GB 15579.3-2014Arc welding equipment -- Part 3: Arc striking and stabilizing devices (English PDF)

5.1 Test conditions

Shall comply with the provisions of 5.1 GB 15579.1-2013.

5.2 Measuring Instruments

Measuring instrument accuracy or precision requirements.

a) electrical measuring instruments. 0.5 (± 0.5% of full scale), insulation resistance and dielectric strength measurement exceptions for measuring insulation Precision resistance and dielectric strength of the instrument does not require, but shall be tested for accuracy problems;

b) temperature measurement devices. ± 2K;

c) high voltage probe. ± 5%.

Compliance 5.3 components GB 5.3 shall comply with the provisions of 15579.1-2013.

5.4 Type inspection

GB 5.4 shall comply with the provisions of 15579.1-2013. In addition, the following additional requirements.

The method of ignition and stable arc rated peak voltage of 11.1 shall be prescribed measurements, the test sequence for the type test project mechanical requirements in any convenient order tests before the project.

This section of the other types of inspection items can be performed in any convenient order.

5.5 Routine Tests

5.5.1 External and stable arc extinguishing device

Each external arc and stable arc installation should be in the following order by the following routine tests.

a) general visual inspection (see GB 15579.1-2013 3.7);

b) protection circuit continuity (see Chapter 10, and, where applicable, see GB 15579.1-2013 10.4.2);

c) Dielectric strength (see GB 15579.1-2013 6.1.5);

d) high voltage circuit test. according to manufacturer's instructions, in the high-pressure circuit operating voltage is applied to verify the integrity of the insulation;

NOTE. No-load voltage and reflux cable, either ground or isolation will affect the operating voltage.

e) general visual inspection (see GB 15579.1-2013 3.7).

5.5.2 Built-in arc and arc stabilizing means

For each built-in arc and arc stabilizing devices, welding power should be together in any convenient order the following routine tests.

a) high voltage circuit test. according to manufacturer's instructions, in the high voltage circuit operating voltage is applied to verify the integrity of the insulation.

NOTE. Connect load voltage and return cables, whether grounded or isolation, will affect the operating voltage.

6.1 Insulation

6.1.1 General

GB 6.1.1 shall comply with the provisions of 15579.1-2013.

6.1.2 CLEARANCE

Shall comply with the provisions of 15579.1-2013 GB 6.1.2 and adds the following requirements.

The minimum clearances high voltage devices should meet the requirements in Table 1.

Compliance check. visual inspection and measurement.

6.1.3 Creepage distance

Shall comply with the provisions of 15579.1-2013 GB 6.1.3 and adds the following requirements.

The minimum circuit stable arc and arc creepage distances shall comply with the provisions in Table 1.

Compliance check. visual inspection and measurement.

Table 1 arc and stable arc loop minimum electrical clearance and creepage distances

Rated peak voltage of a kV CLEARANCE b mm Creepage distance b mm 33 6.3 6 5.5 10 88 12.5

NOTE. These values are applied to the circuit is determined in accordance with 11.3.

a measure should be based on 11.1 Rated peak voltage.

b allows the use of interpolation.

6.1.4 Insulation resistance

GB 6.1.4 shall comply with the provisions of 15579.1-2013.

6.1.5 Dielectric strength

Isolated output circuit and coupling devices and stable arc ignition device (for example. a coupling transformer or a coupling capacitor) should be able to withstand higher loading Set at the rated maximum pulse frequency of 120% of rated voltage arc voltage peaks. Alternatively Test. available with the same peak amplitude, frequency 50Hz or 60Hz AC test voltage of approximately sine wave test, but only the coupling device.

Compliance checks. carried out by the following tests.

Coupling device stable arc voltage and arc used in the test shall be subjected to arc voltage or AC test voltage 60s.

Note 1. The interference suppression capacitors are not coupled device.

The test voltage shall be applied arc 60s in the output circuit, the voltage applied to the site of welding electrodes.

a) between the exposed conductive parts;

b) isolation between other circuits.

There should be no breakdown or flashover phenomenon. Not accompanied by any transient discharge voltage drop is negligible.

Note 2. The interference suppression capacitors shall be subjected to the test output circuit.

6.2 Normal use protection against electric shock (direct contact)

GB 6.2 shall comply with the provisions of 15579.1-2013.

Protection against electric shock (non-direct contact) 6.3 when the accident occurred shall comply with the provisions of 15579.1-2013 GB 6.3, and adds the following requirements.

According to the rated maximum input voltage, double insulation or reinforced insulation output circuit and the common power supply system electrical isolation. Figure A.1 it is an example of the coupled system and stable arc ignition device.

Compliance check. visual inspection.

11.1 Rated peak voltage

Rated peak arc voltage and arc stabilizing device shall not exceed the maximum value in Table 2 regulations.

Arc voltage and arc stability is obtained by subtracting GB 15579.1-2013 given in Table 13 no-load voltage value obtained (see Figure 1).

Table 2 Rated maximum peak voltage

Torch type rated peak voltage Hand torch 15kV Mechanical guide torch or a plasma torch 20kV

Figure 1 rated peak voltage

Compliance Check. high voltage probe and oscilloscope with sufficient bandwidth is measured.

Rated peak voltage and neither should a welding torch (gun) are connected by jumper, not 220pF capacitor is connected to the cable and the return will be measuring.

11.2 Pulse Current

11.2.1 the amount of charge in the half cycle of the pulse current (regardless polarity) should not exceed the maximum charge (see Figure 2).

--- For manual arc welding torch and arc stability means, 8µC; and

--- For mechanically stable arc and arc guide torch and plasma torch, 15µC.

a) AC pulse b) DC pulse Pulse current charge amount measurement Figure 2

Figure 3 arc voltage and arc stability

11.2.2 Danger of electric shock

According to the design and stable arc extinguishing device, the risk of electric shock caused by the pulse current will occur under the following circumstances.

--- The human body and the output of ignition and stable arc means of direct contact (11.2.3);

--- The human body and as part of an arc welding circuit series contacts (see 11.2.4).

Select the greatest amount of charge current pulse corresponding test.

11.2.3 Direct contact

Press the circuit shown in Figure 4, with a high voltage probe and oscilloscope with sufficient bandwidth is neither connected with the torch cable is not connected to the reflux Measure the voltage of the cases, for compliance checking.

Explanation.

1 --- welding or cutting power; 4 --- High Voltage Probes;

2 --- arc and arc stability means; 5 --- load as compact as possible;

3 --- oscilloscope;

a cable as short as possible.

Measuring line 4 direct contact Capacitance characteristic simulation torch has, the value of CT should be.

--- Reflux or connect torch cable length is 10m and below the arc and arc stability means, 220pF; or

--- Reflux or connect torch cable length exceeds 10m arc and stable arc means of, 1000pF.

To simulate the human body resistance, no sense of resistance RB should be.

--- For use in the risk of electric shock or arc is not the environment and stable arc with mechanical guide means torch, 1kohm; or

--- For use in greater danger of electric shock environment and stable arc extinguishing device, 500ohm.

Measured voltage divided by the resistance value RB to get a pulse current.

11.2.4 Contacts in series

Press the circuit shown in Figure 5, with a high voltage probe and oscilloscope with sufficient bandwidth is neither connected with the torch cable is not connected to the reflux Measure the voltage of the cases, for compliance checking.

The maximum distance between the arc gap (see FIG. 5) is adjusted to be able to discharge continuously.

Capacitance characteristic simulation torch has, the value of CT should be.

--- Reflux or connect torch cable length is 10m and below the arc and arc stability means, 220pF; or

--- Reflux for connecting the torch or arc and cable length exceeds 10m of Arc Stabilisation Unit, 1000pF.

To simulate the human body resistance, no sense of resistance RB should be.

--- For use in the risk of electric shock or arc is not the environment and stable arc with mechanical guide means torch, 1kohm; or

--- For use in greater danger of electric shock environment and stable arc extinguishing device, 500ohm.

Measured voltage divided by the resistance value RB to get a pulse current.

Explanation.

1 --- welding or cutting power; 4 --- High Voltage Probes;

2 --- arc and arc stability means; 5 --- load as compact as possible;

3 --- oscilloscope; 6 --- arc gap;

a cable as short as possible.

Measuring line 5 series contact

11.3 Average energy

The average energy of simulated human resistance, arc and arc stability means in the non-inductive resistor produced within the 1s period shall not exceed.

--- Arc and stable arc for manual welding torch device is connected, 4J; and

--- For arc and stable arc guide means connected mechanically torch and plasma torch, 20J.

Compliance check. the test according to the provisions of 11.2.

Arc and arc stability means the average energy of less than 4J can be considered to meet the energy limits apply to all parts of GB 15579.

Minus GB 15579.1-2013 Table 13 worth of no-load voltage to arc voltage and arc stability (see Figure 3).

11.4 Output capacitor discharge circuit

After the output and stable arc extinguishing device is cut off 1s, the output DC voltage should not exceed 113V.

Compliance Check. Press the circuit of Figure 6, with a high voltage probe and oscilloscope with sufficient bandwidth for voltage measurement.

Explanation.

1 --- welding or cutting power; 4 --- High Voltage Probes;

2 --- arc and arc stability means; 5 --- load as compact as possible;

3 --- oscilloscope;

a cable as short as possible.

Figure 6 capacitor discharge test line

Capacitance characteristic simulation torch has, the value of CT should be.

--- Reflux or connect torch cable length is 10m and below the arc and arc stability means, 220pF; or

--- Reflux for connecting the torch or arc and cable length exceeds 10m of Arc Stabilisation Unit, 1000pF.

17.1 Instructions

Shall comply with the provisions of GB 17.1 15579.1-2013 and increase the following requirements.

Manufacturers should be given in the specification.

--- Rated peak voltage;

--- Arc and arc stabilizing device is designed for manual welding torch or torch mechanical guide.

Since the pulse current will increase the risk of electric shock while using a torch or reflux cable has a longer cable (see Chapter 11), the manufacturer shall Specify the maximum cable length (m) and the torch type and gives the following warning.

Will increase the risk of electric shock length of the torch cable or reflux cable exceeds the maximum length of time specified by the manufacturer. Warning.

17.2 Logo

Shall comply with the provisions of 17.2 GB 15579.1-2013 (applies only to the external and stable arc extinguishing device).

Appendix A

(Informative)

Coupling system examples arc and arc stabilizing device

Explanation.

1 --- welding or cutting power; 5 --- voltage generator;

2 --- arc and arc stability means; 6 --- choke means;

3 --- output; 7 --- input coupling winding;

4 --- voltage source; 8 --- isolation diode.

Coupling system example of Figure A.1 and stable arc ignition device Appendix B (Informative) Plate example

a) Sign

1) Manufacturer 2) Model

3) sequence number 4) GB 15579.3

b) Output

5) UP = 8.5kV

6) X 6a) 35% 6b) 60% 6c) 100%

7) I2 7a) 300A 7b) 220A 7c) 180A

c) energy input

8) U1 = 220V 9) I1 = 0.5A

10) IP23 11)

Figure B.1 plate example external arc and arc stabilizing device