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GB 19517-2023 (GB19517-2023)

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GB 19517-2023English320 Add to Cart 0--9 seconds. Auto-delivery National technical specification for the safety of electric equipments Valid GB 19517-2023

BASIC DATA
Standard ID GB 19517-2023 (GB19517-2023)
Description (Translated English) National technical specification for the safety of electric equipments
Sector / Industry National Standard
Classification of Chinese Standard K09
Classification of International Standard 29.020
Word Count Estimation 24,236
Date of Issue 2023-05-23
Date of Implementation 2024-06-01
Older Standard (superseded by this standard) GB 19517-2009
Administrative Organization Ministry of Industry and Information Technology of the People's Republic of China
Proposing organization Ministry of Industry and Information Technology of the People's Republic of China
Issuing agency(ies) State Administration for Market Regulation, National Standardization Management Committee

Standards related to: GB 19517-2023

GB 19517-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.020
CCS K 09
Replacing GB 19517-2009
National Technical Specification for the Safety of Electric
Equipment
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: JUNE 1, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 4
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 7
4 General Rules ... 7
4.1 Safety Level ... 7
4.2 Relations between Chapter 5 and Chapter 6 ... 7
5 Requirements for Electrical Safety Hazard Protection ... 8
5.1 General Requirements ... 8
5.2 Protection against Electric Shock Hazards ... 8
5.3 Protection against Mechanical Hazards ... 9
5.4 Protection against Electrical Connection and Mechanical Connection Hazards ... 10
5.5 Protection Against Operating Hazards ... 11
5.6 Power Control and Its Hazard Protection ... 11
5.7 Protection against Other Hazards ... 12
6 Requirements for Safety Items ... 13
6.1 Environmental Adaptability ... 13
6.2 Surfaces ... 14
6.3 Safety Extra-low Voltage ... 14
6.4 Enclosure and Protection Degrees ... 14
6.5 Protective Grounding ... 15
6.6 Additional Fault Protection ... 16
6.7 Functional Grounding ... 17
6.8 Noise ... 17
6.9 Limits of Manufacturing Materials ... 17
6.10 Safe Handling ... 17
6.11 Electrical Clearances ... 17
6.12 Creepage Distance ... 17
6.13 Insulation Resistance ... 18
6.14 Leakage Current ... 18
6.15 Distance through Insulation ... 18
6.16 Surface Tracking Resistance ... 19
6.17 Resistance to Impulse Voltage Test ... 19
6.18 Resistance to AC Power Frequency Voltage Test ... 19
6.19 Internal Temperature Rise ... 19
6.20 Basic Insulation Protection ... 19
6.21 Insulation Structure Protection ... 20
6.22 Heat Resistance ... 21
6.23 Flame Retardant Properties ... 22
6.24 Resistance to Impact Test ... 22
6.25 Resistance to Crash Test ... 22
6.26 Resistance to Free Drop ... 22
6.27 Resistance to Vibration (sine) Test ... 22
6.28 Mechanical Stability ... 22
6.29 Mechanical Structure Used for Protection ... 23
6.30 Screws and Connectors Used for Electrical Connections ... 23
6.31 Internal Wiring ... 24
6.32 Terminals for External Wires ... 26
6.33 Power Connections and External Flexible Cords ... 26
6.34 Power Control ... 29
6.35 Startup and Operation ... 29
6.36 Surface Temperature ... 30
6.37 Structural Protection of Operation ... 30
6.38 EMC Characteristics of Electronic Circuits ... 31
6.39 Safety Colors ... 31
6.40 Graphic Symbols ... 31
6.41 Safety Signs ... 32
6.42 Nameplate ... 32
6.43 Instruction Manual ... 33
7 Inspection and Testing Methods and Qualification Determination ... 35
7.1 General Rules ... 35
7.2 Inspection Rules ... 35
National Technical Specification for the Safety of Electric
Equipment
1 Scope
This document specifies the basic safety requirements for various types of hand-held, movable
and fixed electric equipment for indoor and outdoor application with a rated AC voltage below
1,000 V (1,140 V) and a rated DC voltage below 1,500 V (hereinafter referred to as “the
products”).
This document is applicable to products or components within the application range of electric
energy converted from chemical energy, light energy and wind energy, etc.
Products with internally generated inaccessible AC voltages higher than 1,000 V and DC
voltages higher than 1,500 V also fall within the scope of application of this document.
This document does not apply to:
---Materials and auxiliary materials, other than those for the products specified in this
document;
---Semi-finished products or primary products that cannot be independently used;
---Electric equipment for medical purposes;
---Elevators;
---Electric fence actuators;
---Special products, such as: ships, aircrafts and railways, etc.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 3805 Extra-low Voltage (ELV) - Limit Values
GB/T 4208 Degrees of Protection Provided by Enclosure (IP code)
GB/T 4776 Electrical Safety Terminology
6.2 Surfaces
The surfaces of the products in all directions (including the enclosure and the parts that are
accessible during normal use) shall be smooth, without sharp edges, burrs, scratches, overflows,
etc., and without obvious cracks.
Metal materials (including conductor materials) shall be treated with surface coating.
The surface of the insulating materials shall be uniform and flat, and without obvious defects,
such as: unevenness, cracks, impurities, trimmings and uneven colors, etc.
6.3 Safety Extra-low Voltage
The power supply voltage of the products shall comply with the stipulations of GB/T 3805.
6.4 Enclosure and Protection Degrees
The requirements for the enclosure and protection degrees include the following aspects.
a) The requirements that the product enclosure shall satisfy include, but are not limited
to:
1) At least isolate all live parts (except those that are completely insulated), or the
power supply cannot be restored before the enclosure is closed or reset;
2) Locate or enclose moving and hazardous parts, so that sufficient protection
against personal injury can be provided during normal operation;
3) Cannot be dismantled or removed without the aid of tools;
4) There shall be no other dangers when using or adjusting the protective guard. If
the fixed guard is removed in accordance with the stipulations, then, the fasteners
shall always be on the guard or the product;
5) After removal of the maintenance cover, the protection against access to live
parts can also be ensured;
6) After the dust collection device (if any) is removed, it can also be ensured that
hazardous moving parts cannot be accessed.
b) The requirements for the protection degrees of the enclosure include:
1) Comply with the stipulations of GB/T 4208, and the IP degree code must not be
marked without testing;
2) The protection degree of the enclosure used to protect against direct contact is at
least IP2XC.
2) If devices with voltages exceeding the extra-low voltage limit are installed on
covers, doors and shutters, etc., then, additional measures, such as protective
conductors (PE) or similar electrical connections specially designed and verified
for this purpose shall be adopted to ensure the grounding continuity;
3) When a part of the products is moved, the protective circuit (grounding
continuity) of the remaining of the products shall not be interrupted;
4) Disconnecting devices (switches and isolators, etc.) shall not be included in the
protective circuit, unless: removable connections are allowed in the protective
conductor, and they can only be moved by authorized personnel with the aid of
tools; alternatively, the plug and socket devices can only cut off the protective
circuit after the live conductor is cut off, and before the live conductor is
reconnected, the continuity of the protective circuit shall be established;
5) If the exposed conductive part of the devices cannot be connected to the
protective circuit by the fixing method of the devices, then, a conductor with a
sufficiently large cross-sectional rea shall be used to connect to the protective
circuit of the products;
6) The printed wires of the printed circuit boards shall not generally be used to
provide the continuity of the protective grounding circuit;
7) Bearings can be considered to satisfy the electrical continuity.
e) All conductive parts shall have anti-corrosion measures.
f) The electrical continuity shall be such that the resistance between any accessible
conductive part on the products and the grounding terminal or grounding contact shall
not be greater than 0.1 .
6.6 Additional Fault Protection
The requirements for additional fault protection include the following aspects.
a) For general products, the additional fault protection is at least one of the following
three types:
1) Automatic cut-off, for Category I equipment, low-voltage fuses and circuit
breakers, etc. shall be plugged or installed between the power supply system and
Category I equipment;
2) Electrical isolation shall adopt isolation transformers and safety isolation
transformers;
3) Residual current device (RCD).
b) For products with a liquid source system, the additional protection mode shall be one
of the follow:
1) Type III structure;
2) For Type II structure, portable residual current device (PRCD) shall be adopted;
3) Type I or Type II structure is used together with the isolation transformer.
c) If the products contain equipment (for example, capacitors) that may have a steady-
state touch current and charge after they are disconnected, then, a warning sign shall
be installed.
6.7 Functional Grounding
The functional grounding of the products shall be clearly and durably marked with the
functional grounding symbol, and the functional grounding symbol cannot be mixed with the
protective grounding symbol; the functional grounding device cannot be directly connected to
the protective grounding device
For Category II and Type III equipment, the live parts and functional grounding parts shall be
separated by double insulation or reinforced insulation.
6.8 Noise
The noise limit value (or the noise limit value after adopting noise reduction measures) shall
comply with the relevant national regulations.
6.9 Limits of Manufacturing Materials
The varieties and content limits of manufacturing materials restricted for use shall comply with
the relevant national regulations.
6.10 Safe Handling
The requirements for safe handling include:
a) Lifting rings or similar devices for handling shall be provided on the enclosure of
fixed products with a mass exceeding 30 kg;
b) When the lifting rings are used, the screw holes of the enclosure shall have sufficient
screwing length, and there shall be a plane matching the lifting rings.
6.11 Electrical Clearances
The electrical clearances shall comply with the stipulations of 5.1 in GB/T 16935.1-2008.
6.12 Creepage Distance
The creepage distance shall comply with the stipulations of 5.2 in GB/T 16935.1-2008.
b) The supplementary insulation or reinforced insulation is not easily accessible, and the
following conditions are satisfied:
After 7 d (168 h) of treatment in an oven where the temperature is maintained at a
temperature 50 K higher than the highest temperature rise measured during the
specific heating test, the insulation can withstand the electric strength test, which is
carried out both at oven temperature and approximate to room temperature.
6.16 Surface Tracking Resistance
The comparative tracking index (CTI) value of the materials of the insulating parts shall not be
less than 175 V.
6.17 Resistance to Impulse Voltage Test
For air insulation and solid insulation, they shall comply with the stipulations of 6.1 in GB/T
16935.1-2008.
6.18 Resistance to AC Power Frequency Voltage Test
For solid insulation, it shall comply with the stipulations of 6.1 in GB/T 16935.1-2008.
6.19 Internal Temperature Rise
The allowable temperature rise of internal heating components shall be specified by the
manufacturer, or in accordance with the requirements of GB/T 14048.1.
6.20 Basic Insulation Protection
The requirements for the basic insulation protection include, but are not limited to:
a) The live parts and not easily accessible metal parts shall be separated by basic
insulation;
b) The not easily accessible metal parts and the accessible metal parts or accessible
surfaces shall adopt supplementary insulation barriers;
c) The live parts and accessible metal parts or accessible surfaces shall adopt double
insulation or reinforced insulation barriers;
d) Varnishes, enamels, plain papers, cotton fabrics, oxide films on metal parts, glass
powder or sealants (except self-hardening resin) shall not constitute the protection
required against access to live parts;
e) Wood, cotton, silk, plain paper and similar fibrous or hygroscopic materials, if not
impregnated, shall not be used as insulation. If the spaces between the fibers of the
materials are filled with a suitable insulating substance, then, the insulating material
is considered to be impregnated;
f) Belts shall not be relied upon to provide the required insulation, unless a specially
designed belt is incorporated in the products to prevent improper replacement;
g) The parts protruding from the enclosure shall be made of insulating materials for
handles and gripping surfaces, or shall be adequately covered with insulating
materials if they are metallic. For rotating shafts, the accessible parts and live parts
shall be separated by insulation.
6.21 Insulation Structure Protection
The requirements for the insulation structure protection include the following aspects.
a) The requirements for Category I equipment (products) include:
1) When any wires, screws, nuts, washers, springs, electric brushes, brush holder
assemblies or similar parts related to insulation are loose or fall off from their
positions, they shall not be accessible to the live parts;
2) Where there are structural requirements for creepage distance and electrical
clearance, partitions shall be provided, or the parts shall be adequately fixed, and
once such parts become loose or fall off from their positions, the creepage
distance and electrical clearance on the supplementary insulation or reinforced
insulation shall not be reduced below 50% of the specified values;
3) Handles, operating rods and operating buttons shall be reliably connected to the
grounding terminal or grounding contact, or the grounding metal parts shall be
sued to separate the live parts.
b) The requirements for Category II equipment (products) include:
1) It shall be sufficient to prevent accidental contact with the basic insulation and
the metal parts, which are separated from the live parts by basic insulation only;
2) The parts used as supplementary insulation or reinforced insulation shall be so
fixed that they cannot be removed without serious damage, or cannot be
repositioned in an incorrect position, if missing, the products will be inoperable
or manifestly incomplete (as long as the partitions are so fixed that they cannot
be removed unless being broken or cut apart);
3) The structure fixed by bonding shall not fall off when subjected to mechanical
strength verification;
4) For non-fully insulated Category II equipment or Type II structure, insulation
barriers shall be provided between the accessible metal parts and motor parts and
other live parts;
5) The insulating linings or insulating coatings within metal enclosures shall not be
easily scratched off. Ordinary varnishes, impregnated yellow wax cloth, soft
---Components of thermoplastic materials providing supplementary insulation and
reinforced insulation.
For the following materials, the thermal deformation resistance may not be required:
---Ceramic materials;
---Insulation parts of motors, such as: shaft insulation, end plates, slot insulation, slot
wedges and commutators, etc.
6.23 Flame Retardant Properties
The non-metallic material parts on the products shall have sufficient resistance to flame and
flame spread.
6.24 Resistance to Impact Test
The products shall be able to withstand the specified impact test.
The severity level of the test is specified by the manufacturer.
6.25 Resistance to Crash Test
The products shall be able to withstand the specified crash test.
The severity level of the test is specified by the manufacturer.
6.26 Resistance to Free Drop
The products shall be able to withstand the specified free drop test.
The severity level of the test is specified by the manufacturer.
6.27 Resistance to Vibration (sine) Test
The products shall be able to withstand the vibration (sine) test.
The severity level of the test is specified by the manufacturer.
6.28 Mechanical Stability
The requirements for the mechanical stability include, but are not limited to:
a) Both movable and fixed products shall have sufficient stability;
b) For products with doors, the doors, opened or closed (whichever is the more
unfavorable), shall be able to satisfy the corresponding stability test;
c) Movable products equipped with wheels shall have sufficient stability during the
movement.
6.29 Mechanical Structure Used for Protection
The requirements for the mechanical structure used for protection include, but are not limited
to:
a) The mechanical structure used for protection cannot be removed without the aid of
tools;
b) For the protective mechanical structure that can be disassembled by hands, when it is
removed, the protection degree provided by the enclosure shall at least reach the
requirements of IP20;
c) When the protective mechanical structure is removed (disassembled or opened) and
the live parts (or components) are touched, then, the power supply shall be
disconnected (if necessary, the power input terminal shall be grounded) before the
protective mechanical structure is removed, and the power supply cannot be
reconnected (interlocking) unless the protective mechanical structure is restored;
d) The mechanical structure used for protection shall always be installed on the products
in accordance with the state of normal use and undergo all the inspections.
6.30 Screws and Connectors Used for Electrical Connections
The requirements for the screws and connectors used for electrical connections include the
following aspects.
a) The requirements for the screws include:
1) They shall not be made of soft or prone to creep metals, such as: zinc and
aluminum;
2) The screws made of insulating materials shall have a nominal diameter of at least
3 mm, and shall not be used for any electrical connection or connection providing
grounding continuity;
3) The screws transmitting electrical contact pressure shall be screwed into the
metal;
4) If the replacement of the screws made of insulating materials by metal screws
would impair the supplementary insulation or reinforced insulation, or when
replacing the power supply cords with Type X connection, or the removal during
user maintenance would impair the basic insulation, then, the screws shall not be
made of insulating materials;
5) Wide-thread screws shall not be used for the connection of current-carrying parts,
unless the current-carrying parts clamped by these screws are directly connected
to each other and there are suitable locking measures;
parts;
5) The flexible metal pipes shall not damage the insulation of the conductors
contained within them. The loose spring coils shall not be used to protect the
internal wiring. If twined spring coils with adjacent coils closely spaced are used
to protect the internal wiring, then, sufficient insulating liners shall be attached
to the wire insulation;
6) The clasps and similar devices for binding cords shall be smooth and rounded.
b) The requirements for the use of wires:
1) The internal wiring shall be rigid, or so fixed or insulated that the creepage
distance and electrical clearance cannot be reduced below the specified values in
normal use. The insulation shall not be impaired;
2) The wires marked with green / yellow combination colors shall not be connected
to non-grounded terminals;
3) Aluminum wires shall not be used for internal wiring.
c) The requirements for wire connection:
1) Unless the clamping device is so designed that there is no risk of poor contact
due to welding cold deformation, stranded conductors shall not be consolidated
by tin solder where they are subjected to contact pressure. Soldering together of
the ends of stranded conductors is allowed;
2) If elastic terminals are used, then, it is allowed to consolidate the stranded
conductors with tin solder. Merely tightening the clamping screws is considered
insufficient.
d) During normal use or adjustment operation or user maintenance, the different parts of
the products that can move relative to each other shall not trigger affecting stress to
the electrical connectors and internal wires (including wires providing grounding
continuity).
e) When replacing flexible cables or cords, if it is necessary to move switches which
also serve as the terminals for external wires, then, the internal wiring shall not be
subjected to undue stress. After the switches are repositioned and before the electric
equipment is reassembled, it shall be possible to verify that the internal wiring is
properly in place.
f) The internal wiring, windings, commutators, slip rings and the like, as well as
insulation shall not come into contact with oil, grease or other similar substances.
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