Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This specification was revised by the drafting group according to the requirements of Notice on printing and distributing the development and revision plan on the third batch of professional standards in 2015 (GONGXINTINGKE [2015] No.115) issued by the Ministry of Industry and Information Technology of the People's Republic of China, through extensive investigation, careful summarization of practical experience on specification implementation and actual engineering, reference to relevant international, foreign and domestic standards and extensive solicitation of opinions.
This Specification consists of 8 clauses.
The main contents of this Specification include instrumentation power supply range and load level, quality indexes of instrument power supply, configuration of AC power supply for instruments, design of instrument power supply system and selections of power equipment and wiring of power supply system.
This specification is a revision of SH/T 3082-2003 Design code for instrument power supply in petrochemical industry, with the main technical contents revised as follows:
——The DC stabilized power supply quality index;
——The configuration scheme of AC power supply for instruments;
——The instrument power supply system wiring principle;
——The selection of power equipment and wiring of power supply system.
This Specification was firstly issued in 1997 and revised for the first time in 2003. This is the second revision.
Design specification for instrumentation power supply in petrochemical industry
1 Scope
This Specification specifies the design principles and basic requirements of power supply range, load level, power supply quality, configuration scheme, design, selection of power equipment and wiring of power supply system.
This Specification is applicable to the engineering design for power supply system of instrument and control system in petrochemical engineering and in new construction, extension and renovation of enterprises using coal as raw materials to prepare oil and chemical products.
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 50052 Code for design electric power supply systems
GB 50054 Code for design of low voltage electrical installations
GB 50217 Standard for design of cables of electric power engineering
GB 14048.2 Low-voltage switchgear and controlgear - Part 2: Circuit-breakers
DL/T 1074 Integrated uninterruptible power supply equipment of DC and AC for power system
SH/T 3038 Specification for electric power design in petrochemical plants
SH/T 3081 Design code for instrument grounding in petrochemical industry
SH/T 3164 Specification for design of instrument system lightning surge protection in petrochemical industry
3 Terms and abbreviations
For the purposes of this Specification, the following terms and abbreviations apply.
3.1 Terms
3.1.1
uninterruptible power supply
power supply device composed of rectifier, inverter and DC storage battery, which is capable of providing power meeting the specification of AC power supply and meets the limit of momentary power failure
3.1.2
power capacity
rated capacity for power supply outputting power, with the capacity of DC power supply usually expressed in amperes (A) of output current, and that of AC power supply expressed in volt-ampere (VA) or kilovolt-ampere (kVA)
3.1.3
momentary power failure
short time (millisecond-level) interruption of power supply during power switching
3.1.4
momentary voltage drop
short time (millisecond level) voltage drop caused by power switching process
3.1.5
power-on surge condition
current increase for a short time when the instrument system is turned on
3.1.6
ripple voltage
percentage of the ratio of the total AC component (peak-to-peak value) of the output voltage to the average voltage
3.1.7
circuit-breaker
mechanical switching device that can switch on, carry and break the current under normal circuit conditions, and also switch on, carry for a certain time and break the current under specified abnormal conditions such as short circuit
3.1.8
breaking current
current flowing through a pole of a switching device or a circuit breaker at the moment when an arc is generated in the breaking process
3.1.9
breaking capacity
expected breaking current value that the switching device or circuit breaker can break under the specified voltage in the specified use and performance conditions
3.2 Abbreviations
DCS Distributed Control System
SCADA Supervisory Control and Data Acquisition
FCS Fieldbus Control System
PLC Programmable Logic Controller
SIS Safety Instrumented System
CCS Compressor Control System
MMS Machinery Monitoring System
GDS Gas Detection System
PAS Process Analyzer System
GPS General Power Supply
4 Instrument power supply range and load level
4.1 Instrument power supply range
4.1.1 Instrument and control system power supply should cover:
a) process control system (DCS, PLC, FCS, SCADA, etc.);
b) safety instrumented system (SIS);
c) compressor control system (CCS);
d) machinery monitoring system (MMS);
e) gas detection system (GDS);
f) process analyzer system (PAS);
g) electronic instruments installed in the cabinet room and control room;
h) on-site detection and alarm instrument and actuators.
4.1.2 The power supply of the auxiliary facilities of instrument should include:
a) Power supply for lighting and ventilation equipment (exhaust fan) in the instrument panel (cabinet), and power socket for instrument maintenance and repair, etc.;
b) Power supply for lighting, ventilation and power distribution of on-line analysis instrument room, and the electric tracing of sampling line/pretreatment system/sample recovery system;
c) Electric tracing of field instruments and measuring pipes.
4.2 Load classification
According to the importance of the electrical loads in the production process and the reliability and continuity requirements of the power supply, the electrical loads of the production equipment shall be divided into the following types:
a) Class I loads: electrical loads of production equipment that will lead to the disruption of critical continuous production processes and cause significant economic losses when subjected to a sudden interruption of power supply and will take a long time to resume production after power supply is restored, as well as the electrical loads of the public works for such equipment;
b) Particularly important loads among Class I loads: Class I loads whose power supply is not allowed to be cut off in case of a sudden interruption of power supply so as to ensure safety shutdown and avoid explosions, fires, poisoning, personal injury or death and damage to critical equipment, or, in case of an accident, to deal with it in a timely manner, prevent the escalation of the accident, protect critical equipment, rescue and evacuate staffs, etc.
c) Class II loads: electrical loads of production equipment that will cause large economic losses after a sudden interruption of power supply and take a long time to resume normal production after power supply is restored, as well as the electrical loads of the public works for such equipment;
d) Class III loads: all electrical loads other than Class I loads and Class II loads.
4.2.1 The power supply for instrument and control system belongs to particularly important loads among Class I loads, for which UPS shall be adopted.
4.2.2 The power supply for the auxiliary facilities of instruments belongs to Class III loads, for which GPS should be adopted.
Foreword i 1 Scope 2 Normative references 3 Terms and abbreviations 3.1 Terms 3.2 Abbreviations 4 Instrument power supply range and load level 4.1 Instrument power supply range 4.2 Load classification 5 Quality indexes of instrument power supply 5.1 General requirements 5.2 Quality indexes 6 Configuration of AC power supply for instruments 6.1 General requirements 6.2 Double output power supply configuration for single UPS+GPS 6.3 Double output power supply configuration for double UPS 6.4 Multiple output power supply configuration for double UPS 6.5 Multiple output power supply configuration for multiple UPS 6.6 Power output wiring specification of AC UPS 7 Design of instrument power supply system 7.1 General requirements 7.2 Wiring regulations for power supply system 8 Selections of power equipment and wiring of power supply system 8.1 Selection regulations of power supply equipment 8.2 Selections of power supply equipment 8.3 Wiring of power supply system Explanation of wording in this Specification
SH/T 3082-2019, SH 3082-2019, SHT 3082-2019, SH/T3082-2019, SH/T 3082, SH/T3082, SH3082-2019, SH 3082, SH3082, SHT3082-2019, SHT 3082, SHT3082
Introduction of SH/T 3082-2019
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This specification was revised by the drafting group according to the requirements of Notice on printing and distributing the development and revision plan on the third batch of professional standards in 2015 (GONGXINTINGKE [2015] No.115) issued by the Ministry of Industry and Information Technology of the People's Republic of China, through extensive investigation, careful summarization of practical experience on specification implementation and actual engineering, reference to relevant international, foreign and domestic standards and extensive solicitation of opinions.
This Specification consists of 8 clauses.
The main contents of this Specification include instrumentation power supply range and load level, quality indexes of instrument power supply, configuration of AC power supply for instruments, design of instrument power supply system and selections of power equipment and wiring of power supply system.
This specification is a revision of SH/T 3082-2003 Design code for instrument power supply in petrochemical industry, with the main technical contents revised as follows:
——The DC stabilized power supply quality index;
——The configuration scheme of AC power supply for instruments;
——The instrument power supply system wiring principle;
——The selection of power equipment and wiring of power supply system.
This Specification was firstly issued in 1997 and revised for the first time in 2003. This is the second revision.
Design specification for instrumentation power supply in petrochemical industry
1 Scope
This Specification specifies the design principles and basic requirements of power supply range, load level, power supply quality, configuration scheme, design, selection of power equipment and wiring of power supply system.
This Specification is applicable to the engineering design for power supply system of instrument and control system in petrochemical engineering and in new construction, extension and renovation of enterprises using coal as raw materials to prepare oil and chemical products.
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 50052 Code for design electric power supply systems
GB 50054 Code for design of low voltage electrical installations
GB 50217 Standard for design of cables of electric power engineering
GB 14048.2 Low-voltage switchgear and controlgear - Part 2: Circuit-breakers
DL/T 1074 Integrated uninterruptible power supply equipment of DC and AC for power system
SH/T 3038 Specification for electric power design in petrochemical plants
SH/T 3081 Design code for instrument grounding in petrochemical industry
SH/T 3164 Specification for design of instrument system lightning surge protection in petrochemical industry
3 Terms and abbreviations
For the purposes of this Specification, the following terms and abbreviations apply.
3.1 Terms
3.1.1
uninterruptible power supply
power supply device composed of rectifier, inverter and DC storage battery, which is capable of providing power meeting the specification of AC power supply and meets the limit of momentary power failure
3.1.2
power capacity
rated capacity for power supply outputting power, with the capacity of DC power supply usually expressed in amperes (A) of output current, and that of AC power supply expressed in volt-ampere (VA) or kilovolt-ampere (kVA)
3.1.3
momentary power failure
short time (millisecond-level) interruption of power supply during power switching
3.1.4
momentary voltage drop
short time (millisecond level) voltage drop caused by power switching process
3.1.5
power-on surge condition
current increase for a short time when the instrument system is turned on
3.1.6
ripple voltage
percentage of the ratio of the total AC component (peak-to-peak value) of the output voltage to the average voltage
3.1.7
circuit-breaker
mechanical switching device that can switch on, carry and break the current under normal circuit conditions, and also switch on, carry for a certain time and break the current under specified abnormal conditions such as short circuit
3.1.8
breaking current
current flowing through a pole of a switching device or a circuit breaker at the moment when an arc is generated in the breaking process
3.1.9
breaking capacity
expected breaking current value that the switching device or circuit breaker can break under the specified voltage in the specified use and performance conditions
3.2 Abbreviations
DCS Distributed Control System
SCADA Supervisory Control and Data Acquisition
FCS Fieldbus Control System
PLC Programmable Logic Controller
SIS Safety Instrumented System
CCS Compressor Control System
MMS Machinery Monitoring System
GDS Gas Detection System
PAS Process Analyzer System
GPS General Power Supply
4 Instrument power supply range and load level
4.1 Instrument power supply range
4.1.1 Instrument and control system power supply should cover:
a) process control system (DCS, PLC, FCS, SCADA, etc.);
b) safety instrumented system (SIS);
c) compressor control system (CCS);
d) machinery monitoring system (MMS);
e) gas detection system (GDS);
f) process analyzer system (PAS);
g) electronic instruments installed in the cabinet room and control room;
h) on-site detection and alarm instrument and actuators.
4.1.2 The power supply of the auxiliary facilities of instrument should include:
a) Power supply for lighting and ventilation equipment (exhaust fan) in the instrument panel (cabinet), and power socket for instrument maintenance and repair, etc.;
b) Power supply for lighting, ventilation and power distribution of on-line analysis instrument room, and the electric tracing of sampling line/pretreatment system/sample recovery system;
c) Electric tracing of field instruments and measuring pipes.
4.2 Load classification
According to the importance of the electrical loads in the production process and the reliability and continuity requirements of the power supply, the electrical loads of the production equipment shall be divided into the following types:
a) Class I loads: electrical loads of production equipment that will lead to the disruption of critical continuous production processes and cause significant economic losses when subjected to a sudden interruption of power supply and will take a long time to resume production after power supply is restored, as well as the electrical loads of the public works for such equipment;
b) Particularly important loads among Class I loads: Class I loads whose power supply is not allowed to be cut off in case of a sudden interruption of power supply so as to ensure safety shutdown and avoid explosions, fires, poisoning, personal injury or death and damage to critical equipment, or, in case of an accident, to deal with it in a timely manner, prevent the escalation of the accident, protect critical equipment, rescue and evacuate staffs, etc.
c) Class II loads: electrical loads of production equipment that will cause large economic losses after a sudden interruption of power supply and take a long time to resume normal production after power supply is restored, as well as the electrical loads of the public works for such equipment;
d) Class III loads: all electrical loads other than Class I loads and Class II loads.
4.2.1 The power supply for instrument and control system belongs to particularly important loads among Class I loads, for which UPS shall be adopted.
4.2.2 The power supply for the auxiliary facilities of instruments belongs to Class III loads, for which GPS should be adopted.
Contents of SH/T 3082-2019
Foreword i
1 Scope
2 Normative references
3 Terms and abbreviations
3.1 Terms
3.2 Abbreviations
4 Instrument power supply range and load level
4.1 Instrument power supply range
4.2 Load classification
5 Quality indexes of instrument power supply
5.1 General requirements
5.2 Quality indexes
6 Configuration of AC power supply for instruments
6.1 General requirements
6.2 Double output power supply configuration for single UPS+GPS
6.3 Double output power supply configuration for double UPS
6.4 Multiple output power supply configuration for double UPS
6.5 Multiple output power supply configuration for multiple UPS
6.6 Power output wiring specification of AC UPS
7 Design of instrument power supply system
7.1 General requirements
7.2 Wiring regulations for power supply system
8 Selections of power equipment and wiring of power supply system
8.1 Selection regulations of power supply equipment
8.2 Selections of power supply equipment
8.3 Wiring of power supply system
Explanation of wording in this Specification
