GB 15579.4-2014Arc welding equipment -- Part 4: Periodic inspection and testing (English PDF)

4.2 Test conditions

Test ambient temperature of 10 °C ~ 40 °C, the subject of the welding power supply should be dry and clean.

4.3 Measuring Instruments

Precision measuring instruments should be at least 2.5, except when the insulation resistance measurement. For insulation resistance measurement accuracy of the instrument is no regulation Set, but shall be tested for accuracy problems.

4.4 Periodic inspection and testing

Requirements in accordance with Table 1 will be periodic inspections and tests.

7.1 shall be required to fill out inspection reports.

During the test, it should follow the manufacturer's supplement.

4.5 Maintenance

It shall be provided by the manufacturer maintenance schedule and instructions for maintenance.

7.1 shall be required to fill out inspection reports.

4.6 Maintenance

After the repair or replacement and repair welding or cutting functions related components, professionals should be specified in Table 1 to select the appropriate test project.

NOTE. If only simple repairs, such as replacing lamps, wheels or undercarriage, you do not have to Table 1 test.

7.1 shall be required to fill out inspection reports.

During the test, it should follow the manufacturer's supplement (such as functional test circuit diagrams, spare parts list, power and auxiliary devices, etc.).

4.7 Test procedure

The test sequence in Table 1.

Table 1 has been put into use in arc welding equipment test sequence

Periodic inspection and testing after repair

a) general visual inspection, see 5.1 a) general visual inspection, see 5.1

b) Electrical test.

--- Protective conductor resistance, see 5.2;

--- Insulation resistance a, see 5.3;

--- Load voltage, see 5.6

b) Electrical test.

--- Protective conductor resistance, see 5.2;

--- Insulation resistance a, see 5.3;

--- Load voltage, see 5.6

c) Functional Test.

---no request

c) Functional Test.

--- Function, see 6.1;

--- Supply circuit on/off means, see 6.2;

--- Voltage lowering means, see 6.3;

--- Solenoid valve, see 6.4;

--- Lights and control lights, see 6.5

d) inspection reports, see Chapter 7, d) inspection reports, see Chapter 7 If the removal of a test device of any one component (for example, suppressors, protective capacitor or surge protection devices), insulation resistance test can not be performed when the inspection, insulation resistance test 5.4 and 5.5 may be specified welding circuit leakage current and the leakage current primary test instead.

5.1 General visual inspection

General visual inspection should be under conditions of use welding equipment, according to the instructions provided by the manufacturer.

General visual inspection of the items in Appendix A.

5.2 Continuity of protective circuits

When the class I protected welding equipment including auxiliary equipment (such as cooling systems), the length of the cable connected to the supply does not exceed 5.0m, protection the resistance value of the conductor should not exceed 0.3ohm.

If the cable length exceeds 5.0m, then each exceeding 7.5m, to allow the resistance value of the protective conductor corresponding increase 0.1ohm. Protective guide the maximum permissible value resistor 1ohm.

Compliance check. according to the requirements of IEC 61557-4 measured between the exposed conductive parts to the protective conductor at the plug and test equipment the resistance.

The measurement process, the cable twist along the longitudinal direction of bending, especially at the cable enters the cabinet, in order to detect the protective conductor break Happening.

5.3 Insulation resistance

The insulation resistance should not be less than the value specified in Table 2.

Table 2 Insulation Resistance

A measuring insulation resistance Input circuit to welding circuit 5.0Mohm double or reinforced insulation Welding circuit protection circuits 2.5Mohm basic insulation Input circuit protection circuits 2.5Mohm basic insulation Input circuit II type of equipment on the contact surface b 5.0Mohm easily double or reinforced insulation and a control loop should have its circuit electrically connected together for testing.

B non-conductive surface is easy to measure the contact, the surface should be treated as metal foil wrapped.

Compliance check. at room temperature, applying 500V DC voltage measuring insulation resistance value stability.

When measuring, welding torch (gun) should be removed, a solid-state electronic components and protection devices may be short-circuited, the liquid cooling apparatus fails coolant.

5.4 Welding circuit leakage current

Leakage current welding output terminal and protective conductor terminals should not exceed 10mA rms ac.

Compliance check. the rated input voltage and load conditions with a measuring line in Figure 1 leakage current.

Total resistance measurement circuit is (1750 ± 250) ohm, and with a bypass capacitor that the time constant of the circuit is (225 ± 15) µs.

Measurement circuit when the total resistance 1750ohm, capacitance is 130nF.

Note. For II type of equipment, the use of power supply network systems PE terminals.

Figure 1 welding circuit leakage current is measured

5.5 Primary leakage current

Primary external protective conductor leakage current should.

a) less than or equal to the rated current of 32A plug-in connector device does not exceed 5mA;

b) For the rated current greater than 32A plug-in connector device not more than 10mA;

c) For no special protective conductors, permanently connected equipment does not exceed 10mA;

d) For a permanent connection, with equipment to strengthen the protective conductor, does not exceed 5% of the rated input current of each phase.

Compliance Check. In the following conditions, and conventional voltmeter with a measuring circuit shown in Figure 2.

a) welding power.

--- Ground isolation;

--- From the rated input voltage power supply;

--- Except through measurement assembly, otherwise it should not be connected with the protective ground.

b) is unloaded;

c) can not be removed interference suppression capacitors.

Note 1. The circuit shown in Figure 2 is used to obtain reproducible results.

Explanation.

A, B --- test terminals;

RS --- 1500ohm;

RB --- 500ohm;

CS --- 0.22µF;

U1 --- rated input voltage;

R1 --- 10000ohm;

U2 --- conventions load voltage;

C1 --- 0.022µF.

Leakage Current IPE = U2 RB

Figure 2 primary leakage current test network

Primary leakage current can be directly measured by differential measurement or current measurement method shown in Figure 3. Fig. 2 instead of the measuring circuit

Figure 3 meter. Tolerance measurement circuit component values should not exceed ± 5%.

For permanent connections with equipment to strengthen the protective conductor shall be the manufacturer's test.

Figure 3 Single-phase measurement principle primary device leakage current

Note 2. Warning this test should be professionals during the test the protective conductor in a failed state.

5.6 No-load voltage (U0)

Welding power at the rated input voltage and frequency, each retaining its no-load peak voltage shall not exceed the GB 15579.1-2013 Value specified in Table 13.

Before the test, if applicable, shall be specified test or the manufacturer's instructions for removing and stable arc extinguishing device, or to bypass.

Between the output of the welding power source load voltage measurement. If for security reasons or can not control other aspects of welding power output Measured between the end of the no-load voltage should be between terminal welding torch and welding cables measured no-load voltage reflux. Plasma cutting power is not this test is carried out.

If there is a marked decrease in the nameplate rated load voltage (Ur) or convert the rated load voltage (Us), then the measured (Ur) or (Us) Alternative (U0).

Compliance checks. carried out by the following measurement.

a) rms

With a True RMS meter shunt resistor 5kohm external welding circuit is measured.

b) Peak

In order to obtain reproducible measurements of peak, non-negligible risk of a pulse, and the use of the line shown in Figure 4.

Explanation.

(1) --- 1N4007 diode or similar device.

Peak measurements Figure 4 Voltmeter should indicate average range selection table should be as close to the actual value of the load voltage. Resistance voltmeter least 1Mohm.

Measurement parameters circuit element tolerance shall not exceed ± 5%. 0.2kohm resistor having at least 65W of power. Rheostat should can withstand the 0.6A current. Capacitor voltage rating as low as 200V.

6.1 Function

In order to ensure the normal operation, where the testing personnel involved in determining the safety of each function should be checked.

Compliance Check. Start welding power supply, check the operation status.

6.2 Input circuit on/off switch means

If the input circuit is equipped with an on/off switch means (such as switches, contactors or circuit breaker), then the on/off switch device should be able to.

a) off all non-grounded power cord;

b) clearly shows off the line.

Compliance check. visual inspection and measurement.

6.3 Voltage down means

If you install a voltage reduction device, this device should display properly.

Compliance Check. In the no-load and load conditions to observe the operation of the pointing device.

6.4 Solenoid valve

Should be checked each solenoid valve (eg TIG welding power source, MIG/MAG welding power source, plasma power) to confirm its normal operation.

Compliance check. the following operations carried out by visual inspection and test or specified by the manufacturer.

a) Function

Touch the torch switch, check airflow, confirm solenoid valve action;

b) leakage

Blocking the outlet, confirm no leakage (for example, no pressure drop).

NOTE. Flexible pipe and connecting means gas leak may occur.

6.5 and control lamp lights each signal should be checked or controlled lights, to ensure normal work.

Compliance check. visual inspection.

7.1 Inspection Report

Inspection report shall include.

a) the model being tested arc welding equipment;

b) date of inspection;

c) input voltage;

d) test results;

e) the signature testing organizations and testers;

f) test equipment used.

After the inspection report shall include equipment maintenance specified in Table 1 for all test items, otherwise, the response test items have not performed as described.

Test report format in Appendix B.

7.2 Logo

Qualified testing equipment should be labeled with identification.

Identification shall include the date of inspection or in accordance with local regulations recommended by the next inspection date.

Appendix A

(Informative)

Visual inspection of the project Visual inspection should include the following items.

a) torch/welding clamp, welding clamp

--- Missing or defective insulation

--- Connection defect

--- Switch defective or damaged

--- Other damage

b) Power supply

--- Defective or damaged cables

--- Plug deformed or damaged

--- Connector breakage or thermal damage

--- Cable fixing device failure

--- Cable and plug Not applicable

c) welding circuit

--- Defective or damaged cables

--- Coupler/socket deformation, damage or heat damage

--- Cable fixing device failure

--- Cables and couplers NA

d) housing

--- Parts are missing or damaged

--- Unauthorized modifications

--- Cooling air filter obstruction or missing

--- Overloading or improper use

--- Protective devices are missing or invalid, such as gas cylinder rack

--- Wheel, lifting devices, and support other missing or invalid

--- Wire fixed disk device failure

--- Inner cabinet placed a conductive object

e) control and indicator

--- Switches, gauges and lamp failure

--- Pressure regulator or flowmeter failure

--- Fuse selection error

f) the terms are usually

--- Too much dust or pollution

--- Improper cooling circuit or coolant leakage amounts

--- Trachea and joint failure

--- Identification is not clear

--- Other damage or improper use Appendix B (Informative)

Example equipment after maintenance inspection report Inspection Report Company Name. Address.

Equipment. Model. Serial Number/Code.

Manufacturer. Protection Level.

Testing equipment.

Vr.ms 220V supply voltage Test items. limit of measurement value General visual inspection OK Protective conductor resistance value RPE [ohm] <=0.3ohm 0.2 Insulation resistance Input circuit protection circuits.

(500V) RI-P [Mohm]

Welding circuit protection circuits.

(500V) RW-P [Mohm]

Input circuit to welding circuit.

(500V) RI-W [Mohm]

>=2.5Mohm

>=2.5Mohm

>=5Mohm

Primary leakage current Rated current is less than or equal to 32A plug Header connector device IPE [mA] Rated current greater than 32A Plug-even Access equipment IPE [mA] <=5mA <=10mA no special protective conductor, even permanent Connected device IPE [mA] with permanent connections to strengthen the protective guide Equipment IPE body [mA] <=10mA <=5% Welding circuit leakage current IPE [mA] <=10mA 0.568 no-load voltage with the mark U0 [VAC] U0 [VDC] with no sign U0 [VAC] U0 [VDC] <=68Vpeak <=113Vpeak <=113Vpeak <=113Vpeak N/A N/A N/A Functional Test OK Test passed - - - -Test the person's name Signature test personnel Date 05-10-09 Conclusion (general visual function test results or test results).

testing facility.

address.

Maintenance conditions.

N/A. Not applicable.

Appendix C

(Informative)

GB 15579.1 designed equipment fails Failure to GB 15579.1-2013 design of equipment (such as. prior to the first edition (1995) Publication date production equipment) may not fully comply in this case, people need to make the following assessment described in the test report.

--- Standard terms are not met;

--- Do not meet the new standard terms;

--- Not meet the requirements for risks arising from the assessment;

--- The necessary corrective measures.

Inspection reports shall be capable of directing the owner of the equipment under test to take corrective measures. If necessary, disable the device.

Appendix NA

(Informative)

Consistency in international relations in this part of the file specification and the references of documents GB/T 2900.73-2008 Electrotechnical terminology grounding and protection against electric shock (IEC 60050-195:1998, MOD) GB/T 2900.83-2008 Electrotechnical terminology of electrical and magnetic devices (IEC 60050-151:2001, IDT) GB 15579.6-2008 welding equipment - Part 6. Load limits for manual metal arc welding power sources (IEC 60974-6:2003, IDT) Test GB/T 18216.4-2012 AC 1000V and 1500V DC low voltage distribution systems Electrical Safety Measures Inspection, measuring or monitoring equipment - Part 4. equipotential grounding resistance and grounding resistors (IEC 61557-4:2007, IDT) twenty one