GB/T 40820-2021 English PDF (GBT40820-2021)

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GB/T 40820-2021: Residual direct current detecting device (RDC-DD) to be used for mode 3 charging of electric vehicles
GB/T 40820-2021
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.120.50
CCS K 31
GB/T 40820-2021 / IEC 62955:2018
Residual Direct Current Detecting Device (RDC-DD)
to be Used for Mode 3 Charging of Electric Vehicles
(IEC 62955:2018, IDT)
ISSUED ON: OCTOBER 11, 2021
IMPLEMENTED ON: MAY 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 4
1 Scope ... 6
2 Normative References ... 7
3 Terms, Definitions and Symbols ... 8
4 Classification of RDC-DD (RDC-MD, RDC-PD) ... 9
5 Characteristics of RDC-DDs ... 12
6 Marking and Other Product Information ... 17
7 Standard Conditions for Operation in Service and for Installation ... 19
8 Requirements for Construction and Operation ... 20
9 Tests ... 33
Annex A (Normative) Test Sequence and Number of Samples to be Submitted for
Testing Purposes ... 97
Annex B (Normative) Determination of Clearances and Creepage Distances ... 102
Annex C (Normative) Arrangement for the Detection of the Emission of Ionized Gases
during Short-Circuit Tests ... 109
Annex D (Normative) Routine Tests ... 112
Annex E (Informative) Methods for Determination of Short-Circuit Power-Factor 113
Annex F (Informative) Examples of Terminal Designs ... 115
Annex G (Informative) Correspondence between ISO and AWG Copper Conductors
... 119
Annex H (Informative) SCPDs for Short-Circuit Tests ... 120
Annex I (Normative) Particular Requirements for RDC-DDs with Screwless Type
Terminals for External Copper Conductors ... 122
Annex J (Normative) Particular Requirements for RDC-DDs with Flat Quick-Connect
Terminations ... 131
Annex K (Normative) Specific Requirements for RDC-DDs with Screw-Type
Terminals for External Untreated Aluminium Conductors and with Aluminium Screw-
Type Terminals for Use with Copper or with Aluminium Conductors ... 139
Annex L (Informative) Examples of RDC-DD according to Construction Classification
... 150
Annex M (Normative) Additional Requirements and Tests for RDC-MDs according to
Classification 4.1.1.2 Consisting of an RDC-M-Unit Designed to be Assembled on Site
together to a Separate Switching Protective Device ... 152
Annex N (Normative) Additional Requirements and Tests for RDC-MDs according to
Classification 4.1.1.3 Consisting of an RDC-MD Module Electrically Coupled to a
Separate Switching Device or a Protective Device ... 157
Annex O (Normative) RDC-PDs with Integrated DC, Pulsating DC (Type A) and 6 mA
DC Detection, Evaluation and Mechanical Switching in one Unit according to
Classification 4.1.2 ... 162
Bibliography ... 165
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document used translation method to equivalently adopt IEC 62955:2018 Residual Direct
Current Detecting Device (RDC-DD) to be Used for Mode 3 Charging of Electric Vehicles.
The Chinese documents that have a consistent correspondence with the international documents
normatively cited in this document are as follows:
--- GB/T 2424.2-2005 Environment Tests for Electric and Electronic Products - Guidance
for Damp Heat Tests (IEC 60068-3-4:2001, IDT);
--- GB/T 4208-2017 Degrees of Protection Provided by Enclosure (IP Code) (IEC
60529:2013, IDT);
--- GB 4343.1-2018 Electromagnetic Compatibility Requirements for Household
Appliances, Electric Tools and Similar Apparatus - Part 1: Emission (CISPR 14-1:2011,
IDT);
--- GB/T 5169.10-2017 Fire Hazard Testing for Electric and Electronic Products - Part 10:
Glowing/Hot-Wire Based Test Methods - Glow-Wire Apparatus and Common Test
Procedure (IEC 60695-2-10:2013, IDT);
--- GB/T 16895 (all parts) Low-Voltage Electrical Installations [IEC 60364 (all parts)];
--- GB/T 16916.1-2014 Residual Current Operated Circuit-Breakers Without Integral
Overcurrent Protection for Household and Similar Uses (RCCB) - Part 1: General Rules
(IEC 61008-1:2012, MOD);
--- GB/T 16917.1-2014 Residual Current Operated Circuit-breakers with Integral
Overcurrent Protection for Household and Similar Uses (RCBOs) - Part 1: General Rules
(IEC 61009-1:2012, MOD);
--- GB/T 18499-2008 Residual Current Operated Protective Devices (RCD) for Household
and Similar Use - Electromagnetic Compatibility (IEC 61543:1995, IDT).
This Document made the following editorial modifications:
--- Move the informative references of IEC 60112 and IEC 60664-3 from Clause 2 to
Bibliography;
--- Supplement the cross-sectional area of the connectable copper conductors with rated
currents of 63A to 125A omitted in Table 7, which is consistent with the relevant
standards of residual current protection electrical apparatus;
Residual Direct Current Detecting Device (RDC-DD)
to be Used for Mode 3 Charging of Electric Vehicles
1 Scope
This Document specifies the classification, characteristics, marking, conditions of use and
installation, technical requirements for structure and operation, and corresponding tests of
residual direct current detecting device (RDC-DD) to be used for Mode 3 charging of electric
vehicles.
This Document applies to residual direct current detecting devices (RDC-DD) for permanently
connected AC charging stations of electric vehicle (mode 3 charging of electric vehicles,
according to IEC 61851-1 and IEC 60364-7-722), hereafter referred to as RDC-MD (residual
direct current monitoring device) or RDC-PD (residual direct current protective device), with
rated voltages not exceeding 440 V AC, rated frequencies of 50 Hz, 60 Hz or 50/60 Hz and
rated currents not exceeding 125 A.
NOTE 1: This document can also be used as guidance for devices for voltages up to and including 690
V AC 50 Hz, 60 Hz or 50/60 Hz, at a rated current not exceeding 250 A.
RDC-DDs are intended to remove or initiate removal of the supply to the EV in cases where a
smooth residual direct current equal to or above 6 mA is detected.
NOTE 2: The value of 6 mA for smooth residual direct current was chosen to prevent impairing the
correct operation of an upstream type A or type F RCD.
This Document covers two different classes of residual direct current detecting device (RDC-
DD) to be used for mode 3 charging of electric vehicles (see classification in 4.1):
– RDC-MD (monitoring devices), and
– RDC-PD (protective devices).
This Document applies to devices performing simultaneously the functions of detection of the
residual direct current, of comparison of the value of this current with the residual operating
value, and initiating the opening of the circuit when the residual direct current exceeds 6 mA.
RDC-PDs according to this document are suitable for isolation.
RDC-DDs are intended to be used for single-phase or multi-phase circuits in TN-, TT- and IT
systems.
RDC-DDs are intended to be used within the fixed installation.
RDC-DDs are intended to be used in AC circuits only. RDC-DDs according to this document
are not intended for bilateral power flow between electric vehicle and fixed installation.
For RDC-DDs with integrated AC, pulsating DC and 6 mA DC detection, evaluation and
mechanical switching in one unit, Annex O applies.
For RDC-MD consisting of an RDC-M-unit with a mechanical interface to a separate protective
device (circuit breaker or RCD), Annex M applies.
For RDC-MD consisting of an RDC-M-module with separated residual current detection and
eva...