What are the models of 220V current circuit breaker switches
There are domestically produced Weikewei 22ov circuit breakers with good brand quality and reasonable price. The original number was DZ47LE, DZ47 was designed, LE is the electronic protector, C is the C-type action characteristic, and the number after C represents the rated current.
Circuit breaker leakage protector is two different products with different functions. Today, Weikewei Technology will popularize various common problems of circuit breakers for everyone, hoping to be helpful to you!
① Circuit breaker, also known as air switch, is an abbreviation for air switch with arc extinguishing device. It is a type of switch that can automatically protect low-voltage distribution electrical appliances. Its function is equivalent to a combination of electrical components such as knife switches, fuses, and thermal relays.
Mainly used for short circuit and overload protection, generally divided into 1p<; Only one live wire enters the neutral wire of the air switch on the common end; 1p plus n<; It means that both the live and neutral wires enter the circuit breaker, but the neutral wire is normally closed, regardless of whether it trips or not. Don't make any mistakes when wiring& gt; Or 2p<; When both the live wire and neutral wire enter the circuit breaker, they are both normally open and disconnected at the same time;. 3p or 4p, etc. Simply put, the working principle is that any electrical appliance will generate heat during operation, and the degree of heat generation is proportional to the power.
② Leakage protector, also known as residual current action protector, abbreviated as RCD, can be divided into the following three types:
The first RCD without overload or short circuit protection, with only leakage protection, is also known as a leakage switch.
The second RCD with overload protection, short circuit protection, and leakage protection is also known as a residual current circuit breaker.
The third RCD, also known as a leakage relay, does not have overload or short circuit protection functions, nor does it directly open or close circuits. It only has a leakage alarm function. It is generally used in important places without continuous power supply, and its principle is to use RCD zero sequence current transformers to detect and capture ground fault currents such as leakage and electric shock, and to make its release operate to cut off the power supply. According to its reaction time, it can be divided into high sensitivity, medium sensitivity, and low sensitivity. The working principle is i<; Live wire current>+i
What is the difference between a 6-position and a 2-position "1p+n" miniature circuit breaker?
The 1-bit "1p+n" miniature circuit breaker has a small volume and a breaking capacity of only 4.5ka, and cannot be equipped with accessories; The 2-position "1p+n" miniature circuit breaker has a large volume but a breaking capacity of 4.5ka, and can be equipped with various accessories.
What are the functions of leakage protection devices, leakage accessories, and other leakage products?
Used to protect against human electric shock and equipment insulation damage caused by electric shock.
8. How to use a leakage protector?
Used for leakage protection. After installing the wiring, press the leakage test button of the leakage protector to create a brief artificial leakage situation to test whether the leakage protector can operate. The test button should be tested once a month to verify the function of the leakage protector. In the event of ground leakage, the leakage protector automatically trips. Even if the handle is pushed again until the fault is cleared“
The position of 'on' also cannot reconnect the circuit (i.e. problem 4), avoiding human error in connecting the faulty circuit.
9. How to use leakage accessories/ b>?br>
Used in conjunction with miniature circuit breakers for overload, short circuit, and leakage protection. After installing the wiring, press the leakage test button of the leakage accessory to create a brief artificial leakage situation to test whether the leakage accessory can operate. The test button should be tested once a month to verify the functionality of the leakage accessories. When overloaded or short circuited, the handle of the miniature circuit breaker will move, but the handle of the leakage accessory will not move. When a leakage trigger occurs, both handles move. When resetting, the handle of the leakage accessory must be reset first. The cause of leakage has not been resolved
Except for before, the handle of the small circuit breaker and the handle of the leakage accessory cannot be reset.
What are the similarities and differences between leakage protectors and leakage accessories?
Both serve as leakage protection. But the leakage protector can be installed independently, and the leakage accessory must be used in conjunction with a small circuit breaker.
What are the similarities and differences between residual current circuit breakers, residual current protection devices, and residual current accessories?
A residual current circuit breaker integrates overload, short circuit, and leakage protection, which is equivalent to a residual current protector plus a miniature circuit breaker or a residual current accessory plus a miniature circuit breaker.