Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed 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; in addition to a number of editorial changes，the following technical changes have been made with respect to GB/T 13955-2005:
——GB/T 14048.1, GB/T 20044, GB/T 22387, GB/T 22794 and GB/T 28527 (see Chapter 2) are added;
——GB 14287 is deleted (see Chapter 2 of 2005 edition);
——The definitions of terms such as "direct contact", "indirect contact", "residual current" and "assemble type residual operated protective devices" are modified (see 3.1, 3.2, 3.3 and 3.29; 3.1, 3.2, 3.3 and 3.24 of 2005 edition);
——The terms and definitions of "group of loads", "selective protection", "main protection", "middle protection" and "end protection" are added (see 3.12, 3.13, 3.14, 3.15 and 3.16);
——Term and definition of "residual current operated electrical fire monitor system" is deleted (see 3.26 of 2005 edition);
——Restrictions to "power supply and consumption system for neutral point direct earthing of power supply" and to rated frequency are cancelled (see Chapter 1; Chapter 1 of 2005 edition);
——The relevant contents of "alarm RCD" and "residual current operated electrical fire monitor system" are deleted (see introduction);
——"5.4 c) The influence of non-power frequency leakage current shall be considered in occasions where the application of power line carrier has an influence on line leakage current." is added (see 5.4);
——The requirements of RCD installation in agricultural power utilization place in the rural area are added (see 4.4.1; 4.5.1 of 2005 edition);
——"Energy meter boxes are intensively installed in the rural area" is deleted (see 4.4.2; 4.5.2 of 2005 edition);
——TN-C earthing type in Table 1 is deleted (see Table 1; Table 1 of 2015 edition);
——Specific operation and management plans are proposed according to the relevant requirements for maintenance, operation and fault shooting of RCD; the relevant compulsory technical requirements in original standard are revised;
——Button test and on-load opening/closing after installation is changed as one time (see 6.3; 6.3.7 of 2005 edition).
This standard was proposed by and is under the jurisdiction of China Electricity Council.
The previous edition of the standard replaced by this standard is:
——GB/T 13955-2005.
Introduction
To install residual current operated protective devices in low-voltage distribution system is one of the effective measures for avoiding electric shock accident caused by direct and indirect contact, and it is also one of the technical measures for avoiding electrical fire and electrical equipment damage accident caused by earth fault of electrical circuit or electrical equipment. After residual current operated protective device is installed, the prevention shall come first, in addition, other technical measures for avoiding electric shock accident, electrical fire and electrical equipment damage accident shall also be taken.
The residual current operated protective device in this standard refers to the protective device being able to automatically power off when the residual current generated by earth fault of live conductor in circuit is greater than the specified value, including various circuit-breakers with residual current protection function, portable move type residual current operated protective devices and residual current relays and the composite apparatus.
Installation and Operation of Residual Current Operated Protective Devices
1 Scope
This standard specifies the relevant requirements for correct selection, installation and use of Residual Current operated protective Devices (hereinafter referred to as RCD) as well as its operation and management.
This standard is applicable to AC power supply and consumption system with rated voltage not greater than 400V.
This standard is not applicable to protection against electric shock accident happened between phases or between phase and N line, electrical equipment damage or electrical fire accident.
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 normative 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 61008-2-1:1990, IDT; GB/T 16916.22-2008, IEC 61008-2-2:1990, IDT)
GB/T 16917 (All parts) Residual Current Operated Circuit-breakers with Integral Overcurrent Protection for Household and Similar Uses (RCCB) (GB/T 16917.1-2014, IEC 61009-1:2012, MOD; GB/T 16917.21-2008, IEC 61009-2-1:1991, IDT; GB/T 16917.22-2008, IEC 61009-2-2:1991, IDT)
GB/T 20044 Electrical Accessories - Portable Residual Current Devices without Integral Overcurrent Protection for Household and Similar Use (PRCD) (GB/T 20044-2012, IEC 61540:1999, MOD)
GB/T 22387 Residual Current Operated Relay
GB/T 22794 Type B Residual Current Operated Circuit-breakers with and without Integral Overcurrent Protection for Household and Similar Uses (Type B RCCBs and Type B RCBOs) (GB/T 22794-2008, IEC 62423:2007, IDT)
GB/T 28527 Residual Current Devices with or without Overcurrent Protection for Socket-outlets for Household and Similar Uses (SRCD) (GB/T 28527-2012, IEC 62640:2011, MOD)
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
direct contact
contact of human or animal with live conductor
3.2
indirect contact
contact of human or animal with exposed conductor of equipment which becomes live under fault condition
3.3
residual current
I∆
effective value of current vector sum passing through RCD main circuit
3.4
residual operating current
residual current value which causes RCD to operate under specified conditions
3.5
rated residual operating current
IΔn
residual operating current value of RCD specified by the manufacturer, at which RCD shall operate under specified conditions
3.6
residual non-operating current
residual current value which doesn't cause RCD to operate under specified conditions in case of less than or equal to this current
3.7
rated residual non-operating current
IΔn0
residual non-operating current value of RCD specified by the manufacturer, at which RCD will not operate under specified conditions
3.8
earth fault current
current flowing into the earth due to insulation fault
3.9
earth leakage current
current flowing into the earth from live component of equipment without insulation fault
3.10
residual current operated circuit-breaker
mechanical switching device used for connecting, carrying and disconnecting the current under normal operating conditions and disconnecting the contact when the residual current reaches the specified value under specified conditions
3.11
residual current operated relay
electric apparatus which can send out operating command when the residual current reaches the specified value under specified conditions
3.12
group of loads
set of all power loads sharing the same branch point
3.13
selective protection
RCD is respectively installed at power supply end, head end of group of loads and load end to constitute two-level or above series connection protective system, and the rated current value and residual current operated value of main circuit of RCD at all levels cooperate with the operating time to realize selective protection
3.14
main protection
Level 1 RCD installed at low-voltage side of distribution area, also known as Level 1 protection
3.15
middle protection
RCD installed at low-voltage main line or branch line between main protection and household protection, also known as Level 2 protection; middle protection may be classified into "three-phase middle protection" and "single-phase middle protection" according to different installation places and wiring modes
3.16
end protection
it refers to the power distribution protection of residential buildings (or household protection) or protection of single electric equipment (Level 3 protection)
3.17
residual current operated circuit-breaker without integral overcurrent protection
residual current operated circuit-breakers without overload and/or short-circuit protection functions
3.18
residual current operated circuit-breaker with integral overcurrent protection
residual current operated circuit-breakers with overload and/or short-circuit protection functions
3.19
RCD's functionally independent of line voltage
RCD, of which, the detection, judgment and disconnection functions are independent of line voltage
3.20
RCD's functionally dependent on line voltage
RCD, of which, the detection, judgment and disconnection functions are dependent on line voltage
3.21
break time of RCD
the period from the moment of suddenly applying residual operating current to the moment of all electrode arcs going off
3.22
limit non-actuating time
the maximum delay time of applying a residual current value greater than residual non-operating current on RCD but not causing RCD to operate
3.23
time-delay RCD
RCD specially designed for corresponding to a given residual current value and reaching a predetermined limit non-actuating time
3.24
type AC residual current device
RCD which can ensure to release the suddenly applied or slowly rising residual sinusoidal alternating current
Foreword i
Introduction iii
1 Scope
2 Normative References
3 Terms and Definitions
4 Application of RCD
4.1 Protection against Direct Contact Electric Shock Accident
4.2 Protection against Indirect Contact Electric Shock Accident
4.3 Selective Protection
4.4 Equipment and Place in Which RCD Shall be Installed
4.5 Situation Where RCD May not be Installed
5 Selection of RCD
5.1 Technical Conditions of RCD
5.2 Technical Parameters of RCD
5.3 Selection of RCD According to Power Supply Mode of Electrical Equipment
5.4 Selection of Rated Operating Current of RCD
5.5 Adoption of Selective Protection Mode
5.6 Selection of RCD According to Operating Environment Conditions of Electrical Equipment
5.7 Selection of Operating Parameters of RCD
5.8 Selection of RCD with Special Load and in Special Places
6 Installation of RCD
6.1 Installation Requirements of RCD
6.2 Requirements of RCD for Power Grid
6.3 Construction Requirements of RCD Installation
7 Operation and Management of RCD
Annex A (Normative) System Earthing Types
Annex B (Normative) Rated Value of RCD
Annex C (Informative) Reference of Selective Protection Mode
Bibliography
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This standard is developed 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; in addition to a number of editorial changes，the following technical changes have been made with respect to GB/T 13955-2005:
——GB/T 14048.1, GB/T 20044, GB/T 22387, GB/T 22794 and GB/T 28527 (see Chapter 2) are added;
——GB 14287 is deleted (see Chapter 2 of 2005 edition);
——The definitions of terms such as "direct contact", "indirect contact", "residual current" and "assemble type residual operated protective devices" are modified (see 3.1, 3.2, 3.3 and 3.29; 3.1, 3.2, 3.3 and 3.24 of 2005 edition);
——The terms and definitions of "group of loads", "selective protection", "main protection", "middle protection" and "end protection" are added (see 3.12, 3.13, 3.14, 3.15 and 3.16);
——Term and definition of "residual current operated electrical fire monitor system" is deleted (see 3.26 of 2005 edition);
——Restrictions to "power supply and consumption system for neutral point direct earthing of power supply" and to rated frequency are cancelled (see Chapter 1; Chapter 1 of 2005 edition);
——The relevant contents of "alarm RCD" and "residual current operated electrical fire monitor system" are deleted (see introduction);
——"5.4 c) The influence of non-power frequency leakage current shall be considered in occasions where the application of power line carrier has an influence on line leakage current." is added (see 5.4);
——The requirements of RCD installation in agricultural power utilization place in the rural area are added (see 4.4.1; 4.5.1 of 2005 edition);
——"Energy meter boxes are intensively installed in the rural area" is deleted (see 4.4.2; 4.5.2 of 2005 edition);
——TN-C earthing type in Table 1 is deleted (see Table 1; Table 1 of 2015 edition);
——Specific operation and management plans are proposed according to the relevant requirements for maintenance, operation and fault shooting of RCD; the relevant compulsory technical requirements in original standard are revised;
——Button test and on-load opening/closing after installation is changed as one time (see 6.3; 6.3.7 of 2005 edition).
This standard was proposed by and is under the jurisdiction of China Electricity Council.
The previous edition of the standard replaced by this standard is:
——GB/T 13955-2005.
Introduction
To install residual current operated protective devices in low-voltage distribution system is one of the effective measures for avoiding electric shock accident caused by direct and indirect contact, and it is also one of the technical measures for avoiding electrical fire and electrical equipment damage accident caused by earth fault of electrical circuit or electrical equipment. After residual current operated protective device is installed, the prevention shall come first, in addition, other technical measures for avoiding electric shock accident, electrical fire and electrical equipment damage accident shall also be taken.
The residual current operated protective device in this standard refers to the protective device being able to automatically power off when the residual current generated by earth fault of live conductor in circuit is greater than the specified value, including various circuit-breakers with residual current protection function, portable move type residual current operated protective devices and residual current relays and the composite apparatus.
Installation and Operation of Residual Current Operated Protective Devices
1 Scope
This standard specifies the relevant requirements for correct selection, installation and use of Residual Current operated protective Devices (hereinafter referred to as RCD) as well as its operation and management.
This standard is applicable to AC power supply and consumption system with rated voltage not greater than 400V.
This standard is not applicable to protection against electric shock accident happened between phases or between phase and N line, electrical equipment damage or electrical fire accident.
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 normative 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 61008-2-1:1990, IDT; GB/T 16916.22-2008, IEC 61008-2-2:1990, IDT)
GB/T 16917 (All parts) Residual Current Operated Circuit-breakers with Integral Overcurrent Protection for Household and Similar Uses (RCCB) (GB/T 16917.1-2014, IEC 61009-1:2012, MOD; GB/T 16917.21-2008, IEC 61009-2-1:1991, IDT; GB/T 16917.22-2008, IEC 61009-2-2:1991, IDT)
GB/T 20044 Electrical Accessories - Portable Residual Current Devices without Integral Overcurrent Protection for Household and Similar Use (PRCD) (GB/T 20044-2012, IEC 61540:1999, MOD)
GB/T 22387 Residual Current Operated Relay
GB/T 22794 Type B Residual Current Operated Circuit-breakers with and without Integral Overcurrent Protection for Household and Similar Uses (Type B RCCBs and Type B RCBOs) (GB/T 22794-2008, IEC 62423:2007, IDT)
GB/T 28527 Residual Current Devices with or without Overcurrent Protection for Socket-outlets for Household and Similar Uses (SRCD) (GB/T 28527-2012, IEC 62640:2011, MOD)
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
3.1
direct contact
contact of human or animal with live conductor
3.2
indirect contact
contact of human or animal with exposed conductor of equipment which becomes live under fault condition
3.3
residual current
I∆
effective value of current vector sum passing through RCD main circuit
3.4
residual operating current
residual current value which causes RCD to operate under specified conditions
3.5
rated residual operating current
IΔn
residual operating current value of RCD specified by the manufacturer, at which RCD shall operate under specified conditions
3.6
residual non-operating current
residual current value which doesn't cause RCD to operate under specified conditions in case of less than or equal to this current
3.7
rated residual non-operating current
IΔn0
residual non-operating current value of RCD specified by the manufacturer, at which RCD will not operate under specified conditions
3.8
earth fault current
current flowing into the earth due to insulation fault
3.9
earth leakage current
current flowing into the earth from live component of equipment without insulation fault
3.10
residual current operated circuit-breaker
mechanical switching device used for connecting, carrying and disconnecting the current under normal operating conditions and disconnecting the contact when the residual current reaches the specified value under specified conditions
3.11
residual current operated relay
electric apparatus which can send out operating command when the residual current reaches the specified value under specified conditions
3.12
group of loads
set of all power loads sharing the same branch point
3.13
selective protection
RCD is respectively installed at power supply end, head end of group of loads and load end to constitute two-level or above series connection protective system, and the rated current value and residual current operated value of main circuit of RCD at all levels cooperate with the operating time to realize selective protection
3.14
main protection
Level 1 RCD installed at low-voltage side of distribution area, also known as Level 1 protection
3.15
middle protection
RCD installed at low-voltage main line or branch line between main protection and household protection, also known as Level 2 protection; middle protection may be classified into "three-phase middle protection" and "single-phase middle protection" according to different installation places and wiring modes
3.16
end protection
it refers to the power distribution protection of residential buildings (or household protection) or protection of single electric equipment (Level 3 protection)
3.17
residual current operated circuit-breaker without integral overcurrent protection
residual current operated circuit-breakers without overload and/or short-circuit protection functions
3.18
residual current operated circuit-breaker with integral overcurrent protection
residual current operated circuit-breakers with overload and/or short-circuit protection functions
3.19
RCD's functionally independent of line voltage
RCD, of which, the detection, judgment and disconnection functions are independent of line voltage
3.20
RCD's functionally dependent on line voltage
RCD, of which, the detection, judgment and disconnection functions are dependent on line voltage
3.21
break time of RCD
the period from the moment of suddenly applying residual operating current to the moment of all electrode arcs going off
3.22
limit non-actuating time
the maximum delay time of applying a residual current value greater than residual non-operating current on RCD but not causing RCD to operate
3.23
time-delay RCD
RCD specially designed for corresponding to a given residual current value and reaching a predetermined limit non-actuating time
3.24
type AC residual current device
RCD which can ensure to release the suddenly applied or slowly rising residual sinusoidal alternating current
Contents of GB/T 13955-2017
Foreword i
Introduction iii
1 Scope
2 Normative References
3 Terms and Definitions
4 Application of RCD
4.1 Protection against Direct Contact Electric Shock Accident
4.2 Protection against Indirect Contact Electric Shock Accident
4.3 Selective Protection
4.4 Equipment and Place in Which RCD Shall be Installed
4.5 Situation Where RCD May not be Installed
5 Selection of RCD
5.1 Technical Conditions of RCD
5.2 Technical Parameters of RCD
5.3 Selection of RCD According to Power Supply Mode of Electrical Equipment
5.4 Selection of Rated Operating Current of RCD
5.5 Adoption of Selective Protection Mode
5.6 Selection of RCD According to Operating Environment Conditions of Electrical Equipment
5.7 Selection of Operating Parameters of RCD
5.8 Selection of RCD with Special Load and in Special Places
6 Installation of RCD
6.1 Installation Requirements of RCD
6.2 Requirements of RCD for Power Grid
6.3 Construction Requirements of RCD Installation
7 Operation and Management of RCD
Annex A (Normative) System Earthing Types
Annex B (Normative) Rated Value of RCD
Annex C (Informative) Reference of Selective Protection Mode
Bibliography
