There are four types of air switches: 1P, 2P, 3P, and 4P. Select the appropriate one according to the power supply method.
1P is the single line, in fact, it refers to single phase, can only protect one fire line, suitable for lighting or low power 220V appliances;
2P is used for the connection of a fire and a zero, generally using a 220V motor or the like;
3P is used for the wiring of three live wires, that is, the wiring of 380V, which is generally used for 380V electrical appliances;
4P is used for the connection of three fires and one zero, usually used for 380V electric appliances with neutral wire, of course, can also be used as the main switch;
As for the installation method, it is not necessary to use a regular distribution box. As long as the air switch can be fixed, the store that sells the air switch generally has a card slot for the fixed air switch, which can be purchased together. The easiest way is to fix the card slot on the wooden board or wall, and then install the air switch on the card slot. Every household needs an electrical appliance to ensure safety when it is used. That is the air switch. When the air switch is installed incorrectly, or the purchased air switch is not suitable for your home voltage, or if the line is connected incorrectly, it may cause a short circuit and cause a fire and other safety accidents. Therefore, knowing the working principle of the air switch, understanding how to install the air switch, and how to properly wire the air switch are very important for household electrical safety.
Air switch principle
When the line is generally overloaded, the overload current can not make the electromagnetic release action, but can cause the heat element to generate a certain amount of heat, causing the bimetal to be bent upwards by heating, pushing the lever to disengage the hook from the lock, and the main touch The head is broken and the power is turned off. When the line is short-circuited or severely overloaded, the short-circuit current exceeds the instantaneous trip setting current value, and the electromagnetic tripper generates a sufficient suction force to attract the armature to the impact lever, causing the hook to rotate upwardly around the rotating shaft seat and disengage the lock. The lock buckles the three main contacts under the action of the reaction force spring to cut off the power.
Air switch model
1. DZ5 series plastic shell air switch is suitable for AC 50HZ, 380V, rated current from 0.15A to 50A.
2, DZ10 series molded case air switch is suitable for AC 50HZ, 380V or DC 220V and below distribution lines, used to distribute electrical energy and protect the line, power supply equipment overload, under voltage and short circuit, and infrequent under normal work Break and connect to the line.
3, DZ12 series plastic shell air switch, small size, novel structure, excellent performance and reliability. Mainly installed in lighting distribution box, used for exchange of 50HZ single-phase 230V for hotels, apartments, high-rise buildings, squares, airports, railway stations and industrial and commercial enterprises.
4, DZ15 series plastic shell air switch, suitable for AC 50HZ, rated voltage 380V, rated current 63A in the circuit as an on-off operation.
5, DZ20 series plastic shell air switch is suitable for AC 50HZ, rated insulation voltage 660V, rated voltage 380V and below, its rated current to 1250A.
6, four-stage air switch is mainly used for AC 50HZ, rated voltage 400V and below, rated current 100 to 630A three-phase five-wire system, it can ensure that the user and power supply are completely disconnected, to ensure safety, and thus solve any other air The inevitable neutral pole current of the switch is not zero.
7, DZ47 series small air switch as long as it is suitable for AC 50HZ/60HZ, rated working voltage is 240V/415V and below, rated current to 60A circuit, the air switch is mainly used for overloading of electrical lines and equipment of modern buildings, Short circuit protection.
8, SCML series air switch is suitable for AC 50HZ, 60HZ, 500V and below in the circuit to do infrequently switch box motor infrequent start.
9, DW10 series universal air switch is suitable for AC 50HZ, rated voltage to 440V electrical circuit, do overload, short circuit, loss of voltage protection and infrequent conversion under normal conditions.
10, DW15 series universal air switch is suitable for AC 50HZ, rated voltage to 440V, rated working voltage to 1140V, 80V power distribution network, used to distribute power, power supply lines and power equipment overload, under voltage, short circuit protection use.
11, H series molded shell air switch is suitable for rated current 600A and below, AC 50HZ, rated working voltage 690V and below, DC 230V and below generally for electrophoresis, rated current 225A and below air switch, can be used as the line and not Frequent conversions and infrequent starting of the motor.
12, AC30 series modularized socket is the supporting electrical component of the modularized terminal combination electrical installation installed in the user. It can also be installed in other complete electrical boxes to plug in the electrical equipment.
Air switch installation
1. The main switch of the household distribution box can generally choose the bipolar 32-63A small air switch or disconnector;
2, the lighting circuit generally uses 10-16A small air switch;
3, the socket circuit generally chooses 16-20A air switch;
4, the air conditioning circuit generally chooses 16-25A air switch;
5. Use bipolar or 1P N (phase line neutral line) air switch. When there is a short circuit or leakage fault in the line, the phase and neutral lines of the power supply should be cut off immediately to ensure personal safety and safety of the electrical equipment.
The installation of the above air switch is for reference only. The actual electrical power of each household is not the same. The specific design is subject to the electrician's design.
Air switch correct wiring method
From the large electric meter to the home, there are 3 lines, red and blue, and the air switch with leakage protection can be used as the main control switch (A0). In addition, there are three ordinary air switches to control the lamp (A1), Air conditioner (A2), socket (A3).
From the front, there are 2 wiring posts above A0, an N symbol on the right, 2 wiring posts below, and an N symbol on the right; A1, A2, A3 are the same, there are respectively above and below A wiring post.
The three wires are distinguished: red hot wire (L), blue neutral wire (N), and flower wire are ground wire (E/PE/G/GND), and the ground wire is usually yellow-green. When installing the indoor circuit, the switch should be installed on the front side, the upper end is the incoming line, the lower end is the outgoing line, and the ground line is not in the switch.
First, connect the indoor line
1. The letter N is connected to the zero line (blue) below, and all the indoor zero lines are connected here.
2. Connect the ignition line (light) to the fire line below A1.
3. Connect the live line of the outlet line at A2 below.
4. Connect the fire line of the air conditioning line to the A3 below.
Second, access to the household line
1. Connect the zero line at the top N (blue)
2. Connect the fire line at the top L (red)
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