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GB 15578-2008Safety requirements for resistance welding machines (English PDF)

电阻焊机的安全要求

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Issued by

AQSIQ; SAC

Level / Type

National · Mandatory

Issue date

September 24, 2008

Implementation date

August 1, 2009

Scope

GB 15578-2008 is the English-translated version of 电阻焊机的安全要求.

GB 15578 sets the safety requirements for resistance welding machines and their controllers - the spot, seam, projection and butt welders whose electrodes close with enough force to crush a hand and which draw currents in the kilo-ampere range. It covers the mechanical hazards and their guarding, the two-hand and foot controls, the electrical safety of the primary and secondary circuits, the protection against the water and fume generated, the earthing, the marking and the instructions, together with the inspection rules and test methods. It is replaced by GB 15578-2026 from 1 February 2027. Issued on 24 September 2008, in force since 1 August 2009. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the edition it replaces are taken from there. The clause text, the tables and the numeric limits are not reproduced on this page - they are in the document itself, which is delivered in full in English translation.

Document preview — GB 15578-2008

National Standard of the People's Republic of China

ICS: 25.160.30
Classification: J 64
Replacing: GB 15578-1995

Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Terms and Definitions
4 Conditions of Use
5 Test conditions
6 Electrical Safety
6.1 Insulation

Foreword

The standard Chapter 3 "Terms and definitions" are recommended, the rest are mandatory. This standard replaces GB 15578-1995. The main changes compared to the Standard and GB 15578-1995 are as follows:

--- Expanding the scope of the standard. Original standard applies only to single-phase frequency AC resistance welding machine.

--- Dielectric strength test voltage and temperature limits have been modified.

--- Increasing the terms and definitions.

--- Increased clearances and creepage distances.

--- Adds to the protective conductor connection requirements.

--- Increasing the power on/off switching device and leakage protection requirements.

--- Increased component compliance requirements.

--- Increased the use of the specification and requirements of the nameplate.

--- Added Appendix A and Appendix B content. The Standard Appendix A and Appendix B are informative. The standard proposed by China Electrical Equipment Industrial Association. This standard by the National Standardization Technical Committee Welder (SAC/TC70) centralized. This standard drafting units. seven high-tech Co., Ltd., Tianjin, Guangzhou Hing Electric Co., Ltd., Shanghai Dongsheng Welding Group Co. The company, Chengdu Institute of electric welding machine, Chengdu tripartite Electric Co. Drafters of this standard. What, Liu Guoying, Hucheng Ping, Yinxian Hua NATIONAL NATURAL. This standard was first released in 1995, this is the 1st Amendment. Safety requirements for resistance welding machine

1 Scope

This standard specifies the general safety requirements, inspection rules and test methods for resistance welding machine. This standard applies to not more than GB/T 156 standard supply voltage specified in Table 1 or by a mechanical device driven resistance welding machines and the like Technology used in welding and resistance welding machine controller (hereinafter referred to as controller), including single and multi-station use welder. Resistance welding machine controller and can be composed as a whole, can also be separated into single devices, but no matter what form the structure taken are applicable to This standard. NOTE. This standard does not include electromagnetic compatibility (EMC) requirements.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 156-2007 standard voltage ( IEC 60038.2002, MOD)

GB/T 2900.22-2005 Electrotechnical terminology Welder

GB/T 3805-1993 extra low voltage (ELV) limits (eqv IEC 61201)

GB/T 4207-2003 Fixed insulating materials under moist conditions index tracking of the measuring method and the proof tracking index compared ( IEC 60112. 1979, IDT)

GB 4208-2008 housing protection (IP Code) ( IEC 60529.2001, IDT)

GB 5226.1-2002 Safety of machinery electrical equipment Part 1. General requirements ( IEC 60204-1.2000, IDT)

GB/T 5465.2 Graphical symbols for electrical equipment ( GB/T 5465.2-2008, IEC 60417DB.2007, IDT)

GB/T 8366-2004 solder resistance welding machine for mechanical and electrical requirements ( ISO 669.2000, MOD)

GB 14050-1993 system grounding types and safety technical requirements

GB/T 15543-1995 power quality three-phase voltage unbalance factor Insulation coordination within the

GB/T 16935.1-1997 low pressure system equipment - Part 1. Principles, requirements and tests (idt IEC 60664- 1.1992)

GB/T 16935.3-2005 within low-voltage systems Insulation coordination for equipment - Part 3. Using the coating, potting or molding for antifouling Protection ( IEC 60664-3.2003, IDT)

GB/T 17045-2006 General Protection against electric shock devices and equipment ( IEC 61140.2001, IDT)

3 Terms and Definitions

This standard uses the following terms and definitions of IEC 60050 (151), IEC 60050 (851), GB/T 2900.22, GB 5226.1 And GB/T 16935.1 of the definition.

3.1 From the power source, the electrodes, the body and the control devices and other components, to complete the process of resistance welding equipment or the like the process.

Note 1. You can be a separate device, it can be part of an integrated machinery and equipment.

Note 2. The use of the word "resistance welding machine" hereinafter.

3.2 Similar to the resistance welding process on a mechanical device similar to resistance welding machine carried out, for example, resistance brazing, resistance brazing or resistive Fever.

3.3 Handheld, built-in transformers for resistance welding machines.

3.4 Work fixing, welding solder position by resistance welding machine.

3.5 Movement of the workpiece, mounted in a fixed position using a resistance welding machine.

3.6 Means for controlling the working process of resistance welding machine and welding parameters.

3.7 Test in accordance with a design scheme of the manufacturing one or more products is carried out to verify their compliance with the relevant standards. (IEV851-02-09)

3.8 After the production process or product made for each product test conducted to verify their compliance with relevant standards or code requirements. (IEV851-02-10)

3.9 Was visually observed to confirm the presence of the product does not comply with the relevant standards is obviously not a defect.

3.10 All conductive parts of the circuit by the welding current.

3.11 Resistance welding machine for welding operation and control for the power supply circuit protection circuits.

4 Conditions of Use

4.1 Environmental conditions Comply with the requirements of the standard resistance welding machines should be able to work under the following conditions.

a) ambient air temperature range. 5 °C ~ 40 °C Relative humidity. 40 °C does not exceed 50% 20 °C not more than 90% Dust in the ambient air, acid, corrosive gases or substances, which are not more than the normal content of these substances due to the welding process generated except.

b) the temperature of the cooling medium should not exceed. 1) cooling liquid inlet 30 °C NOTE. If you add antifreeze, the minimum ambient temperature can be reduced accordingly, so as not to solidification condition. 2) air-cooled 40 °C

c) a liquid coolant inlet pressure range. 0.15MPa ~ 0.3MPa.

d) a liquid coolant should conform to appropriate standards, the use of cooling water quality should be consistent with industrial water quality standard.

e) Altitude should not exceed 1000m.

Note. You can agree between manufacturers and users in different environmental conditions, resistance welding confidential agreed after tagging.

4.2 Power supply Power supply shall comply with the provisions of GB/T 156-2007 in. The quality of the power supply network should meet the following requirements.

a) should be an actual voltage waveform of a sine wave;

b) fluctuations in grid voltage does not exceed the rating of ± 10%;

c) voltage fluctuations in the grid frequency does not exceed the rating of ± 1%;

d) three-phase voltage unbalance factor <= ± 4%.

5 Test conditions

5.1 Test conditions It should be at ambient temperature 10 °C ~ 40 °C, and the new, dry, install the full resistance welding machine for testing. Using liquid cooling Resistance welding machine shall be tested under the conditions specified by the manufacturer of the cooling liquid.

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 resistance and dielectric strength of the accuracy of the instrument is not specified, but the measurement time You should consider the accuracy problems.

b) welding current measuring instrument. 5

c) measuring of temperature. ± 2K

d) pressure measuring instruments. Level 1

5.3 Type inspection Unless otherwise specified, test items required by this standard are type inspection items. Resistance welding machine should work with its matching, may affect the test results together with auxiliary equipment tested. Unless otherwise stated otherwise, all type of inspection should be carried out on the same resistance welding machine.

5.4 Routine Tests Each resistance welding machine should be made through all the routine tests. Test items are as follows:

a) general visual inspection (see 3.9);

b) is connected to the protective conductor (see 6.4);

c) Insulation resistance (see 6.1.4);

d) dielectric strength (see 6.1.5);

e) rated load voltage (see 6.2.1);

f) liquid cooling system (see 9);

6.1 Insulation

6.1.1 General According to GB/T 16935.1-1997 provisions, the vast majority of resistance welding machines belong III class over-voltage equipment, so should be used for at least

3 Environmental pollution in the design stage. Liquid cooling equipment should be considered liquid condensation problems. The component or components according to GB/T 16935.3-2005 require the use of coating, potting or molding for protection against pollution, permits the use of grade

2 Clearances and creepage distances of environmental pollution. If the resistance welding machine is designed, the warning should be based on this kind of resistance welding machine line to neutral voltage, to inform the resistance welding Phase four-wire machine only for neutral grounding system of the power supply system or the neutral point earthed single-phase three-wire power supply system. In addition to resistance welding machine welding circuit, the other part should meet GB/T 17045-2006 prescribed class I or II class protection.

6.1.2 CLEARANCE According to GB/T 16935.1-1997 provisions, using the basic insulation, additional insulation and reinforced insulation class III overvoltage minimum electrical equipment Table 1 gap. Table 1 III overvoltage class equipment minimum electrical clearance A voltage RMS / Basic or supplementary insulation reinforced insulation Rated impulse Test voltage Peak/V AC test Effective voltage Value/V Pollution Level Clearance/mm Rated impulse Test voltage Peak/V AC test Effective voltage Value/V Pollution Level Clearance/mm 50,800,566 0.2 10,015,001,061 0.5 0.8 15,025,001,768 1.5 1.6 0.5 0.8 1.5

1.6 Table 1 (continued) A voltage RMS / Basic or supplementary insulation reinforced insulation Rated impulse Test voltage Peak/V AC test Effective voltage Value/V Pollution Level Clearance/mm Rated impulse Test voltage Peak/V AC test Effective voltage Value/V Pollution Level Clearance/mm 3,004,000,282,836,000 4243 5.5 5.5 60,060,004,243 800,056,578 1000 8000 5,657,812,000,848,514

Note 1. This table is taken from the value of GB/T 16935.1-1997 in Tables 1 and 2.

Note 2. For other pollution degree and overvoltage category can be found in GB/T 16935.1-1997. a See Appendix A. In determining the clearances non-conductive surfaces accessible, no matter GB 4208 publication prescribed test finger may touch to these tables Which parts of the face, these surfaces should be regarded as coated with a metal foil. Clearances can not be inserted into the law. Used voltage limiting device (such as a metal oxide varistor) resistance welding machine parts protection (such as an electronic circuit or component) between Clearances may be Class I Overvoltage determined (see GB/T 16935.1-1997). Values in Table 1 are also applicable to the input loop isolation (such as transformers) control loop. If the control circuit is connected directly to the input circuit, the input voltage should be used. According to GB/T 16935.1-1997

4.2 requires measuring clearances is checked or not. In the case can not be measured, can Table 1 given voltage resistance welding machine for impulse voltage test. When do impulse voltage test, each polarity is applied to at least three pulses per time interval between two pulses of at least 1s, according to the voltage value Specified in Table 1. Impulse voltage generator used should have a pulse width of the output waveform 1.2/50µs, and the output impedance of less than 500Omega. Table 1 can also be used in a given AC test voltage test, test duration of 3 cycles; can also be a value equal to the pulse Ripple free dc test voltage value, the polarity of each test three times per 10ms. Equipment shall withstand the test voltage without breakdown or flashover phenomenon.

6.1.3 creepage distance According to GB/T 16935.1-1997 provisions of the basic insulation, additional insulation and reinforced insulation minimum creepage distances are shown in Table 2. Table

2 Minimum creepage distance A voltage RMS / Basic or supplementary insulation reinforced insulation Pollution Degree Pollution Degree Material Category Material Category Material Category Material Category Material Category Material Category I II III I II III I II III I II III I II III I II III Creepage distance/mm creepage distance/mm creepage distance/mm creepage distance/mm creepage distance/mm creepage distance/mm 1 10 0.40 0.48 1.6 1.2 1.6 12.5 0.42 1.05 1.25 1.7 1.6 0.5 16 0.45 0.53 1.1 1.6 1.3 1.8 20 0.48 0.56 1.2 1.6 0.8 1.1 1.4 1.6 1.8 1.9 2.4 3 25 0.50 1.25 1.7 0.6 0.85 1.2 1.5 1.7 1.9 2 2.5

3.2 TABLE 2 (cont.) A voltage RMS / Basic or supplementary insulation reinforced insulation Pollution Degree Pollution Degree Material Category Material Category Material Category Material Category Material Category Material Category I II III I II III I II III I II III I II III I II III Creepage distance/mm creepage distance/mm creepage distance/mm creepage distance/mm creepage distance/mm creepage distance/mm 32 0.53 1.30 1.8 0.63 0.9 1.25 1.6 1.8 2 2.1 2.6 3.4 40 0.56 0.8 1.1 1.4 1.6 1.8 1.9 2.4 1.3 1.7 1.9 2.1 3 0.670.95 2.2 2.8 3 .6 50 0.6 1.2 1.5 0.85 2.5 3.2 0.71 1.7 1.9 2 1.4 1 1.8 2 2.2 2.4 3 3.8 63 0.63 1.25 0.9 1.6 1.8 2 2.1 2.6 3.4 1.5 1.9 2.1 2.4 2.5 0.751.05 3.2 4 80 0.670.95 1.3 1.7 1.9 2.1 2.2 2.8 3.6 0.8 1.1 1.6 2.2 2.5 3.2 45 100 0.71 1 1.4 1.8 2 2.2 2.4 3 3.8 1 1.4 2 2.5 2.8 3.2 45 6.3 125 0.751.05 1.5 1.9 2.1 2.4 2.5 3.2 1.25 1.8 2.5 3.2 4 3.6 45 6.3 8 160 0.8 1.1 1.6 2.2 2.5 3.2 45 1.6 2.2 3.2 4 4.5 5 6.3 8 10 200 1 1.4 2 2.5 2 2.8 3.2 45 6.3 2.8 45 5.6 6.3 810 12.5 250 1.8 2.5 1.25 3.2 3.6 45 6.3 2.5 3.6 5 6.3 7.1 8 8 10 12.5 16 320 1.6 2.2 3.2 4 4.5 5 3.2 4.5 6.3 810 6.3 8910 12.5 1620 4002 5.6 6.3 2.8 45 5.6 4 810 12.5 81 011 12.5 162 025 500 2.5 3.6 5 6.3 7.1 7.1 810 12.5 165 12.5 10 1416202532 630 3.2 6.3 8910 12.5 4.5 1620 12.5 6.3 9 161820253240 8004 12.5 16 5.6 81 011 20 2,581,116,202,225,324,055 10 005 7.1 12.5 10 14 16 20 25 32 10 1,420,252,832,405,063

Note. The table values adopted GB/T 16935.1-1997 in Table 4. a See Appendix A. When creepage distance measuring accessible insulating surfaces, whether prescribed by GB 4208 test finger may touch these surfaces Which part, these surfaces should be considered covered by a layer of metal foil. Table 2 lists the rows maximum rated voltage creepage distance, at a lower rated voltage, can be inserted into the law. Table 2 also applies to the value of the input circuit is isolated (such as transformers) control loop. Creepage distance can not be lower than the corresponding clearances, creepage distances should be equal to the minimum clearances they require. If the control circuit and the input circuit is directly connected to the input voltage value should be used. Qualified or not measured by the length measuring instrument according to GB/T 16935.1-1997

4.2 requirements.

6.1.4 Insulation resistance Insulation resistance shall be not less than the values given in Table 3. Table

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 156-2007 · IEC 60038.2002 · IEC 61201 · GB/T 4207-2003 · IEC 60112 · GB 4208-2008 · IEC 60529.2001 · GB 5226.1-2002 · IEC 60204 · IEC 60417 · GB/T 8366-2004 · ISO 669.2000 · GB/T 16935.1-1997 · IEC 60664 · GB/T 16935.3-2005 · GB/T 17045-2006 · IEC 61140.2001 · GB/T 17211-1998 · IEC 60905 · GB/T 20113-2006 · IEC 62114.2001 · IEC 60050

Cited by

GB 28736-2019Minimum allowable values of energy efficiency and energy efficiency grades for welding machines

Editions of GB 15578

Edition	Title	Revision	Status
GB 15578-2026	Safety requirements for resistance welding machines	next edition	Replaces this edition
GB 15578-2008	Safety requirements for resistance welding machines	current edition	Current
GB 15578-1995	Safety requirements for resistance welding machines	previous edition	Superseded

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