GB/T 13955-2017 PDF English
US$145.00 · In stock · Download in 9 secondsGB/T 13955-2017: Installation and operation of residual current operated protective devices Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 13955: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 13955-2017 | English | 145 |
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Installation and operation of residual current operated protective devices
| Valid |
| GB 13955-2005 | English | 70 |
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[GB/T 13955-2005] Installation and operation of residual current operated protective devices
| Obsolete |
| GB 13955-1992 | English | 479 |
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Instsllating and operation of residual current operated protective devices
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 13955-2017
GB/T 13955-2017: Installation and operation of residual current operated protective devices---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT13955-2017
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
5 Selection of RCDs... 16
6 Installation of RCDs... 19
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
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)
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
direct contact
Contact between humans, animals AND live conductors.
3.2
indirect contact
Contact between humans and animals AND the exposed conductor of a device
that become charged in the event of a fault.
3.3
residual current
IΔ
An effective value of the vector sum of the current that passes through the
RCD’s main circuit.
3.4
residual operating current
A residual current value that makes the RCD operate under specified conditions.
3.5
rated residual operating current
IΔn
A residual operating current value specified by the manufacturer for RCDs. At
this current value, the RCD shall operate under specified conditions.
3.6
residual non-operating current
A residual current value, when less than or equal to this current, the RCD does
not operate under specified conditions.
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).
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.
4.2.2 Protection requirements for TN systems
4.3 Selective protection
In low-voltage power supply systems, in order to reduce the range of power
failure caused by the occurrence of personal electric shock accidents and earth
faults, the RCD shall adopt selective protection.
4.4 Equipment and locations where RCD shall be installed
4.4.1 End protection
End protection RCD shall be installed on the following equipment and locations.
4.4.2 Line protection
When the low-voltage distribution line adopts two-level or three-level protection
according to the specific conditions, install the RCD at the power supply end,
the head end of the load group, or the end of the line (the power distribution
box of the agricultural production equipment).
4.5 Cases where RCD may not be installed
Electrical equipment and locations with the following conditions may not be
installed with RCD.
5 Selection of RCDs
5.1 Technical conditions of RCDs
It shall comply with the specifications of GB/Z 6829, GB/T 10963.1, GB/T
14048.2, GB/T 16916, GB/T 16917, GB/T 20044, GB/T 28527, GB/T 22794,
GB/T 22387, etc., and pass the China Compulsory Product Certification.
5.2 Technical parameters of RCDs
The rated values (see Annex B) of technical parameters of RCDs shall be
compatible with the technical parameters of the lines or equipment being
protected and the specific conditions used for installation.
5.3 Selection of RCD according to the power supply mode of electrical
equipment
5.4 Selection of rated operating current of RCDs
For the selection of the rated operating current of RCDs, the following factors
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.
5.8 Selection of RCD for special loads and locations
For installing RCD for medical equipment in the hospitals listed in 4.4.1 i), it
shall select the RCD with a rated residual current of 10 mA and without time
delay.
6 Installation of RCDs
6.1 Installation requirements for RCDs
The installation requirements for RCDs are as follows.
6.3 Construction requirements for installation of RCDs
The construction requirements for installation of RCDs are as follows.
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.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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