HOME   Cart(0)   Quotation   About-Us Tax PDFs Standard-List Powered by Google www.ChineseStandard.net Database: 189759 (5 Jan 2025)

GB/T 13955-2017 English PDF (GB 13955-2005, GB 13955-1992)

GB/T 13955-2017_English: PDF (GB/T13955-2017)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 13955-2017English145 Add to Cart 0--9 seconds. Auto-delivery Installation and operation of residual current operated protective devices Valid GB/T 13955-2017
GB 13955-2005English70 Add to Cart 0--9 seconds. Auto-delivery [GB/T 13955-2005] Installation and operation of residual current operated protective devices Obsolete GB 13955-2005
GB 13955-1992English479 Add to Cart 4 days [Need to translate] Instsllating and operation of residual current operated protective devices Obsolete GB 13955-1992


BASIC DATA
Standard ID GB/T 13955-2017 (GB/T13955-2017)
Description (Translated English) Installation and operation of residual current operated protective devices
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard K09
Classification of International Standard 29.120.50
Word Count Estimation 22,233
Date of Issue 2017-12-29
Date of Implementation 2018-07-01
Older Standard (superseded by this standard) GB/T 13955-2005
Drafting Organization State Grid Corporation of China Information and Communication Industry Group Beijing Zhonghua Puhua Information Technology Co., Ltd.
Administrative Organization China Electricity Council
Regulation (derived from) National Standards Bulletin 2017 No. 32
Proposing organization China Electricity Council
Issuing agency(ies) People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration

BASIC DATA
Standard ID GB 13955-2005 (GB13955-2005)
Description (Translated English) [GB/T 13955-2005] Installation and operation of residual current operated protective devices
Sector / Industry National Standard
Classification of Chinese Standard K09
Classification of International Standard 29.120.50
Word Count Estimation 23,289
Date of Issue 2005-02-06
Date of Implementation 2005-12-01
Older Standard (superseded by this standard) GB 13955-1992
Quoted Standard GB 6829; GB 9706.1; GB 10963
Drafting Organization Beijing Power Supply Bureau
Administrative Organization National Society of Electrical Engineering
Regulation (derived from) Announcement of Newly Approved National Standards No. 6, 2005 (No. 80 overall)
Proposing organization China Electricity Council
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People Republic of China, China National Standardization Administration Committee
Summary This Chinese standard specifies the proper selection, installation, use residual current operated protective device and its operation and management of the relevant requirements. This standard applies to the working voltage of AC 50Hz or 60Hz, rated voltage not exceeding 230/400 (230/380) V power supply neutral point directly grounded power system.

BASIC DATA
Standard ID GB 13955-1992 (GB13955-1992)
Description (Translated English) Instsllating and operation of residual current operated protective devices
Sector / Industry National Standard
Classification of Chinese Standard K09
Classification of International Standard 29.120.50
Word Count Estimation 12,171
Date of Issue 1992/12/19
Date of Implementation 1993/5/1
Regulation (derived from) Announcement of Newly Approved National Standards 2005 No. (No. 80 overall) 6
Summary This Standard specifies the proper selection, installation, use the relevant requirements of the current action leakage protection device and its operating management. This Standard is applicable to an operating voltage of AC 50Hz, 220/380V power supply neutral grounding system for electricity. Leakage protection within the meaning of this standard refers to leakage protection device when the circuit leakage current exceeds the allowable value, can automatically cut off the power supply or alarm, including various types of leakage circuit breakers, with leakage protection plugs (seat), leakage protection relays, leakage fire alarm, with the combination of electrical leakage protection and so on.


GB/T 13955-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 29.120.50 K 09 Replacing GB/T 13955-2005 Installation and operation of residual current operated protective devices ISSUED ON. DECEMBER 29, 2017 IMPLEMENTED ON. JULY 01, 2018 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China; 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 ... 8 4 Application of RCDs ... 13 4.1 Protection against direct contact electric shock accidents ... 13 4.2 Protection against indirect contact electric shock accidents ... 13 4.3 Selective protection ... 14 4.4 Equipment and locations where RCD shall be installed ... 14 4.5 Cases where RCD may not be installed ... 15 5 Selection of RCDs ... 16 5.1 Technical conditions of RCDs ... 16 5.2 Technical parameters of RCDs ... 16 5.3 Selection of RCD according to the power supply mode of electrical equipment ... 16 5.4 Selection of rated operating current of RCDs ... 16 5.5 Adopting selective protection method ... 17 5.6 Selection of RCD according to the working environment of electrical equipment ... 17 5.7 Selection of RCD operation parameters ... 18 5.8 Selection of RCD for special loads and locations ... 18 6 Installation of RCDs ... 19 6.1 Installation requirements for RCDs ... 19 6.2 Requirements of RCDs for the grid ... 20 6.3 Construction requirements for installation of RCDs ... 20 7 Operation and management of RCD ... 24 Annex A (normative) System earth type ... 26 Annex B (normative) Rated value of RCD ... 30 Annex C (informative) Diagrams of selective protection reference modes ... 34 Bibliography ... 37 Foreword This Standard is drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 13955-2005 “Installation and operation of residual current operated protective devices”. Compared with GB/T 13955-2005, except for editorial modifications, the main technical changes are as follows. - ADD GB/T 14048.1, GB/T 20044, GB/T 22387, GB/T 22794 and GB/T 28527 (see Clause 2 of this Standard); - DELETE GB 14287 (see Clause 2 of 2005 edition); - MODIFY the definitions of the terms “direct contact”, “indirect contact”, “residual current” and “assemble type residual operated protection devices” (see 3.1, 3.2, 3.3, 3.29 of this Standard, 3.1, 3.2, 3.3, 3.24 of 2005 edition); - ADD the terms and definitions of “group of loads”, “selective protection”, “main protection”, “middle protection” and “end protection” (see 3.12, 3.13, 3.14, 3.15, 3.16 of this Standard); - DELETE the term and definition of “residual current operated electrical fire monitoring system” (see 3.26 of 2005 edition); - CANCEL the restrictions on “power supply and consumption system of which the power neutral point is directly earthed” and the restrictions on rated frequency (see Clause 1 of this Standard, Clause 1 of 2005 edition); - DELETE the contents of “alarm RCD” and “residual current operated electrical fire monitoring system” (see introduction); - ADD “5.4 c) when used in the cases where the power line carrier has an influence on the line leakage current, the influencing factors of the non- power frequency leakage current shall be considered.” (see 5.4); - ADD the requirements for the installation of RCDs in rural areas, agricultural sites (see 4.4.1 of this Standard, 4.5.1 of 2005 edition); - DELETE the “concentratedly installed electric energy meter box in rural areas” (see 4.4.2 of this Standard, 4.5.2 of 2005 edition); - DELETE the TN-C earth type in Table 1 (see Table 1 of this Standard, Table 1 of the 2015 edition); - For the relevant requirements for the maintenance and operation, fault finding of RCDs, propose specific operational and management plans, and Installation and operation of residual current operated protective devices 1 Scope This Standard specifies the relevant requirements for correct selection, installation and application of residual current operated protective devices (RCD) and their operational management. This Standard applies to AC power supply systems with a rated voltage not exceeding 400 V. This Standard does not apply to the protection against electric shock accidents, electrical equipment damages or electrical fire accidents between phases or between phases and N lines. 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/Z 6829 General requirements for residual current operated protective devices GB/T 10963.1 Electrical accessories - Circuit-breakers for overcurrent protection for household and similar installation - Part 1. Circuit-breakers for a.c. operation (GB/T 10963.1-2005, IEC 60898.1.2002, IDT) GB/T 14048.1 Low-voltage switchgear and controlgear - Part 1. General rules (GB/T 14048.1-2012, IEC 60947-1.2011, MOD) GB/T 14048.2 Low-voltage switchgear and controlgear - Part 2. Circuit- breakers (GB/T 14048.2-2008, IEC 60947-2.2006, IDT) GB 14050-2008 Types and safety technical requirements of system earthing GB/T 16916 (all parts) Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCB) (GB/T 16916.1-2014, IEC 61008-11.2012, MOD; GB/T 16916.21-2008, IEC 61008- protection) or protection of a single electrical equipment (three-level protection). 3.17 residual current operated circuit-breaker without integral overcurrent protection (RCCB) A residual current operated circuit-breaker that cannot perform overload and/or short circuit protection functions. 3.18 residual current operated circuit-breaker with integral overcurrent protection (RCBO) A residual current operated circuit-breaker that can perform overload and/or short circuit protection functions. 3.19 RCD’s functionally independent of line voltage An RCD of which the testing, judgment and breaking functions are independent of power supply voltage. 3.20 RCD’s functionally dependent on line voltage An RCD of which the testing, judgment and breaking functions are related to power supply voltage. 3.21 break time of RCD Time elapsed from the moment when the residual operating current is suddenly applied to the moment when all the pole arcs are extinguished. 3.22 limit non-actuating time The maximum delay time when the RCD does not operate after a residual current value greater than the residual non-operating current is applied to the RCD. 3.23 alarms, or communication devices. 3.30 portable move type residual current operated protective devices An RCD that is portable. 4 Application of RCDs 4.1 Protection against direct contact electric shock accidents In the protection against direct contact electric shock accidents, the RCD is only used as a supplementary protection measure of the basic protection measure of direct contact electric shock accidents (excluding the protection against direct contact electric shock accidents formed between phases, phases and N lines). For the protection against direct contact electric shock accidents, a time-delay RCD shall be used with a rated residual operating current not exceeding 30 mA. 4.2 Protection against indirect contact electric shock accidents 4.2.1 General requirements The main measure for the protection against direct contact electric shock accidents is to use the protection method of automatically cutting off the power supply when an earth fault occurs due to insulation damage of electrical equipment, to prevent the exposed accessible conductors of the electrical equipment from having harmful effects due to continuously carrying dangerous voltage or electrical equipment damage. When the line has an earth fault due to insulation damage, and the earth fault current value is less than the operating current value of the overcurrent protection device, the RCD shall be installed. When the RCD is used for indirect contact electric shock accidents, it shall be properly matched with the electrical network system earth type (the type of electrical network earthing system is in accordance with the specifications of 4.1, 4.2 and 4.3 of GB 14050-2008, see Annex A). 4.2.2 Protection requirements for TN systems 4.2.2.1 For TN-C systems using RCD, the exposed accessible conductors of electrical equipment shall be earthed independently to form a local TT system according to the specific conditions of electric shock protection measures. 4.2.2.2 In TN systems, the TN-C system shall be retrofitted to TN-C-S, TN-S shall be considered. a) It shall fully consider the earth leakage current value of electrical lines and equipment. If necessary, it may obtain the earth leakage current of the protected lines or equipment through actual measurement; b) When the earth leakage current value changes due to seasonal and weather changes, RCD of which the operating current is adjustable shall be considered; c) When it is used in locations where the application of a power line carrier affects line leakage current, the factors affecting the non-power frequency leakage current shall be considered. 5.5 Adopting selective protection method When the selective protection method is adopted, the series test simulation selective operation test shall be carried out by using the test device before installation, ensuring the coordination of the operation characteristics. 5.6 Selection of RCD according to the working environment of electrical equipment The selection of RCD shall be based on the working environment of the following electrical equipment. a) RCD shall be compatible with the environmental conditions of use; b) For the electrical equipment in the area where the power supply voltage deviation is within the standard range, the RCD with the operation function related to the power supply voltage shall be selected. Otherwise, the RCD with the operation function independent of the power supply voltage shall be selected. c) Under special use conditions (“standard working conditions for use” exceeds or specified by the national standards of RCD related products, such as. GB/Z 6829, GB/T 14048.2, GB/T 16916, GB/T 16917), the RCD with appropriate environmental indicators shall be selected, and appropriate measures shall be taken to ensure that the RCD is working properly; d) For household appliance protection, if necessary, the RCD that satisfies overvoltage protection may be selected; e) For RCD installed in harsh environments such as flammable, explosive, humid or corrosive gases, the RCD with special protective conditions shall be selected according to relevant standards, or corresponding protective water fountains, water parks, bathrooms, greenhouse farming and nursery, and aquatic product processing areas, it shall select the RCD with a rated residual operating current of 10 mA and without time delay. When working on metal objects, operating hand-held power tools or using lights with unsafe voltage, it shall select the RCD with a rated residual operating current of 10 mA and without time delay. For electrical equipment connected to outdoor overhead lines, and when an overvoltage may occur, it may take special protection measures (for example. using overvoltage protection devices such as surge protectors), and select the RCD with enhanced tripping resistance. In general, type AC RCDs are used. For electrical equipment with a large number of electronic components, when the power supply unit fault contains a pulsating DC component, it shall use type A RCDs. For electrical equipment of which the load has inverter, three-phase AC rectifier, inverse converter, UPS device and special medical equipment (for example. X-ray equipment, CT), etc. that produce smooth DC residual current, special type B RCDs that can operate with pulsating DC residual current and smooth DC residual current. For arc welding transformers, it shall use special anti-shock protection devices. For RCDs at all levels, it can optionally select RCDs with information display (such as operating time, outage time, operation parameters, residual current value), measurement, storage, or communication functions. 6 Installation of RCDs 6.1 Installation requirements for RCDs The installation requirements for RCDs are as follows. a) The installation of RCDs shall meet the requirements of GB/Z 6829, GB/T 14048.1, GB/T 16916, GB/T 16917, GB/T 20044, GB/ 28527, GB/T 22794, GB/T 22387 and other relevant standards; b) The installation of RCDs shall fully consider the power supply mode, power supply voltage, system earthing method and protection mode; c) The type, rated voltage, rated current, short-circuit breaking capacity, rated residual operating current and break time of RCDs shall meet the requirements of the protected line and electrical equipment; d) RCDs shall be properly wired in different system earthing methods. The correct wiring methods in single-phase, three-phase three-line, three- b) When installing the residual current circuit-breaker, there shall be sufficient arcing distance in the direction of arc discharge as required. c) For assemble type RCDs, the connection of the control circuit shall use copper conductors with a cross-sectional area of not less than 1.5 mm2. d) When installing the RCD, the N line and PE line shall be strictly distinguished. The N line of three-pole four-line or four-pole four-line RCDs shall be connected to the protective device. The N line passes through the RCD shall not be used as a PE line, and shall not be earthed repeatedly or connected to the exposed accessible conductor of the device. The PE line shall not be connected to the RCD. e) After the RCD is installed, the earthing protection measures for the original lines and equipment shall be checked and adjusted in accordance with the requirements of 6.1d), 6.2b) and 6.3d). f) Before the RCD is put into operation, it shall operate the test button, check the working characteristics of the RCD and confirm that it can operate normally. g) Inspection items after RCD installation. 1) Test once using the test button, it shall operate correctly; 2) Switch on and switch off the RCD with rated load current once, it shall operate reliably. h) The installation of RCDs shall be carried out by professionals who have passed the technical assessment. i) The property owner shall establish and preserve the installation and test record of RCDs. See Table 1 for the RCD wiring method. 7 Operation and management of RCD After the RCD is put into operation, the operation-maintenance manager shall establish a corresponding management system for residual current operated protective devices and establish an operation record. After the RCD is put into operation, the test button shall be operated periodically to check whether the operation characteristics are normal. The number of tests shall be increased during the lightning strike period and the peak period of power consumption. For hand-held power tools, portable electrical equipment and RCDs for discontinuous use, the test shall be carried out before each use. In order to test the operation characteristics of the residual current device and their changes during operation, the operation manager shall equip a dedicated test device and shall carry out the operation characteristic test periodically. The operation characteristics test items. a) test the residual operating current value; b) test the break time; c) test the limit non-actuating time. Electronic RCD, based on the effective working life of electronic components, has a working life of 6 years. If the specified working life is exceeded, a comprehensive inspection shall be carried out. Based on the inspection results, it may be decided whether or not to continue operation. Before the RCD that has been shut down for various reasons is used again, the operation characteristic test shall be carried out to check whether the operation of the device is normal. When the RCD is subjected to the operation characteristic test, it shall use the special test device that has been tested and qualified by the relevant national departments, and performed by professionals. It is strictly forbidden to use the phase line to directly short-circuit to earth or use animal as a test object. After the RCD operates, trial current delivery is allowed once when the cause of the operation is not found put after inspection. If it operates again, the cause and fault shall be found out, continuous forced current delivery is not allowed. If necessary, carry out an operation characteristic test. After checking to confirm Annex B (normative) Rated value of RCD B.1 Rated frequency (f) The rated frequency is 50 Hz. B.2 Rated voltage (Un) The rated voltage is 230 V or 230 V/400 V or 400 V. B.3 Rated voltage of auxiliary power supply (Usn) The priority values of the rated voltage of auxiliary power supply are. a) DC. 12 V, 24 V, 48 V, 60 V, 110 V, 220 V. b) AC. 12 V, 24 V, 36 V, 48 V, 220 V, 400 (380) V. B.4 Rated current (In) The rated current values are. 6 A, 10 A, 16 A, 20 A, 25 A, 32 A, 40 A, 50 A, 63 A, 80 A, 100 A, 125 A, 160 A, 200 A, 250 A, 315 A, 400 A, 500 A, 630 A, 700 A, 800 A. B.5 Rated residual operating current (IΔn) The rated residual operating current values are. 0.006 A, 0.01 A, 0.03 A, 0.05 A, 0.1 A, 0.2 A, 0.3 A, 0.5 A, 0.8 A, 1 A, 3 A, 5 A, 10 A, 20 A, 30 A. B.6 Rated residual non-operating current (IΔn0) The priority value of the rated residual non-operating current is 0.5IΔn. If other values are used, it shall be greater than 0.5IΔn. NOTE. The value of 0.5IΔn refers only to power frequency AC residual current. B.7 Break time of RCD The maximum break time of RCDs for direct contact supplementary protection is shown in Table B.1. The maximum break time of RCDs for indirect contact protection is shown in ......


GB 13955-2005 GB ICS 29.120.50 K 09 NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA Replacing GB 13955-1992 Installation and Operation of Residual Current Operated Protective Devices ISSUED ON. FEBRUARY 6, 2005 IMPLEMENTED ON. DECEMBER 1, 2005 Jointly issued by. General Administration of Quality Supervision and Inspection and Quarantine (AQSIQ) of the People's Republic of China; Standardization Administration (SAC) of the People’s Republic of China. Table of Contents Foreword ... 3  Introduction ... 5  1 Scope ... 6  2 Normative References ... 6  3 Terms and Definitions ... 7  4 Application of Residual Current Protective Device ... 11  5 Selection of Residual Current Protective Device ... 14  6 Installation of Residual Current Protective Device ... 17  7 Operation and Management of Residual Current Protective Device ... 20  Annex A ... 22  Annex B ... 26  Annex C... 30  Foreword All technical contents in this standard are compulsory. This standard is the revision of Installation and Operation of Residual Current Operated Protective Devices (GB 13955-1992). Compared with GB 13955-1992, the main changes of this standard are as follows. 1. The name of the standard is revised to Installation and Operation of Residual Current Operated Protective Devices, so that this standard is consistent with the name of the same-kind of international standard as well as the relevant national standard, such as General Requirements for Residual Current Operated Protective Devices (GB 6829), Residual Current Operated Circuit-breakers without Integral Overcurrent Protection for Household and Similar Uses(RCCB) (GB 16916), Residual Current Operated Circuit-breakers with Integral Overcurrent Protection for Household and Similar Uses(RCBO) (GB 16917). 1. The "protector" in the standard is revised to "device". The scope of "device" refers to the series equipment with residual current operated protection function to make the name of this standard to be more-exact and meet the requirements of standardization. 2. The application scope of RCD is revised to emphasize that the protective device has protective function only "when the residual current produced on earth fault by electric conductor in circuit is greater than the specified value". And it has no protective function for electric shock and electric fire caused by phase fault, phase line and neutral (N) line fault. 3. It adds relevant contents to normative references, terms and definitions. 4. It emphasizes the correct connection mode of RCD in different system earth types and the problems in need of attention. It also emphasizes that the RCD can't be correctly installed and operated until the TN-C system is transformed into TN-C-S or TN-S system. 5. For the application of RCD, the selective protection mode shall meet the following requirements to avoid electric fire. 1) Selective protection is adopted for enterprises, institutions and residential building as well as low-voltage distribution line; 2) The selective protection mode is emphasized for the protection electric shock accident, giving priority to end protection; 3) It adds electrical equipment for production and electrical devices installed outdoors at where the RCD must be installed; 4) The RCD of low-voltage distribution line shall be according to the specific circumstances, so as to adopt 2-levels protection or 3-levels protection. 6. It emphasizes the protection function of RCD in avoiding electric fire caused by earth fault and installing residual current operated fire monitoring device inside buildings. And it specifies the determination method of its operating parameters. 7. In order to understand the mode of selective protection and the installation of electric fire monitor system, Annex C in this standard gives reference pattern figure for selective protection mode. 8. This standard modifies the allowable value for the earth resistance of electrical equipment independent. And it specifies that it shall regard the possible dangerous voltage as the limit. 9. It adds suggestions on the service life (generally 6 years) of electronic RCD. 10. It emphasizes that the operation and management unit shall configure special test equipment for regular characteristic test, after installing residual current protective device. 11. It emphasizes that animal shall be prohibited from the trial. The Annex A and Annex B of this standard are normative. The Annex C of this standard is informative. This standard was proposed by China Electricity Council. This standard is under the jurisdiction of Chinese Society of Electrical Engineering. Drafting organizations of this standard. Beijing Power Supply Bureau, and Shanghai Electrical Apparatus Research Institute. Chief drafting staffs of this standard. Lv Qian, Chen Shufang, Zhang Lei, and Zhou Jigang. This standard shall replace GB 13955-1992, from the implementation date. Introduction To install RCD in low-voltage distribution system is one of the effective measures for avoiding direct contact and indirect contact electric shock accident. It is also one of the technical measures for preventing electric fire and electrical equipment damage accident caused by earth fault in electric circuit or electrical equipment. However, after installing RCD, it shall still give priority to prevention and meanwhile take other technical measures for preventing electric shock accident and electrical equipment damage accident. The RCD in this standard refers to the protective device which is able to disconnect power supply or alarm automatically when the residual current produced on earth fault by live conductor in circuit in which the value is greater than the specified value. It includes various circuit-breakers with residual current protection function, portable move type residual current protective device and residual current operated electric fire monitor system, residual current relay and its combination electrical devices. Installation and Operation of Residual Current Operated Protective Devices 1 Scope This standard specifies the relevant requirements for correctly selecting, installing, and using residual current operated protective devices (hereinafter referred as residual current protective device, RCD for short), and its operation and management. This standard is applicable to power supply and consumption system of power supply neutral-point direct grounding – the operating voltage is AC 50 Hz or 60 Hz, the rated voltage is less than or equal to 230/400 (220/ 380)V. This standard is not applicable to protection of phase-phase or phase-N line electric shock accident, electrical equipment damage, or electric fire accident. 2 Normative References The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent modification to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to these specifications. GB 6829 General Requirements for Residual Current Operated Protective Devices GB 9706.1 Medical Electrical Equipment — Part 1. General Requirements for Safety (GB 9706.1—1995, idt IEC60601-1.1988) GB 10963 Circuit-breakers for Overcurrent Protection for Household and Similar Installation (GB 10963—1999, idt IEC 60898.1995) GB 14048.2 Low-voltage Switchgear and Controlgear — Low-voltage Circuit Breakers (GB 14048.2—2001, idt IEC 60947-2.1997) GB 14050 Types and Safety Technical Requirements of System Earthing GB 14287 Residual Current Operated Alarm Devices for Fire Prevention GB 16916 (All parts) Residual Current Operated Circuit-breakers without Integral Overcurrent Protection for Household and Similar Uses (RCCB) (GB 16916.1—2003, idt IEC 61008.1.1996; GB 16916.21—1997, idt IEC61008.2-1.1990; GB 16916.22 1997, idt IEC 61008.2-2.1990) GB 16917 (All parts) Residual Current Operated Circuit-breakers with Integral Overcurrent Protection for Household and Similar Uses (RCBO) (GB 16917.1—2003, idt IEC 61009-1.1996; GB 16917.21—1997, idt IEC 61009-2-1.1991; GB 16917.22—1997, idt IEC 61009-2-2. 1991) 3 Terms and Definitions The following terms and definitions are applicable to this standard. 3.1 Direct contact The contact BETWEEN human body or livestock AND live conductor. 3.2 Indirect contact The contact BETWEEN human body or livestock AND exposed accessible conductor of live electrical equipment that is converted under fault conditions. 3.3 Residual current (IΔ) The vector sum (expressed with effecti... ......

Similar standards: GB/T 18891-2024  GB/T 34924-2024  
Similar PDFs (Auto-delivered in 9 seconds): GB/T 13955-2017  GB 13955-2005  GB/T 13869-2017  GB 14050-2008