GB 28736-2019 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 28736-2019 | English | 130 |
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Minimum allowable values of energy efficiency and energy efficiency grades for welding machine
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| GB 28736-2012 | English | 90 |
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Minimum allowable values of energy efficiency and energy efficiency grades for arc welding machines
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GB 28736-2019: Minimum allowable values of energy efficiency and energy efficiency grades for welding machine
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB28736-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.010
F 01
Replacing GB 28736-2012
Minimum allowable values of energy efficiency and
energy efficiency grades for welding machine
Issued on. DECEMBER 31, 2019
Implemented on. JULY 01, 2020
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 5
4 Energy efficiency grades of welding machine... 5
5 Technical requirements... 6
6 Test methods... 9
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB 28736-2012 “Minimum allowable values of energy
efficiency and energy efficiency grades for arc welding machines”. Compared
with GB 28736-2012, in addition to editorial modifications, the main technical
changes are as follows.
-- added the term and definition of minimum allowable values of energy
efficiency for welding machines (see 3.1);
-- added the energy efficiency grades of resistance welding machine (see
Table 7 ~ Table 10 of Clause 5);
-- added the test methods (see Clause 6).
This Standard was proposed by and shall be under the jurisdiction of
Standardization Administration of the People's Republic of China.
The drafting organizations of this Standard. China National Institute of
Standardization, Chengdu Sanfang Electric Co., Ltd., Tangshan Kaiyuan
Electric Group Co., Ltd., Shenzhen Jiashi Technology Co., Ltd., Shanghai
Hugong Welding Group Co., Ltd., Shenzhen Ruiling Industrial Co., Ltd.,
Hangzhou Kaierda Welding Machine Co., Ltd., Shenzhen Hongbai Technology
Industrial Co., Ltd., Shanghai General Electric Welding Machine Co., Ltd.,
Tianjin Seven Institute of Technology, Shenzhen Megmit Electric Co., Ltd.,
Zhejiang Kende Mechanical & Electrical Co., Ltd., Ohara (Nanjing)
Electromechanical Co., Ltd., Shanghai Weiteli Welding Equipment
Manufacturing Co., Ltd., Chengdu Welding Technology Co., Ltd., Dongguan
Pengyu Weigao Intelligent Technology Co., Ltd., Ningxia Wuzhong Haoyun
Electric Welder Co., Ltd., Jiangsu Zhenan Equipment Technology Co., Ltd.,
Yongkang Jiaxiao Welding Automation Equipment Co., Ltd., Jinzhou Shenghe
Technology Electronics Co., Ltd., Hunan Chuen Information Technology Co.,
Ltd.
Main drafters of this Standard. Liu Ren, Yang Qingxun, Su Dong, Chen Jie, Luo
Weihong, Shu Zhenyu, Wang Wei, Hou Runshi, Han Peiwen, Wang Jincheng,
Zhu Xuanhui, Zhao Zhongqiu, He Zhijun, Zhang Zuwang, Liu Qun, Yang Guang,
Liu Xingwei, Zhou Yin, Li Feng, Cheng Haojian, Xia Jifu, Chen Jia.
Version of standard substituted by this Standard is.
- GB 28736-2012.
Minimum allowable values of energy efficiency and
energy efficiency grades for welding machine
1 Scope
This Standard specifies the energy efficiency grades, minimum allowable
values of energy efficiency and test methods for arc welding machine and
resistance welding machine.
This Standard is applicable to the arc welding machine and resistance welding
machine that are designed for industrial and professional use, not exceeding
the voltage specified in GB/T 156.
The resistance welding machine to which this Standard applies specifically
refers to the resistance welding transformer which is finally installed with the
frame, the input circuit and the secondary circuit.
This Standard is not applicable to AC TIG arc welding machine, AC and DC TIG
arc welding machine, power frequency secondary rectification resistance
welding machine, seam welding machine, resistance butt welding machine,
flash butt welding machine, energy storage resistance welding machine,
inverter AC resistance welding machine, separately-sold resistance welding
transformer and mechanical equipment driven welding machine.
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 156, Standard Voltages
GB/T 2900.22, Electrotechnical terminology - Electric welding machine
GB/T 8118, The general specification for arc welding machines
GB/T 8366, Resistance welding - Resistance welding equipment -
Mechanical and electrical requirements
GB/T 14549-1993, Quality of Electric Energy Supply - Harmonics in Public
Supply Network
GB 15578, Safety requirements for resistance welding machine
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
2900.22, GB/T 8118, GB/T 15579.1, GB/T 8366, GB 15578, and GB/T 25301
as well as the followings apply.
3.1 minimum allowable values of energy efficiency for welding machines
The maximum guaranteed value of allowable efficiency of an arc welding
machine in the rated state, the maximum limit of short circuit loss allowed by a
resistance welding machine in the rated gear, under standard-specified test
conditions.
3.3 short circuit loss for resistance welding machine
The active power input to a resistance welding machine when the secondary
winding of the resistance welding machine (where applicable, including a
rectifier) is in the best short circuit condition, and at the rated gear position, an
appropriate voltage at the rated frequency is applied to the primary winding of
the resistance welding machine, when the current flowing through the primary
winding is the continuous input current I1P of the resistance welding machine.
4 Energy efficiency grades of welding machine
The energy efficiency grade of welding machine is divided into 3 grades, where
grade 1 is the highest energy efficiency. The energy efficiency indicators of arc
welding machines at all grades shall comply with corresponding provisions in
Table 1 ~ Table 6.
5 Technical requirements
The minimum allowable values of energy efficiency for welding machines shall
be grade 3 energy efficiency, where the efficiency (%) of the arc welding
machine shall not be lower than the grade 3 requirements in Tables 1 ~ Table 6
and the short circuit loss for resistance welding machine shall not be higher
than the grade 3 requirements in Table 7 ~ Table 10.If the nominal load duration
of resistance welding machine is 50%, the power S50, not consistent with the
S50 determined in Tables 7 ~ Table 10, it shall comply with the provisions on
grade 3 corresponding to the adjacent small nominal power S50.
6 Test methods
6.1 Test conditions
A new, dry, and fully-installed welding machine shall be tested at an ambient
Nominal power S50 of
6.3 Power supply
6.3.1 Classification and parameters of power supply mode
When measuring the energy efficiency indicators of arc welding machines and
resistance welding machines, if grid power is used, the power of the input power
inlet of the welding machine shall meet the requirements of 6.3.2.
6.3.2 Grid power supply
The power supply shall meet the requirements of GB/T 156 and meet the
following requirements.
6.3.3 Variable frequency power supply
When measuring the energy efficiency of an inverter resistance welding
machine, it requires variable frequency power supply or power supply by
variable frequency controller of resistance welding machine. In addition to self-
power supply by inverter controller that supports the resistance welding
machine, the inverter power supply to the inverter resistance welding machine
6.4 Test site layout
6.4.1 Welding machine layout
When conducting the energy efficiency test on welding machines, the test site
layout of welding machines shall meet the following requirements.
6.4.2 Input cable layout
When conducting the energy efficiency test on welding machines, the input
cable layout shall meet the following requirements.
6.4.3 Measuring device layout
When conducting the energy efficiency test on welding machines, the
measuring device layout shall meet the following requirements.
6.5 Energy efficiency measurement of welding machines with two or more
welding functions
If a welding machine has two or more welding functions, its energy efficiency
test shall meet the following requirements.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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