Why do you need a leakage circuit breaker for electric heating pipes?

Mainly in the electric heating tube leakage to protect the safety of people, although your heating tube is a triangle connection, in normal times its current vector sum is 0, when the leakage current reaches 30 mA when the leakage circuit breaker is disconnected, to protect the safety of people, the general leakage current reaches 50 mA before it is disconnected, for safety, the switch is designed to consider a factor (, so it is disconnected at 30 mA.

The electric heating tube is a tubular electric heating element, which is composed of metal tubes, spiral resistance wires and crystalline magnesium oxide powder. Electric heating tube products are generally made of high-quality imported stainless steel tubes, imported high-temperature magnesium oxide powder, high-quality heating wires and other materials to make heating elements, and stainless steel is made of other structural parts, which has excellent overall performance, as well as ultra-long life and easy maintenance.

When the electric heating tube is connected in a triangle, the leakage air opening is used for three-phase balance, not the general sense of leakage air opening, because it is three three-wire, not three-phase four-wire!

The heating wire used in the electric heating pipe is threaded, although the pipe wall has insulating powder as an insulator, once the heating wire is burned, the inertia rebound of the threaded wire will contact with the metal pipe to produce leakage, no matter what kind of connection application should be set up leakage switch for safety.

At high temperatures, there will be leakage current in the heating tube.

And the higher the temperature, the greater the leakage current.

1 heating tube may not feel too big.

However, if dozens of them are used, the superposition of leakage currents will cause great hidden dangers.

Therefore, large heaters generally need to add leakage protectors.

A few upstairs were too professional. Let me tell you a relatively easy truth:

No matter what electrical appliances are used, how the electrical appliances are connected, the leakage circuit breaker is to protect the safety of people, and the leakage circuit breaker is to ensure that the electrical shell is not electrified.

Cause. 1. The ground wire is not connected;

2. The insulation of the electric heating pipe is damaged (this may be the problem of insulating magnesium oxide powder, or the problem of the absolute liquid edge of the joint);

3. The electric heating tube is burned out and the cup body is short-circuited;

4. Improper cleaning, water touching the binding post of the stainless steel electric heating pipe;

5. The circuit wire falls off and collides with the cup; Imitation balance.

6. There is too much dirt in the electric socket or power plug;

7. The water quality is too poor, and the water pollution is serious;

Resolution. 1. Connect the ground wire as required and check whether it is correct;

2. If there is still such an event in the inspection and repair, it is recommended to replace it;

3. The electric heating pipe has been damaged and replaced with the electric heating pipe of the same specification;

4. Clean and dry the stainless steel heating pipe correctly;

5. Check the detached wire and re-weld it;

6. Clean and dry correctly;

Hello, we are using electric heating pipes, sometimes we will encounter leakage, electric heating pipe leakage is very dangerous, light damage to equipment and electrical appliances, serious can endanger people's life safety.

Therefore, we must pay attention to the safety of use when using.

The causes of electric heating pipe leakage, I mainly list six reasons. Take a look at the image below:

The insulation of the electric heating pipe is damaged.

The outer tube of the electric heating tube is damaged.

The wires that come out are broken.

Water comes into contact with the heating line binding posts.

Damaged electrical outlets or jacks.

The ground wire is not connected.

Then we can take corresponding measures for these problems that will occur.

The first to third problems mentioned above, the solution to directly replace the electric heating pipe water contact with the terminal post is to wrap the wiring with insulating tape, and if necessary, add the cover to connect the ground wire.

Replace power outlets and jacks.

After a long period of use, the internal insulation is aged and caused by water ingress.

If it is a water heater heating pipe.

If damaged, the shell will crack and leakage, and when the control circuit is wet with water, it will also cause the water heater to leak, so we can install a leakage protector on the power supply part. In order to prevent the water heater from leaking!

We can use a megohmmeter to detect if there is leakage, and if the leakage current is too small, sometimes the water heater will not trip.

When using the electric water heater, if you feel that there is leakage, you should stop using it quickly and find professional maintenance personnel to come to the door for maintenance in time! Troubleshooting! Before the maintenance personnel feel it, be sure to unplug the water heater to prevent danger!

If the electric heating pipe of the water heater is OK, it can definitely be replaced, depending on whether the inner tank of the water heater is assembled (that is, one party uses screws) or an integral type. It is easy to change and put together. The integral liner should be sawed open, and it will be welded after changing, which is generally difficult for us to do, and we need to find professional maintenance personnel to replace it!

Handling of electric heating tube leakage:

1. Connect the ground wire as required and check whether it is correct;

2. If there is still such an event in the inspection and repair, it is recommended to replace it;

3. The electric heating pipe has been damaged and replaced with the electric heating pipe of the same specification;

4. Clean and dry correctly;

5. Check the detached wire and re-weld it;

6. Clean and dry correctly;

What kind of machine? What is the insulation resistance? It should be related to assembly.

1. The ratio of power to length is unreasonable when the heating tube is designed, and the surface load of the heating tube is too high, resulting in the surface temperature of the heating tube being too high, which burns out the electric heating tube and bursts the pipe.

2. The material used in the production of heating pipes is seamed pipes, and they are not welded in place when welding. Therefore, after electrifying and heating the heating pipe, the weld is broken open due to thermal expansion and contraction, resulting in the phenomenon of pipe bursting.

3. The water quality in the boiler is too hard, so when the flange electric heating pipe is used, too much scale adheres to the surface of the heating pipe, and the heat dissipation of the pipe is slow.