GB/T 25296-2022 English PDF (GBT25296-2022)

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GB/T 25296-2022: Guidelines on general tests for safety of electrical equipments
GB/T 25296-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.020
CCS K 09
Replacing GB/T 25296-2010
Guidelines on general tests for safety of electrical equipment
ISSUED ON: JULY 11, 2022
IMPLEMENTED ON: FEBRUARY 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 4
Introduction ... 6
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 9
4 General ... 10
4.1 General principle ... 10
4.2 Testing methods ... 10
4.3 Testing rules ... 10
4.4 Checking test ... 11
5 Basic laboratory conditions ... 11
5.1 Ambient temperature ... 11
5.2 Ambient relative humidity ... 11
5.3 Altitude and correction factor ... 12
5.4 Influence of other factors ... 12
6 Testing of safety item ... 12
6.1 Environmental suitability test ... 12
6.2 Surface checking ... 12
6.3 Safety extra-low voltage inspection ... 12
6.4 Enclosure protection level test ... 13
6.5 Protective grounding checking ... 13
6.6 Fault additional protection testing ... 13
6.7 Functional grounding inspection ... 13
6.8 Noise test ... 13
6.9 Manufacturing material limit inspection... 13
6.10 Safe handling checking ... 14
6.11 Clearance checking ... 14
6.12 Creepage distance checking ... 14
6.13 Insulation resistance test ... 14
6.14 Leakage current test ... 14
6.15 Inspection of insulation penetration distance ... 14
6.16 Surface tracking resistance test ... 15
6.17 Test of ability to withstand impulse voltage test ... 15
6.18 Test of ability to withstand AC power frequency voltage test ... 15
6.19 Internal temperature rise test ... 16
6.20 Basic insulation protection test ... 16
6.21 Insulation structure protection inspection ... 16
6.22 Heat resistance test ... 16
6.23 Flame retardant properties test ... 16
6.24 Test of ability to withstand shock test ... 16
6.25 Test of ability to withstand impact test ... 16
6.26 Test of ability to withstand free drop test ... 17
6.27 Test of ability to withstand vibration (sinusoidal) test ... 17
6.28 Mechanical stability inspection ... 17
6.29 Checking and test of mechanical structures for protection ... 17
6.30 Inspection of screws and couplings for electrical connections ... 17
6.31 Internal wiring structure checking ... 17
6.32 Terminal inspection of external conductors... 17
6.33 Power connection and external cord inspection ... 18
6.34 Power control test ... 18
6.35 Checking of startup and operation ... 18
6.36 Surface temperature test ... 18
6.37 Operational structural protection inspection ... 18
6.38 EMC characteristic test of electronic circuit ... 19
6.39 Safety color checking ... 19
6.40 Graphical symbol checking ... 19
6.41 Safety sign checking ... 20
6.42 Nameplate checking ... 20
6.43 Instruction manual checking ... 20
Bibliography ... 21
Guidelines on general tests for safety of electrical equipment
1 Scope
This document gives general test methods for safety to which electrical equipment shall
be subjected after it has been designed.
This document applies to the testing related to electrical equipment including type test
and routine (exit-factory) test.
NOTE: Due to the different types of electric shock protection for electrical equipment, the testing
items will be different. For example, there are power supply systems with double insulation structure
and extra-low safety voltage.
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 1002-2008, Single phase plugs and socket-outlets for household and similar
purposes - Types, basic parameters and dimensions
GB/T 1003-2016, Three phases plugs and socket-outlets for household and similar
purposes - Types, basic parameters and dimensions
GB/T 1031-2009, Geometrical product specifications (GPS) - Surface texture:
Profile method - Surface roughness parameters and their values
GB/T 2099 (all parts), Plugs and socket-outlets for household and similar purposes
GB/T 2423.1-2008, Environmental testing for electric and electronic products - Part
2: Test methods - Tests A: Cold
GB/T 2423.2-2008, Environmental testing for electric and electronic products - Part
2: Test methods - Tests B: Dry heat
GB/T 2423.3-2016, Environmental testing - Part 2: Testing method - Test Cab:
Damp heat, steady state
GB/T 2423.5-2019, Environmental testing - Part 2: Test methods - Test Ea and
guidance: Shock
GB/T 17626.2, Electromagnetic compatibility - Testing and measurement techniques
- Electrostatic discharge immunity test
GB/T 17626.4, Electromagnetic compatibility - Testing and measurement techniques
- Electrical fast transient/burst immunity test
GB/T 17626.5, Electromagnetic compatibility - Testing and measurement techniques
- Surge immunity test
GB/T 17626.6, Electromagnetic compatibility - Testing and measurement techniques
- Immunity to conducted disturbances, induced by radio-frequency fields
GB/T 17626.11, Electromagnetic compatibility - Testing and measurement
techniques - Voltage dips, short interruptions and voltage variations immunity tests
GB/T 17627-2019, High-voltage test techniques for low-voltage equipment -
Definitions, test and procedure requirements, test equipment
GB/T 25295-2010, Guidelines on safety designs for electric equipment
GB/T 26125-2011, Electrical and electronic products - Determination of six
regulated substances (lead, mercury, cadmium, hexavalent chromium,
polybrominated biphenyls, polybrominated diphenyl ethers)
GB/T 26572-2011, Requirements of concentration limits for certain restricted
substances in electrical and electronic products
GB/T 29481-2013, Signs for electrical safety
GB/T 33980-2017, Guide on inclusion of electrical safety aspects in electrotechnical
product instructions
GB/T 34662-2017, Electrotechnical equipment - Temperatures of touchable hot
surfaces
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T 4776-
2017 as well as the followings apply.
3.1 testing
The activity of procedurally determining one or more characteristics of a product or
service.
3.2 checking
The activity of relying on professional judgment to compare one or more characteristics
of a product or service with specified requirements to determine its compliance.
3.3 inspection
The activity of comparing one or more characteristics of a product or service with
specified requirements by performing measurements, tests, or metrics to determine its
compliance.
3.4 test
The activity of conducting some or various special tests on one or more characteristics
of a product or service according to a prescribed procedure.
[Source: GB/T 2900.83-2008, 151-16-13, modified.]
3.5 verification
The activity confirmed by test.
4 General
4.1 General principle
The testing rules proposed in this document are generic to electrical safety items.
Electrical equipment can generally be tested according to product or professional
standards. In the absence of product or professional standards, this document may be
relied upon.
4.2 Testing methods
The testing methods used in this document include check...