This regulation applies to the power supply design of newly built or expanded large and medium-sized chemical enterprises or devices, including: power load classification and power supply and distribution. HG/T 20664-1999 Technical Regulations for Power Supply Design of Chemical Enterprises (with clause explanation) HG/T20664-1999 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
HG/T 20664-1999
Technical Specification for Power Supply Design Engineering for Chemical Enterprises
12 - 10
State Bureau of Petroleum and Chemical Industry
2000 - 04 - 01
Document of State Bureau of Petroleum and Chemical Industry
State Petrochemical Government (1999) No. 517
Notice on Approval of 25 Chemical Industry Standards Including "Classification and Technical Conditions for Stainless Steel Manholes" China Chemical Exploration and Design Association:
FTYKAONTKAca
The draft of 25 chemical industry standards including "Classification and Technical Conditions for Stainless Steel Manholes" submitted by your association for approval has been approved by our bureau and is now published. Whose name and number are mandatory standards
Standard number
HG 21591-1999
HG 21595—1999
HG 21596-1999
HG 21597—1999
HG 21598. 1999
HG 21599—1999
HG 21600.: 1999
HG 21601—1999
HG 21602-1999
HG 21603-1999
HG 21604 - 1999
Recommended standard
HG/T 20579.1—1999
HG/T 20579.2-1999
HG/T 20579. 3 1999
Standard name
Classification and technical conditions of stainless steel manholes and handholes (replace HGJ50386 normal pressure stainless steel manhole (replace HG) 504-86) stainless steel manhole with rotating cover (replace HG1505-86) stainless steel manhole with rotating arch cover and quick opening (replace HG505-86) stainless steel manhole with horizontal hanging cover (replace HG507-86) stainless steel manhole with vertical hanging cover (replace HGJ508-86) elliptical quick opening Stainless steel manhole (replace IGJ509-86) Normal pressure quick opening stainless steel hand hole (replace HGJ510-86) Flat cover stainless steel hand hole (replace HG) 511-86) Rotary cover quick opening stainless steel manhole (replace FIGJ512-86) Rotary handle quick opening stainless steel hand (replace HG513-86) Process equipment model design regulations (replace CD13A1-86) Process equipment pipeline model quality acceptance standard model design reduced product packaging and transportation technical regulations HG:T 20661-1999
HG/T 20662- 1999
HG/T20663-1999
HG/1 20664-1999
HG/T 20665-1999
HG/T 22811- 1999
HG/T 2 0666-1999
HG/T20646--1999
HG/T 21629—1999
HG/T 20696- 1999
Technical conditions for the construction of acid boiling furnace
Technical regulations for the design of mechanical conveying of chemical powder materials
Design regulations for the quantity, packaging and stacking system of chemical powder and granular productsTechnical regulations for the design of power supply for chemical enterprises (replacing CD 90A5-85)Classification standard for the anti-fouling protection of chemical buildings and structuresDesign specification for mine shaft and tunnel engineering sections
Code for power supply design in corrosive environment for chemical enterprises (replacing CD90A6-85)Design regulations for piping materials of chemical plants
Pipe rack drawing (replacing HJ524:91)
Design regulations for glass fiber reinforced plastic chemical equipment
The above standards shall be implemented from April 1, 2000, and the replaced standards shall be abolished at the same timeState Bureau of Petroleum and Chemical Industry
On December 10, 1999
China Chemical Exploration and Design Association Notice of the National Chemical Engineering Construction Standards Editing Center: TYKAoNiKAca
Notice of the State Administration of Petroleum and Chemical Industry on the Approval of 25 Chemical Industry Standards, including "Classification and Technical Conditions for Stainless Steel Manholes and Handholes" China Petrochemical Administration (1999) No. 517 approved the 25 chemical industry standards organized by our association (the approval document is attached) After research, these 25 chemical industry standards are entrusted to your center to be responsible for the compilation, publication and distribution. Attachment: Notice on the approval of 25 chemical industry standards, including "Classification and Technical Conditions for Stainless Steel Manholes and Handholes". China Chemical Engineering Exploration and Design Association
January 30, 200-1
Industry Standards of the People's Republic of China
Specification of Power Supply Design Engineeringrringfor Chemical Enterprises
Specification of Power Supply Design Engineeringrringfor Chemical Enterprises
HG/T20664—1999
Compiled by: China Chengda Chemical Engineering Company Approved by: State Petroleum and Chemical Industry Bureau Implementation date: April 2, 2000
National Chemical Engineering Construction Standard Editing Center (formerly the Engineering Construction Standard Editing Center of the Ministry of Chemical Industry) 2000 Beijing
TYKANiTKAca-
This technical regulation is based on the "Chemical Construction Standard (1995) No. 33 document issued by the former Construction Coordination Department of the Ministry of Chemical Industry" Notice on the Basic Design Work Plan for 1995, China Chengda Chemical Engineering Co., Ltd. (formerly the Eighth Design Institute of the Ministry of Chemical Industry) is responsible for revising the Technical Regulations for Power Supply Design of Chemical Enterprises (CD90A5-85). During the revision process, the compilation team, based on the summary of Xie's investigation, combined with the relevant national standards and industry standards for electricity promulgated in recent years, widely solicited opinions from major chemical, petrochemical, rubber, pharmaceutical and other design units in China, and strived to move closer to the International Electrotechnical Commission (IEC) standards. The main contents of this revision are as follows! ||tt| |According to the requirements of the "Regulations on the Preparation of Chemical Industry Engineering Construction Standards" issued by the former Ministry of Chemical Industry in 1997, the second chapter of \terms, symbols and codes\ is added.
The reference load is divided into one, two and three levels of load, and "loads with special power supply requirements" are proposed, but they do not exist independently as a load.
◆The technical requirements for the wiring of self-provided power stations and the wiring of self-use power stations are added. The computer room, IS room, maintenance-free and cadmium nickel battery DC power supply are added. The illumination, isolating switches and their opening and closing currents are deleted. This technical regulation is in the implementation process. If you find any need for modification or supplement, please send your comments and relevant information to the "Technical Regulations for Power Supply Design of Chemical Enterprises" Preparation Group of China Chengda Chemical Engineering Co., Ltd. (Address: No. 28, Section 4, Renmin South Road, Chengbu, Postal Code 60041) and copy it to the National Chemical Electrical Design Technology Center for reference in future revisions. This regulation is organized and reviewed by the National Chemical Electrical Design Technology Center. Main drafters: Zheng Zheng, Chen Kecheng, Miao Jiguo, Sun Zhencheng, Ren Songbai, Sun Yuanming, Jin Guozong, 2 Terms, symbols, and codes. 2.1 Terminology
2.2 Symbols
23 Code
Power supply scheme
Load level and power supply
4.1 Load level
, power supply for level II and III loads
4.3 Power supply for loads with special power supply requirements Power supply
Regional power supply and power supply line
Self-provided power station
DC power supply
5.4 Static uninterruptible power supply (UPS
5.5 Diesel generator set for emergency power supply
Power supply system
Electrical wiring of power supply system
6.2 Electrical wiring of self-provided power station
6.3 Selection and adjustment of power supply voltage
6.4 Reactive power compensation
(. 5 Neutral point grounding method and arc suppression line diagram Main substation, main distribution device
Ning.1 Main substation and main distribution device location selection Power transformer selection
Equipment selection
General provisions of transformer and distribution device...
Outdoor distribution device
. See indoor distribution equipment and control room
Architecture and HVAC
7.9 Noise prevention and immunity
Appendix A Explanation of terms used
Appendix B
Main references and references
Article explanation
(5)
(7)
(12)
(20)
TYKAoNiiKAca
1.0. In order to make the power supply design of chemical, petrochemical, rubber, pharmaceutical and other chemical enterprises comply with the national technical and economic policies, ensure personal safety, reliable power supply, advanced technology, economic rationality, and convenient installation and maintenance, these regulations are specially formulated. 1.0.2 These regulations apply to the power supply design of newly built or expanded large and medium-sized chemical enterprises or devices, including: power load classification and its power supply and distribution. Small chemical enterprises may also refer to these regulations for implementation. 1..3 In addition to implementing these regulations, the power supply design shall also comply with the provisions of the relevant national standards and specifications currently in force. 2 Terms, symbols, and codes
2.1 Unknown bzxz.net
-Major equipment: equipment that can control the entire process of chemical products, that is, equipment that has a decisive impact on the benefits and survival of chemical enterprises.
-Main equipment: equipment that can affect the continuous operation of the process of chemical products.
-Buffer equipment: refers to storage equipment with considerable capacity set between two stages of chemical process.
-Enterprise scale: refers to the size of the annual production capacity of the enterprise.
-Highest load level: refers to the load level with the highest importance in the device or enterprise.
-Power line: refers to the overhead or cable line for power supply between enterprises.
-Self-provided power station: refers to a power generation device that utilizes the thermal energy of the enterprise and has a complete system and independent blocks: the power supply is mainly based on the busbar of the main substation of the enterprise.
-Self-provided generator: refers to the waste heat power generation equipment of the chemical device, which is connected to the distribution busbar of the device and supplies power to the device.
一Determined power by steam: refers to the power generation capacity determined by the surplus amount of steam thermal energy in the enterprise, an emergency power supply system: refers to a power supply system that is connected to emergency power supply and normal operating power supply, and also supplies power to loads with special power supply requirements.
2.2 Symbols
Battery capacity calculated according to continuous discharge capacity conditions (A·h): Replacement battery capacity calculated according to impulse current conditions (A·h); High-voltage fuse plus vacuum contactor;
The synthetic magnetic field strength of the AC three-phase bus in the atmosphere (Am): The allowable value of the first harmonic current injected into the power grid by users (A);-The peak value of the closing inrush current of the parallel capacitor (kV): Battery discharge rate:
一Harmonic order;
——Diesel engine rated capacity (hP)
Diesel generator capacity (kw);
.-Capacitor capacity (kVar)
-Capacitor with harmonics Capacity (kVar): R.
--direct grounding resistance (k) that limits single-phase gap grounding overvoltage; SF
Sulphur dioxide;
St1--diesel generator set capacity (kVA) calculated according to stable loadTYKANKAca
S--: diesel generator set capacity (kVA) calculated according to the condition of the largest single motor or group of motors started last;
: diesel generator set capacity (KVA) calculated according to the condition of busbar allowable voltage failure when starting the motor: Skc minimum short-circuit capacity of the power grid (MVA);
Basic short-circuit capacity (MVA) of the power grid used for calculation-fault time (s).
2.3 Code
Uninterrupted power supply static AC uninterruptible power supply device; SF, gas insulated metal-enclosed switchgears fully enclosed sulfur hexafluoride combination electrical appliances; Distributed control system. 3
3.0.1 Basic requirements for power supply scheme:
3 Power supply scheme
1 The main power supply line should be simple and reliable, safe to operate, flexible to operate and convenient to maintain; 2 Economic and reasonable, save electricity, and strive to reduce investment (including infrastructure investment and subsidies) and reduce operating costs (including basic electricity charges and local electricity charges) and save medicine and land:
3 Meet the requirements of the recent (510) development plan 4 Reasonably select electrical products with advanced technology and reliable operation; 5 Meet the construction progress requirements of the enterprise,
-Generally, it is advisable to propose two power supply schemes, compare the technical and economic travel, and recommend the best one. 3.0.2 The main work content of the power supply scheme design stage: The power supply scheme should be determined based on the nature and scale of the enterprise, the enterprise's requirements for power supply reliability, the enterprise's power supply voltage level, the situation of the local power grid, the local natural conditions, the enterprise's general layout, and the enterprise's recent development plan.
1 Participate in site selection:
2 Investigate the situation of the regional power grid and its conditions for supplying power to the enterprise: 3 Load classification and load calculation of the whole plant!
4 When the enterprise has surplus heat energy for comprehensive utilization, it is necessary to study whether to set up a standby power station and its actual plan in conjunction with relevant professionals. Including power generation scale, unit selection, electrical main connection, etc.: 5 Negotiate power supply plans with local power departments, and after obtaining approval from the superior power department, assist the owner to sign a power supply agreement or letter of intent with the local power department: including the number of power supply circuits, power supply voltage level and power supply quality, communication plan with the power system, connection between the enterprise relay protection equipment and the power system, and the location of the electricity metering equipment: 6 Determine the whole! The main power supply connection scheme, the location of the main substation and the self-provided power station, and the inlet and outlet lines of the enterprise's power supply and distribution corridor
7 Draw several single-line diagrams of power supply schemes for selection: 8 Make technical and economic comparisons of the power supply schemes: 9 Prepare design documents.
4 Load level and power supply
4.1 Load level
TTYKAONTKACa
4.1.1 According to the importance of the power load in the continuous production process of the chemical industry, and in accordance with its requirements for power supply reliability and continuity, the chemical power load is divided into three levels: primary load, secondary load and tertiary load. In chemical production, there are also some loads with special power supply requirements. 4.1.2: Class-1 load-When the normal working power supply of the enterprise is suddenly interrupted, the continuous production of the enterprise is disrupted, which makes the When major equipment is damaged, it takes a long time to resume production after power is restored, which causes major products to be scrapped and products produced with important raw materials to be over-produced, causing major economic losses to key enterprises. 4.1.3 Secondary load: When the normal working power supply of an enterprise is suddenly interrupted, the continuous production process of the enterprise is disrupted, causing major equipment to be damaged, and it takes a long time to resume production after power is restored. Products are over-produced and production is reduced, causing major economic losses to key enterprises.
Usually large and medium-sized chemical enterprises are key enterprises with this third-level load. 4. 1.4 Level 3 loads - All loads that do not belong to level 1 or 2 (including loads with special power supply requirements) should be level 3 loads.
4.1.5 Loads with special power supply requirements - When the normal working power supply of an enterprise is suddenly interrupted due to a fault or the normal working power supply is manually cut off due to a fire, in order to ensure safe shutdown, avoid explosions and fire spread, poisoning and personal injury, or once such accidents occur, timely handle the accidents and prevent the accidents from expanding, and rescue and evacuate personnel: loads that must be powered.
Loads with special power supply requirements in enterprises under the current situation usually include the following types of loads that will cause explosions and material leakage when the power supply is cut off: (1) Safety shutdown automatic program control devices (instruments, relays, program controllers, etc.) and their actuators (such as feed valves, discharge valves, drain valves, etc.), as well as supporting disposal facilities; (2) Equipment with undischargeable materials; (3) Equipment with undischargeable materials; (4) Equipment with undischargeable materials; (5) Equipment with undischargeable materials; (6) Equipment with undischargeable materials; (7) Equipment with undischargeable materials; (8) Equipment with undischargeable materials; (9) Equipment with undischargeable materials; (10) Equipment with undischargeable materials; (11) Equipment with undischargeable materials; (12) Equipment with undischargeable materials; (13) Equipment with undischargeable materials; (14) Equipment with undischargeable materials; (15) Equipment with undischargeable materials; (16) Equipment with undischargeable materials; (17) Equipment with undischargeable materials; (18) Equipment with undischargeable materials; (19) Equipment with undischargeable materials; (20) Equipment with undischargeable materials; (21) Equipment with undischargeable materials; (22) Equipment with undischargeable materials; (23) Equipment with undischargeable materials; (24) Equipment with undischargeable materials; ( (1) The mixing facilities and the discharging facilities or the cooling water supply equipment required to avoid dangerous consequences when localized and large-scale exothermic reactions occur; (2) The electrical equipment such as the safety shaft seal and positive pressure ventilation system of the large compressor units used for explosive and dangerous materials; (3) The power load of the accident lighting, communication system, fire alarm equipment, fire protection system, etc. required for on-site accident handling, rescue and evacuation of personnel when the power supply is interrupted. 3. The power load of the IXCS, electrical microcomputer protection, monitoring and management system for chemical process control. The load with special power supply requirements shall be included in the highest load level of the device or enterprise. 4.2 Power supply for the first, second and third level loads
4.2.1 Level loads shall be powered by two power supplies. When using overhead lines, they should not be laid on the same pole. 4.2.2 Level 2 loads shall be powered by double-circuit power lines. When the load is small and it is very difficult to obtain a double-circuit power supply, 5In order to ensure that the power supply design of chemical, petrochemical, rubber, pharmaceutical and other chemical enterprises complies with the national technical and economic policies, ensure personal safety, reliable power supply, advanced technology, economic rationality, and convenient installation and maintenance, these regulations are specially formulated. 1.0.2 These regulations apply to the power supply design of newly built or expanded large and medium-sized chemical enterprises or devices, including: power load classification and power supply and distribution. Small chemical enterprises can also refer to these regulations for implementation. 1..3 In addition to implementing these regulations, the power supply design should also comply with the provisions of the relevant current national standards and specifications. 2 Terms, symbols, codes
2.1 Unknown
-Major equipment: equipment that can control the entire process of chemical products, that is, equipment that has a decisive impact on the benefits and survival of chemical enterprises.
-Main equipment: equipment that can affect the continuous operation of the process of chemical products. 1. Buffer equipment: refers to storage equipment with considerable capacity set between two stages of chemical process. 1. Enterprise scale: refers to the size of the annual production capacity of the enterprise. 》Highest load level: refers to the load level with the highest importance in the device or enterprise. 一Power line: refers to the overhead or cable line for power supply between enterprises. 一Self-contained power station: refers to the power generation device that utilizes the thermal energy of the enterprise and has a complete system and independent blocks: the power supply is mainly supplied by the busbar of the main substation of the enterprise.
一Self-contained generator: refers to the waste heat power generation equipment of the chemical device, which is connected to the power distribution busbar of the device and supplies power to the device.
一Electricity determined by steam: refers to the power generation capacity determined by the surplus amount of steam thermal energy of the enterprise. 一Emergency power supply system: refers to the power supply system that is connected to the emergency power supply and the normal operating power supply, and also supplies power to the load with special power supply requirements.
2.2 Symbols
Battery capacity calculated under continuous discharge capacity conditions (A·h): Battery capacity calculated under impulse current conditions (A·h); High-voltage fuse plus vacuum contactor;
Synthetic magnetic field strength of AC three-phase bus in the atmosphere (Am): Allowable value of first harmonic current injected into the grid by users (A); Peak value of inrush current of parallel capacitor upon closing the switch (kV): Battery discharge rate:
- Harmonic order;
- Diesel engine capacity (hP)
Diesel generator capacity (kw);
.- Capacitor capacity (kVar)
- Capacitor with harmonic current (kVar) Capacity (kVar): R.
--direct grounding resistance (k) that limits single-phase gap grounding overvoltage; SF
Sulphur dioxide;
St1--diesel generator set capacity (kVA) calculated according to stable loadTYKANKAca
S--: diesel generator set capacity (kVA) calculated according to the condition of the largest single motor or group of motors started last;
: diesel generator set capacity (KVA) calculated according to the condition of busbar allowable voltage failure when starting the motor: Skc minimum short-circuit capacity of the power grid (MVA);
Basic short-circuit capacity (MVA) of the power grid used for calculation-fault time (s).
2.3 Code
Uninterruptedpowersupply static AC uninterruptible power supply device; SF, gas insulated metal-enclosed switchgears fully enclosed sulfur hexafluoride combination electrical appliances; Distributedcontrolsystem distributed control system. 3
3.0.1 Basic requirements for power supply scheme:
3 Power supply scheme
1 The main power supply line should be simple and reliable, safe to operate, flexible to operate and convenient to maintain; 2 Economic and reasonable, save electricity, and strive to reduce investment (including infrastructure investment and subsidies) and reduce operating costs (including basic electricity charges and local electricity charges) and save medicine and land:
3 Meet the requirements of the recent (510) development plan 4 Reasonably select electrical products with advanced technology and reliable operation; 5 Meet the construction progress requirements of the enterprise,
-Generally, it is advisable to propose two power supply schemes, compare the technical and economic travel, and recommend the best one. 3.0.2 The main work content of the power supply scheme design stage: The power supply scheme should be determined based on the nature and scale of the enterprise, the enterprise's requirements for power supply reliability, the enterprise's power supply voltage level, the situation of the local power grid, the local natural conditions, the enterprise's general layout, and the enterprise's recent development plan.
1 Participate in site selection:
2 Investigate the situation of the regional power grid and its conditions for supplying power to the enterprise: 3 Load classification and load calculation of the whole plant!
4 When the enterprise has surplus heat energy for comprehensive utilization, it is necessary to study whether to set up a standby power station and its actual plan in conjunction with relevant professionals. Including power generation scale, unit selection, electrical main connection, etc.: 5 Negotiate power supply plans with local power departments, and after obtaining approval from the superior power department, assist the owner to sign a power supply agreement or letter of intent with the local power department: including the number of power supply circuits, power supply voltage level and power supply quality, communication plan with the power system, connection between the enterprise relay protection equipment and the power system, and the location of the electricity metering equipment: 6 Determine the whole! The main power supply connection scheme, the location of the main substation and the self-provided power station, and the incoming and outgoing lines of the enterprise's power supply and distribution corridors
7 Draw several single-line diagrams of power supply schemes for selection: 8 Make technical and economic comparisons of the power supply schemes: 9 Prepare design documents.
4 Load level and power supply
4.1 Load level
TTYKAONTKACa
4.1.1 According to the importance of the power load in the continuous production process of the chemical industry, and in accordance with its requirements for power supply reliability and continuity, the chemical power load is divided into three levels: primary load, secondary load and tertiary load. In chemical production, there are also some loads with special power supply requirements. 4.1.2: Class-1 load - when the normal working power supply of the enterprise is suddenly interrupted, the continuous production of the enterprise is disrupted, which makes the When major equipment is damaged, it takes a long time to resume production after power is restored, which causes major products to be scrapped and products produced with important raw materials to be over-produced, causing major economic losses to key enterprises. 4.1.3 Secondary load: When the normal working power supply of an enterprise is suddenly interrupted, the continuous production process of the enterprise is disrupted, causing major equipment to be damaged, and it takes a long time to resume production after power is restored. Products are over-produced and production is reduced, causing major economic losses to key enterprises.
Usually large and medium-sized chemical enterprises are key enterprises with this third-level load. 4. 1.4 Level 3 loads - all loads that do not belong to level 1 or 2 (including loads with special power supply requirements) should be level 3 loads.
4.1.5 Loads with special power supply requirements - when the normal working power supply of an enterprise is suddenly interrupted due to a fault or the normal working power supply is manually cut off due to a fire, in order to ensure safe shutdown, avoid explosions and fire spread, poisoning and personal injury, or once such accidents occur, timely handle the accidents and prevent the accidents from expanding, and rescue and evacuate personnel, the loads that must be powered on.
Loads with special power supply requirements in enterprises under the current situation usually include the following types of loads that will cause explosions and material leakage when the power supply is cut off: (1) Safety shutdown automatic program control devices (instruments, relays, program controllers, etc.) and their actuators (such as feed valves, discharge valves, drain valves, etc.), as well as supporting disposal facilities; (2) Equipment with undischargeable materials; (3) Equipment with undischargeable materials; (4) Equipment with undischargeable materials; (5) Equipment with undischargeable materials; (6) Equipment with undischargeable materials; (7) Equipment with undischargeable materials; (8) Equipment with undischargeable materials; (9) Equipment with undischargeable materials; (10) Equipment with undischargeable materials; (11) Equipment with undischargeable materials; (12) Equipment with undischargeable materials; (13) Equipment with undischargeable materials; (14) Equipment with undischargeable materials; (15) Equipment with undischargeable materials; (16) Equipment with undischargeable materials; (17) Equipment with undischargeable materials; (18) Equipment with undischargeable materials; (19) Equipment with undischargeable materials; (20) Equipment with undischargeable materials; (21) Equipment with undischargeable materials; (22) Equipment with undischargeable materials; (23) Equipment with undischargeable materials; (24) Equipment with undischargeable materials (1) The mixing facilities and the discharging facilities or the cooling water supply equipment required to avoid dangerous consequences when localized and large-scale exothermic reactions occur; (2) The electrical equipment such as the safety shaft seal and positive pressure ventilation system of the large compressor units used for explosive and dangerous materials; (3) The power load of the accident lighting, communication system, fire alarm equipment, fire fighting system, etc. required for on-site accident handling, rescue and evacuation of personnel when the power supply is interrupted. 3. The power load of the IXCS, electrical microcomputer protection, monitoring and management system for chemical process control. The load with special power supply requirements shall be included in the highest load level of the device or enterprise. 4.2 Power supply for the first, second and third level loads
4.2.1 Level loads shall be powered by two power supplies. When using overhead lines, they should not be laid on the same pole. 4.2.2 Level 2 loads shall be powered by double-circuit power lines. When the load is small and it is very difficult to obtain a double-circuit power supply, 5In order to ensure that the power supply design of chemical, petrochemical, rubber, pharmaceutical and other chemical enterprises complies with the national technical and economic policies, ensure personal safety, reliable power supply, advanced technology, economic rationality, and convenient installation and maintenance, these regulations are specially formulated. 1.0.2 These regulations apply to the power supply design of newly built or expanded large and medium-sized chemical enterprises or devices, including: power load classification and power supply and distribution. Small chemical enterprises can also refer to these regulations for implementation. 1..3 In addition to implementing these regulations, the power supply design should also comply with the provisions of the relevant current national standards and specifications. 2 Terms, symbols, codes
2.1 Unknown
-Major equipment: equipment that can control the entire process of chemical products, that is, equipment that has a decisive impact on the benefits and survival of chemical enterprises.
-Main equipment: equipment that can affect the continuous operation of the process of chemical products. 1. Buffer equipment: refers to storage equipment with considerable capacity set between two stages of chemical process. 1. Enterprise scale: refers to the size of the annual production capacity of the enterprise. 》Highest load level: refers to the load level with the highest importance in the device or enterprise. 一Power line: refers to the overhead or cable line for power supply between enterprises. 一Self-contained power station: refers to the power generation device that utilizes the thermal energy of the enterprise and has a complete system and independent blocks: the power supply is mainly supplied by the busbar of the main substation of the enterprise.
一Self-contained generator: refers to the waste heat power generation equipment of the chemical device, which is connected to the power distribution busbar of the device and supplies power to the device.
一Electricity determined by steam: refers to the power generation capacity determined by the surplus amount of steam thermal energy of the enterprise. 一Emergency power supply system: refers to the power supply system that is connected to the emergency power supply and the normal operating power supply, and also supplies power to the load with special power supply requirements.
2.2 Symbols
Battery capacity calculated under continuous discharge capacity conditions (A·h): Battery capacity calculated under impulse current conditions (A·h); High-voltage fuse plus vacuum contactor;
Synthetic magnetic field strength of AC three-phase bus in the atmosphere (Am): Allowable value of first harmonic current injected into the grid by users (A); Peak value of inrush current of parallel capacitor upon closing the switch (kV): Battery discharge rate:
- Harmonic order;
- Diesel engine capacity (hP)
Diesel generator capacity (kw);
.- Capacitor capacity (kVar)
- Capacitor with harmonic current (kVar) Capacity (kVar): R.
--direct grounding resistance (k) that limits single-phase gap grounding overvoltage; SF
Sulphur dioxide;
St1--diesel generator set capacity (kVA) calculated according to stable loadTYKANKAca
S--: diesel generator set capacity (kVA) calculated according to the condition of the largest single motor or group of motors started last;
: diesel generator set capacity (KVA) calculated according to the condition of busbar allowable voltage failure when starting the motor: Skc minimum short-circuit capacity of the power grid (MVA);
Basic short-circuit capacity (MVA) of the power grid used for calculation-fault time (s).
2.3 Code
Uninterruptedpowersupply static AC uninterruptible power supply device; SF, gas insulated metal-enclosed switchgears fully enclosed sulfur hexafluoride combination electrical appliances; Distributedcontrolsystem distributed control system. 3
3.0.1 Basic requirements for power supply scheme:
3 Power supply scheme
1 The main power supply line should be simple and reliable, safe to operate, flexible to operate and convenient to maintain; 2 Economic and reasonable, save electricity, and strive to reduce investment (including infrastructure investment and subsidies) and reduce operating costs (including basic electricity charges and local electricity charges) and save medicine and land:
3 Meet the requirements of the recent (510) development plan 4 Reasonably select electrical products with advanced technology and reliable operation; 5 Meet the construction progress requirements of the enterprise,
-Generally, it is advisable to propose two power supply schemes, compare the technical and economic travel, and recommend the best one. 3.0.2 The main work content of the power supply scheme design stage: The power supply scheme should be determined based on the nature and scale of the enterprise, the enterprise's requirements for power supply reliability, the enterprise's power supply voltage level, the situation of the local power grid, the local natural conditions, the enterprise's general layout, and the enterprise's recent development plan.
1 Participate in site selection:
2 Investigate the situation of the regional power grid and its conditions for supplying power to the enterprise: 3 Load classification and load calculation of the whole plant!
4 When the enterprise has surplus heat energy for comprehensive utilization, it is necessary to study whether to set up a standby power station and its actual plan in conjunction with relevant professionals. Including power generation scale, unit selection, electrical main connection, etc.: 5 Negotiate power supply plans with local power departments, and after obtaining approval from the superior power department, assist the owner to sign a power supply agreement or letter of intent with the local power department: including the number of power supply circuits, power supply voltage level and power supply quality, communication plan with the power system, connection between the enterprise relay protection equipment and the power system, and the location of the electricity metering equipment: 6 Determine the whole! The main power supply connection scheme, the location of the main substation and the self-provided power station, and the incoming and outgoing lines of the enterprise's power supply and distribution corridors
7 Draw several single-line diagrams of power supply schemes for selection: 8 Make technical and economic comparisons of the power supply schemes: 9 Prepare design documents.
4 Load level and power supply
4.1 Load level
TTYKAONTKACa
4.1.1 According to the importance of the power load in the continuous production process of the chemical industry, and in accordance with its requirements for power supply reliability and continuity, the chemical power load is divided into three levels: primary load, secondary load and tertiary load. In chemical production, there are also some loads with special power supply requirements. 4.1.2: Class-1 load - when the normal working power supply of the enterprise is suddenly interrupted, the continuous production of the enterprise is disrupted, which makes the When major equipment is damaged, it takes a long time to resume production after power is restored, which causes major products to be scrapped and products produced with important raw materials to be over-produced, causing major economic losses to key enterprises. 4.1.3 Secondary load: When the normal working power supply of an enterprise is suddenly interrupted, the continuous production process of the enterprise is disrupted, causing major equipment to be damaged, and it takes a long time to resume production after power is restored. Products are over-produced and production is reduced, causing major economic losses to key enterprises.
Usually large and medium-sized chemical enterprises are key enterprises with this third-level load. 4. 1.4 Level 3 loads - All loads that do not belong to level 1 or 2 (including loads with special power supply requirements) should be level 3 loads.
4.1.5 Loads with special power supply requirements - When the normal working power supply of an enterprise is suddenly interrupted due to a fault or the normal working power supply is manually cut off due to a fire, in order to ensure safe shutdown, avoid explosions and fire spread, poisoning and personal injury, or once such accidents occur, timely handle the accidents and prevent the accidents from expanding, and rescue and evacuate personnel: loads that must be powered.
Loads with special power supply requirements in enterprises under the current situation usually include the following types of loads that will cause explosions and material leakage when the power supply is cut off: (1) Safety shutdown automatic program control devices (instruments, relays, program controllers, etc.) and their actuators (such as feed valves, discharge valves, drain valves, etc.), as well as supporting disposal facilities; (2) Equipment with undischargeable materials; (3) Equipment with undischargeable materials; (4) Equipment with undischargeable materials; (5) Equipment with undischargeable materials; (6) Equipment with undischargeable materials; (7) Equipment with undischargeable materials; (8) Equipment with undischargeable materials; (9) Equipment with undischargeable materials; (10) Equipment with undischargeable materials; (11) Equipment with undischargeable materials; (12) Equipment with undischargeable materials; (13) Equipment with undischargeable materials; (14) Equipment with undischargeable materials; (15) Equipment with undischargeable materials; (16) Equipment with undischargeable materials; (17) Equipment with undischargeable materials; (18) Equipment with undischargeable materials; (19) Equipment with undischargeable materials; (20) Equipment with undischargeable materials; (21) Equipment with undischargeable materials; (22) Equipment with undischargeable materials; (23) Equipment with undischargeable materials; (24) Equipment with undischargeable materials; ( (1) The mixing facilities and the discharging facilities or the cooling water supply equipment required to avoid dangerous consequences when localized and large-scale exothermic reactions occur; (2) The electrical equipment such as the safety shaft seal and positive pressure ventilation system of the large compressor units used for explosive and dangerous materials; (3) The power load of the accident lighting, communication system, fire alarm equipment, fire protection system, etc. required for on-site accident handling, rescue and evacuation of personnel when the power supply is interrupted. 3. The power load of the IXCS, electrical microcomputer protection, monitoring and management system for chemical process control. The load with special power supply requirements shall be included in the highest load level of the device or enterprise. 4.2 Power supply for the first, second and third level loads
4.2.1 Level loads shall be powered by two power supplies. When using overhead lines, they should not be laid on the same pole. 4.2.2 Level 2 loads shall be powered by double-circuit power lines. When the load is small and it is very difficult to obtain a double-circuit power supply, 51.
-Major equipment: equipment that can control the entire process of chemical products, that is, equipment that has a decisive impact on the benefits and survival of chemical enterprises.
-Main equipment: equipment that can affect the continuous operation of the process of chemical products.
-Buffer equipment: refers to storage equipment with considerable capacity set between two stages of chemical process.
-Enterprise scale: refers to the size of the annual production capacity of the enterprise.
-Highest load level: refers to the load level with the highest importance in the device or enterprise.
-Power line: refers to the overhead or cable line for power supply between enterprises.
-Self-provided power station: refers to a power generation device that uses the thermal energy of the enterprise and has a complete system and independent blocks: the main power supply is from the busbar of the main substation of the enterprise.
-Self-provided generator: refers to the waste heat power generation equipment of the chemical device, which is connected to the power distribution busbar of the device and supplies power to the device.
一Determined power by steam: refers to the power generation capacity determined by the surplus amount of steam thermal energy in the enterprise, an emergency power supply system: refers to a power supply system that is connected to emergency power supply and normal operating power supply, and also supplies power to loads with special power supply requirements.
2.2 Symbols
Battery capacity calculated according to continuous discharge capacity conditions (A·h): Replacement battery capacity calculated according to impulse current conditions (A·h); High-voltage fuse plus vacuum contactor;
The synthetic magnetic field strength of the AC three-phase bus in the atmosphere (Am): The allowable value of the first harmonic current injected into the power grid by users (A);-The peak value of the closing inrush current of the parallel capacitor (kV): Battery discharge rate:
一Harmonic order;
——Diesel engine rated capacity (hP)
Diesel generator capacity (kw);
.-Capacitor capacity (kVar)
-Capacitor with harmonics Capacity (kVar): R.
--direct grounding resistance (k) that limits single-phase gap grounding overvoltage; SF
Sulphur dioxide;
St1--diesel generator set capacity (kVA) calculated according to stable loadTYKANKAca
S--: diesel generator set capacity (kVA) calculated according to the condition of the largest single motor or group of motors started last;
: diesel generator set capacity (KVA) calculated according to the condition of busbar allowable voltage failure when starting the motor: Skc minimum short-circuit capacity of the power grid (MVA);
Battery short-circuit capacity (MVA) of the power grid used for calculation-fault time (s).
2.3 Code
Uninterruptedpowersupply static AC uninterruptible power supply device; SF, gas insulated metal-enclosed switchgears fully enclosed sulfur hexafluoride combination electrical appliances; Distributedcontrolsystem distributed control system. 3
3.0.1 Basic requirements for power supply scheme:
3 Power supply scheme
1 The main power supply line should be simple and reliable, safe to operate, flexible to operate and convenient to maintain; 2 Economic and reasonable, save electricity, and strive to reduce investment (including infrastructure investment and subsidies) and reduce operating costs (including basic electricity charges and local electricity charges) and save medicine and land:
3 Meet the requirements of the recent (510) development plan 4 Reasonably select electrical products with advanced technology and reliable operation; 5 Meet the construction progress requirements of the enterprise,
-Generally, it is advisable to propose two power supply schemes, compare the technical and economic travel, and recommend the best one. 3.0.2 The main work content of the power supply scheme design stage: The power supply scheme should be determined based on the nature and scale of the enterprise, the enterprise's requirements for power supply reliability, the enterprise's power supply voltage level, the situation of the local power grid, the local natural conditions, the enterprise's general layout, and the enterprise's recent development plan.
1 Participate in site selection:
2 Investigate the situation of the regional power grid and its conditions for supplying power to the enterprise: 3 Load classification and load calculation of the whole plant!
4 When the enterprise has surplus heat energy for comprehensive utilization, it is necessary to study whether to set up a standby power station and its actual plan in conjunction with relevant professionals. Including power generation scale, unit selection, electrical main connection, etc.: 5 Negotiate power supply plans with local power departments, and after obtaining approval from the superior power department, assist the owner to sign a power supply agreement or letter of intent with the local power department: including the number of power supply circuits, power supply voltage level and power supply quality, communication plan with the power system, connection between the enterprise relay protection equipment and the power system, and the location of the electricity metering equipment: 6 Determine the whole! The main power supply connection scheme, the location of the main substation and the self-provided power station, and the inlet and outlet lines of the enterprise's power supply and distribution corridor
7 Draw several single-line diagrams of power supply schemes for selection: 8 Make technical and economic comparisons of the power supply schemes: 9 Prepare design documents.
4 Load level and power supply
4.1 Load level
TTYKAONTKACa
4.1.1 According to the importance of the power load in the continuous production process of the chemical industry, and in accordance with its requirements for power supply reliability and continuity, the chemical power load is divided into three levels: primary load, secondary load and tertiary load. In chemical production, there are also some loads with special power supply requirements. 4.1.2: Class-1 load-When the normal working power supply of the enterprise is suddenly interrupted, the continuous production of the enterprise is disrupted, which makes the When major equipment is damaged, it takes a long time to resume production after power is restored, which causes major products to be scrapped and products produced with important raw materials to be over-produced, causing major economic losses to key enterprises. 4.1.3 Secondary load: When the normal working power supply of an enterprise is suddenly interrupted, the continuous production process of the enterprise is disrupted, causing major equipment to be damaged, and it takes a long time to resume production after power is restored. Products are over-produced and production is reduced, causing major economic losses to key enterprises.
Usually large and medium-sized chemical enterprises are key enterprises with this third-level load. 4. 1.4 Level 3 loads - all loads that do not belong to level 1 or 2 (including loads with special power supply requirements) should be level 3 loads.
4.1.5 Loads with special power supply requirements - when the normal working power supply of an enterprise is suddenly interrupted due to a fault or the normal working power supply is manually cut off due to a fire, in order to ensure safe shutdown, avoid explosions and fire spread, poisoning and personal injury, or once such accidents occur, timely handle the accidents and prevent the accidents from expanding, and rescue and evacuate personnel, the loads that must be powered on.
Loads with special power supply requirements in enterprises under the current situation usually include the following types of loads that will cause explosions and material leakage when the power supply is cut off: (1) Safety shutdown automatic program control devices (instruments, relays, program controllers, etc.) and their actuators (such as feed valves, discharge valves, drain valves, etc.), as well as supporting disposal facilities; (2) Equipment with undischargeable materials; (3) Equipment with undischargeable materials; (4) Equipment with undischargeable materials; (5) Equipment with undischargeable materials; (6) Equipment with undischargeable materials; (7) Equipment with undischargeable materials; (8) Equipment with undischargeable materials; (9) Equipment with undischargeable materials; (10) Equipment with undischargeable materials; (11) Equipment with undischargeable materials; (12) Equipment with undischargeable materials; (13) Equipment with undischargeable materials; (14) Equipment with undischargeable materials; (15) Equipment with undischargeable materials; (16) Equipment with undischargeable materials; (17) Equipment with undischargeable materials; (18) Equipment with undischargeable materials; (19) Equipment with undischargeable materials; (20) Equipment with undischargeable materials; (21) Equipment with undischargeable materials; (22) Equipment with undischargeable materials; (23) Equipment with undischargeable materials; (24) Equipment with undischargeable materials (1) The mixing facilities and the discharging facilities or the cooling water supply equipment required to avoid dangerous consequences when localized and large-scale exothermic reactions occur; (2) The electrical equipment such as the safety shaft seals and positive pressure ventilation systems of large compressor units used for explosive and dangerous materials; (3) The power load of the accident lighting, communication systems, fire alarm equipment, and fire protection systems required for on-site accident handling, rescue, and evacuation of personnel when the power supply is interrupted. 3. The power load of the IXCS, electrical microcomputer protection, monitoring, and management systems for chemical process control. The load with special power supply requirements shall be included in the highest load level of the device or enterprise. 4.2 Power supply for the first, second, and third level loads
4.2.1 Level loads shall be powered by two power supplies. When using overhead lines, they should not be laid on the same pole. 4.2.2 Level 2 loads shall be powered by double-circuit power lines. When the load is small and it is very difficult to obtain a double-circuit power supply, 51.
-Major equipment: equipment that can control the entire process of chemical products, that is, equipment that has a decisive impact on the benefits and survival of chemical enterprises.
-Main equipment: equipment that can affect the continuous operation of the process of chemical products.
-Buffer equipment: refers to storage equipment with considerable capacity set between two stages of chemical process.
-Enterprise scale: refers to the size of the annual production capacity of the enterprise.
-Highest load level: refers to the load level with the highest importance in the device or enterprise.
-Power line: refers to the overhead or cable line for power supply between enterprises.
-Self-provided power station: refers to a power generation device that utilizes the thermal energy of the enterprise and has a complete system and independent blocks: the main power supply is from the busbar of the main substation of the enterprise.
-Self-provided generator: refers to the waste heat power generation equipment of the chemical device, which is connected to the power distribution busbar of the device and supplies power to the device.
一Determined power by steam: refers to the power generation capacity determined by the surplus amount of steam thermal energy in the enterprise, an emergency power supply system: refers to a power supply system that is connected to emergency power supply and normal operating power supply, and also supplies power to loads with special power supply requirements.
2.2 Symbols
Battery capacity calculated according to continuous discharge capacity conditions (A·h): Replacement battery capacity calculated according to impulse current conditions (A·h); High-voltage fuse plus vacuum contactor;
The synthetic magnetic field strength of the AC three-phase bus in the atmosphere (Am): The allowable value of the first harmonic current injected into the power grid by users (A);-The peak value of the closing inrush current of the parallel capacitor (kV): Battery discharge rate:
一Harmonic order;
——Diesel engine rated capacity (hP)
Diesel generator capacity (kw);
.-Capacitor capacity (kVar)
-Capacitor with harmonics Capacity (kVar): R.
--direct grounding resistance (k) that limits single-phase gap grounding overvoltage; SF
Sulphur dioxide;
St1--diesel generator set capacity (kVA) calculated according to stable loadTYKANKAca
S--: diesel generator set capacity (kVA) calculated according to the condition of the largest single motor or group of motors started last;
: diesel generator set capacity (KVA) calculated according to the condition of busbar allowable voltage failure when starting the motor: Skc minimum short-circuit capacity of the power grid (MVA);
Battery short-circuit capacity (MVA) of the power grid used for calculation-fault time (s).
2.3 Code
Uninterrupted power supply static AC uninterruptible power supply device; SF, gas insulated metal-enclosed switchgears fully enclosed sulfur hexafluoride combination electrical appliances; Distributed control system. 3
3.0.1 Basic requirements for power supply scheme:
3 Power supply scheme
1 The main power supply line should be simple and reliable, safe to operate, flexible to operate and convenient to maintain; 2 Economic and reasonable, save electricity, and strive to reduce investment (including infrastructure investment and subsidies) and reduce operating costs (including basic electricity charges and local electricity charges) and save medicine and land:
3 Meet the requirements of the recent (510) development plan 4 Reasonably select electrical products with advanced technology and reliable operation; 5 Meet the construction progress requirements of the enterprise,
-Generally, it is advisable to propose two power supply schemes, compare the technical and economic travel, and recommend the best one. 3.0.2 The main work content of the power supply scheme design stage: The power supply scheme should be determined based on the nature and scale of the enterprise, the enterprise's requirements for power supply reliability, the enterprise's power supply voltage level, the situation of the local power grid, the local natural conditions, the enterprise's general layout, and the enterprise's recent development plan.
1 Participate in site selection:
2 Investigate the situation of the regional power grid and its conditions for supplying power to the enterprise: 3 Load classification and load calculation of the whole plant!
4 When the enterprise has surplus heat energy for comprehensive utilization, it is necessary to study whether to set up a standby power station and its actual plan in conjunction with relevant professionals. Including power generation scale, unit selection, electrical main connection, etc.: 5 Negotiate power supply plans with local power departments, and after obtaining approval from the superior power department, assist the owner to sign a power supply agreement or letter of intent with the local power department: including the number of power supply circuits, power supply voltage level and power supply quality, communication plan with the power system, connection between the enterprise relay protection equipment and the power system, and the location of the electricity metering equipment: 6 Determine the whole! The main power supply connection scheme, the location of the main substation and the self-provided power station, and the inlet and outlet lines of the enterprise's power supply and distribution corridor
7 Draw several single-line diagrams of power supply schemes for selection: 8 Make technical and economic comparisons of the power supply schemes: 9 Prepare design documents.
4 Load level and power supply
4.1 Load level
TTYKAONTKACa
4.1.1 According to the importance of the power load in the continuous production process of the chemical industry, and in accordance with its requirements for power supply reliability and continuity, the chemical power load is divided into three levels: primary load, secondary load and tertiary load. In chemical production, there are also some loads with special power supply requirements. 4.1.2: Class-1 load-When the normal working power supply of the enterprise is suddenly interrupted, the continuous production of the enterprise is disrupted, which makes the When major equipment is damaged, it takes a long time to resume production after power is restored, which causes major products to be scrapped and products produced with important raw materials to be over-produced, causing major economic losses to key enterprises. 4.1.3 Secondary load: When the normal working power supply of an enterprise is suddenly interrupted, the continuous production process of the enterprise is disrupted, causing major equipment to be damaged, and it takes a long time to resume production after power is restored. Products are over-produced and production is reduced, causing major economic losses to key enterprises.
Usually large and medium-sized chemical enterprises are key enterprises with this third-level load. 4. 1.4 Level 3 loads - all loads that do not belong to level 1 or 2 (including loads with special power supply requirements) should be level 3 loads.
4.1.5 Loads with special power supply requirements - when the normal working power supply of an enterprise is suddenly interrupted due to a fault or the normal working power supply is manually cut off due to a fire, in order to ensure safe shutdown, avoid explosions and fire spread, poisoning and personal injury, or once such accidents occur, timely handle the accidents and prevent the accidents from expanding, and rescue and evacuate personnel, the loads that must be powered on.
Loads with special power supply requirements in enterprises under the current situation usually include the following types of loads that will cause explosions and material leakage when the power supply is cut off: (1) Safety shutdown automatic program control devices (instruments, relays, program controllers, etc.) and their actuators (such as feed valves, discharge valves, drain valves, etc.), as well as supporting disposal facilities; (2) Equipment with undischargeable materials; (3) Equipment with undischargeable materials; (4) Equipment with undischargeable materials; (5) Equipment with undischargeable materials; (6) Equipment with undischargeable materials; (7) Equipment with undischargeable materials; (8) Equipment with undischargeable materials; (9) Equipment with undischargeable materials; (10) Equipment with undischargeable materials; (11) Equipment with undischargeable materials; (12) Equipment with undischargeable materials; (13) Equipment with undischargeable materials; (14) Equipment with undischargeable materials; (15) Equipment with undischargeable materials; (16) Equipment with undischargeable materials; (17) Equipment with undischargeable materials; (18) Equipment with undischargeable materials; (19) Equipment with undischargeable materials; (20) Equipment with undischargeable materials; (21) Equipment with undischargeable materials; (22) Equipment with undischargeable materials; (23) Equipment with undischargeable materials; (24) Equipment with undischargeable materials (1) The mixing facilities and the discharging facilities or the cooling water supply equipment required to avoid dangerous consequences when localized and large-scale exothermic reactions occur; (2) The electrical equipment such as the safety shaft seals and positive pressure ventilation systems of large compressor units used for explosive and dangerous materials; (3) The power load of the accident lighting, communication systems, fire alarm equipment, and fire protection systems required for on-site accident handling, rescue, and evacuation of personnel when the power supply is interrupted. 3. The power load of the IXCS, electrical microcomputer protection, monitoring, and management systems for chemical process control. The load with special power supply requirements shall be included in the highest load level of the device or enterprise. 4.2 Power supply for the first, second, and third level loads
4.2.1 Level loads shall be powered by two power supplies. When using overhead lines, they should not be laid on the same pole. 4.2.2 Level 2 loads shall be powered by double-circuit power lines. When the load is small and it is very difficult to obtain a double-circuit power supply, 52 Symbols
Battery capacity calculated under continuous discharge capacity conditions (A·h): Battery capacity calculated under impulse current conditions (A·h); High-voltage fuse plus vacuum contactor;
Synthetic magnetic field strength of AC three-phase busbar in the atmosphere (Am): Allowable value of first harmonic current injected into the grid by users (A); Peak value of inrush current of parallel capacitor upon closing (kV): Battery discharge rate:
First harmonic order;
——Diesel engine rated capacity (hP)
Diesel generator capacity (kw);
.-Capacitor capacity (kVar)
-Capacitor capacity of harmonics (kVar); Var): R.
- Direct grounding resistance (k) to limit the overvoltage of single-phase gap grounding; SF
Sulfur hexafluoride;
St1- Diesel generator set capacity (kVA) calculated according to stable load TYKANKAca
S-: Diesel generator set capacity (kVA) calculated according to the condition of the last largest single motor or group of motors to be started;
: Diesel generator set capacity (KVA) calculat
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