GB 5226.3-2005 English PDF (GB5226.3-2005)

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GB 5226.3-2005: Safety of machinery -- Electrical equipment of machines -- Part 11: Requirements for HV equipment for voltages above 1 000 V a.c. or 1500Vd.c. and not exceeding 36kV
GB 5226.3-2005
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.020
J 09
GB 5226.3-2005 / IEC 60204-11:2000
Safety of Machinery - Electrical Equipment of Machines -
Part 11: Requirements for HV Equipment for Voltages
above 1,000 Va.c. or 1,500 Vd.c. and Not Exceeding 36 kV
(IEC 60204-11:2000, IDT)
ISSUED ON: SEPTEMBER 9, 2005
IMPLEMENTED ON: SEPTEMBER 1, 2006
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 ... 3
Introduction ... 4
1 Scope ... 6
2 Normative References ... 7
3 Definitions ... 9
4 General Requirements ... 16
5 Incoming Supply Conductor Terminations, Devices for Disconnecting and Switching
off, and Means for Earthing ... 18
6 Protection against Electric Shock ... 22
7 Protection of HV Equipment... 25
8 Equipotential Bonding ... 28
9 Control Circuits and Control Functions ... 33
10 Operator Interface and Machine-mounted Control Devices ... 33
11 Electronic Equipment ... 33
12 Controlgear: Location, Mounting, and Enclosures ... 33
13 Conductors and Cables ... 36
14 Wiring Practices ... 42
15 Electric Motors and Associated Equipment ... 45
16 Accessories ... 45
17 Marking, Warning Signs and Reference Designations ... 46
18 Technical Documentation ... 46
19 Testing and Verification ... 46
Annex A (informative) Examples of Machines Covered by this Part of GB 5226 ... 49
Annex B (informative) Inquiry Form for the HV Equipment of Machines ... 50
Annex C (informative) Method of Calculation for the Cross-sectional Area of Bare
Protective Conductors in Supply Systems with Direct Earthing or Low Impedance
Earthing of the Neutral ... 54
Annex D (informative) Relationship between Cable Rated Voltages and Highest
Voltage for HV Equipment ... 55
Annex E (informative) Rationalization of the Use of Terms Relating to Earthing and
Protective Bonding ... 56
Index ... 59
Foreword
In this Part, Clause 1, Clause 2, Clause 3, 4.5, 12.3 and Clause 18 are recommended, and
the remaining is mandatory.
GB 5226 Safety of Machinery - Electrical Equipment of Machines is divided into the following
parts:
---Part 1: General Requirements;
---Part 11: Requirements for HV Equipment for Voltages above 1,000 Va.c. or 1,500 Vd.c.
and Not Exceeding 36 kV;
---Part 31: Particular Safety and EMC Requirements for Sewing Machines, Units and
Systems;
---Part 32: Requirements for Hoisting Machines.
This is Part 11 of GB 5226. It equivalently adopts IEC 60204-11:2000 Safety of Machinery -
Electrical Equipment of Machines - Part 11: Requirements for HV Equipment for Voltages
above 1,000 Va.c. or 1,500 Vd.c. and Not Exceeding 36 kV (English Version).
This Part equivalently translates IEC 60204-11:2000.
In this Part, Annex A, Annex B, Annex C, Annex D and Annex E are informative.
This Part was proposed by China Machinery Industry Federation.
This Part shall be under the jurisdiction of National Technical Committee on Industrial
Machinery Electrical System of Standardization Administration of China (SAC/TC 231).
The drafting organizations of this Part: School of Mechanical Engineering, Beijing Union
University; Beijing Beikai Electric Co., Ltd.
The main drafters of this Part: Xue Lijun, Lv Dezeng, Huang Ping, Gong Daoxiong, Liu Huan.
Safety of Machinery - Electrical Equipment of Machines -
Part 11: Requirements for HV Equipment for Voltages
above 1,000 Va.c. or 1,500 Vd.c. and Not Exceeding 36 kV
1 Scope
This Part of GB 5226 applies to the electrical and electronic equipment and systems of machines,
including a group of machines working together in a coordinated manner, but excluding higher
level system aspects (i.e., communications between systems).
This Part is applicable to equipment, or parts of equipment, which operate with nominal supply
voltages above 1,000 V a.c. or 1,500 V d.c. and not exceeding 36 kV a.c. or d.c. with nominal
frequencies not exceeding 200 Hz. For higher voltages or frequencies, special requirements
may be needed.
In this Part, the term HV equipment also covers the LV equipment forming an integral part of
the equipment operating at high voltage. The requirements in this standard primarily cover the
parts operating at high voltage except where explicitly stated otherwise. Reference is made to
GB 5226.1-2002 for those requirements which also apply to HV equipment.
NOTE 1 Other LV equipment not forming part of the HV equipment and defined as operating at
voltages not exceeding 1,000 V a.c. or 1,500 V d.c. are covered by GB 5226.1.
NOTE 2 In this Part, the term “electrical” includes both electrical and electronic matters (i.e.,
electrical equipment means both the electrical and the electronic equipment).
The electrical equipment covered by this Part commences at the point of connection of the
supply to the electrical equipment of the machine (see 5.1).
NOTE 3 For the requirements for power supply installations, see HD 637:1999.
This Part is an application standard and is not intended to limit or inhibit technological
advancement. It does not cover all the requirements (e.g., guarding, interlocking or control)
which are needed or required by other standards or regulations in order to safeguard personnel
from hazards other than electrical hazards. Each type of machine has unique requirements to be
accommodated to provide adequate safety.
NOTE 4 In the context of this Part, the term “person” refers to any individual; “personnel” are
those persons who are assigned and instructed by the user or his agent(s) in the use and
care of the machine in question.
This Part specifically includes, but is not limited to, machines as defined in 3.26 (Annex A lists
examples of machines whose electrical equipment may be covered by this Part).
recommendations of the transformer supplier.
For the provision of protection against other abnormal conditions, see 7.5.
7.2.5 Overcurrent protective devices
The rated short-circuit breaking capacity shall be at least equal to the prospective fault current
at the point of installation. Where the short-circuit current to an overcurrent protective device
can include additional currents other than from the supply (e.g., from motors, from power factor
correction capacitors), those currents shall be taken into consideration.
Overcurrent protective devices for power circuits include fuses and circuit-breakers.
7.2.6 Rating and setting of overcurrent protective devices
The rated current of fuses or the setting current of other overcurrent protective devices shall be
selected as low as possible but adequate for the anticipated overcurrents (e.g., during starting
of motors or energizing of transformers). When selecting those protective devices,
consideration should be given to the protection of switching devices against damage due to
overcurrents (e.g., welding of the switching device contacts).
The rated current or setting of an overcurrent protective device is determined by the current-
carrying capacity of the conductors to be protected by that device in accordance with 13.4. That
should take into account the needs of coordination with other electrical devices in the protected
circuit. The recommendations of the supplier of those devices should be followed.
7.3 Earth Fault Protection
Earth fault protection shall be provided as described below when the earth-fault current can be