This part is equivalent to IEC 60364-5-53:2001 "Electrical installations of buildings Part 5-53: Selection and installation of electrical equipment - Disconnectors, switches and control devices" 2002 first revision. GB 16895.22-2004 Electrical installations of buildings Part 5-53: Selection and installation of electrical equipment - Disconnectors, switches and control devices Section 534: Overvoltage protection devices GB16895.22-2004 Standard download decompression password: www.bzxz.net

ICS 91. 140. 50
National Standard of the People's Republic of China
GB16895.22—2004/1EC60364-5-53:2001A1:2002Electrical installations of buildings-Part 5-53:Selection and erection ofelectrical equipmenlIsolation, swilching and control---Section 534:Devices for protection against overvoltages(IEC 60364-5-53:2001 A1:2002.IDT) Issued on December 13, 2004
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
Implemented on June 1, 2005
GB 16895.22—2004/IEC60364-5-53:2001 A1;2002 Foreword
The technical content of this part is mandatory. The "Electrical Installations in Buildings" series of national standards includes the following 7 parts: Part 1 Scope, purpose and basic principles
Part 2
Part 3
Part 4
Part 5
General characteristics
Full protection
Selection and installation of electrical equipment
Part 6
Part 7
Requirements for special installations or locations
This part is Section 534 of Part 5-6
This part is equivalent to IEC60364-5-53:2001 "Electrical Installations in Buildings Part 5-53: Selection and installation of electrical equipment isolation, switchgear and control equipment" 2002 first revision. For ease of use, this part deletes the foreword of the international standard. Appendix A, Appendix B, Appendix C of this part Appendix L is an informative appendix. This part was proposed by the China Electric Power Industry Association and is under the jurisdiction of the National Technical Committee for Standardization of Electrical Installations in Buildings. The responsible drafting units of this part are: China Electric Design Institute, Schneider Electric (Zhongrun) Investment Co., Ltd., Beijing Ailao High-tech Co., Ltd., Nantong Xinda Electric Co., Ltd., and Guangzhou Xuxun Electronics Co., Ltd. The main drafters of this part are Feng Zongheng, He Xiangyao, Zhang Yan, Ruan You, Liu Gang, Zhao Hanxiang, and Song Hongwei. 534.1 General provisions
GB16895.22--200471H60364-5-53:2001A1:2002 Electrical installations in buildings Part 5-53: Selection and installation of electrical equipment, isolation, Switchgear and Control Equipment Section 534: Overvoltage Protection Devices
This part specifies the application of voltage suppression measures to achieve the insulation coordination requirements specified in TEC60364-4-44 Electrical Installations of Buildings Part 4-44: Safety Protection against Voltage Disturbances and Electromagnetic Down-disturbance Protection", 1F6664-1&Insulation Coordination of Equipment in Low Voltage Systems Part 1: Principles, Requirements and Tests 2, IFC.6[312-2 Lightning Electromagnetic Shock Protection (1.FMP) Part 2: Grounding Shielding of Buildings, Connection Grounding Inside Buildings" and IEC61643-12 Low Voltage Distribution System Power Supply Protectors (SPD) Part 12: Performance Requirements and Test Methods.
This standard gives requirements for the selection and installation of surge protectors (SPDs): surge protective devices (SPDs) installed for electrical installations in buildings to limit atmospheric transient overvoltages and operating overvoltages transmitted from the power distribution system,
- surge protectors (SIDs) used in buildings equipped with lightning protection devices to prevent transient overvoltages caused by direct lightning strikes or lightning strikes in the vicinity of the building.
This standard does not include surge protective components that may be assembled inside equipment connected to electrical installations. The components in this case may change the characteristics of the main current protector of the electrical installation; and additional coordination may be required. This standard applies to AC circuits. For DC circuits, the requirements of this standard may also be applied within its scope of application. In special cases, if other or additional requirements are required, they may be specified in the relevant chapters of Part 7 of IEC60364. 534.2 Selection and installation of surge protective devices (SPD) in building electrical installations 534.2.1 Application of surge protective devices (SPD) Section 443 of IEC60364-4-44 stipulates protection against atmospheric overvoltage (indirect, remote lightning strikes) and operational overvoltage. Usually this protection is provided by installing a surge protective device (SPP) that has passed the Class II test, and when necessary, by installing a surge protective device (SPD) that has passed the Class III test. According to the requirements of TEEfi0364-4-44 or otherwise specified, the surge protector (SP[D) should be installed near the power supply line terminal of the building gas device, or installed in the complete set of power distribution equipment closest to the power supply line terminal of the electrical device in the building. IFEC61312-1 "Lightning Electromagnetic Shock Protection Part 1: General Principles\, including protection against direct lightning strikes or lightning strikes in the power supply system near the curtain, IECG13I2-3 Lightning Electromagnetic Shock Protection Part 3: Requirements for Surge Protective Devices (SPDS)" stipulates the correct selection and application of surge protectors (SPDs) according to the concept of lightning protection zone (LFZ) zoning. According to the original measurement instructions for the installation requirements of surge protectors (SPDs) that have passed the Class I test, Class I test and sub-class test of the lightning protection zone (I.PZ) When it is necessary to comply with the requirements of IEC61312-1 or other regulations, the surge protector (SPD) should be installed at the power supply line terminal of the electrical device.
Protection of sensitive equipment may require the addition of a surge protector (SPD), which should be coordinated with the surge protector (SPD) installed in the previous stage (see 532.2.3.6). When the surge protector (SPD) is part of the electrical installation to be installed, but is not installed in the distribution board (for example, in the socket), its location should be marked with a label or buried as close to the incoming line as possible. 534.2.2 Connection of surge protective device (SPD) The surge protective device (SPD) at the power supply input terminal of the electrical installation or its vicinity should be connected between at least the points listed below (see Appendix AGB 16895.22-2004/IEC 60364-5-53:2001 A1:2002 Appendix B and Appendix C):
a) When the neutral line is directly connected to the PE (protective line) or there is no neutral line at the power supply input terminal of the electrical installation or its vicinity: connect between each phase line and the main grounding terminal or the main protective line. Take the shortest path; Note: In the IT system, an impedance is connected between the neutral line and the PE line, and the two cannot be considered to be directly connected. b) When the neutral line and PE (protective line) are not directly connected at the power input terminal of the electrical device or near it: Wiring form 1: connected between each phase line and the main grounding terminal or the main protective line, and between the neutral line and the main grounding terminal or protective line, whichever has the shorter path.
Wiring form 2: connected between each phase line and the neutral line and between the neutral line and the main protective terminal or protective line, whichever has the shorter path.
Note: If a phase line in the system is connected, in this part, it is considered to be equivalent to neutral line grounding. Surge protective devices (SPD) are installed at or near the power supply line end of the electrical device. The installation is generally as shown in Appendix A to Appendix C and complies with Table 5313. Table 53B Connection of surge protective devices (SPD) determined by system characteristics System characteristics of surge protective device installation points SPD connected between each phase line and neutral line Between each phase and PE line Between neutral line and PF line Between rail line and PEN line Between phase lines TT system Installation basis Form 1: Mandatory installation of surge protective devices NA: Not applicable. Manual: Additional surge protective devices can be installed when necessary. Wiring Form 2 534.2.3 Selection of surge protective device (SPD) TN-C
TN·S system
Installation basis
Form 1
Form 2
IT system with neutral line extraction
Installation basisbzxz.net
Form 1
Form 2
IT system without neutral line extraction SPD (SFD) should comply with the requirements of IEC61643·1 ("Surge protection devices connected to low voltage distribution systems - Part 1: Performance requirements and test methods" (GB18802.1)). For other information on the selection and application of surge protective devices (SPD), see 1EC61643-12.534.2.3.1 The selection of voltage protection level (U,) should be based on IEC60361-4-44 Section 413 When a surge protector (SPD) is installed according to the requirements of IEC 6036-4-44, its voltage protection level (U.) shall comply with the provisions of Class II impulse withstand voltage in Table 44B of IEC 6036-4-44. When a surge protector (SPD) is installed to protect against overvoltage caused by direct lightning according to the requirements of IEC 61312-1, its voltage protection level shall also comply with the provisions of Class II impulse withstand voltage in Table 44B of IEC 6036-4-44. For example, the voltage protection level U of the surge protector (SPD) in a 230/40) V electrical device shall not exceed 2.5 kV. When the wiring form 2 is adopted according to 534.2.2, the total voltage protection level of the surge protector (SPD) connected between the phase line and the PE line shall also comply with the above requirements.
If the required voltage protection level cannot be achieved with a set of intermediate protection devices (SFD), an additional coordinated surge protector (SPD) shall be used to ensure that the required voltage protection level is achieved. 534.2.3.2 Selection of continuous working voltage (U.) The maximum continuous working voltage L. of the surge protective device (SPD) shall not be lower than the value in Table 53C. GB 16895.22--2004/1EC 60364-5-53:2001 A1:2002 Table 53C Determine the minimum L. voltage value of the surge protective device (SPD) according to the characteristics of the power supply system System characteristics of the distribution network
TT system
Between each phase line and the neutral line
Between each phase line and PE line
Between the neutral line and the PF line
Between each line and the PEN line
VA: Not applicable.
Note 1: U. refers to the phase voltage in the low-voltage system. Note 2: This table is based on GB18802.1
TN C system
TN-S system
These values ​​correspond to the most severe fault conditions and therefore do not take into account the margin for 11. 534.2.3.3 Selection of withstanding temporary overvoltage (TOV)
IT system with connected neutral conductor
IT system without connected neutral conductor
Destruction voltage
The surge protector (SIPD) selected in accordance with 534.2.3 shall be able to withstand the temporary overvoltage caused by a low-voltage system fault (see Section 442 of IEC 60364-4-44). The selected surge protector (SPD) shall be confirmed to meet the above requirements in accordance with the test requirements for surge protectors (SPD) in 7.7.6 of IEC61643-1 (GB18302.1).
In order to work reliably in the case of temporary overvoltage caused by earth fault in high voltage system (see IEC 69364 4.44 Section 442): the surge protector (SD) connected to PE line 1 should be able to pass the test requirements of 7.7.4 surge protector (SPD) of [IEC 61643-1 (CB18802.1)].
In addition, the surge protector (SPD) installed in position 1a according to Appendix Figure 13.2 should be able to withstand the test requirements of temporary overvoltage of leakage protector (SPD) specified in 7.7.4 of IEC 61643-1 (GB18302.1). Note: The meaning of the appropriate test standard is under consideration. Note 2: This part does not include the requirements for the risk of line disconnection. Although there is no clear test requirement in the current IEC 61643-1, it is expected that the surge protector (SPI) will work reliably even if the performance is reduced when it fails. 534.2.3.4 Selection of discharge current (I) and impulse current (I) When a surge protective device (SPI) is installed in accordance with Section 443 of IEC 60364-4-44, the nominal discharge current I for each protection mode shall not be less than 5 kA8/20.
When a surge protector (SPI) is installed according to 334.2.2 wiring form 2, the nominal discharge current of the SPD connected between the neutral line and the PE line should not be less than 20kA8/20 for the single-phase system H, and should not be less than 10kA8/20 for the single-phase system I. When a surge protector (SP1) is installed according to IEC613i2-1, the impulse current I in accordance with IEC.61643-1 should be calculated according to IEC613i2-1. More specific requirements are given in IEC61643-12. If the current value cannot be determined, the value of each protection mode should not be less than 12.5 kA.
When the surge protector (SPD) is installed according to the wiring form 2 of 334.2.2, the lightning impulse current (m) of the surge protector (SPI) connected between the neutral line and the PE line should be calculated according to the standard similar to the above. If the current value cannot be determined, the I for the two-phase system should not be less than 50 kA, and the Iimp for the single-phase system should not be less than 26 kA. When a single surge protector (SPD) is used to meet the requirements of both IFC61312-1 and IFC:60361-1-41 Section 443.I, and the rated current of 1mg should be consistent with the F value,
534.2.3.5 Selection of expected short-circuit current The short-circuit current (generated when the surge protector (SPD) fails) that the surge protector (SPD) and the overcurrent protector connected to it (installed inside or outside) can withstand together should be equal to or equal to the maximum short-circuit current produced at the installation location. When selecting, the maximum overcurrent protector specified by the SPD manufacturer should be considered. In addition, the rated interrupting current value of the surge protector (SPI) specified by the manufacturer should not be less than the expected short-circuit current value at the installation location, GB 16895.22--2004/1RC 60364-5-53:2001 A1:2002 In TT system or TN system, after the surge protector (SPD) connected between the neutral line and the PE line is operated (e.g. spark gap discharge), the rated interruption current value of the surge protector (SPD) should be greater than or equal to 00A. In the system, the interruption current value of the surge protector (SPD) connected between the neutral line and the PE line is the same as the rated interruption current value of the surge protector (SPD) connected between the phase line and the neutral line. 534.2.3.6 The coordination between surge protectors (SPD) is based on IFC6 I312-3 and 61643-12, the necessary coordination between surge protectors (SPDs) in electrical installations should be considered. The manufacturer of the surge protector (SPD) should provide sufficient information on the coordination between surge protectors (SPDs) in the H file. 534.2.4 Overcurrent protection and protection after failure of the surge protector (SPD) The protection against short circuit of the surge protector (SPD) is to use overcurrent protector F2 (see Appendix A to Appendix I)), which should be selected according to the maximum rated value of overcurrent protection recommended in the surge protector (SPID) product manual. If the rated value of the overcurrent protector FI (F1 is an integral part of the electrical installation, see Appendix A to Appendix D) is less than or equal to the maximum rated value of the recommended overcurrent protector F2, F2 can be omitted. The cross-section of the wire connecting the overcurrent protector to the phase line should be selected according to the possible maximum short-circuit current value (connect F1 as shown in Appendix A to Appendix D).The priority is to ensure the continuity of power supply or the continuity of overvoltage protection, which depends on the location of the overcurrent protector that disconnects the surge protector (SPD) when the surge protector (SPD) fails. In all cases, the selectivity between the installed protectors should be guaranteed: if the overcurrent protector is installed in the circuit of the surge protector (SPD), the continuity of power supply can be guaranteed, but when an overvoltage occurs inside, neither the electrical device nor the equipment can be protected (see Figure 53A). These overcurrent protectors can be disconnected detents installed inside the surge protector (SPD):
If the overcurrent protector is connected to the front end of the gas device with a surge protector (SPI) circuit, the failure of the surge protector (SPD) may cause power interruption, and the power supply can only be restored after the surge protector (SPI) is replaced (see Figure 53B). SPD
F\I) Reverse current protection device of surge protector SPI---Surge protector:
E.1 Electrical device or equipment protected by surge protector Figure 53A Prioritize power supply continuity
Figure 53B Prioritize protection continuity
GB 16895.22--2004/IEC 60364-5-53:2001 A1:2002 In order to improve the probability and reliability of power supply continuity and protection continuity at the same time, the wiring method shown in Figure 53C is allowed. E
Figure 53C takes into account both power supply continuity and protection continuity. This approach is to connect two identical surge protectors (SP1 and SPD2) to two phase-to-phase overcurrent protectors (PD1 and PT2) respectively. When one surge protector (such as SPDI) fails, it will cause its own overcurrent protector to operate (such as PD1), which will not affect the effectiveness of the potential surge protector (such as SPL2). This method will significantly improve the continuity of power supply and protection. 534.2.5 Indirect contact protection
Even when the surge protector (SPT>) fails, the indirect contact protection specified in IFC60364-4-41rf should remain effective for the protected electrical equipment.
When the power supply is cut off by the flap:
In the narrow TN system, an overcurrent protector can generally be installed on the power supply side of the surge protector (SPD) to achieve indirect contact protection. In the T power system, the following a) or b) can be used to achieve indirect contact protection: a) Install the surge protector (SPD) on the load side of the residual current protector (RCD) (see Appendix Figure B1) b) Install the surge protector (SPD) on the power supply side of the residual current protector (RCD). Since the surge protector (SPT) connected between the neutral line and the PE line may also fail, it should comply with the provisions of Article 413.1.3.7 of 160364-4·41. And, surge protectors (SPI3) should be installed according to 534.2.2 Wiring form 2, ...--In JT systems, no additional measures are required. 534.2.6 Surge protectors (SPDs) associated with residual current protectors (RCDs) shall be installed according to the requirements of 534.2.1, and shall be installed on the load of the residual current protector (RCD). The residual current protector (RCD) may be with or without delay, but shall have an anti-interference capability of a full current of not less than 3kA8/20. Note 1: S-type residual current protectors (RCDs) that comply with IEC 610C8-1 and IFC. 6[009-1 standards can meet this requirement. Note 2: When the surge current exceeds 3k.A8/20, the residual current protector may cut off the circuit and cause power supply interruption. 534.2.7 Test of insulation resistance
When testing the insulation resistance of an electrical device in accordance with the provisions of IEC50364-6-61, if the rated voltage of the surge protector (SPD) installed at the power line end of the electrical device or near the power line end of the electrical device or in the distribution cabinet does not reach the specified insulation test voltage, the surge protector (SPD) can be disconnected.
When the surge protector (SPD) is a component of the socket and connected to the PI line, the surge protector (SPD) shall withstand the test voltage for testing the insulation resistance of the electrical device in accordance with the provisions of IEC.60364-6-61. 534.2.8 Surge protector (SPD) status indication The indication when the surge protector (SPD) loses its protection function shall be in one of the following ways: - SPD status indicator: or - a separate surge protector (SPT) protecting the appliance as described in 534.2.4. 534.2.9 Connecting wires
Connecting wires refer to the wires between the phase line and the surge protector (SPT), and the wires between the surge protector (SPD) and the main grounding terminal or protective wire GB 16895.22--2004/1EC: 60364-5-53:2001 A1:2002.
Because increasing the length of the connecting wire of the surge protector (SPD) will reduce the overvoltage protection effect of the surge protector (SPD), the best overvoltage protection effect can be obtained by reducing the length of the wire connected to the surge protector (SPD) as much as possible (the total lead length should not exceed 0.5m) and not forming a loop, see Figure 53D. If the length of α+ shown in Figure 531 cannot be less than 0.5m, the wiring method of Figure 53E can be adopted,
Main grounding terminal or protective busbar
Figure 53D Example of surge protector (SPD) installed at or near the power supply incoming terminal of the electrical device um
Main grounding terminal or protective busbar
Figure 53E Example of surge protector (SFD) installed at or near the power supply incoming terminal of the electrical device 534.2.10 Conductor cross-section of grounding wire
The minimum cross-section of the grounding wire of the surge protector (SPD) installed at or near the power supply incoming terminal of the electrical device should be not less than 4 mm\ of copper wire or its equivalent.
When lightning protection devices are provided, it is necessary that the minimum cross-section of the grounding wire of the surge protective device (SPD) that complies with the Class I test in (B18802.1) is a copper wire of not less than 16 mm2 or its equivalent. PTEN
3-Main grounding terminal or busbar:
GB 16895.22--2004/IEC 60364-5-53:2001 A1:2002 Appendix A
(Informative Appendix)
TN Installation of surge protector (SFI) in the system 111
Residual current protector (SPD) with protection level of Class II impulse overvoltage withstand voltage: 5—Grounding of surge protector (SPD), 5a or 5h6....Equipment protected by surge protector (SPD): F1—Protective device installed at the power supply incoming end of the electrical device: F2—Overcurrent protective device installed as required by the manufacturing of surge protector (SPI): R,—Grounding electrode (grounding resistor) installed in the middle, R.
Grounding electrode (grounding positive) of the power supply system, BL
Figure A.1 Surge protector (SPD) in TN system) PE
GB16895.22—2004/IEC60364-5-53:2001A1:2002 Appendix B
(Informative Appendix)
TT Installation of surge protector (SPD) in the system F1
Main grounding terminal or mother ribbon:
Surge protector (SPI) with protection level of Class II; grounding of surge protector (SPT), a and/or = h; Equipment protected by surge protector (SPD)
Residual current protector (RCI);
-Protective device installed at the power supply incoming line end of the electrical device; F3-
2---Surge protection Device (S1331 manufacturing! Required to install overcurrent protection device R.--.
Electrical device grounding limit:
Power supply system grounding alarm (ground positive). G
Figure B.1 Surge protective device (SPD) installed on the load side of the residual current protector (RCD) N
3.--Total grounding terminal or bus:
Surge protective device (S):
Diantong protection controller SP
GB 16895.22—2004/1EC 60364-5-53:2001 A1:2002o
(4- Jointly provided water-proof half-shock test for health class] 5---……-earthed protective device (SPE) .. and/or 5h; core
Equipment protected by protective expander (SPr)): 1.20
Residual current protector (RCI)) is installed on the load side of the busbar and the power supply is installed on the busbar: F-……A protective device installed at the electrical input end of the electrical device; F? Surge protector (SPI)>Manufacture! Zero current protection device installed: R.--
-Electrical device grounding electrode connection resistance)
Power supply system grounding electrode (grounding resistance) Figure. 2
Surge protector (SFD) is installed on the power supply side of the residual current protector (RCI)) GB16895.22-2004/IEC60364-5-53:2001A1.2002 Appendix C
(Informative Appendix)
Installation of surge protector (SPD) in IT' system 2
Not grounded or
Shangyang earthing
3—…·Main earthing terminal or busbar;
Protection level is and class impulse overvoltage withstand surge protector (SII): surge protector (S grounding, 5a and/or 5b; 6
Equipment protected by leakage protector (SPD): residual current protector (RCID):
Protection protector installed at the power supply incoming end of the electrical device: overcurrent protection device installed as required by the manufacturer of power supply detector (SPI); grounding electrode (grounding resistor) of the electrical device - grounding electrode (grounding resistor) of the power supply system. Figure C 1
Switch protector (SFD) is installed on the load side of the residual current protector (RCD) 1.2
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