Boiler ESP System Commissioning Procedure

Compiled by:

Audited by:

Approved by:

Qingdao Huachen Weiye Electric Power Technology Engineering Co., Ltd.

2014

Catalogue11

1Introduction

12

63

6Commissioning Basis

74

7Commissioning range

75

7Commissioning Conditions

106

10Commissioning Methods and Steps

247

24Commissioning Quality Check standard

248

24Commissioning Records

259

25Organization and Divisions

2510

25HSE Control Measures

1 Introduction

The commissioning of electronic precipitator is to check if the voltage endurance capacity of all the HV insulation components should be as required; make sure the anode and cathode rapping device rotary pars and bearing parts are in normal condition; the rapping reduction gear is in normal operation; by checking the strictness and integrity of the proper, gad ducts, manholes and so on parts to give guarantee for the electronic precipitator in whole-set trial-run.2 Zambia MCL 2150MW Coal Fired Power Plant( MCL 2150MW)2510t/h150MWZambia MCL 2150MW Coal Fired Power Plant is provided with two sets of 510t/h super high pressure, natural circulating CFB steam drum boilers, which is single furnace, single medium reheating, thermal isolation cyclone separator, tube-type air preheater, balanced draft, end part double flue, suspension structure, half-unsheltered layout, solid state deslagging, complete steel structure, matched with 150MW condense turbine-generator. 621126Zambia MCL 2150MW Coal Fired Power Plant is provided with two sets of 510t/h super high pressure, natural circulating CFB steam drum boilers, which is single furnace, single medium reheating, thermal isolation cyclone separator, tube-type air preheater, balanced draft, end part double flue, suspension structure, half-unsheltered layout, solid state deslagging, complete steel structure, matched with 150MW condense turbine-generator. The boiler adopts CFB combustion and limestone desulfurization technique that low pollution and high efficiency.Each boiler is matched with two sets of centrifugal IDF, controlled by damper and hydraulic coupling; two sets of centrifugal PAF, controlled by damper and hydraulic coupling; two sets of centrifugal FDF; controlled by damper and hydraulic coupling; three sets of HP fluidized blower, controlled by motor butterfly damper and hydraulic coupling, which are all produced by Shanghai Blower Works Company.2.1 BMCRBoiler main technology parameters in BMCR name unit value

BMCRt/h510

superheaters outlet steam pressure MPa14.32

superheaters outlet steam temperature 540

reheating steam flowt/h420.42

reheaters inlet steam pressure MPa2.85

reheaters otlet steam pressure MPa2.7

reheaters inlet steam temperature 334

reheaters outlet steam temperature 540

ECON inlet FW temperature

TRLboiler guaranteed heat efficiency (LHV, TRL)%90

2.2 Main accessory equipments sepcifications 1.1 IDF spec. IDF model1854AZ/1745

Qty./2

air flowNm3/h425020

total pressurePa7700

speedRPM980

manufacturerShanghai Blower Works Co., Ltd.

motor rated vol.v6600

motor rated powerkw2100

motor manufacturer Xiangtan Motor Factory

1.2 PAF spec. PAFmodel2378AB/1160

Qty./2

air flowNm3/h215850

total pressurePa26830

speedRPM1480

manufacturerShanghai Blower Works Co., Ltd.

motor rated vol.v6600

motor rated powerkw2050

motor manufacturer Xiangtan Motor Factory

1.3 FDF spec. FDF model2248B/1065

Qty./2

air flowNm3/h186610

total pressurePa18550

speedRPM1480

manufacturerShanghai Blower Works Co., Ltd.

motor rated vol.v6600

motor rated powerkw1480

motor manufacturer Xiangtan Motor Factory

1.4 HP fluidizing fans spec

HP fluidizing fans modelC155-1.5282/0.930

Qty./3

air flowNm3/h7500

total pressurePa61100

speedRPM2980

manufacturerShanghai Blower Works Co., Ltd.

motor rated vol.v6600

motor rated powerkw220

motor manufacturer Xiangtan Motor Factory

2.3 Fuel conditions 1.4 coal materials Description Range of Coal AnalysisCoal Analysis

PerformanceWorst

Proximate Analysis (ADB)

Ash % 45.3 to 53.2748.353.27

Volatile Matter (ADB)%19.6 to 18.0518.818.08

Fixed Carbon (ADB)%33.7 to 27.4731.5527.44

Inherent Moisture (ADB) %1.4 to 1.211.351.21

Total Moisture%1.9 to 2.11.92.1

Normal Heating ValueKcal/kg4059 to 299035003110

Ultimate Analysis

(as received basis)

Carbon (C)%42.8 to 37.0637.533.26

Hydrogen (H2 ) %n2.81 to 2.332.452.33

Nitrogen (N2)%0.93 to 0.720.850.72

Oxygen (O2)%6.45 to 6.086.206.34

Sulphur (S)%1.0 to 2.01.7*1.7*

Moisture (H2O)%1.43 to 1.24 1.902.1

Ash %45.3 to 53.2549.453.55

Gross calorific value (as received basis) Kcal/kg4039 to 319135803191

Hard grove indexHGI 5959 59

Ash Analysis

Silica (SiO2)%61.7 to 61.1361.0861.13

Alumina (A12O3 ) %31.0. to 30.8930.5230.89

Iron Oxide (Fe2O3) %4.8 to 3.634.103.63

Titanio (TiO2) %3.00 to 3.443.13.44

Phosphoric Anhydride (P2O5)%0.50 to 0.370.430.37

2.4 ESP spec. No. itemunit value or contents

1 ESP model 2FAA6*45M-1*144-150

2 ESP inlet flue gas flowm3/h152.10 m3/s 3% worst coal and S content 3%

3 inlet flue gas temperature 142.38

4 inlet dust content g/Nm364.21/89.5design/check coal

5 ESP efficiency 99.94

6 Proper resistancePa 200Pa

7 Proper air leakage coefficient 2

8 noise dB(A) 85

9 Total specific collection area m258320

10 valid section aream2216

11 length and height ratio /1.8

12 /chamber/filed 1/6

13 homopolar spacemm400

14 total anode area and typem229160/stereotype 480C

15 Total discharge electrode length of ESP m barbed lines 24300m/helix 9720m

16 cathode line type and material RSB barbed lines1-5fieldsSPCC/helix6 6th field316

17 flue gas hasten speedcm/s4.08

18 flue gas speed m/s0.7

19 designed shell positive and negative pressure kPa+9.8 ,-11.2

20 shell materials and spec. Q2356mm

21 Each ESP ash bucket Qty 36

22 Anode vibrating mode side mechanical

23 cathode vibrating mode side mechanical

24 ash buckets Qty. /36

25 ash buckets volume m3104.5

26 material level meters Qty. /72

3 Commissioning BasisDL/T5437-2009Code for Fossil Power Construction Project from the Unit Commissioning to Completed Acceptance DL/T5437-2009DL5009.12002Code for Construction Acceptance and Evaluation of Electric Power Construct. Part 2: Boiler Unit by NationalEnergy Administration DLT 5210.2-2012[1996]111Standard for Quality Inspection and Evaluation on the Commissioning of ThermalPower Plant (1996 version)1996Regulations on the Start-up Commissioning of Thermal Power Plant Projects (1996 version)DL/T852-2004Guide for Boiler Start-Up Commissioning Test byNDRC DLT852-2004DL/T5047-95Code for Construction Acceptance and Evaluation of Electric Power Construct. Part 2: Boiler Unit DL/T5047-95GB1018488"Power Plant Boiler Performance Test Regulations" (GB1018488)

"Safety Work Regulations for Electric Power Industry" (Thermal and Mechanical Part)Manufacture and design drawings, equipments erection and manuals. 4 Commissioning rangeESP proper, cathode and anode rapping systems, electric heater, HV rectifier transformer5 Commissioning Conditions 5.1.The ESP proper, equipments and systems have been installed, the process and erection quality be as required by the manufacturer and designer. Supply the erection records and technical materials in document pact.5.2. Site clean, pathway smooth, railings complete and illumination adequate.5.3.All the electric ceramics have gone through the voltage withstand tests before installation. Every part is clean, the insulator chamber with no water, and field is clean with qualified insulation.5.4.After commissioning, the HV and LV electric equipments are as required. The HV cables have passed the voltage withstand tests. The electric circuits connection checked correct. The HV control cabinets have passed the energizing tests and regulation, with correct motion directions, and the local and remoter operations should be smooth and reliable.5.5.There is no stuff with flammability and explosion potential at or around the trial-run site, and there are adequate fire-fighting devices at the site.5.6.There is no stuff with flammability and explosion potential at or around the trial-run site, and there are adequate fire-fighting devices at the site.5.7.The electronic ash hopper and storage pump have installed, the intake flange and valves holes are strict with no leakage. The ESP should be qualified in the strictness test.5.8.Before insulate the ash hopper electric heating device, conduct the energizing test first, making sure every thing is OK, then proceed to finish the outer shell insulation work.5.9.ESP is running in HV, so the HV equipments should all be earthed reliably.5.10.ESP outer shell and HV rectifier transformer anode cable should be complete and fixed.5.11.All the porcelain casings are stable in contact and receive even pressure. Each porcelain should be kept clean and dry.5.12.HV isolating vale actuator is flexible and precise.5.13.400VHV isolating vale actuator is flexible and precise.5.14.LV operation control devices have passed the energizing test. (The check of alarming system, rapping circuit, soot removal circuit, heating and temperature probe circuits.)5.15.Site equipments and systems have been named, numbered and hanged with nameplates. The operators are in position. All the needed tools, drawings and forms are complete.5.16.All the pressure, temperature and flow gauges have been checked qualified and all in normal operation. 5.17.5.1 All the pressure, temperature and flow gauges have been checked qualified and all in normal operation. 6 Commissioning Methods and Steps6.1 Commissioning steps6.1.1.ESP HV power supply device energizing test.6.1.2.Break the main circuit switch, and cut off the power, make sure no person inside the ESP and around the HV silicon rectifier.6.1.3.Connect the isolating valve to the electric field position.6.1.4.Connect in the main circuit power and switch on the main circuit switch.6.1.5.Push the controller operation button and send the equipments in operation.6.1.6.The primary pressure, primary current, secondary pressure, and secondary current indications should be change along with the change of the angle of flow.6.1.7.5%The correspondence between the secondary pressure, secondary current indicated value on the controller and on the secondary gauge should not over 5% after calibration.6.2 Protection function test6.2.1 Secondary open circuit protection6.2.1.1.Break off the main circuit switch and cut off the power. 6.2.1.2.Switch the isolating valve to open circuit position.6.2.1.3.Connect in the main circuit power and switch on the main circuit switch.6.2.1.4.Press the operation button on the controller and send the equipments in operation.6.2.1.5.070KVCheck the indicative value of the primary pressure and current, secondary pressure and current on the HV control cabinet. Normally, the primary and secondary current should be about zero; secondary pressure at about 70KV. After a while the HV control cabinet should be able to start the secondary open circuit protection trip.6.2.2. Output short circuit protection6.2.2.1.Break off the main circuit switch and cut off the power.6.2.2.2.Break off the main circuit switch and cut off the power.6.2.2.3.Connect in the main circuit power and switch on the main circuit switch.6.2.2.4Press the operation button on the controller and send the equipments in operation.6.2.2.5.00Check the indicative value of the primary pressure and current, secondary pressure and current on the HV control cabinet. Normally the primary and secondary current should not be zero and the second current is zero. After a while the HV control cabinet should be able to start the output short circuit protection trip.6.2.3.Bias excitation protection6.2.3.1.Take off one controllable silicon triggering signal.6.2.3.2.Load the equipments with normal load.6.2.3.3.Connect in main circuit power source and switch on the main circuit switch.6.2.3.4.Push the operation button on the controller and keep the equipments in operation.6.2.3.5.30%When the secondary current exceeded 30% of the rated value, the equipments should be able to start the bias excitation protection trip.6.2.4.Controllable silicon open-circuit protection.6.2.4.1.Take off two Controllable silicon triggering signal6.2.4.2.Load the equipments with normal load.6.2.4.3.Connect in main circuit power source and switch on the main circuit switch.6.2.4.4.Push the operation button on the controller and keep the equipments in operation. After a while, the equipment should be able to start the Controllable silicon open circuit protection.6.2.5.Output under-voltage protection6.2.5.1.Load the equipments with normal load.6.2.5.2.Connect in main circuit power source and switch on the main circuit switch.6.2.5.3.Push the operation button on the controller and keep the equipments in operation.6.2.5.4.25KVUse the stop and down move button on the operation controller and keep the output voltage under 25KV. After a while, the equipment should be able to start the output under-voltage protection trip. 6.2.6.Alarm of critical oil temperature7585The controller should send out the alarm of critical oil temperature when the oil temperature of the rectifier transformer over 75 but below 85 (simulate with resistance box). 6.2.7.Alarm of emergency oil temperature85The controller should send out the alarm of critical oil temperature when the oil temperature of the rectifier transformer over 85 (simulate with resistance box).6.2.8.Alarm of light gasThe controller should be able to send out the alarm of light gas when the rectifier transformer air breaker light gas signal activated. 6.2.9.Alarm of heavy gasThe controller should be able to send out the alarm of heavy gas when the rectifier transformer air breaker heavy gas signal activated.6.3. Static no field boosting test6.3.1.The condition for conducting the static electric field boosting test: rapping system and induced draft fan not in operation, and the electric field is static and no gas or air admission.6.3.2.24The electric heater should be in operation for 24hrs before the test.6.3.3.Block all the manholes of the ESP and hang on the OPERATION sign.6.3.4.Start the static no field boosting test stage by stage from the last stage of the field.6.3.5.Make sure the main circuit switch off and the main circuit power have been cut off.6.3.6.Temporary install static high tension voltmeter at the high voltage side of the rectifier transformer.6.3.7.Under the instruction of the site commander, switch the isolating valve at the field position.6.3.8.Under the instruction of the site commander, switch the isolating valve at the field position.6.3.9.Push the operation button on the controller and keep the equipments in operation.6.3.10.IUse the button on the control panel to boost the voltage to rated value. Calibrate the secondary pressure indicative value on the control panel along with the indicative value on static high tension voltmeter. At the same time, calibrate the secondary ammeter according to the feed back resistance voltage. After the calibration, lower down the electric field voltage, and switch off the main circuit switch, and break the isolating blade, earth the rectifier, take off static voltmeters, and then recover the rectifier transformer output and isolating blade. Boost the voltage in electric field I with one transformer. Monitoring the secondary ammeter indicative value till it reached to the rated value, keep the records.IOperations on other filed single transformers voltage boosting the same as operation on filed I. 6.3.11.05KVUse the buttons on the control panel, keep one group of secondary voltage and current when the current not zero and the secondary voltage raise every 5KV. The test finished when the secondary voltage or secondary current reached the rectified value.6.3.12.During the test, record the voltage and current of the field discharge inception and flashover. Record the current under different voltage of each field and make volt-ampere characteristics.6.4. The boosting test of the two power supply field in parallelThe selection of the capacity of HV Controllable silicon rectifier transformer is based on the plate and line current density and the voltage puncture value of the ESP under flue gas flow condition. If the air current density increased because of the no-field boosting test, and one high voltage rectifier transformer not capable of supply for single electric field, that is secondary current been locked after reached the rated value and secondary voltage cant reach the filed puncture value, then, two high rectifier transformers with same capacity could be used to supply power for one field.6.4.1.The parallel power supply test should be conducted after the boosting test of one high voltage rectifier transformer supply one electric field have been succeed.6.4.2.500mmTo parallel the two transformers by regulate the phases of the primary powers to be the same and connect the two transformers by leads with over 500mm discharge separation.6.4.3.For the parallel power supply test, two persons are needed to startup and operate the two control panels at the same time to boost the voltages. If the sum of increased current values not reached the rated value, continue to boost voltage till the electric field has flash over. Here the secondary current would be equal to the sum of the two high voltage rectifier transformer currents. Secondary voltage would be the average value between the two transformers. Record the voltage ampere characteristics at the same time.6.4.4.6Conduct boosting test for 6 fields.6.5. Commissioning of cathode, anode and distribution rapping systems.For the safety sake, the trail run the cathode, anode and distribution rapping systems should be conducted before putting the ESP in operation. Make sure the drive and rapping devise are in good ready to operation condition.6.5.1.Check before the cold commissioning6.5.1.1.Check the hammers and anvils of the cathode, anode and distribution plate be in correct position. The bearing and hammer could be freely rotated.6.5.1.2.Check the rapping speed reduction motor with correct direction, flexible rotating, proper chain, each lubricating part has been oiled, oil in the redactor is qualified and the oil level above the intermediate line.6.5.1.3.The insulator chamber should be clean with no impurities. The leads are in good contact and high voltage porcelain vases with no dust.6.5.1.4.Make sure no one is inside before closing all the manholes on the proper, in the insulator chamber and ash hopper.6.5.1.5.Put the on-line meters (protection systems, adjusting devices, temperature probe devices, alarm devices and indicator light) in operation.6.5.1.6.The wiring of the rapping motors and earthing leads have been fixed stable. The safety collar has been installed and has no contact with the rotating parts.6.5.1.7.The calibration of ESP control circuit and alarm signals are qualified.6.6. Put cathode, anode and distribution rapping systems in operation.6.6.1.Loose the shaft coupling of the rapping system, hand start the motor, making sure the direction is correct, measuring the starting current and no-load current.6.6.2.Loose the shaft coupling of the rapping system, hand start the motor, making sure the direction is correct, measuring the starting current and no-load current.6.6.3.After the test, recover the shaft coupling, make sure the control cabinet, power distribution cabinet in good condition. Energize the power of cathode and anode rapping system, hand start them for trial run. Push the emergency button to stop the system when the motor reached the full speed. The local personnel should make sure the rapping systems should be in the correct direction. after the checking finished, restart the rapping systems, record the starting current and measuring the tri-phase current.6.6.4.The rotating parts and bearings are in normal rotating with no abnormal noise. The temperature of rapping motor and bearing are normal. Reducer has normal oil level with no oil leakage. The mechanical safety lever has no rupture.6.6.5.Regulate the rapping interval according to the different electric field of the ESP.6.6.6. During the trial-run, regularly check the rapping shaft rotating, make sure there is no stuck, and hammer, anvil and rapping are in correct position with no mistake. Observe the oil level change in the redactor.6.6.7.4The trial-run should last at least 4 hours.6.7. ESP electric heater energizing test6.7.1.Calibrate the heater temperature probe circuit and alarm system, make sure the circuit and alarms are correct and in good condition. 6.7.2 50M2000VBefore energizing, the insulation resistance should be tested qualified and the alternative current voltage withstand test be finished. The insulation resistance should be 50M, AC voltage withstand test values: AC 2000V, no flashover and puncture for one minute.6.7.3.On the heater control panel, put the switch on stop position.6.7.4.Switch on the circuit power switch.6.7.5.Turn the changeover switch on the Manual position. One heater or motor in continue operation.6.7.6.Put the electric heater in operation, check if there is any open circuit, fast temperature rising, and make sure the temperature range is correct.6.8. Hot startup of the ESP6.8.1.Checking before hot startup.6.8.1.1.The inlet and outlet gas ducts have finished erection and are ready for operation.6.8.1.2.heck the insulator chamber should be clean, and the leads contact is good, high voltage porcelain vase has no dust, and the damping resistance is complete with no damage.6.8.1.3.Check the earthing blade mechanism in the insulator room is flexible with no abrasion, and operate correct.6.8.1.4.Make sure no one stay inside the ESP, and strictly block the manholes, electrical insulator room manholes and ash bucket manholes. 6.8.1.5.All the equipments and components are complete with clear and correct sign. The joint surface is close with no leakage. The insulations are complete with clear outlook. The illumination is adequate.6.8.1.6.All the gauges, power switches, protection systems, governor systems, temperature probe systems, alarm systems and indicator lights are normal, and the power is on.6.8.1.7.Inside the LV distribution panel, all the switches and rapping devices are good, all the power and operating fuses are in good condition6.8.1.8.Ash conveying system in operation.6.8.1.9.The oil of the rectifier transformer is clear, with no turbidity, no impurity and no leakage. The oil level is normal.6.8.1.10.Boiler flue gas system auxiliary units are in operation.6.8.2 Hot startup of the ESP6.8.2.1.Before boiler ignition, put the ash hopper heating device and insulator heating device into operation.6.8.2.2.Before boiler ignition, supply power to cathode and anode rapping system and put them into continuous operation.6.8.2.3.During primary ignition, if put in the high voltage, the oil gas might adhere to the plate and the wires and cause corrosion, affect the efficiency of the dust removal. Therefore put in the high voltage after the oil break.6.8.2.4.2030Heating the insulator to 2030 above the dew point temperature, then put the rectifier transformer into operation.6.8.2.5.After boiler is changed to full coal combustion, put in the rectifier transformer from the first electric field. Push the button and auto boost the voltage to the rated value.6.8.2.6.Put the continuous rapping device at the program rapping position and at the same time, stop the operation of the insulator heating device.6.8.2.7.Keep patrolling and check the operation of the rectifier transformer, control cabinet, ESP proper, and rapping systems.6.8.2.8.During the operation, the dust ducts, manholes should be strict and with no air leakage6.8.2.9.Regularly observe the change of secondary current and pressure, master the operation condition of the ESP for the convenient of in time adjust. At the meanwhile, adjust the parameters of secondary current and pressure of each filed and the rapping intervals according to the boiler combustion, coal quality and ash content.6.8.2.10.During the operation, its prohibited to enter the energized high tension cell and open the energized high tension insulator room to check. 6.8.2.11.The change over of the HV isolating blade should not be under loaded. Stop the high voltage rectifier for change over; restart it after the changeover.6.9. Outage of the ESP6.9.1 Stop the operation of the rectifier transformer.6.9.1.1.Push the stop button on the HV control panel and stop the rectifier transformer.6.9.1.2.Turn the key switch on the rectifier transformer control cabinet to open position.6.9.1.3.380VCut off the HV control cabinet 380V power switch.6.9.1.4.Cut off the high voltage control panel operating power.6.9.1.5.Switch the HV isolating blade at the earth position6.9.2. Put the rapping system in continuous operation.6.9.3. 8Stop the rapping system after the boiler stop operation for 8 hours.6.9.4. Stop the ash hopper heater after the hopper confirmed has no ash. hours.6.9.5. When the boiler is emergency stopped and combustion extinguished, stop the rectifier transformer at once.6.9.6. Stop the HV rectifier transformer, first lower the voltage to zero, and then push the stop button.6.9.7. Boiler stop for short time, the insulator chamber, ash hopper heater should go on operation.7 Commissioning Quality Check standard7.1.The rotating parts and bearings of the cathode and anode rapping devices are in good operation condition and with no noise. 7.2.Rapping redactor bearing temperature is in normal operation with no oil leakage, the chains are in proper tensity.7.3.,No abrasion in the rapping bearings. And the hammer position is correct.7.4.The rectifier transformer is in normal operation with no oil leakage or over temperature.7.5.The HV power supply devices are in normal operation and the protection functions are correct.7.6.No air leakage to the ESP proper, gas duct, manholes and so on.7.7.The control circuits, indicator lights, signal lights, alarms are in normal operation.8 Commissioning Records8.1 The problems and solutions in commissioning. 8.2 ,Relevant inform bills, and design deviation bills.9 Organization and Divisions9.1 Erection unit takes charge in organizing partial trial run, supervising equipments, supplying and cutting power, removing defects, lighting, establishing scaffolds and erecting temporary facilities. 9.2 Produce unit takes charge in starting and stopping equipments, regulating running and handling accidents as operation regulations and the procedure required. 9.3 Commissioning unit takes charge in compiling trial run measures (procedures), technology instructing, recording, collecting and analyzing data and compiling commissioning reports. 9.4 Manufacturers take charge in test and adjustment on site. 9.5 During test, clear each unit contacts and according to site situations, each unit appoint proper person for cooperation. 10 HSE Control Measures10.1. 400VFrom the application of the energizing test on, the ESP transformer 400V switches should be regarded as energized, and no one should touch them.10.2. When energizing the primary equipments, special personnel should be on watch, and stop the test at once if any abnormity be found. Continue the test, after the causes be found and eliminated.10.3. The test should be united leaded. No tester should change the procedures with out permission. If changes needed, report to the commanding personnel, and after permitted, operate under the command.10.4. ,,Mark the energized equipments; put isolating devices between energized equipments and equipments under construction.10.5. During the static no-field boosting test, special personnel must be sent to watch over the HV rectifier transformer operation.10.6. Static HV voltmeter outer shell should be firmly earthed. And the high voltage testing area should have effective isolating devices and be enclosed by red-white band.10.7. Send security personnel to guard the ESP boosting testing area, and no outsider should enter it.10.8. ,6kV,Lock the energized switch room. The operators should strictly follow the work bill system. The 6KV switch room should be prepared with safety appliance, such as: insulating gloves, insulating shoes, special earthing leads, high voltage electroscope.10.9. Reclaim all the used batteries produced during the energizing process, to protect the environment.10.10.Keep the fire-fighting devices in good condition. The fire-fighting appliance should be in reasonable places and with clear marks. Relevant fire-fighting and security personnel are in position.10.11.To avoid the high voltage electric shock, its prohibited to open the manholes if the ESP in operation.1