What is the protective role of 2P s empty opening and connecting a live wire and a neutral wire?

Overcurrent protection, with leakage monitoring components to protect you.

Short-circuit protection, tripping in case of short-circuit.

Overload protection, the number of currents is marked on the empty open, and it trips when the current is too large.

If it comes with a leakage module, it also protects against leakage, such as tripping if you are electrocuted.

It depends on what model your empty opening is.

Type C is for lighting, and is suitable for use in household appliances where the starting current is not large.

Type D is for power, and is suitable for use in places where the starting current of the power system is large.

Connect a live wire and a neutral wire, depending on your load situation, if the actual electrical current is very different from the empty one, only disconnect in the case of a short circuit in the circuit.

If the difference is not large, when the corresponding electrical current reaches the overload state for a certain period of time, it will be disconnected.

The choice of air opening should be determined by taking into account the load and the carrying current capacity of the front and rear wiring.

It is enough to connect the live wire, it is of little significance to connect the zero line, and when the switch is disconnected to check the grounding of the wire at home, it is also convenient to disconnect the live wire and the zero wire at the same time.

1.Short-circuit protection.

2. Overload protection.

Choosing a good amperage can play a role in overcurrent protection.

Neutral line and live line refer specifically to: the power supply line of civil electricity, and the AC power supply voltage of the mains is 220 volts (V). It consists of a neutral wire n and a live wire l, the neutral wire is grounded (the ground is zero), so it is called the neutral wire.

The ground wire, also known as the lightning cable, is a wire used to introduce electricity into the earth; When electrical equipment leaks or the voltage is too high, the current enters the ground through the ground wire.

The PE line is a protection zero line, it can not be connected to any electrical equipment, let alone switch appliances, there is a specification: (roughly) no switch shall be set on the protection zero line. Because PE is a metal shell connected to electrical equipment and electrical appliances, when they leakage, the PE wire will directly introduce the leakage current into the earth to ensure the safety of electrical equipment and personal safety.

Therefore, it must ensure that the conduction is good at all times, and the protection of the neutral line not only requires straight-through, but also does not allow series connection, let alone set a switch for it.

The 2P air open control socket can only be connected to the neutral line of the live wire.

If there is only one fire and one PE, the zero line will be led from the zero row of the distribution box. The live and neutral wires form the main power supply for the power supply. At the power supply end, the neutral line of the three-phase power supply (that is, the midpoint of the three-phase transformer) is grounded, that is, the neutral line is connected to the earth, so it is called the neutral line.

l connected to the live wire, n connected to the neutral wire. If it is not indicated, it is generally connected to the live wire on the left and zero wire on the right.

There are two wires in the lighting circuit, one is called the live wire (also known as the phase wire) and the other is called the neutral wire. The difference between the live wire and the neutral wire is that they have different voltages to the ground: the voltage of the live wire to the ground is 220 V (called the phase voltage), and the voltage of the neutral wire to the ground is equal to zero (which itself is connected to the earth).

Access line:1. Connect the zero line (blue) at the top n.

2. Connect the live wire (red) at the top L Note: The ground wire does not need to enter the switch.

3. Two-phase installation method:

Take out the neutral wire from the junction box and open the left terminal post, and then draw out the live wire from the junction box to open the right terminal post, and open the empty line to connect the socket according to the connection method of the left zero and right fire.

There is a protection function for any connection, left zero and right fire can be, left fire right zero can also be.

The correct connection method of the leakage circuit breaker DZ47LE series is the left fire and the right zero, and the live wire is through the leakage protection trip coil, if it is reversed, it can not play a safe protection role.

It is customary to fire left zero and right, but if you don't like it, it's okay the other way around, and it has no effect on leakage protection

N is connected to the zero line, L is connected to the live wire, and there is no identification to connect casually.

The N-line mark is the non-stop N-line type. This one of yours is a circuit breaker type, so you can pick it up casually.

The terminal has the sign of N, which is connected to the neutral line. In general, the left zero and the right fire.

This kind of switch with leakage protection function, n to the left, there is nothing why, because the structure determines its performance, because I have dismantled it,

The three-phase is open and can be connected to two phases.

The three-phase switch can be used for single-phase power supply, and one of the switches can be connected to the live wire, and any switch can be used.

The other two switches are empty, and the specific wiring is (if the No. 1 switch is used): connect the live wire in the power lead to the upper terminal of the No. 1 switch, and lead the live wire from the lower terminal of the No. 1 switch (red wire is recommended) to the socket. The air switch is installed in the positive direction of the above text, and it is easy to pull down by hand once the switch is to be disconnected;

The neutral line of the single-phase power supply is not connected to the switch, and continues to be connected to the socket from the neutral line of the power lead. Because the neutral line of the civil electricity system is grounded, in order to ensure that the electrical appliances can also be grounded when the switch is disconnected, the neutral line should not be disconnected. Of course, it would be safer if you could pull a separate ground wire.

To sum up, the three-phase air switch can be connected to a single-phase wire, and can be operated according to the above steps.

Three-phase air opening, when single-phase air opening is used, is possible, provided that the capacity of the circuit breaker must meet the requirements.

The three-phase empty opening can be connected to the two phases, the reason is the same, but there is one phase missing. It's more durable.

Three-phase empty open, can be connected to two-phase, live wire and neutral line.

Technically it's fine, but it's not cost-effective economically. Of course, what you already have on hand is another matter.

Three-phase air opening is a switch for three-phase power supply, in the case of emergency can be used to supply power to two-phase power supply, but the zero line and live wire must be connected separately, it is better to use two-phase power supply with two-phase air open.

Three-phase empty, can it be connected to two phases? Live and neutral.

It is possible to connect the live wire.

However, it is an unsafe practice to connect a switch on the neutral line, and it is forbidden to connect it.

Of course, it can be used as an ordinary single-phase switch, and you can connect those two terminals at will.

Three-phase empty open, can be connected to two phases, one fire and one zero.

Hope it helps.

Three-phase air opening can be used on single-phase (live and neutral).

Three-phase air opening can be connected to two phases, live wire and neutral line.

Yes, it should be connected to the terminal normally.

It can be connected to the live wire and the neutral wire.

OK.

One pole of the three-pole switch is connected to the live wire, one pole is connected to zero, and the other pole is empty. If any pole is overcurrent or short-circuited in the three-pole empty opening, the switch will trip protectively. Even if you only wire the three-pole switch in one pole, and the remaining two poles are empty, the protection function of the switch is also complete, and there will be no missing.

Absolutely fine, as long as the power supply voltage does not exceed the switching rated voltage; The load current does not exceed the rated current of the switch.

Three-phase four-wire leakage air opening, pay attention to the three-phase power supply, zero line need to access the switch.

When a three-phase load is fed, there is no problem with the three wires being wired from the switch.

When using a single-phase load, the neutral wire and live wire must be wired from the switch.

In short: without leakage. The sum of the currents of all the lines passing through the switch is equal to zero.

OK. The principle of three-phase no-switch is the same as that of ordinary switch.

In the 220V circuit, the leakage protector can be connected to the empty open neutral line of two P to share the leakage protector, because there is a common neutral line to lead out to the load, so the air switch is free to introduce the neutral line, and it is absolutely safe.

2P leakage circuit breaker is: two-pole two-wire leakage protector, a two-piece air switch plus a leakage module, when the leakage occurs, the leakage module drives the air switch to trip, and the live wire and neutral line are all disconnected from the external network power, so as to be safer.

In the 220V circuit, the leakage protector can be shared with the empty zero line of the two Ps.

In the 220V circuit, the leakage protector can be shared with the empty open zero line of two P, referred to as the leakage switch, also known as the leakage circuit breaker, which is mainly used to protect the equipment from electric shock when the leakage fault occurs and the person with a fatal danger, with overload and short circuit protection functions, which can be used to protect the overload and short circuit of the line or motor.

The leakage protector can be shared with the empty open zero line of 2p, because the zero line of the leakage protector circuit is still shared.

As long as it is not mixed with the neutral line of other circuits, the leakage protector will not trip.

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Hello and happy to answer for you, if you want to install a 2P air switch (also known as a 2P protector), it will usually have two wiring ports or blade connectors. One of the ports (or connectors) is marked on"l", which represents a live wire connected to a power source; The other port (or splice) is marked"n", indicating the neutral line connected to the power source. The specific steps are as follows:

1.First of all, make sure that the power supply is de-energized to prevent electric shock accidents during installation. 2.

Locate your power cord and disconnect it temporarily. 3.Insert the two live wires into each of the two ports of the air switch"l"Location.

Note: If your air switch is a blade connector, you need to open its wiring screw first, insert the live wire before tightening the wiring screw. 4.

Insert the neutral wire of the power supply into the port of the air switch"n"Location. It is also important to note that if your air switch is a blade joint, you will need to press the neutral wire against the copper sheet and then secure it with a wiring screw. 5.

Put away the cables and connectors, and press the test button of the air switch to make sure it is working properly. 6.Finally, the heavy cherry blossom cover is newly powered on and the electrical equipment is tested for normal operation.