Is there any attention to the selection of leakage protection circuit breaker?

Although I know, this thing is too complicated to explain, not a professional, can you understand those technical parameters? I still trust big brands, like Siemens, it's good, I'm doing engineering, and I recently took over a community, all of which are equipped with this.

There is no difference, leakage protector, referred to as leakage switch, also known as leakage circuit breaker.

The differences between leakage protectors and air switches are:

1. Different forms of control.

The leakage protector will only be disconnected when someone touches the line and causes an electric shock accident.

2. The principle of power failure is different.

The air switch is disconnected by determining whether the loop current is short-circuited.

Leakage protector, when a person touches the fire line, the person and the fire line form a state of "people, fire, ground", at this moment only the fire wire has current, then the electromagnetic will produce magnetic force, and the switch is disconnected.

3. The objects of protection are different.

The air switch plays the role of protecting the equipment.

Leakage protectors play a role in protecting the human body.

4. The role is different.

The leakage protector has an on-off effect on the current, which can cut off the load current, but cannot cut off the short-circuit current, and has no overload protection and short-circuit protection functions.

The air switch has an on-off effect on the current, which can cut off the load current, overload current and short-circuit current, and is mainly used for overload protection and short-circuit protection.

5. The application is different.

Air switches are generally used in industry.

Leakage protectors are often used in residential and household electricity.

Leakage protection circuit breaker is based on the circuit breaker to add a leakage protection tripper, the domestic DZ47 circuit breaker and DZ47LE leakage protection circuit breaker shape is the width of the left and right direction of the size increased, and later refer to the product appearance of ABB, Siemens and Schneider, the leakage protection trip device is made smaller, the new type of leakage protection circuit breaker and circuit breaker in the shape of the difference is very small, the air switch is the circuit breaker, the circuit breaker is called the air switch at the earliest, Later, the national standard was in line with the international technical standard, and the corresponding technical term was changed to circuit breaker

Leakage protector is a general term for leakage circuit breaker and leakage switch. There is no difference from the name, but in terms of protection function, some leakage protectors have leakage, short circuit, and overload protection, and some only have leakage protection functions, such as the common old product DZL18 type. The leakage protector is a "residual current action circuit breaker" in accordance with the requirements of the national standard, and the product is uniformly labeled as a "leakage circuit breaker" on the nameplate of the outer cover.

Leakage circuit breakers can be used to protect against contact, but not against direct electric shock. Whereas, leakage circuit breakers can be used as protection against both indirect and direct electric shocks.

Hope it helps.

All have short-circuit over-current protection function, but the leakage protector can trip quickly when the leakage current exceeds to protect electrical appliances and personal safety, the general leakage current is about 30 milliamperes, and the action time is also very short, which can effectively protect but the circuit breaker will trip when it only short-circuits or exceeds the rated current.

What you are talking about is just an extension of the product "circuit breaker", the leakage circuit breaker is based on the circuit breaker to add a leakage protection function, 30 mA and below the specifications are directly protected from human safety, more than 30 mA is indirect protection of human shock. Circuit breakers and air switches are different in name. Hope it helps.

Electrician knowledge: how to distinguish between an air switch and a leakage protector? What's the difference?

Leakage protection has more leakage function, and the rest is the same as that of circuit breakers.

Leakage circuit breakers are not the same as leakage protectors. 1. Circuit breaker: The circuit breaker is a switch that controls the electrical circuit, if the air is the arc extinguishing medium, it is called the air circuit breaker (switch), and if the SF6 gas is the arc extinguishing medium, it is called the sulfur hexafluoride circuit breaker (switch).

The circuit breaker is generally selected based on the rated current (load) and is used as the main switch of the electrical circuit. When the rated current is exceeded, it will be automatically disconnected.

2. Leakage protector: Leakage protector is a kind of protective electrical appliance that detects the size of the phase line leakage or electric shock current that occurs in the protected power grid, and is used as a protective appliance to send an action trip signal and complete the action trip task. In the low-voltage power grid with leakage protectors, under normal circumstances, the leakage current of the grid phase line to the ground (or the unbalanced leakage current in the three-phase power grid) is small, and the action current value of the leakage protector cannot be reached, so the leakage protector does not operate.

When a fault such as leakage or personal electric shock occurs in the protected power grid, when the current of the detection element through the leakage protector reaches its leakage or electric shock action current value, the leakage protector will have the instruction of action tripping, so that the main circuit switch controlled by it trips and cuts off the power supply, so as to complete the task of leakage or electric shock protection.

3. Leakage circuit breaker: (commonly known as leakage switch) has two types: electromagnetic and electronic, and its working principle is to detect the residual current, compare the residual current value with the remaining action current value, and disconnect the protected circuit when the residual current exceeds the value.

When decorating home circuits, many accessories need to be used, and circuit breakers and leakage protection are two of the more common. For these two accessories, many people are easily confused and do not understand what the difference is between them. So, let's take you together to understand the difference between circuit breaker and leakage protector and the precautions for purchasing leakage protector.

What is the difference between a circuit breaker and a leakage protector.

They will be different mainly in terms of function, for the circuit breaker, it plays a protective role in the safe operation of the circuit, it can cut off the faulty circuit in time, and turn on the load circuit to prevent the occurrence of circuit accidents. The leakage protector not only has the function of leakage current detection, but also has the function of judgment, which can better protect the operation of the circuit.

Precautions for the purchase of leakage protectors.

1. In the process of purchasing leakage protectors, brand products should be preferred, because the quality is more guaranteed. For us, it is optional.

Second- and third-tier brands, ** is also relatively moderate, not too expensive, and the quality also has a certain guarantee. Do not try to buy some unknown brands cheaply, and relatively cheap leakage protectors, because the merchants of these products, in the production process, in order to reduce the production cost, usually use some first-class materials to make, not only the production process is rough, and the use time is short, the most important thing is that it does not play a role in protection.

2. When purchasing leakage protectors, you also need to choose according to the size of the electrical appliances and wires used at home, otherwise it is easy to trip or burn the terminal posts. Generally speaking, if the power of the induction cooker used at home is high, then you should also choose a leakage protector of the corresponding size, otherwise there will be problems such as short circuit when using.

Leakage protector, referred to as leakage switch, also known as leakage circuit breaker, is mainly used in the event of leakage failure of equipment and personal electric shock protection with fatal danger, with overload and short circuit protection functions, can be used to protect the overload and short circuit of the line or motor, and can also be used as an infrequent conversion start of the line under normal circumstances.

The short-circuit protector is the current flowing through the power system when there is an abnormal connection (i.e., short circuit) between phases or between phases and ground (or neutral wire) during operation. Its value can be much greater than the rated current and depends on the electrical distance of the short-circuit point from the power supply.

To put it simply, the leakage protector is an upgraded version of the circuit breaker, which has one more leakage trip than the circuit breaker, so there is a leakage trip, and an overload short circuit trip, and the circuit breaker is an overload and short circuit trip.

If the leakage protector forms an abnormal circuit between the phase wire and the ground wire, and the current is greater than 30mA, it will operate. Circuit breaker means that the total current of normal operation is greater than the allowable rated current, that is, the operation.

The same device is called differently. According to the "purpose" is called the leakage protector.

Electric shock safety device, according to the "principle" is called leakage circuit breaker, leakage switch, residual current circuit breaker.

protector).

The main differences between leakage protector and circuit breaker in terms of function are: 1. The function of circuit breaker is equivalent to the combination of fuse switch and over/underheating relay. The leakage protector has the function of overload and short circuit protection, which can be used to protect the overload and short circuit of the line or motor, and can also be used as an infrequent conversion and start of the line under normal circumstances.

2. The function of low-voltage circuit breaker is equivalent to the sum of some or all the functions of electrical appliances such as knife switch, overcurrent relay, loss of voltage relay, thermal relay and leakage protector, and is an important protective appliance in the low-voltage distribution network. 3. The leakage protector has the function of detecting and judging the leakage current, but does not have the function of cutting off and connecting the main circuit, which is different from the low-voltage circuit breaker.

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