This specification is applicable to the design of new or expanded projects of thermal power plants with a unit capacity of 750 to 25,000 kW, hydropower plants with a unit capacity of 200 to 10,000 kW, and transformer (distribution) stations with a voltage level of 110 kV and below. GBJ 63-1990 Design Specification for Electrical Measuring Instruments for Power Installations GBJ63-1990 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
Electrical Measuring Instruments for Power Installations
Design Specifications for Installations
GBJ63—90
1991Beijing
Engineering Construction Standard Full Text Information System
W Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
Electrical Measuring Instruments for Power Installations
Design Specifications for Installations
GBJ63—90
Editor Department: Chinese Former Ministry of Water Resources and Electric Power of the People's Republic of China Approval Department: Ministry of Construction of the People's Republic of China Effective Date: June 1, 1991
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the Issuance of "Design Specifications for Electrical Measuring Instruments for Power Installations"
(90)Jianbiaozi No. 314
According to the requirements of the State Planning Commission's Document No. [1986] 2630, the "Design Specifications for Electrical Measuring Instruments for Power Installations" revised by the Ministry of Energy has been reviewed by relevant departments. The "Design Specifications for Electrical Measuring Instruments for Power Installations" GBJ63-90 is now approved as a national standard and will be implemented on June 1, 1991. The former "Design Specifications for Electrical Measuring Instruments for Industrial and Civilian Power Installations" GBJ63-83 will be abolished at the same time. The Ministry of Energy is responsible for the management of this specification, and the Southwest Electric Power Design Institute of the Ministry of Energy is responsible for its specific interpretation. The publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
July 2, 1990
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Revision Notes
This specification is compiled by the former Power Planning and Design Administration of the Ministry of Water Resources and Electric Power in accordance with the requirements of the State Planning Commission's Document No. [1986] 2630, and is specifically compiled by the Southwest Electric Power Design Institute of the Ministry of Energy and related units. During the revision process, the specification revision group conducted extensive investigations and studies, carefully summarized the experience since the implementation of the original specification, absorbed some scientific research results, and widely solicited opinions from relevant units across the country. Finally, the Ministry of Construction reviewed and finalized it together with relevant departments. This specification is divided into five chapters and two appendices. The main contents of this revision are: 1. Clearly define the scope of application of this specification; 2. Make specific and clear provisions for electric energy measurement; 3. Add the provisions for secondary circuit design; 4. Add the provisions for frequency measurement, synchronous parallel measurement, harmonic measurement and negative sequence current measurement;
5. Modify and supplement the provisions on the accuracy level of devices such as mutual inductors used in electrical measuring instruments.
During the implementation of this specification, if you find that there is a need for modification or supplementation, please send your opinions and relevant materials to the Southwest Electric Power Design Institute of the Ministry of Energy, and copy it to the Electric Power Planning and Design Administration of the Ministry of Energy for reference in future revisions. Ministry of Energy of the People's Republic of China
May 1990
Engineering Construction Standards Full Text Information System
WEngineering Construction Standards Full Text Information System
Chapter 1
Chapter 2
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Chapter 3
Section 1
Section 2
Chapter 4
Chapter 5
Appendix 2
Common Measuring Instruments·
General Provisions
Current Measurement
Voltage Measurement and Insulation Monitoring
Power Measurement·
Frequency Measurement||t t||Synchronous parallel measurement
Harmonic measurement
Electric energy metering…·
Electric energy metering instrument
......
Accuracy level of electric energy metering device
Secondary circuit
Instrument installation conditions·
Glossary
Explanation of terms used in this specification
Additional instructions
Engineering construction standard full text information system
Engineering construction standard full text information system
Chapter 1 General
Article 1.0.1 This specification is formulated in order to ensure that the design of electrical measuring instruments for power installations conscientiously implements the national technical and economic policies, is accurate, reliable, technologically advanced, and economically reasonable, and meets the needs of safe operation of power installations and power quality assessment.
Article 1.0.2 This specification applies to the design of new or expanded thermal power plants with a unit capacity of 750 to 25,000 kW, hydropower plants with a unit capacity of 200 to 10,000 kW, and transformers (distribution) with a voltage level of 110 kV and below. Article 1.0.3 The design of electrical measuring instruments for power installations shall comply with the relevant national standards and specifications in force in addition to the implementation of this specification. Engineering Construction Standards Full-text Information System
Engineering Construction Standards Full-text Information System
Chapter 2
Common Measuring Instruments
Section 1 General Provisions
Article 2.1.1 This chapter applies to indicating instruments, mathematical instruments, recording instruments, and transformers used with instruments that are fixedly installed on screens, tables, cabinets, and boxes. Article 2.1.2 Common measuring instruments shall meet the following requirements: 1. They can correctly reflect the operating parameters of the power installation; 2. They can monitor the insulation condition of the power installation circuit at any time. Article 2.1.3 The accuracy level of commonly used measuring instruments shall be selected according to the following requirements:
, except for harmonic measuring instruments, the accuracy level of AC circuit instruments shall not be lower than Class 2.5;
, the accuracy level of DC circuit instruments shall not be lower than Class 1.5; 3. The accuracy level of instruments on the output side of the power transmitter shall not be lower than Class 1.0. Article 2.1.4 The accuracy level of transformers used with commonly used measuring instruments shall be selected according to the following requirements:
, 1. Commonly used measuring instruments of Class 1.5 and Class 2.5 shall be equipped with transformers of not less than Class 1.0;
, 2. Power transmitters shall be equipped with current transformers of not less than Class 0.5. Article 2.1.5 The accuracy level of external shunts used with DC instruments shall not be lower than Class 0.5.
The accuracy level of power transmitters shall not be lower than Class 0.5. Article 2.1.6
Article 2.1.7 The selection of the measuring range of the instrument and the ratio of the current transformer should meet the requirement that when the power device circuit operates at the rated value, the indication of the instrument is at 70100% of the scale.
Engineering Construction Standard Full Text Information System
W. Engineering Construction Standard Full Text Information System
For power device circuits that may be overloaded, the measuring range of the instrument should have an appropriate overload margin.
For motors that are started under heavy load and power device circuits that may have short-term impact currents during operation, it is advisable to use an ammeter with an overload scale. For power device circuits that may operate in both directions, an instrument with a bidirectional scale should be used.
Article 2.1.8 For the measurement of parameters of multiple power device circuits of the same type, a selection system composed of electrical quantity transmitters should be used. The types and quantity of the selected parameters can be determined according to the needs of production process and operation monitoring. Section 2 Current Measurement
Article 2.2.1 The following power device circuits should measure AC current: 1. Generator;
2. Main transformers with high voltage side of 35kV and above and low voltage side of 1200V and above, among which: only one side of the double-winding main transformer is measured, and all sides of the three-winding main transformer are measured;
3. Parallel power capacitor banks;
4. Lines of 1200V and above and main trunk lines of power supply, distribution and power consumption networks below 1200V;
5. Busbar connection, busbar sectioning, bypass and bridge circuit breaker circuits: 6. Arc suppression coil;
7. Electric motors of 55kW and above;
8. Other power device circuits that need to monitor AC current according to the requirements of the production process.
Article 2.2.2
The following power device circuits should measure or record negative sequence current: 1. Generators that supply power to power users with significantly unbalanced three-phase loads and may exceed the long-term negative sequence current capacity allowed by the manufacturer during operation; 2. Negative sequence current monitoring points in the power system and at power users. Article 2.2.3 Power device circuits with basically balanced three-phase currents can use the engineering construction standard full text information system
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One ammeter measures one phase current, but in the following power device circuits, three ammeters should be used to measure the three-phase current respectively: 1. Steam turbine generator and 380V hydro-turbine generator; 2. The total circuit of parallel power capacitor group; 3. 110kV important lines;
4. 1200V and above power user lines with three-phase load imbalance rate greater than 10%;
5. 1200V and below power supply lines with three-phase load imbalance rate greater than 15%. Article 2.2.4 The following power device circuits shall measure DC current: 1. DC generator,
2. DC motor;
3. Battery pack;
4. Charging circuit;
5. Power rectifier;
6. Generator, synchronous motor excitation circuit except brushless excitation and output circuit of automatic excitation device;
7. Other power device circuits that need to monitor DC current according to the requirements of production process.
Section 3 Voltage Measurement and Insulation Monitoring
Article 2.3.1 The following power device circuits shall measure AC voltage: 1. Generator;
2. Each section of the busbar of the AC system;
3. Other power device circuits that need to monitor AC voltage according to the requirements of production process.
Article 2.3.2 The following power device circuits shall measure the DC voltage: 1. DC generator;
2. Each section of the DC system busbar;
3. Battery pack;
Engineering Construction Standard Full Text Information System
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4. Charging circuit;
5. Power rectifier;
6. Generator excitation circuit;
7. Other power device circuits that need to monitor the DC voltage according to the requirements of the production process.
Article 2.3.3
The following power device circuits shall monitor the insulation of the AC system: 1. Generator;
2. Each section of the busbar of the neutral point non-effectively grounded system. Article 2.3.4 The following power device circuits shall monitor the insulation of the DC system: 1. Generator excitation circuit;
2. Each section of the busbar of the DC system.
Section 4 Power Measurement
Article 2.4.1 The following power device circuits should measure active power: 1. Generators;
2. Main transformers with high voltage side of 35kV and above and low voltage side of 1200V and above, among which only one side of the double-winding transformer is measured and both sides of the three-winding main transformer are measured;
3. Lines of 35kV and above;
4. Circuit breaker circuits of dedicated bypass and combined bypass; 5. Permanent external bridge circuit breaker circuits of 35kV and above; 6. Other power device circuits that need to monitor active power according to the requirements of the production process.
Article 2.4.2 The following power device circuits shall measure reactive power: 1. Generators,
2. Main transformers with high voltage side of 35kV and above and low voltage side of 1200V and above, among which, only one side of the double-winding main transformer is measured, and both sides of the three-winding main transformer are measured,
3. 1200V and above parallel power capacitor banks; Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. Lines above 35kV;
5. Circuit breaker circuits of dedicated bypass and combined bypass above 35kV; 6. Permanent external bridge circuit breaker circuit above 35kV; 7. Other power device circuits that need to monitor reactive power according to the requirements of production process.
Article 2.4.3
Synchronous motors shall be equipped with power factor meters. Section 5 Frequency Measurement
Article 2.5.1 Frequency monitoring points shall be set for the following power device circuits: 1. Generators;
2. Each section of bus connected to generators and generator transformer groups; 3. Each section of bus in the substation that may be decoupled for operation. Section 6 Synchronous Parallel Measurement
Article 2.6.1 Power plants and substations with parallel points shall be equipped with manual quasi-synchronous measuring instruments.
Section 7 Harmonic Measurement
Article 2.7.1 Harmonic voltage and harmonic current measuring instruments shall be installed at harmonic monitoring points.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 Electric Energy Measurement
Section 1 Electric Energy Metering Instruments
Article 3.1.1 Active energy meters shall be installed for the following power device circuits: 1. Generators.
2. Main transformers. Active energy meters shall be installed on each side of the main transformer that needs to assess the busbar active energy balance; for the main transformer that does not need to assess the busbar active energy balance, three-winding main transformers shall be installed on both sides, and two-winding main transformers shall be installed on only one side. 3. Lines of 1200V~110kV in the power system. 4. Main trunk lines of power supply, distribution and power consumption networks below 1200V. 5. Active energy metering points at power users. 6. Circuit breakers of dedicated bypass and combined bypass. 7. Motors of 75kW and above that need to undergo technical and economic assessment. 8. Other power device circuits that need to measure active energy according to the requirements of technical and economic assessment and energy-saving management.
Article 3.1.2 Reactive energy meters shall be installed on the following power device circuits: 1. Generator.
2. Main transformer. For three-winding main transformers, both sides shall be installed. For two-winding main transformers, only one side shall be installed.
3. 3~110kV lines in the power system. 4. Parallel power capacitor banks.
5. Reactive power metering points at power users. 6. Circuit breaker circuits for dedicated bypass and combined bypass. 7. Construction standards for reactive power projects that require metering according to technical and economic assessment and energy-saving management requirements2. The following power device circuits should measure reactive power: 1. Generators,
2. Main transformers with high voltage side of 35kV and above and low voltage side of 1200V and above, among which, only one side of the double-winding main transformer is measured, and both sides of the three-winding main transformer are measured,
3. Parallel power capacitor banks of 1200V and above; Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. Lines above 35kV; bZxz.net
5. Circuit breaker circuits of dedicated bypass and combined bypass above 35kV; 6. Permanent external bridge circuit breaker circuits above 35kV; 7. Other power device circuits that need to monitor reactive power according to the requirements of the production process.
Article 2.4.3
Synchronous motors should be equipped with power factor meters. Section 5 Frequency Measurement
Article 2.5.1 Frequency monitoring points shall be set for the following power device circuits: 1. Generators;
2. Each section of bus connected to generators and generator transformer groups; 3. Each section of bus in the substation that may be decoupled for operation. Section 6 Synchronous Parallel Measurement
Article 2.6.1 Power plants and substations with parallel points shall be equipped with manual quasi-synchronous measuring instruments.
Section 7 Harmonic Measurement
Article 2.7.1 Harmonic voltage and harmonic current measuring instruments shall be installed at harmonic monitoring points.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 Electric Energy Measurement
Section 1 Electric Energy Metering Instruments
Article 3.1.1 Active energy meters shall be installed for the following power device circuits: 1. Generators.
2. Main transformers. Active energy meters shall be installed on each side of the main transformer that needs to assess the busbar active energy balance; for the main transformer that does not need to assess the busbar active energy balance, three-winding main transformers shall be installed on both sides, and two-winding main transformers shall be installed on only one side. 3. Lines of 1200V~110kV in the power system. 4. Main trunk lines of power supply, distribution and power consumption networks below 1200V. 5. Active energy metering points at power users. 6. Circuit breakers of dedicated bypass and combined bypass. 7. Motors of 75kW and above that need to undergo technical and economic assessment. 8. Other power device circuits that need to measure active energy according to the requirements of technical and economic assessment and energy-saving management.
Article 3.1.2 Reactive energy meters shall be installed on the following power device circuits: 1. Generator.
2. Main transformer. For three-winding main transformers, both sides shall be installed. For two-winding main transformers, only one side shall be installed.
3. 3~110kV lines in the power system. 4. Parallel power capacitor banks.
5. Reactive power metering points at power users. 6. Circuit breaker circuits for dedicated bypass and combined bypass. 7. Construction standards for reactive power projects that require metering according to technical and economic assessment and energy-saving management requirements2. The following power device circuits should measure reactive power: 1. Generators,
2. Main transformers with high voltage side of 35kV and above and low voltage side of 1200V and above, among which, only one side of the double-winding main transformer is measured, and both sides of the three-winding main transformer are measured,
3. Parallel power capacitor banks of 1200V and above; Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. Lines above 35kV;
5. Circuit breaker circuits of dedicated bypass and combined bypass above 35kV; 6. Permanent external bridge circuit breaker circuits above 35kV; 7. Other power device circuits that need to monitor reactive power according to the requirements of the production process.
Article 2.4.3
Synchronous motors should be equipped with power factor meters. Section 5 Frequency Measurement
Article 2.5.1 Frequency monitoring points shall be set for the following power device circuits: 1. Generators;
2. Each section of bus connected to generators and generator transformer groups; 3. Each section of bus in the substation that may be decoupled for operation. Section 6 Synchronous Parallel Measurement
Article 2.6.1 Power plants and substations with parallel points shall be equipped with manual quasi-synchronous measuring instruments.
Section 7 Harmonic Measurement
Article 2.7.1 Harmonic voltage and harmonic current measuring instruments shall be installed at harmonic monitoring points.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 3 Electric Energy Measurement
Section 1 Electric Energy Metering Instruments
Article 3.1.1 Active energy meters shall be installed for the following power device circuits: 1. Generators.
2. Main transformers. Active energy meters shall be installed on each side of the main transformer that needs to assess the busbar active energy balance; for the main transformer that does not need to assess the busbar active energy balance, three-winding main transformers shall be installed on both sides, and two-winding main transformers shall be installed on only one side. 3. Lines of 1200V~110kV in the power system. 4. Main trunk lines of power supply, distribution and power consumption networks below 1200V. 5. Active energy metering points at power users. 6. Circuit breakers of dedicated bypass and combined bypass. 7. Motors of 75kW and above that need to undergo technical and economic assessment. 8. Other power device circuits that need to measure active energy according to the requirements of technical and economic assessment and energy-saving management.
Article 3.1.2 Reactive energy meters shall be installed on the following power device circuits: 1. Generator.
2. Main transformer. For three-winding main transformers, both sides shall be installed. For two-winding main transformers, only one side shall be installed.
3. 3~110kV lines in the power system. 4. Parallel power capacitor banks.
5. Reactive power metering points at power users. 6. Circuit breaker circuits for dedicated bypass and combined bypass. 7. Construction standards for reactive power projects that require metering according to technical and economic assessment and energy-saving management requirements
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