Power capacitor installation
1 scope
The technology standard is applicable to 10 kv, parallel compensation under the electric power capacitor installation.
2 construction preparation
2.1 equipment and materials requirements:
2.1.1 capacitor should be equipped with nameplate, indicate the factory name, rated capacity, connection mode, voltage grade and other technical data. Spare parts shall be complete and have a product certificate of approval and technical documents.
2.1.2 capacity and specifications and must meet the design requirements.
2.1.3 capacitors and other electrical components appearance no rust and damaged phenomenon.
2.1.4 casing thread rod should be no bending and slide fastener, extension line terminal attachment is complete, the pressure to close. No defects and the oil leakage phenomenon.
2.1.5 erection of steel should comply with the design requirements, and no obvious corrosion, bolt are galvanized bolts should be adopted.
2.1.6 materials shall comply with the design requirements and product certification.
2.2 the main equipment:
2.2.1 installation equipment: carts, drill, grinding wheel, electric welding machine, welding tools, pliers, wrenches, etc.
2.2.2 testing tools, steel tape, steel tape, feeler, shaking table, multimeter, clamp ampere meter.
2.3 operation conditions
2.3.1 construction drawings and technical data is complete.
2.3.2 basic civil engineering construction, ground, metope is complete, elevation, size, structure and embedded parts shall comply with the design requirements.
2.3.3 roof without slack phenomenon, doors and Windows and glass installed, door lock, clean, clear.
3 operation process
3.1 process:
Equipment out of the box installed some pieces - based production or framework - capacitor secondary handling - - > capacitor installation
On-line power of inspection before - sending operation acceptance
3.2 equipment point check:
3.2.1 equipment point check pieces shall be installed by the units, construction units and supply units on behalf of the joint, and make records.
3.2.2 according to the equipment list for equipment and spare parts inventory check them one by one, should conform to the requirements of the drawings, is in good condition.
3.2.3 below 500 v for capacitor, the shaking table for them one by one with 1000 v wave measurement, 3 ~ 10 kv capacitor with 2500 v insulation shake table test, and make records.
3.3 installed based production or framework.
3.3.1 complete capacitor box set before the installation, should according to the design requirements well steel base.
3.3.2 rainfall distribution on 10-12 packaged capacitor before installation should be according to the requirements stated in the drawing frame, the capacitor can be installed in the layered, generally not more than three layers, layers should not be adding clapboard, capacitor structure of non combustible materials should be adopted. The horizontal distance between frame is not less than 0.5 m, the lower the bottom of the condenser is apart from the ground should not be less than 0.3 m, capacitor bus bar to the distance of the superstructure should not be less than 20 cm, the distance between each capacitor according to the specifications and design requirements for installation, if there is no requirement should not be less than 50 mm.
3.3.3 basic sections and architecture must brush paint according to the requirement and well grounded.
3.4 capacitor secondary handling. A capacitor to should take put down gently, in pay attention to the protection shell porcelain and free from any mechanical damage.
3.5 capacitor installation:
3.5.1 track of capacitor is usually installed in a dedicated capacitor indoor, should not be installed in a damp, dusty, high temperature, flammable, explosive and corrosive gases.
3.5.2 rated voltage should be consistent with the grid voltage of capacitor. General Angle should be adopted.
3.5.3 capacitor Banks should keep the balance of three phase, three-phase unbalance current is not more than 5%.
3.5.4 capacitor must be discharge. To ensure that the power cuts after quickly put out the storage of electricity.
2.6.2 capacitor nameplate when installation should be one side to the channel.
3.5.6 capacitor metal case must be reliable grounding.
3.6 wires.
3.6.1 capacitor connection line should use soft wire, wiring should be symmetrical, tidy and beautiful, terminal line should add the nose, and pressure welding is firm and reliable.
3.6.2 capacitor Banks with bus connection, don't make the capacitor casing (terminal) due to mechanical stress, pressure meet rigorous and reliable, and bus order, and good brush color.
3.6.3 the control wire connection of capacitor set should be in conformity with the wiring plate ark, secondary circuit wiring requirements.
3.7 before sending check:
3.7.1 wave measuring insulation: 1 kv capacitor application under 1000 v, the shake table test 3 ~ 10 kv capacitor used 2500 v shake table test, and make records. Measure should be paid attention to when the wave measuring method, in case of capacitor discharge burn out shaking table after the shake to discharge.
Pressure test: 3.7.2 power capacitor should be tested for handover before sending. Ac withstand voltage test standard reference table 2-40.
Power (phase shift) capacitance ac withstand voltage test standard table 2-40
Rated voltage (kV) < 1 1 3 6 to 10
The factory test voltage (kV) 3 5 18 to 25 to 35
Handover test voltage (kV) 2.2 3.8 14 19 to 26
3.7.3 capacitor appearance inspection no bad damage and oil leakage, oil leakage phenomenon.
3.7.4 on-line accurate and reliable.
3.7.5 various protection device is accurate and reliable.
3.7.6 discharge system is in good condition.
3.7.7 control equipment is in good condition, the movement is normal, all kinds of instrument calibration qualified.
3.7.8 automatic power factor compensation device to adjust (adjust) with phase shifter in advance.
3.8 sending run acceptance:
3.8.1 impact closing test: the power capacitor group three times impact closing test, no abnormal situation, can put into operation.
3.8.2 run normally after 24 hours, should go through the formalities of acceptance, handed over to party a's acceptance.
3.8.3 acceptance should be handed over to the following technical data:
Design drawings and technical data of the equipment with 3.8.3.1;
3.8.3.2 design changes regarding the record;
3.8.3.3 equipment unpacking inspection records;
3.8.3.4 equipment insulation shake test and pressure test records;
3.8.3.5 installation records and testing records.
4 quality standards
4.1 ensure project
4.4.1 capacitors and its accessories test adjustment and capacitor body check result, must conform to the requirements of the specification.
Inspection method: inspect installation records.
4.1.2 capacitor body can not have bad damage and oil leakage, no crack, porcelain porcelain glaze without damage.
Inspection method: to observe the examination.
4.2 the basic project
2 capacitors shall meet the following requirements:
4.2.1.1 position correctly, fixed firmly, surface cleaning, paint intact;
4.2.1.2 capacitor installation distance within the rules.
Test method: measurement and check the installation records.
On-line 4.2.2 capacitor shall meet the following requirements:
4.2.2.1 connected closely, complete accessories, porcelain is not affected by stress;
4.2.2.2 grounding accurate and reliable, without missing;
4.2.2.3 structure and level of cabinet put oneself in another's position should be in accordance with the specification and vertical installation, fixed firmly, paint intact;
4.2.2.4 wiring symmetry is consistent, neat and beautiful, bus phase color intact.
Inspection method: to observe the examination.
5 finished product protection
5.1 capacitor room should be locked, irrelevant personnel shall not be casually.
5.2 good to not installed and installed capacitor should be packed in wooden cases or cartons will protect the porcelain vase, in case of damage of porcelain.
5.3 construction over the capacitor, the capacitor to take protective measures.
5.4 keep indoor clean, prevent the original electric dust damage.
6 should pay attention to quality problems
6.1 capacitor installation quality problems should be paid attention to are shown in table 2-41.
7 should possess the quality of the record
7.1 equipment material receiving inspection records.
7.2 product certification.
7.3 insulation shake test record.
7.4 commissioning test report.
Capacitor installation common quality problems and the method of prevention and cure table 2-41
Common quality on disease prevention measures
1. The metal frame and steel, welding slag cleaning not net, brush paint is missing
2. The ground wire is not in conformity with the specification requirement to strengthen the learning of standard grounding device chapter
3. Wiring arrangement is not neat, not beautiful, the main jobs line not tight pressure to strengthen construction workers understanding of capacitor, especially to the attention of the capacitor current link
7.5 design changes regarding the record.
7.6 kinds of construction quality assessment record.
1 scope
The technology standard is applicable to 10 kv, parallel compensation under the electric power capacitor installation.
2 construction preparation
2.1 equipment and materials requirements:
2.1.1 capacitor should be equipped with nameplate, indicate the factory name, rated capacity, connection mode, voltage grade and other technical data. Spare parts shall be complete and have a product certificate of approval and technical documents.
2.1.2 capacity and specifications and must meet the design requirements.
2.1.3 capacitors and other electrical components appearance no rust and damaged phenomenon.
2.1.4 casing thread rod should be no bending and slide fastener, extension line terminal attachment is complete, the pressure to close. No defects and the oil leakage phenomenon.
2.1.5 erection of steel should comply with the design requirements, and no obvious corrosion, bolt are galvanized bolts should be adopted.
2.1.6 materials shall comply with the design requirements and product certification.
2.2 the main equipment:
2.2.1 installation equipment: carts, drill, grinding wheel, electric welding machine, welding tools, pliers, wrenches, etc.
2.2.2 testing tools, steel tape, steel tape, feeler, shaking table, multimeter, clamp ampere meter.
2.3 operation conditions
2.3.1 construction drawings and technical data is complete.
2.3.2 basic civil engineering construction, ground, metope is complete, elevation, size, structure and embedded parts shall comply with the design requirements.
2.3.3 roof without slack phenomenon, doors and Windows and glass installed, door lock, clean, clear.
3 operation process
3.1 process:
Equipment out of the box installed some pieces - based production or framework - capacitor secondary handling - - > capacitor installation
On-line power of inspection before - sending operation acceptance
3.2 equipment point check:
3.2.1 equipment point check pieces shall be installed by the units, construction units and supply units on behalf of the joint, and make records.
3.2.2 according to the equipment list for equipment and spare parts inventory check them one by one, should conform to the requirements of the drawings, is in good condition.
3.2.3 below 500 v for capacitor, the shaking table for them one by one with 1000 v wave measurement, 3 ~ 10 kv capacitor with 2500 v insulation shake table test, and make records.
3.3 installed based production or framework.
3.3.1 complete capacitor box set before the installation, should according to the design requirements well steel base.
3.3.2 rainfall distribution on 10-12 packaged capacitor before installation should be according to the requirements stated in the drawing frame, the capacitor can be installed in the layered, generally not more than three layers, layers should not be adding clapboard, capacitor structure of non combustible materials should be adopted. The horizontal distance between frame is not less than 0.5 m, the lower the bottom of the condenser is apart from the ground should not be less than 0.3 m, capacitor bus bar to the distance of the superstructure should not be less than 20 cm, the distance between each capacitor according to the specifications and design requirements for installation, if there is no requirement should not be less than 50 mm.
3.3.3 basic sections and architecture must brush paint according to the requirement and well grounded.
3.4 capacitor secondary handling. A capacitor to should take put down gently, in pay attention to the protection shell porcelain and free from any mechanical damage.
3.5 capacitor installation:
3.5.1 track of capacitor is usually installed in a dedicated capacitor indoor, should not be installed in a damp, dusty, high temperature, flammable, explosive and corrosive gases.
3.5.2 rated voltage should be consistent with the grid voltage of capacitor. General Angle should be adopted.
3.5.3 capacitor Banks should keep the balance of three phase, three-phase unbalance current is not more than 5%.
3.5.4 capacitor must be discharge. To ensure that the power cuts after quickly put out the storage of electricity.
2.6.2 capacitor nameplate when installation should be one side to the channel.
3.5.6 capacitor metal case must be reliable grounding.
3.6 wires.
3.6.1 capacitor connection line should use soft wire, wiring should be symmetrical, tidy and beautiful, terminal line should add the nose, and pressure welding is firm and reliable.
3.6.2 capacitor Banks with bus connection, don't make the capacitor casing (terminal) due to mechanical stress, pressure meet rigorous and reliable, and bus order, and good brush color.
3.6.3 the control wire connection of capacitor set should be in conformity with the wiring plate ark, secondary circuit wiring requirements.
3.7 before sending check:
3.7.1 wave measuring insulation: 1 kv capacitor application under 1000 v, the shake table test 3 ~ 10 kv capacitor used 2500 v shake table test, and make records. Measure should be paid attention to when the wave measuring method, in case of capacitor discharge burn out shaking table after the shake to discharge.
Pressure test: 3.7.2 power capacitor should be tested for handover before sending. Ac withstand voltage test standard reference table 2-40.
Power (phase shift) capacitance ac withstand voltage test standard table 2-40
Rated voltage (kV) < 1 1 3 6 to 10
The factory test voltage (kV) 3 5 18 to 25 to 35
Handover test voltage (kV) 2.2 3.8 14 19 to 26
3.7.3 capacitor appearance inspection no bad damage and oil leakage, oil leakage phenomenon.
3.7.4 on-line accurate and reliable.
3.7.5 various protection device is accurate and reliable.
3.7.6 discharge system is in good condition.
3.7.7 control equipment is in good condition, the movement is normal, all kinds of instrument calibration qualified.
3.7.8 automatic power factor compensation device to adjust (adjust) with phase shifter in advance.
3.8 sending run acceptance:
3.8.1 impact closing test: the power capacitor group three times impact closing test, no abnormal situation, can put into operation.
3.8.2 run normally after 24 hours, should go through the formalities of acceptance, handed over to party a's acceptance.
3.8.3 acceptance should be handed over to the following technical data:
Design drawings and technical data of the equipment with 3.8.3.1;
3.8.3.2 design changes regarding the record;
3.8.3.3 equipment unpacking inspection records;
3.8.3.4 equipment insulation shake test and pressure test records;
3.8.3.5 installation records and testing records.
4 quality standards
4.1 ensure project
4.4.1 capacitors and its accessories test adjustment and capacitor body check result, must conform to the requirements of the specification.
Inspection method: inspect installation records.
4.1.2 capacitor body can not have bad damage and oil leakage, no crack, porcelain porcelain glaze without damage.
Inspection method: to observe the examination.
4.2 the basic project
2 capacitors shall meet the following requirements:
4.2.1.1 position correctly, fixed firmly, surface cleaning, paint intact;
4.2.1.2 capacitor installation distance within the rules.
Test method: measurement and check the installation records.
On-line 4.2.2 capacitor shall meet the following requirements:
4.2.2.1 connected closely, complete accessories, porcelain is not affected by stress;
4.2.2.2 grounding accurate and reliable, without missing;
4.2.2.3 structure and level of cabinet put oneself in another's position should be in accordance with the specification and vertical installation, fixed firmly, paint intact;
4.2.2.4 wiring symmetry is consistent, neat and beautiful, bus phase color intact.
Inspection method: to observe the examination.
5 finished product protection
5.1 capacitor room should be locked, irrelevant personnel shall not be casually.
5.2 good to not installed and installed capacitor should be packed in wooden cases or cartons will protect the porcelain vase, in case of damage of porcelain.
5.3 construction over the capacitor, the capacitor to take protective measures.
5.4 keep indoor clean, prevent the original electric dust damage.
6 should pay attention to quality problems
6.1 capacitor installation quality problems should be paid attention to are shown in table 2-41.
7 should possess the quality of the record
7.1 equipment material receiving inspection records.
7.2 product certification.
7.3 insulation shake test record.
7.4 commissioning test report.
Capacitor installation common quality problems and the method of prevention and cure table 2-41
Common quality on disease prevention measures
1. The metal frame and steel, welding slag cleaning not net, brush paint is missing
2. The ground wire is not in conformity with the specification requirement to strengthen the learning of standard grounding device chapter
3. Wiring arrangement is not neat, not beautiful, the main jobs line not tight pressure to strengthen construction workers understanding of capacitor, especially to the attention of the capacitor current link
7.5 design changes regarding the record.
7.6 kinds of construction quality assessment record.
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