1 Scope
This specification specifies the main design principles to be followed in the electric power design in petrochemical plants.
This specification is applicable to the electric power design of production plant (including oil refining, chemical and coal chemical plants, hereinafter referred to as production plant) of newly constructed, reconstructed or expanded petrochemical enterprises.
2 Normative references
The following reference documents are indispensable for the application of this specification. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB 3836.14 Explosive atmospheres - Part 14: Classification of areas - Explosive gas atmosphere
GB 12326 Power quality - Voltage fluctuation and flicker
GB 12476.3 Electrical Apparatus for Use in the Presence of Combustible Dust—Part 3: Classification of Areas Where Combustible Dusts are or May be Present
GB 12476.5 Electrical apparatus for use in the presence of combustible dust - Part 5: Protection by enclosures “tD”
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB 50052 Code for design electric power supply systems
GB 50057-2010 Code for design protection of structures against lightning
GB 50058 Code for design of electrical installations in explosive atmospheres
GB/T 50062 Code for design of relaying protection and automatic device of electric power installation
GB/T 50063 Code for design of electrical measuring device of power system
GB/T 50064 Code for design of overvoltage protection and insulation coordination for AC electrical installations
GB 50160 Fire prevention code of petrochemical enterprise design
GB 50217-2007 Code for design of cables of electric engineering
GB 50227 Code for design of installation of shunt capacitors
GB 50260 Code for seismic design of electrical installations
GB 50556 Code for aseismic design of electrical facilities in industrial plants
SH 3097 Code for the design of static electricity grounding for petrochemical industry
CECS 31 Code for design of steel cable tray engineering
CECS 106 Technical specification for aluminum - Alloy cable tray
3 Basic provisions
3.1 The following principles shall be followed in the electric power design of production plant:
a) Earnestly implement national technical and economic policies to ensure personal and equipment safety, reliable power supply, advanced technology and economic feasibility.
b) Give priority to near-term design and combine it with the long-term design according to project characteristic, scale and development planning; properly remain the development side and reserve no land for expansion in principle.
c) Take overall consideration and determine reasonable layout and design scheme according to the nature of the load, capacity and environmental conditions.
d) Take various energy-saving measures actively for electrical design to reduce power consumption.
3.2 The implementation of this specification shall also meet the requirements of the relevant current national and professional standards and codes.
4 Power supply & distribution system
4.1 Load classification
4.1.1 The electrical loads of the production plant shall be classified into Class I loads, Class II loads and Class III loads according to their importance in the production process and requirements for power supply reliability and continuity.
4.1.2 Class I loads refer to the electrical loads for the production plants which need a long time to resume production after power restoration as well as the public works ensuring their normal operation where the working power supply of production plant is interrupted suddenly and thus leads to disruption of key continuous production processes and significant economic losses.
4.1.3 Among Class I loads, upon sudden power interruption of the production plant, those which cannot be subjected to power interruption in order to ensure safe shutdown, avoid causing explosion, fire, poisoning, casualties and key equipment damage, or make timely treatment in case of an accident to prevent accident expansion, protect key equipment, rescue and evacuate the working personnel shall be regarded as particularly important loads.
4.1.4 Class II loads refer to the electrical loads for the production plants which need a long time to resume production after power restoration as well as the public works ensuring their normal operation where the working power supply of production plants is interrupted suddenly and thus leads to significant economic losses.
4.1.5 Class III loads refer to all electrical loads other than Class I loads and Class II loads.
4.2 Power supply requirements
4.2.1 The power supply for Class I loads shall meet the following requirements:
Foreword i
1 Scope
2 Normative references
3 Basic provisions
4 Power supply & distribution system
4.1 Load classification
4.2 Power supply requirements
4.3 Power supply & distribution system
4.4 Selection of voltage & quality of electric energy
4.5 Reactive power compensation
5 Explosive hazardous environment
5.1 General provisions
5.2 Division of hazardous zones in the explosive environment
5.3 Measures to prevent explosion
5.4 Ranges of hazardous zones in the explosive gas environment
5.5 Ranges of hazardous zones in the explosive dust environment
5.6 Classification and grouping of explosive gas mixtures
5.7 Electrical equipment in the explosive environment
5.8 Design of electrical circuit in explosive environment
5.9 Explosive environment grounding design
6 Transformer substation
6.1 Site selection
6.2 Selection of 6kV~35kV major electrical equipment
6.3 Selection of low-voltage equipment
6.4 Arrangement of transformation & distribution device
6.5 Requirements for buildings, ventilation & other utilities
6.6 Fire protection requirements
6.7 Quake-proof requirements
7 Automatic devices & microprocessor-based integrated automation system
7.1 Automatic switching-over device of power supply
7.2 Automatic restart of motors
7.3 Microprocessor-based integrated automation system
7.4 Safety and management system for power supply operation
8 Selection and laying of cables
8.1 Selection of cables
8.2 General requirements for cable laying
8.3 Cable laying method
9 Power distribution
9.1 General requirements
9.2 Protection of motor & LV distribution line
9.3 Motor control device settings
10 Grounding
10.1 Grounding methods & basic requirements
10.2 Grounding of electrical equipment
11 Electrical energy saving
Annex A (Informative) Classification and grouping of explosive gas or vapor mixture
Annex B (Informative) Example of characteristics of combustible dust
Annex C (Informative) Example drawing and condition table for division of explosive hazardous zone
Explanation of wording in this specification
SH/T 3038-2017, SH 3038-2017, SHT 3038-2017, SH/T3038-2017, SH/T 3038, SH/T3038, SH3038-2017, SH 3038, SH3038, SHT3038-2017, SHT 3038, SHT3038
Introduction of SH/T 3038-2017
1 Scope
This specification specifies the main design principles to be followed in the electric power design in petrochemical plants.
This specification is applicable to the electric power design of production plant (including oil refining, chemical and coal chemical plants, hereinafter referred to as production plant) of newly constructed, reconstructed or expanded petrochemical enterprises.
2 Normative references
The following reference documents are indispensable for the application of this specification. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB 3836.14 Explosive atmospheres - Part 14: Classification of areas - Explosive gas atmosphere
GB 12326 Power quality - Voltage fluctuation and flicker
GB 12476.3 Electrical Apparatus for Use in the Presence of Combustible Dust—Part 3: Classification of Areas Where Combustible Dusts are or May be Present
GB 12476.5 Electrical apparatus for use in the presence of combustible dust - Part 5: Protection by enclosures “tD”
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 15543 Power quality - Three-phase voltage unbalance
GB 50052 Code for design electric power supply systems
GB 50057-2010 Code for design protection of structures against lightning
GB 50058 Code for design of electrical installations in explosive atmospheres
GB/T 50062 Code for design of relaying protection and automatic device of electric power installation
GB/T 50063 Code for design of electrical measuring device of power system
GB/T 50064 Code for design of overvoltage protection and insulation coordination for AC electrical installations
GB 50160 Fire prevention code of petrochemical enterprise design
GB 50217-2007 Code for design of cables of electric engineering
GB 50227 Code for design of installation of shunt capacitors
GB 50260 Code for seismic design of electrical installations
GB 50556 Code for aseismic design of electrical facilities in industrial plants
SH 3097 Code for the design of static electricity grounding for petrochemical industry
CECS 31 Code for design of steel cable tray engineering
CECS 106 Technical specification for aluminum - Alloy cable tray
3 Basic provisions
3.1 The following principles shall be followed in the electric power design of production plant:
a) Earnestly implement national technical and economic policies to ensure personal and equipment safety, reliable power supply, advanced technology and economic feasibility.
b) Give priority to near-term design and combine it with the long-term design according to project characteristic, scale and development planning; properly remain the development side and reserve no land for expansion in principle.
c) Take overall consideration and determine reasonable layout and design scheme according to the nature of the load, capacity and environmental conditions.
d) Take various energy-saving measures actively for electrical design to reduce power consumption.
3.2 The implementation of this specification shall also meet the requirements of the relevant current national and professional standards and codes.
4 Power supply & distribution system
4.1 Load classification
4.1.1 The electrical loads of the production plant shall be classified into Class I loads, Class II loads and Class III loads according to their importance in the production process and requirements for power supply reliability and continuity.
4.1.2 Class I loads refer to the electrical loads for the production plants which need a long time to resume production after power restoration as well as the public works ensuring their normal operation where the working power supply of production plant is interrupted suddenly and thus leads to disruption of key continuous production processes and significant economic losses.
4.1.3 Among Class I loads, upon sudden power interruption of the production plant, those which cannot be subjected to power interruption in order to ensure safe shutdown, avoid causing explosion, fire, poisoning, casualties and key equipment damage, or make timely treatment in case of an accident to prevent accident expansion, protect key equipment, rescue and evacuate the working personnel shall be regarded as particularly important loads.
4.1.4 Class II loads refer to the electrical loads for the production plants which need a long time to resume production after power restoration as well as the public works ensuring their normal operation where the working power supply of production plants is interrupted suddenly and thus leads to significant economic losses.
4.1.5 Class III loads refer to all electrical loads other than Class I loads and Class II loads.
4.2 Power supply requirements
4.2.1 The power supply for Class I loads shall meet the following requirements:
Contents of SH/T 3038-2017
Foreword i
1 Scope
2 Normative references
3 Basic provisions
4 Power supply & distribution system
4.1 Load classification
4.2 Power supply requirements
4.3 Power supply & distribution system
4.4 Selection of voltage & quality of electric energy
4.5 Reactive power compensation
5 Explosive hazardous environment
5.1 General provisions
5.2 Division of hazardous zones in the explosive environment
5.3 Measures to prevent explosion
5.4 Ranges of hazardous zones in the explosive gas environment
5.5 Ranges of hazardous zones in the explosive dust environment
5.6 Classification and grouping of explosive gas mixtures
5.7 Electrical equipment in the explosive environment
5.8 Design of electrical circuit in explosive environment
5.9 Explosive environment grounding design
6 Transformer substation
6.1 Site selection
6.2 Selection of 6kV~35kV major electrical equipment
6.3 Selection of low-voltage equipment
6.4 Arrangement of transformation & distribution device
6.5 Requirements for buildings, ventilation & other utilities
6.6 Fire protection requirements
6.7 Quake-proof requirements
7 Automatic devices & microprocessor-based integrated automation system
7.1 Automatic switching-over device of power supply
7.2 Automatic restart of motors
7.3 Microprocessor-based integrated automation system
7.4 Safety and management system for power supply operation
8 Selection and laying of cables
8.1 Selection of cables
8.2 General requirements for cable laying
8.3 Cable laying method
9 Power distribution
9.1 General requirements
9.2 Protection of motor & LV distribution line
9.3 Motor control device settings
10 Grounding
10.1 Grounding methods & basic requirements
10.2 Grounding of electrical equipment
11 Electrical energy saving
Annex A (Informative) Classification and grouping of explosive gas or vapor mixture
Annex B (Informative) Example of characteristics of combustible dust
Annex C (Informative) Example drawing and condition table for division of explosive hazardous zone
Explanation of wording in this specification
