1, household distribution box and peripheral equipment
Distribution box is a box with strong electricity used to branch and install air switch, distribution box is generally metal material, plastic or metal front panel, there is a small cover on the panel, that is, transparent, also opaque.
Distribution box specifications, according to which the branch and determined, small four, five road, more than a dozen road.
Before choosing the distribution box, first design the circuit shunt, and then according to the number of air open, and is single or double open, calculate the specifications of the distribution box generally accounted for the location of the distribution box set aside more rich, in order to facilitate the increase of the circuit in the future.
2. Circuit breaker
Circuit breaker, full name automatic air circuit breaker, also known as air switch, is a common low-voltage protection electrical appliances, can achieve short circuit, overload protection and other functions
Circuit breaker in the home power supply as the main power protection switch or branch line protection switch when the residential line or household appliances short circuit or overload, it can automatically trip, cut off the power supply, so as to effectively protect these equipment from damage or prevent the expansion of the accident.
Households generally use two-pole (i.e., 2P) circuit breakers for total power protection and single-pole (1P) for branch protection.
If the rated current of the circuit breaker is small, it is easy for the circuit breaker to trip frequently and cause unnecessary power failure. If the rated current of the circuit breaker is too large, it cannot achieve the expected protection effect. Therefore, it is very important to correctly choose the rated capacity current of the circuit breaker for home installation.
General minicircuit breaker specifications are classified by rated current 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, etc.
3, leakage protector
What kind of specifications of the distribution box and the total power that's ok but with the number of loop circuit, distribution box buy back then with air switch (open) and leakage protector (hereinafter referred to as leakage bartender) as to how much power can, need to look into the rated current of the door line, general bus and the value of socket, adding leakage on open (or take leakage protect open).
Leakage protector 30mA: Is the general current action of leakage protection switch, usually people get an electric shock, there is a perception and get rid of current means when people get an electric shock after the current value reaches a certain will feel numb, at this time of the human mind or consciousness, can control herself from electric shock when electric shock current again big to a certain value, people can't control myself out of an electric shock, already unconscious, The current value is 30mA, so the action current of the leakage protection switch is set to 30mA. The standard of the leakage switch is 30 ma, that is, if the leakage current is greater than 30 ma, the action trip.
Among them, the number of air opening and leakage protection, according to the loop to decide, in the purchase of distribution box, just know how many circuit distribution box.
But the circuit breaker has no obvious line break state or closed state indication function (that is, operation, operation personnel can see the working state), therefore, in front of the automatic circuit breaker (power supply side) should be added a set of knife switch this kind of knife switch is not used for breaking and closing line current, generally known as the isolation switch.
