic coil induced impulse current to achieve instantaneous protection, and the protection action current value is generally high to avoid the peak value of motor starting.

It should be noted that the circuit breaker with this tripper does not have built-in overload protection, and if overload protection is required, it should be implemented by configuring thermal relay externally.

It refers to the rated leakage action current, which is generally 30mA for household use, and 50mA, 75 100 200 for larger use

It should be understood as tripping sensitivity.

The circuit breaker is equipped with a magnetic tripper specially designed for short-circuit protection of motor circuits.

In Schneider circuit breaker, MA stands for electromagnetic tripper.

Schneider Electric is a switchgear that can close, carry and break current under normal loop conditions, and can close, carry and break current under abnormal loop conditions (including short circuit conditions) for a specified period of time. Mainly to provide customers all over the world with perfect solutions, a full range of products and components and thoughtful service.

Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use, and the division of high and low voltage boundaries is relatively blurred, and generally more than 3kV is called high-voltage electrical appliances. Low-voltage circuit breaker, also known as automatic switch, is commonly known as"Air switch"It also refers to the low-voltage circuit breaker, which is an electrical appliance that has both manual switching function and automatic loss of voltage, undervoltage, overload, and short circuit protection. It can be used to distribute electric energy, start asynchronous motors infrequently, protect power lines and motors, and automatically cut off circuits when they occur serious overload or short circuit and undervoltage and other faults, and its function is equivalent to the combination of fuse switches and over/underheat relays.

In addition, it is generally not necessary to change parts after the fault current is broken, and it has been widely used.

TM-D is a thermomagnetic tripper for a molded case dedicated to power distribution. The MA is a single magnetic tripper, that is, only a magnetic trip. The molded case circuit breaker automatically shuts off the current when it exceeds the trip setting.

MCCBs usually contain a thermomagnetic trip unit, while larger MCCBs are equipped with a solid-state trip sensor. Its tripping unit is divided into: thermomagnetic tripping and electronic tripping.

The main contact of the low-voltage circuit breaker is either manually operated or electrically closed. After the main contact is closed, the free trip mechanism locks the main contact in the closing position. The coil of the overcurrent tripper and the thermal element of the thermal tripper are connected in series with the main circuit, and the coil of the undervoltage tripper and the power supply are connected in parallel.

Dear, I'm glad to answer for you: Schneider circuit breaker A: Hello, dear:

1. Protection: Schneider motor circuit breaker can be set by using a dial. 2. Overload and thermal protection (IR):

The overload reversal thermal protection is carried out with adjustable contact electric IR, which is set over a wide range in amperes, indicating that the thermal protection trip curve of the trip delay TR is defined by the selected trip class. 3. Trip level: the starting time of level 10 is less than 10 seconds, and the starting time of level 20 is less than 20 seconds.

For a given class, it is necessary to check that all the motor feeder components are sized enough to pass the starting current and that they are heating up too much for the time that the class is in sync with the beat. 4. Short-delay protection (ISD): The short-delay protection of the motor circuit breaker is about 100ms, which allows the motor starting current to pass through and protects the cable and motor starting equipment so that it does not exceed the corresponding current range (this is especially useful for setting circuit breakers in a wide range), and the fixed set current ISD = short-circuit protection (II):

For instantaneous protection current unadjustable II = phase unbalance or lack of phase (iunbal, tunbal): if phase imbalance occurs, this function will be Schneider circuit breaker, i.e. higher than 30% of the fixed contact current of the IRMS iunbal, unadjustable delay tunbal is equal to the starting device, 4S during normal operation phase loss is an extreme case of phase imbalance, tripping under the same conditions. 7. Ground fault protection (IG, TG):

Leakage type ground fault protection fixed current ig = in, fixed delay tg = positive indicator: green "ready" LED is to flash slowly when the faulty motor circuit breaker is ready to trip, red alarm LED is to light up when the thermal image of the motor is greater than 95% of the allowable temperature rise standards and certifications: IEC EN 60947-1, IEC EN 60947-2, IEC EN 60947-4-1, UL 60497-4-1, CSA N 60497-4-1、ccc、eac、csa（ccsaus）。

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As a product of Schneider Electric Company, Schneider circuit breaker has shown its own advantages in the market competition. As a Fortune 500 company, Schneider not only has a large number of electrical products, but also has a good quality assurance. Schneider circuit breakers are well sold in France and even in other countries abroad, which is due to its own attractiveness.

(1) Analysis of the quality of Schneider circuit breakers

1 Since the 19th century, Schneider has been in the competitive market for electrical products. Over the years, it has experienced challenges and made strategic choices that have laid a solid foundation for its products.

2 In the process of long-term development, Schneider Electric has accumulated a lot of experience. These experiences are characteristic of each period and have the merits of each period. Years of collation and analysis have made these experiences a good way to promote the manufacture of products.

The manufacture of Schneider circuit breakers is also a good combination of these experiences. It itself contains the painstaking efforts of generations of technology research and development personnel, and also contains the characteristics of the era of empty scum left by the passage of time.

3 Schneider Electric merged and united many upstream enterprises during its development, and at the same time tried to cooperate with downstream enterprises. In this way, the quality of Schneider circuit breaker raw materials is well guaranteed, and the specifications and quality of parts are also ensured. At the same time, the transportation also ensures that the product is not damaged.

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Schneider Electric, as a relatively well-developed large company, has solved the user's worries with its after-sales service and maintenance work. The perfect service system and good maintenance level can quietly highlight the image of Schneider circuit breaker itself in people's minds from a side perspective. In the process of sales, the high-quality service attitude and safe packaging methods ensure that the quality of the product itself is not damaged, so that users can use it safely and securely.

(3) Advantages and proof of Schneider circuit breaker

There are many types of Schneider circuit breakers, which are generally divided into miniature circuit breakers, molded case circuit breakers, frame circuit breakers, etc. Its safety performance is relatively high, and the safety factor is within the scope of the permission of the relevant departments, and it is produced in strict accordance with the regulations, and has relevant licenses. Moreover, in the process of development, Schneider circuit breaker has been continuously praised by users, and even won some good honorary titles and certificates.

These are strong evidence of Schneider circuit breakers.

Circuit breaker is indispensable in our lives, it solves the dangerous problem of electricity very well, and greatly reduces the coefficient of electrical accidents. Like other circuit breakers, Schneider circuit breakers have provided great help to people's lives, and in the process of user use, relevant evaluations have been made on it, and these evaluations in turn promote its own improvement and development.

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