Preparation before acceptance of electric power engineering construction [urgent]

Electrical debugging scheme

Binyang Burning 500,000 Tons/Year High-grade Road Asphalt Project

Electrical debugging scheme

Compile:

Review:

Safety courses:

March 2(nd), 2007

China chemical engineering No.14 construction company

catalogue

Chapter 1, Project Overview

Chapter II, Compilation Basis

Chapter III Preparation for Debugging Work

Chapter four, main equipment debugging projects.

Chapter 5, Simulation Test of Panel and Cabinet

Chapter VI, Commissioning Progress

Chapter VII List of Debugging Equipment

Chapter VIII, Safety Management and Safeguard Measures for Commissioning

Chapter 1, Project Overview

Binyang Huabin 500,000 tons/year high-grade road asphalt project is located in Yangxin Economic and Technological Development Zone, Binzhou City, with a single ring road. The main contents of electrical installation and debugging include: power transformer, high and low voltage switchgear, power capacitor, motor, etc.

Debugging and cleaning list

Serial number, project quantity name, unit quantity

1 oil-immersed transformer s935/10kv5000kva1

2 2 sets of dry-type transformers SC910/0.4 kV 2000 KVA.

3 dry-type transformer sc910/0.4kv1600kva1

4 dry-type transformer sc910/0.4kv1250kva1

5 High voltage cabinet 35KV platform 6

See the drawing for 6.35KV vacuum circuit breaker.

7 35KV arrester as shown in the drawing.

6 High voltage cabinet 10KV platform 12

8 vacuum circuit breaker 10KV table as shown in the drawing.

9 arrester 10KV. See the drawings for details.

7 Power capacitor 10KV group 1

10 power cable 35KV root 2

1 1 power cable 10KV 6th root

12 copper busbar withstand voltage test 35KV system 1

13 copper bus withstand voltage test 10KV system 2

14 0.4KV low-voltage cabinet 7 1

15 bus bridge 10KV/0.4KV M 18.

16 ammeter, voltmeter and other low-voltage appliances are shown in the figure.

17 grounding device is shown in the drawing.

18 comprehensive protection device group 1

Chapter II, Compilation Basis

Electrical drawings of 500,000 tons/year high-grade road asphalt project designed by Shandong Hua Bin Group Chemical Design and Research Institute Co., Ltd.

Instructions for oil-immersed transformer provided by Jinan Zhiyou Group Co., Ltd.

China? Manual of dry-type transformer provided by Shandong Jinmanke Electric Group Co., Ltd.

Factory information provided by Anhui Xinlong Electric Appliance Co., Ltd.

Electrical Equipment Handover Test Standard GB50 150-9 1

Code for Construction and Acceptance of High-voltage Electrical Equipment Installation Engineering GBJ 147-90

Code for Construction and Acceptance of Power Transformers, Oil-immersed Reactors and Transformers in Electrical Installation Engineering (GBJ 148-90)

Code for Construction and Acceptance of Bus Device in Electrical Device Installation Engineering GBJ 149-90

Code for Construction and Acceptance of Cable Lines in Electrical Equipment Installation Engineering GBJ50 168-92

Code for Construction and Acceptance of Rotating Electrical Machines in Electrical Equipment Installation Engineering GBJ50 170-92

Code for construction and acceptance of electrical equipment installation cabinet and secondary circuit wiring GBJ50 17 1-92.

Code for Construction and Acceptance of Low-voltage Electrical Apparatus in Electrical Equipment Installation Engineering GBJ50254-96

Code for Construction and Acceptance of Grounding Devices in Electrical Equipment Installation Engineering GBJ50 169-92

Technical Specification for Safety of Temporary Electricity Use in Construction Site JGJ46-88

Provisions on Technical Documents for Construction Completion of Chemical Engineering HG20237-94

Unified Standard for Quality Inspection and Evaluation of Industrial Installation Engineering GB50252-94

Chapter III Preparation for Debugging Work

3. 1 debugging organization

3, 2 debugging preparation

(1) technical disclosure

(2) Preparation for temporary power use (from the nearby power cabinet to the distribution room, 380 temporary power supply shall be provided for the low-voltage cabinet, and the DC panel shall provide the required DC power supply for the high-voltage cabinet).

(3) Read the electrical design drawings carefully.

(4) Read the product manual carefully.

5] check whether all the equipment is in conformity with the design drawings.

[6] All equipment is installed, the internal wiring of panels and cabinets is good, and the grounding wire is installed.

Once the high voltage cable head is completed.

Being debugging site cleaning and temporary lighting preparation.

Levies the cordon, and make the logo.

⑽ Preparation and storage of debugging machines and tools

Chapter four, main equipment debugging projects.

1, oil-immersed transformer (S9 35KV 10KV 5000KVA)

Before the transformer is put into operation, the following tests shall be carried out. Before the test, the casing and gas relay should be deflated again, and check whether the transportation gasket between the lower flange of the dehumidifier and the cover has been removed.

1. 1 transformer test

(1) Measure the insulation resistance of the winding and bushing, and the insulation resistance shall not be less than 70% of the ex-factory test value of the product. When the measured temperature is different from the factory test temperature of the product, the values converted into the same temperature can be compared according to Table 6.0.5.

The factory test data are as follows (17OC)

project

Test the insulation resistance of the wiring 1 (mω) 2 External withstand voltage test (KV)

R 15 R60 absorption ratio test voltage time (seconds) conclusion

High voltage-low voltage and grounding 2500 85 60 qualified

Low voltage-high voltage and grounding 2500 35 60 qualified.

Temperature conversion coefficient of insulation resistance of oil-immersed power transformer Table 6.05

Temperature difference K51015 20 25 30 35 40 45 50

The conversion factor in the table is a1.21.51.82.32.83.44.15.16.27.5k. In order to subtract the absolute value of 20OC from the measured temperature, when the measured temperature difference of insulation resistance is not the value listed in the table, it can be calculated as follows: A= 1.5K/ 10.

The insulation resistance value corrected to 20OC can be calculated by the following formula:

When the measuring temperature is higher than 20OC, R20=ARt, and when the measuring temperature is lower than 20OC, R20 = RT/A..

Where R20—— is the insulation resistance value (mω) when corrected to 20OC.

Rt—— Measure the insulation resistance at temperature (mω).

(2) Measure the voltage ratio of each tap position of the winding. The error of the measured voltage ratio is less than 0.5%, and the manufacturer's value is attached.

Factory voltage ratio test

Maximum error (%) of voltage ratio between high voltage (V) and low voltage (V) at tap position.

1 37625 0.03

2 36750 0.0 1

3 35875 -0.04

4 35000 10500 0.08

5 34 125 0.03

6 33250 0.00

7 32375 -0.06

(3) Measure the DC resistance of the winding at each tap position. Compared with the three measured values of the product at the same temperature, the corresponding change should not be greater than 2%, and attach the test value of the manufacturer.

The factory test data are as follows (17OC)

Xiangbie

Tap high-pressure side and low-pressure side

A B B C C A a b b c c a

1 1.620 1.620 1.620 0.09625 0.09638 0.09625

2 1.582 1.582 1.582

3 1.54 1 1.54 1 1.540

4 1.505 1.505 1.505

5 1.467 1.467 1.466

6 1.430 1.429 1.429

7 1.390 1.39 1 1.39 1

(4) AC withstand voltage test of winding and bushing. The withstand voltage standard is as follows, continuous 1mim.

The voltage frequency duration of the voltage KV applied to the compression part.

High voltage winding 72 50Hz 60S

Low voltage winding 30 50Hz 60S

(5) Carry out no-load test with rated voltage not greater than 130%, and pay attention to the changes of transformer sound and instrument during the test.

(6) The measurement results of no-load current and no-load loss of transformer should be basically consistent with the ex-factory test results, with the ex-factory number attached.

Factory loss measurement

No-load loss (KW) 5 104W No-load current (%) 0.7 1%

The above test shall be carried out at least 10 hour after the transformer is oiled, and the order of the above items shall be maintained during the test.

1.2 transformer inspection.

(1) setting and testing of protection devices such as multifunctional protectors.

(2) Test the action of circuit breaker transmission mechanism and interlock device.

(3) Check the oil level of the oil storage tank, and the connecting valve between the oil storage tank and the transformer must be opened.

(4) Check the reading of the thermometer

(5) inspection? E

Electrical debugging scheme 2

(5) Check whether there are other irrelevant things in the transformer.

(6) The color signs are correct, and the warning signs of dangerous parts are complete.

(7) Distribution panel test and adjustment are qualified.

(8) Check whether all wiring is correct.

(9) Smooth communication.

(10) Will the oil tank be grounded?

(1 1) Is there oil leakage?

(12) When the transformer equipped with multi-function protector is in trial operation, the light gas signal of the multi-function protector is connected to the current trip circuit of the transformer first, and the time limit of over-current protection is set as quick action; Then connect the rated voltage to the transformer for 30 minutes and listen to the sound of the transformer. If possible, the voltage connected to the transformer will gradually increase from zero, so as to find the fault early.

(13) The transformer should be connected to the power supply from the power supply side, because the protection devices of the transformer are mostly installed on this side, and the power supply can be cut off in time in case of abnormal conditions.

(14) After the test, cut off the power supply, readjust the setting value of the overcurrent protection, connect the light gas signal of the multifunctional protector to the alarm circuit, connect the tripping contact to the tripping circuit of the multifunctional protector, and then switch on the transformer at no-load for 3~5 times under the rated voltage, so as to regularly check whether the seals are leaking oil.

(15) If the test result of connecting the transformer to the power supply is good, it can accept the load and put it into operation.

(16) During transformer operation, devices such as temperature indicator and oil level indicator and protective devices (such as multifunctional protectors, etc.). ) should be checked regularly to ensure its reliable operation, and the oil leakage at each seal should be checked regularly.

(17) The phase check must be consistent with the phase of the power grid.

2. Dry-type transformer (SC9 10KV/0.4KV 2000KVA)

2. 1 transformer test

(1) Measure the insulation resistance of the winding and bushing, and the insulation resistance shall not be less than 70% of the ex-factory test value of the product.

The factory test data are as follows (measured at a pressure of 2500V and a temperature of 6OC).

Insulation resistance value (mΩ) of grounding side on pressurization side absorption ratio dielectric loss factor

15S 60S

High voltage winding oil tank 1500

Low voltage winding oil tank 1500

High voltage winding and low voltage winding 1000

(2) Measure the voltage ratio of each tap position of the winding. The error of the measured voltage ratio is less than 0.5%, and the manufacturer's value is attached.

Factory voltage ratio test

Deviation (percentage of tap position voltage ratio (%)

Tap voltage ratio AB/ab BC/bc CA/ca

+5% 26.250 +0.03 +0.03 +0.03

+2.5% 25.625 +0.0 1 +0.0 1 +0.02

0 25.000 -0.02 -0.02 -0.0 1

-2.5% 24.375 -0.07 -0.07 -0.07

-5% 23.750 -0.09 -0.09 -0.09

(3) Measure the DC resistance of the winding at each tap position. Compared with the three measured values of the product at the same temperature, the corresponding change should not be greater than 2%, and attach the test value of the manufacturer.

Factory test data are as follows (6OC)

Resistance ohme(ωω ω) at winding tap position

Winding tap A-B B-C C-A

HV+5% 0.2 163 0.2 160 0.2 166

+2.5% 0.2 103 0.2099 0.2 106

0 0.2046 0.2042 0.2049

-2.5% 0. 1986 0. 1982 0. 1989

-5% 0. 1924 0. 1920 0. 1927

LV a - o b - o c - o

0.000 150 1 0.000 1456 0.000 15 14

(4) AC withstand voltage test of winding and bushing. The withstand voltage standard is as follows, continuous 1mim.

The voltage frequency duration of the voltage KV applied to the compression part.

High voltage-low voltage and grounding 24 50 Hz for 60 seconds

Low voltage-high voltage and grounding 350h60s

(5) Carry out no-load test with rated voltage not greater than 130%, and pay attention to the changes of transformer sound and instrument during the test.

(6) The measured results of no-load current and no-load loss of transformer should have no significant difference with the factory test results (see below for details).

No-load loss and no-load current ratio of low-voltage winding pressurization

100% UN 22 15W 5.00 a 0. 17%

During the test, the above-mentioned project sequence procedures shall be maintained.

2.2 transformer inspection.

(1) Test the action of the transmission mechanism and interlock device of the circuit breaker.

(2) Turn on the fan manually and observe whether it works normally.

(3) Check whether there are other irrelevant things in the transformer.

(4) The color signs are correct, and the warning signs of dangerous parts are complete.

(5) The distribution panel has passed the test.

(6) Check whether all wiring is correct.

(7) Smooth communication.

(8) Before putting into operation, according to the grid voltage, open the closed box and connect the voltage regulator to the corresponding sign (if the grid voltage is higher than the rated voltage, connect the voltage regulator connection line 1 \2; otherwise, connect it to gear 4 \ 5, and connect it to gear 3 when the rated voltage is equal, and then install the closed box to avoid discharge between terminals caused by pollution.

(9) On the low-voltage outlet board, the products are coated with a layer of conductive adhesive when leaving the factory, and can be directly connected when connecting. If the primary side is incoming, please connect the cable to the insulator. If it is incoming wire, the cable support should be firm, and the terminal of the product cannot bear the pressure of large cable.

(10) The grounding of the product must be reliable, and the grounding resistance value should be ≤ 4Ω. Remember not to leave metal foreign objects in the transformer.

(1 1) The phase check must be consistent with the power grid phase.

2.3 Other dry-type transformers shall be tested according to the above steps and combined with the factory data.

3. Voltage transformers (JDZX8-35, JDZX8- 10)

1) Measure the insulation resistance of the primary/secondary winding of the voltage transformer.

The primary winding is opposite to the secondary winding, and the other windings are more than or equal to 500mω； to the ground; Between secondary windings and to ground ≥ 25mΩ

2) Short-time power frequency withstand voltage test

The primary winding is 35KV 72KV and the secondary winding is 27KV.

The voltage between the secondary winding and the ground is 3KV, and the duration is 65438 0 minutes.

3) DC resistance measurement

a)JDZX8-35

Primary winding impedance: A/N/A/B7369Ω

Secondary winding impedance: a, b/a 1, b 1/a2b2/a, n/a 1/a2, N2/da, dn 0.12ω 0.09ω/.

a)JDZX8- 10

Primary winding impedance: A/N/A/B3320Ω

Secondary winding impedance: a, b/a 1, b 1/a2b2/a, n/a 1/a2, N2/da, dn 0.44ω 0.4 1ω.

4) partial discharge measurement

a)JDZX8-35

The measuring voltage is 28KV and the duration is 30S；. The apparent discharge capacity was 7pC.

b)JDZX8- 10

The measuring voltage is 8.4KV and the duration is 30S；. The apparent discharge capacity is 87pC.

5) Induction withstand voltage test

a)JDZX8-35

Applied voltage terminal: Between A and N, the applied voltage is 230 V.

The frequency of test voltage is 150HZ, the induced voltage of primary winding is 80KV, and the duration is 45S, which is normal.

Power receiving scheme

Operation scheme of voltage transformer power test

Electrical installation of Anlong Jinhong Resin120,000 tons/year PVC, 65438+10,000 tons/year caustic soda, installation of transformers and accessories, production and installation of busbars, laying of high-voltage cables, production and installation of high-voltage cable heads, tests of transformers, cables and busbars have been completed, and it is now safe to receive electricity.

The power supply and trial operation of transformer must do the following work:

1. 1. Power transformer test

1. 1. 1. Inspection and preparation before testing:

A. Check nameplate data and other signs for errors, mechanical damage and complete accessories.

B carefully check whether there are cracks and defects in the high and low voltage porcelain bottles, and remove the dust on them.

C. Dismantle the high and low voltage buses of the transformer, and prepare the current facilities for field test and related test equipment, instruments, application tools and connecting wires.

D. During the test, ensure that the shell of the tested object is reliably grounded.

1. 1.2. Measure the DC resistance of winding and bushing. The difference between the measured values of each phase should be less than 4% of the average value, and the difference between the measured values of lines should be less than 2% of the average value. After measurement, compared with the measured value of the product at the same temperature, the corresponding change should not be greater than 2%. After field measurement, the transformer is qualified before it is allowed to receive electricity.

1. 1.3 Check the ratio of all taps, and there should be no obvious difference with the nameplate of the manufacturer.

1. 1.4 check the three-phase wiring group of the transformer, which must meet the design requirements, the marks on the nameplate and the shell symbols. Transformers running in parallel must be in the same group, and the transformers of Jinhong Resin are all Dyn 1 1.

1. 1.5 Measure the insulation resistance and absorption ratio of the winding and bushing, which shall be no less than 70% of the factory test value of the product.

1. 1.6 AC withstand voltage test of winding and bushing. There should be no breakdown and discharge during the test, and the insulation is good after withstand voltage. (Note: AC withstand voltage test of oil-immersed transformer winding must be conducted after insulation oil withstand voltage or physical and chemical test is qualified. )

1. 1.7 Measure the insulation resistance of the fasteners insulated from the core and the lead-out sleeve of the core grounding wire to the shell.

1. 1.8 Check that the phase should be consistent with the power grid. There shall be no abnormality in five impulse closing tests under rated voltage.

1. 1.9 Before commissioning of the transformer, all test data shall be submitted to Party A for verification, and commissioning can only be carried out after Party A agrees.

1.2, Power Cable and Bus System Testing

1.2. 1 power cable test

(1) Measurement of insulation resistance-specific requirements shall be written.

(2) DC withstand voltage test and leakage current measurement (see GB 50150-91)-specific requirements should still be stated.

(3) Cable phase inspection

1.2.2 high voltage insulator and bus system test

(1) The specific requirements for insulation resistance measurement shall be written.

(2) Power frequency AC withstand voltage test (see GB 50150-91)-specific requirements should still be stated.

1.3, Circuit Breaker Test

(1) insulation resistance; -or you should write specific requirements.

(2) Contact resistance of the contact; -or you should write specific requirements.

(3) closing time and fixed opening time; -or you should write specific requirements.

(4) switching on and off at high and low working voltages; -or you should write specific requirements.

(5) the power frequency withstand voltage of the circuit breaker; -or you should write specific requirements.

Power receiving scheme 1

1.4, load switch, disconnector, high-voltage fuse, wall bushing, high-voltage bus and supporting insulator

(1) The specific requirements for insulation resistance shall be written.

(2) Power frequency withstand voltage-or specific requirements should be written.

1.5, valve arrester

(1) The specific requirements for insulation resistance shall be written.

(2) The specific requirements for leakage current should be written.

(3) Power frequency breakdown voltage-or specific requirements should be written.

1.6, capacitor test

(1) The specific requirements for insulation resistance and absorption ratio shall be written.

(2) Power frequency withstand voltage-or specific requirements should be written.

(3) Capacitance

1.7, secondary circuit

(1) relay protection setting

1.8, transformers and meters

(1) The specific requirements for transformer insulation resistance shall be written.

(2) DC voltage of primary winding of voltage transformer

(3) Ratio, wiring group and characteristics

(4) Power frequency withstand voltage of transformer

(5) Accuracy inspection of main instruments

1.9, grounding system

(1) The specific requirements for grounding resistance shall be written.

1. 10, safety tools

(1) Power frequency withstand voltage of pull rod, electroscope, insulating gloves, insulating boots and insulating boots.

2. Trial operation

2. 1, preparation before commissioning

(1) Dismantle all equipment, power distribution room, power distribution room, control room and other places. Except for instruments, tools and spare parts necessary for trial operation, toolboxes, installation materials, work clothes and waste materials shall not be piled up.

(2) Complete the safety tools that have passed the inspection, such as tie rods, electroscope, insulating gloves, insulating boots, temporary grounding wires, etc.

(3) Equipped with sufficient fire-fighting equipment. The power distribution room must be equipped with a carbon dioxide fire extinguisher. Foam extinguisher is not allowed, and it is best not to use dry powder fire extinguishers.

(4) Set warning signs such as "Electrical Danger" and "It is forbidden to switch on when someone is working". At the same time, set up a cordon, and non-related personnel are not allowed to enter.

(5) Prepare spare parts, spare parts and special tools.

(6) Check that the grounding of each part is good, the phase color of the main circuit is accurate, the screws are tightened well, the insulation of the high and low voltage main circuits is not abnormal, and install the low-voltage air switch arc extinguishing cover.

(7) The commissioning plan, including the emergency plan, shall be disclosed to the commissioning personnel.

2.2. Necessary conditions for debugging

Power receiving scheme 3

The voltmeter on the incoming cabinet should indicate that the voltage of each phase is normal.

(9) If there are two or more transformers in the system, and the corresponding low-voltage cabinet has two or more buses, after confirming that the low-voltage bus switch is disconnected, put the transformers into operation one by one in the order of (7) to (8) and send them to the voltage power supply one by one, and check the phase sequence of each phase bus at the low-voltage bus switch. Use a multimeter to AC 450V or 500V, and measure the low voltage of each bus in the same phase. The voltage of different phases must be close to 0 V. ..

According to the transformer distribution and power supply characteristics of Anlong Jinhong Resin, there are two transformers in the caustic soda main control building and polymerization control room, which must be combined according to the above method to ensure the correct phase sequence. At the same time, there are only 1 transformer in other processes. In order to improve the reliability of power supply, voltage connecting cables are added in the whole plant. The low-voltage connecting cables are as follows: acetylene process-lithium bromide circulating water substation, soft water station-lithium bromide treatment device with chlorine and hydrogen, compressed nitrogen-* * * substation, polymerization substation-drying substation. According to the above method, install it in the low-voltage wiring cabinet.

(10) If the measured value is abnormal, all transformer cabinets must be stopped in reverse order, and then the grounding wire is discharged, and then the reason is found and corrected.

If it is stipulated in the construction specification that high-voltage buses can run in parallel, if the phase sequence in the above (6) and (9) is correct, and the voltage difference of each bus is not more than 2.5%, the disconnector and circuit breaker of the bus should be closed in turn for multi-channel operation.

If the construction specification stipulates that two power supplies are in use and one for standby, parallel debugging operation is not allowed. If the difference between the two buses exceeds 2.5%, parallel trial operation is not allowed.

(1 1) Trial transmission of high voltage load: 1. Check whether the load is normal, such as high-voltage motor during drying. After the load inspection, close the high voltage cabinet trolley and circuit breaker, and send power to the load equipment for trial operation; 2. Immediately after closing, observe whether the load current indicator is normal and whether the load runs well. If it is not normal, stop immediately.

(12) low-voltage load trial transmission; In addition to the above (1 1), it is also necessary to check whether the insulation of the load control equipment is good and whether the action is normal, and the trial operation can only be carried out after everything is normal.

2.4, commissioning on duty

(1) After the debugging program is completed normally, it can be handed over to the debugging personnel for regular patrol on duty.

(2) There are at least two people on duty for debugging, one of whom must be an electrician above level 3.

(3) The personnel on duty must always patrol all relevant parts of the power transformation and distribution project to check for abnormal sounds, flashes, smells and temperatures. And check whether there is any abnormality indicated by the pointer. If there is any abnormal situation, it must be handled in time. If necessary, follow the correct steps to turn off the power supply.

(4) The personnel on duty shall read the meter every 2 hours, and the main items recorded include: high voltage, low voltage, high current, low voltage current, transformer current, transformer temperature, active power, reactive power, ambient temperature and whether there is any abnormality.

(5) Commissioning on duty for 24 hours can be officially put into commissioning without any abnormality, and the commissioning record on duty should be handed over together with the project as one of the completion handover materials.

Power receiving scheme 4

Attached Table: Distribution of High Voltage Switchgear, Transformer Switchgear and Their Bus Sections

AH 1 PVC drying high voltage motor

Section I bus of AH2 high-voltage incoming cabinet (10KV)

AH3 PVC circulating water transformer 1250kVA I section bus (10KV) has a low-voltage incoming cabinet.

AH4 soft water transformer 1600 KVA I section bus (10KV) has a low-voltage incoming cabinet.

The bus (10KV) of 630KVA section of AH5 hydrogen treatment transformer has a low-voltage incoming cabinet.

The bus bar (1250kVA I) of AH6 refrigeration transformer has a low-voltage incoming cabinet.

AH7 lithium bromide circulating water transformer 1250kVA I section bus (10KV) has a low-voltage incoming cabinet.

The AH8 polymerization transformer 1# transformer1250kVA Ⅰ bus (10KV) has low-voltage disconnectors.

AH9 bus TV Ⅰ bus (10KV)

AH 10 sectionally isolates the I section bus (10KV) and the II section bus (10KV) of the circuit breaker.

AH2 1 segmented isolation handcart

AH 17 *** transformer 630KVA bus (10KV)

AH 18 1# I bus of generator set (10KV) (not constructed by us)

AH 19 rectifier power transformer 1000KVA (not built by us)

AH20 1# transformer I bus (10KV)

AH22 bus TV Ⅱ bus (10KV)

AH23 Polymer 2# transformer1250kVA II bus (10KV) has low-voltage disconnector.

AH24 acetylene transformer1000kva Ⅱ busbar (10KV) with low-voltage disconnector.

The 630KVA bus (10KV) of AH25 electrolytic transformer has a low-voltage incoming cabinet.

The 2000KVA bus (10KV) of AH26 chlorine gas treatment transformer has a low-voltage incoming cabinet.

AH27 lithium bromide transformer1600kva Ⅱ bus (10 KVA) has a low-voltage incoming cabinet.

AH28 air-compressed nitrogen transformer1600kva Ⅱ section bus (10KV) has a low-voltage incoming cabinet.

AH29 High-voltage Incoming Cabinet Ⅱ Bus (10KV)

AH30 standby high-voltage cabinet

Section Ⅱ busbar of transformer for AH3 1 2# (10KV)

AH32 PVC dry-type transformer1600kva Ⅱ bus (10KV) has a low-voltage incoming cabinet.

AH33 1# Generator Set Ⅱ Bus (10KV) (not constructed by us)