What kind of wire is used for the power cord of the small household welding machine, and what kind o

There is no specific requirement for any line, that is, the cross-sectional area of the line is required, which is generally not less than square millimeters.

If the wire is very long, for example, more than 50 meters, it is necessary to choose a thicker wire, otherwise the voltage drop of the line is too large, and the performance of the welder will be reduced.

Household small electric welding machine generally refers to a transformer or inverter welding machine with an output current of no more than 250A, so the power line of the welding machine generally uses 2*4 square + square cables, that is, 2 4 square power cords + a square grounding wire, in order to ensure safety, the grounding wire is necessary. As for the socket part, it is decided according to the distance and the size of the welding current, and generally should not be lower than the power cord of the welding machine.

Professional sales and maintenance of welding machines, 10 years of experience. Communication.

Welding machine operating procedures.

1. The use of electric welding machine shall be in accordance with the provisions of Section and Section of JGJ 33-2001.

2 The butt welding machine should be placed indoors and should have a reliable grounding or zero connection. When multiple butt welding machines are installed in parallel, the distance between them shall not be less than 3m, and they should be connected to the power grid of different phases, and they should have their own knife switches. The cross-section of the conductor should not be less than that specified in Table 1.

Table 1 Wire cross-section.

Butt welding machine rated power (kva) 25 50 75 100 150 200 500

When the primary voltage is 220V, the wire cross-section (mm2) is 10 25 35 45 —

When the primary voltage is 380V, the cross-section of the wire (mm2) 6 16 25 35 50 70 150

3. Before welding, check and confirm that the pressure mechanism of the butt welding machine is flexible, the clamp is firm, the air pressure and hydraulic system are not leaking, and everything is normal before welding.

4. Before welding, the secondary voltage should be adjusted according to the cross-section of the welded steel bar, and the steel bar exceeding the specified diameter of the butt welding machine should not be welded.

5. The contact points and electrodes of the circuit breaker should be polished regularly, and all the connecting bolts of the secondary circuit should be tightened regularly. The temperature of the cooling water shall not exceed 40; The amount of displacement should be adjusted according to the temperature.

6. When welding long steel bars, brackets should be set up to cooperate with the operators who handle steel bars, and sparks should be prevented from scalding during welding.

7. A baffle should be set up in the flash area, and personnel unrelated to welding are not allowed to enter.

8 When welding in winter, the indoor temperature should not be lower than 8. After operation, the cooling water in the machine should be drained.

1. The three red wires in the welding machine diagram are connected to the empty space, which is the input line of 380V.

2. The three sets of yellow wires are the wiring of the alternating current to the rectifier bridge, which is connected to the rectifier bridge.

3. The four red and black wires are rectified DC current for charging the capacitor, which is connected to the power board below.

4. The two wires in the figure are connected to the relay and are used to control the relay.

5. The wire covered by the black hose in the picture is used to supply power to the 220V transformer and is connected to the transformer.

1. The three red lines in the welding machine diagram are the input lines of 380V.

2. The three sets of yellow wires are the wiring from the alternating current to the whole compass bridge.

3. The four red and black wires are to charge the rectified DC current into Shanna Chaxing and connect it to the power board below.

4. Connect the two wires in the figure to the relay, which can be used to control the relay.

5. The wire wrapped by the black hose in the picture is used to supply power to the 220V transformer slowly, and the transformer is also connected.

Summary. If it is 380V, it will be directly connected to any two live wires. 220V is one fire and one zero. The grounding wire has a special grounding terminal in the distribution box.

How to connect the power cord of the welding machine.

If it is 380V, it will be directly connected to any two live wires. 220V is one fire and one zero. The grounding wire has a special grounding terminal in the distribution box.

Please show it with a picture.

Please show it in the electrical box.

I don't have a distribution box here.

Please use the electric box to display.

Is there a sign in your ** symbol electrical box?

I'll go out and take one for you in a minute.

Okay, sorry for the trouble, thank you!

The general connection method of the welding machine is as follows:

Tools: circuit breaker, welder sail, cable.

1. Connect the circuit breaker to the power supply first, according to the power supply used by the welding machine.

2. There are 3 binding posts next to the welding machine, black is the common wire, and the red is marked with 220 volts and 380 volts.

3. When using 220V, connect one of the 6 square cables to the binding post marked 220V, one to the black common wire, and the other end to the 220V power supply.

4. When using Hongchen 380V, connect one of the 6 square cables to the binding post marked with 380 volts, one to the black common wire, and the other end to the 380 volt power supply.

5. The ground wire is connected to 0 in the Xiaochan line column, and the welding wire is usually connected to the middle or strong gear, and the power supply can be welded.

Introduction to electric welding machines

Refers to the electrical appliances that provide certain characteristics for welding, welding is widely used in various industrial fields due to the advantages of flexibility, simplicity, convenience, firmness and reliability, welding and even the same strength as the base metal, such as aerospace, ships, automobiles, containers, etc.

Electric welding machine (electric welding machine) is actually a transformer with descending external characteristics, the 220V and 380V alternating current into low-voltage direct current, the welding machine can generally be divided into two types according to the output power supply type, one is AC power supply; One is direct current.

1. Look at the label

The inner silver index of the wire certificate produced by the regular manufacturer should include: 3C certification mark, certification number, model specification, implementation standard, rated voltage, wire length, production date, producer, inspector, factory name, factory address, fixed **, anti-counterfeiting mark, etc. The labels of counterfeit products are often unclear or incomplete.

2. Look at the surface

The plastic skin of the national standard wire is soft and smooth, and the color is uniform. On its surface, it should also be printed with several contents on the product certificate, such as: 3C certification mark, certification number, model, rated voltage, implementation standard, factory name, etc.

At the same time, the handwriting must be clear and not easily erased.

3. Test bending

You can take a wire head and bend it repeatedly by hand, where it feels soft, has good fatigue strength, plastic or rubber feels elastic and there is no crack on the wire insulator is the best product. The insulation layer of the fake and shoddy wire looks like Naxin is very thick, but in fact most of them are made of recycled plastic, as long as you squeeze it a little harder, the extrusion will be white, and the wire will be broken if you bend it 4 or 6 times.

4. Tear the insulation

High-quality insulating materials have a certain mechanical strength and flexibility, and can not be easily torn. The inferior wire can be torn off or pinched off by hand;

5. Look at combustion

According to the regulations, the insulation layer of the wire has a certain flame retardancy. Peel off a section of insulation, ignite it with a lighter, and continue to spontaneously ignite after leaving the open flame is an inferior wire.

6. Check the thickness

Intercept a section of the insulation layer to see whether there are visible pores on the section of the insulation layer, and whether its core is located in the middle of the insulation layer. The non-centering is the off-core phenomenon caused by the low process, and the pores indicate that the insulating material used is unqualified. Severe eccentricity is most likely to leak electricity on the thinner side, and the presence of pores also affects the compressive strength.

1. It depends. The household welding machine is generally full power of about 5kw, if it is only spot welding, the ordinary plug-in board can also be topped, if the long-term full welding continuous welding is not good, to the straight cong answer balance air under the fire pull wire.

2. The plug of the household electric welding machine should be a three-hole plug (with a grounding wire), and when connecting to the household electroosmosis, pay attention to check whether the grounding wire end of the three-hole plug is reliably connected, and then directly insert it for use after confirmation.

3. If the plug of the household welding machine is not a three-hole plug (neither with a grounding wire), but a two-eye plug or only two wires, you must find the grounding wire or grounding terminal of the welding machine with your hand, first draw out the grounding wire and connect it reliably (you can insert a steel brazing connection on the wet ground or connect it to the wetter metal), and then plug in the power supply and start using it. It is also necessary to pay attention to the matching of the nominal current value of the welding machine with the nominal current value of the household electrical plug, so as to ensure the safety of use.