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Code for design of high voltage electrical installation (3～110kV)
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Design code for high voltage electrical installation (3~110kv)
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Basic data
| Standard ID | GB 50060-2008 (GB50060-2008) |
| Description (Translated English) | Code for design of high voltage electrical installation (3��110kV) |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | P63 |
| Classification of International Standard | 91.140.50 |
| Word Count Estimation | 36,381 |
| Date of Issue | 2008-12-15 |
| Date of Implementation | 2009-06-01 |
| Older Standard (superseded by this standard) | GB 50060-1992 |
| Regulation (derived from) | Bulletin of the Ministry of Housing and Urban No. 194 |
| Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China |
| Summary | This Chinese standard applies to new construction and expansion of 3 ~ 110kV high-voltage power distribution equipment engineering design. Distribution equipment should be designed according to the nature of power load, capacity, environmental conditions and operation, installation and maintenance requirements, selection of equipment and the development of reasonable layout scheme. Should be used in the technical economic rationality, high efficiency, low energy consumption of electrical equipment and materials. Distribution equipment shall be designed according to the project characteristics, scale and development planning, so far, the recent combination, and should be recent -based, and should be properly left room for expansion. Distribution equipment must be designed to adhere to the principle of conservation land. Distribution equipment design in addition to the implementation of this standard, there should be consistent with existing national standards. |
GB 50060-2008: Code for design of high voltage electrical installation (3～110kV)
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OF THE PEOPLE'S REPUBLIC OF CHINA
Code for Design of High Voltage Electrical
Installation (3~ 110kV)
Chief Development ,Department. China Electricity Council
Approval Department. Ministry of Housing and Urban-rural Development of the
People's Republic of China
Implementation Date. June 1, 2009
Beijing 2009
Table of Contents
General Provisions ... 1
2 General Requirements ... 2
3 Environmental Conditions ... 3
4 Selections of Conductor and Electric Appliance ... ; ... 5
4.1 General Requirement ... 5
4.2 Selection of Conductor ... 6
4.3 Selection of Electric Appliance ... 7
5 Electrical Installation ... 9
5 .1 Security Clear Distance in Electrical Installation ... 9
5 .2 Type Selection of Electrical Installation ... 13
5 .3 Disposal of Electrical Installation ... 13
5.4 Channel and Shed in Electrical Installation ... 14
5.5 Fire Prevention and Oil-storage Facilities ... 15
6 GIS Electrical Installation ... 18
7 Requirements of Electrical Installation to Building and Structures ... 19
7.1 Requirements oflndoor Electrical Installation to Building ... 19
7.2 Requirements of Structures on Outdoor Electrical Installation ... 20
7.3 Requirement of Building on Indoor GIS Electrical Installation ... 20
Appendix A Allowable Long-term Current-carrying Capacity of Rectangular Aluminum
Conductor ... 22
Appendix B Grading Standards of Line and Filth of Power Plant and Transformer substation
... 23
Explanation of Wording in This Code ... 25
1 General Provisions
1.0.1 This code is formulated with a view to make the design of high voltage electrical
installation (short for electrical installation) (3- llOkV) be safe, economic feasibility, easy
access and maintenance and state-of-art technology.
1.0.2 This code is applicable to the designs of construction and extension of high voltage
electrical installation project (3-11 OkV).
1.0.3 As for the design of electrical installation, the equipment shall be adopted and the
disposal project shall be established according to the requirements of power load property,
capacity, environmental condition and operation, setting, maintenance. The electric
installation and material which provided with high efficiency and low energy consumption
shall be adopted when the technical economy is logical.
1.0.4 The conjugation of long term and near term is required for the design of electrical
installation according to the project character, scale and development planning, and it is
required to give priority to the near term, at the same time, the room for extension shall be
reserved befittingly.
1.0.5 The principle of optimal land utilization must be adopted in the design of electrical
installation.
1.0.6 Not only the requirements stipulated in this code, but also those in the current relevant
ones of the nation shall be complied with in the design of electrical installation.
2 General Requirements
2.0.1 The selection of disposal, conductor, electrical equipment as well as structure of
electrical installation shall meet the safety requirements of normal running, setting servicing,
short circuit and over-voltage under the local environmental condition, and the requirement of
system planned capacity of 10- 15 years shall be met.
2.0.2 The phase sequence arrangement of each loop of electrical installation should be
accordant. The line may be disposed reversely according to the surface from left to right, from
far to vicinity, from top to bottom; the phase sequence arrangement is A, B, C. The indoor
hard conductor and outdoor bus structure shall be provided with phase color mark, the phase
color mark of A, B and C shall be yellow, green and red respectively. For the expansion
project, the phase sequence shall be accordant with original electrical installations.
2.0.3 For the bus marshaling sequence of electrical installation (66- llOkV), the bus
disposed next to the transformer side should be Bus I, the bus disposed closed to the line side
should be Bus II; for the marshaling sequence of bus of double layers in electrical installation,
the bus disposed in the under-layer should be Bus I, the bus disposed on the top layer should
be Bus II.
2.0.4 The outdoor open electrical installation (11 OkV) shall not be serviced in electrified
state.
2.0.5 For the open electrical installation (66- 11 OkV), the bus arrester and voltage transformer
should be provided with a same suite of disconnecting switch together.
2.0.6 For the open electrical installation (66- 11 OkV), the breaker side of disconnecting
switch on the both sides of breaker and the line side of disconnecting switch of line should be
provided with ground switch. GIS should be provided with disconnecting break.
2.0.7 For the open electrical installation (66- 1 lOkV), the ground switch shall be provided
for each section of bus.
2.0.8 For the open electrical installation (66- 11 OkV), the voltage transformer should be
installed on the triple-phase of each group of main bus-bar. When the line side is required to
be monitored and detected to confirm if there is any voltage, one phase on the offtrack side
should be installed with voltage transformer.
2.0.9 For the electrical installation ( 66- 11 Ok V), the loop which provided with breaker shall
be installed current transformer.
2.0.10 The blocking device shall be installed between the indoor, outdoor electrical
installation and commensurate breaker and earthing knife switch. When the indoor
electrical installation device is disposed in low-head, the blocking device which prevents
false-enter of electrification break shall be set.
2.0.11 The disposal of oil charge electrical equipment in electrical installation shall meet the
requirement of security convenience when the oil level and oil temperature is observed in
electrified state, and the sample of oil shall be easy to take out.
4 Selections of Conductor and Electric Appliance
4.1 General Provisions
4.1.1 The maximum working voltage of adopted electric appliance must not be less than the
maximum operating voltage value of system where it located in; the selection of magnitude of
voltage shall meet the requirements of current nation standard "Standard Voltage" with a
serial number of GB 156.
4.1.2 The long-term allowable current of adopted conductor shall not be less than the
continuous working current of the loop. For the outdoor conductor, the impact of sunshine on
the current capacity shall be measured. As for the electric appliance of continuous duty, the
rated current shall meet the loop continuous working current requirements in different kinds
of possible operating mode.
4.1.3 The checking computation of short-circuit current of conductor and dynamic stability,
thermal as well as electric appliance switch current shall be calculated according to the system
planning capacity of 10-15 years.
At the time of confirming the short-circuit current, it is required to calculate in the
normal mode of connection of possible maximum short-circuit current. It is suitable to
recompute in three-phase short-circuit, when the single-phase or two-phase ground short-
circuit current is large than three-phase short-circuit current, it is required to recompute
according to the severe condition.
4.1.4 For the computing time of re-computating short-circuit current heating effect of
conductor, it is suitable to adopt actuation time of main protection plus switching off time of
commensurate breaker. When dead band appears in main protection, the actuation time of
reserve protection which acts on the dead band shall be adopted, and the commensurate short-
circuit current value shall be adopted.
For the computing time of re-computating short-circuit current heating effect of electric
appliance, it is suitable to adopt actuation time ofreserve protection plus switching off time of
commensurate breaker.
4.1.5 The conductor and electric appliance which protected in fuse may not be recomputed
for the thermal arrest; the conductor and electric appliance shall be recomputed for the
dynamic stability except the ones which protected in fuse with metering function .
The voltage transformer loop which protected in fuse may not be recomputated for the
dynamic and thermal effect.
4.1.6 The nor.rnal maximum operating temperature of bare conductor shall not be large than
70 ·c, at the time of take account of sunshine impact, the steel reinforced aluminum wire and
tubiform conductor should not be large than 80 ·c.
The maximum operating temperature of heatproof conductor of special type may be
adopted according to the data provided from the manufactory, but the impact of conductor of
steel wire should be adopted.
4.2.3 The rectangle, dual slot and tubifonn may be adopted for hard conductor. The allowable
current capacity of rectangle aluminum conductor shall meet the requirements of Appendix A
in this code.
4.2.4 The design of hard conductor shall meet the requirements of irregular settlement,
temperature fluctuation and oscillation and other factors.
4.3 Selection of Electric Appliance
4.3.1 The insulation withstand level of electrical equipment shall meet the relevant
requirem~nts of current national standard Insulation Co-ordination for "High Voltage
Transmission and Distribution Equipment" with a serial number of GB 311.1. The creepage
distance of electrotechnical porcelain of high voltage electrical equipment shall...
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