230kv outdoor switch yard distribution devices

7/27/2019 230kv Outdoor Switch Yard Distribution Devices

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Content

1. Project Profile and Construction Quantity ........................................................................ 2

2.

Compiling Basis .................................................................................................................................... 4

3. Conditions and Preparation before Construction ......................................................... 5

4. Construction Program and Method ...................................................................................... 12

5 Quality Control Arrangement and Quality Defect Precautions .. 39

6 HSE ................................................................................................................... 42

7 Annex .......................................................................................................................................................... 52


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1. Project Profile and Construction Quantity

1.1 Project (System or Equipment) Profile

2150MW 230kV 230kV

- 230kV 230kV

/

230kV

For this 2150MW unit project, the double-loop line is defined for the new-built power plant.

230kv distribution device will be newly erected in power plant. The units will connect with 230kv

distribution devices by generator-transformer type. Double bus bar wiring and two groups bus bar

working at the same time will be adopted for 230kv distribution devices; parallel operation will be

implemented through bus bar contacting circuit breaker. The power and load will equally distributed

on the two groups bus bars. The start-up and standby power will come from 230kv distribution

devices of this power plant.

230kV ZF11-252 GIS 2 2 1 /

PT 1 7

For 230kv distribution devices, adopting ZF11-252 type GIS, setting 2 loops of inline bays, 2

loops of outline bays, 1 loop bay for start-up/standby transformer, 1 bay shared by PT, 1 loop for

bus bar coupler. After this phase completed, there are totally 7 bays.

/ 230kV

The overhead conductor will be adopted for the connection between two sets of main

transformer and start-up/standby transformer to 230kv distribution devices.

230kV DMCI

DMCI is in charge of 230kv switch yard construction. Drawings from HBEDI are the

construction technology basis. Contents from this methodology and relevant national legislation and

specifications will be adopted to instruct the whole progress of this construction items.

1.2 Construction Quantity and Time Limits

1.2.1

Construction Quantity


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No.

Items

Specification and

Model

Unit

Quantity

Manufacturer

Remarks

1Oxide zinc lighting arrestor Y10W5-200/520W

Set

/

Matched

lightningarrestortester

2

Tension insulator

chain(single conductor)

16(XWP2-160) Set /

/

3

Tension insulator chain

(double conductor)

16(XWP2-160) Set /

4

V

V type suspension insulator

(double conductor)

17*2(XWP2-70) Set /

5Suspension insulator chain(double conductor)

16(XWP2-70 Set /

/

6

Tension clamp

NYG-400/35A Set/ /

7

Suspension clamp CGB-5 Set / /

8

Steel core aluminum

conductor

LGJ-400/35m

/ /

9

Soft bus bar interval rods

MRJ-5/200 Set/ /

10

Equipment clamp

SSY-400/35B-200a*h=160*180

Set/ /

11

Equipment clamp

SSY-400/35B-200a*h=100*105

Set/ /

12

Equipment clamp

SY-400/35Ba*h=160*180 Set / /

13

Equipment clamp

SY-400/35Ba*h=63*105

Set/ /

14T

T type clamp

TY-400/35 Set/ /

15

Flat steel

-60*8 m

/

Hot zincgalvanized


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16

Embrace hoop belt

double bus bar and

gasket

D16 L~900

D16L-900 round

steel

Set

/Hot zincgalvanized

17

Equal angle iron

L50*6 m /

Hot zinc

galvanized

18

Flat steel

-5*80*200 Piece /

Hot zincgalvanized

19Bolts with double bus bar

and flat cushion

M16*60

Set/ /

20

Bolt with double bus bar

and flat cushion

M14*30

Set / /

21

Bolt with double bus bar

and flat cushion

M10*30 Set

/ /

1.2.2 Construction Timing

When the erection construction condition is applicable, start construction. Actually, the case

may be decided by civil and relevant aspects progress.

2. Compiling Basis

No.

Document Items

No.

Rem

arks

1

Electric Device Installation Project Quality Inspection andAssessment Code

DL/T5161.1-5161.17-2002 /

2HBEDI and Manufacturer Drawings

F1241S-D0201 /

3Bus bar Device Construction and Acceptance Specification of

Electric Device Installation Project

GBJ149-1990 /

4Electric Construction Organizing Designation

TDJ-11ZHA02a-001 /

5Electric Power Construction Safety Work Code (Thermal PowerPlant Part)

DL 5009.12002 /

6

Enforced Clauses of Engineering Construction Standards for Electric

Power Construction Part (Thermal Power Generating Project)

2006 /


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7Grounding Devices Construction and Acceptance Specification of

Electric Device Installation Project

GB50169-2006 /

8HSE Specifications

2008 /

9

()Electric Device Installation Project Construction and AcceptanceSpecifications-----HV Electric Appliance Construction andAcceptance Specification (and Clause Instruction)

GB50147-2010 /

10Overhead Transmitting Line and Lightning Lines Hydraulic

Construction Workmanship Codes

SDJ226-87 /

11230kV 230kv HV appliance (circuit breaker, disconnector, lightningarrestor) Construction and acceptance specifications

GBJ147-90 /

12

230KV

230kv Overhead Transmitting Line Construction and AcceptanceSpecification

GB502332005 /

3. Conditions and Preparation before Construction

3.1 Technical Preparation

3.1.1

All the designing institute drawings and manufacturer drawings have been achieved and the

drawings have been reviewed completely.

3.1.2

Certificate documents of construction personnel are complete.

3.1.3

The necessary tools and consumables are complete. The measuring instruments have passed the

verification and are compliance with standards.

3.1.4

The equipments have been delivered on site without any damage. Equipments and articles are free

from shortage.

3.1.5

The construction methodology has been approved and safety & technical clarification have been

approved.

3.1.6

The safety facilities are complete and the scaffolds have been approved by specified personnel. The


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hazards are clear and the relevant measures and possible. Specified person will undertake relevant

liability.

3.1.7

Before construction, organize construction personnel to study this methodology and make safety &

technical clarification.

3.2

Construction Personnel

3.2.1 Construction Personnel Arrangement and Qualification

No.

ConstructionPersonnel

Position

Quantity

Qualification

Liability

1Team leader

1

With construction organizingability, be acquainted withconstruction process, constructionquality and safety & environment

requirements. With IntermediateQualification or above.

1.

In charge of organizing constructionmanpower and materials. Strictly construct

as per methodology workmanshiprequirement, quality requirement andsafety & environment requirement toconstruction. totally in charge of quality

and safety work.

2.

Well arrange equipment installationquality self-checking and constructionprocedure handing over issue.

3.

During construction, if not clear about

drawings, do not construct. If materials arenot qualified, do not construct; if technical

& safety clarification have not been made,

do not construct; if last step process is notqualified, do not construct.

4.

Timely report quality and safety accidentsand organize construction personnel toanalysis carefully.

2Technologist

1

Be acquainted with the technical

management, equipmentinstallation experience; masterconstruction workmanship and

1.

Totally in charge of technical issue; takepart in relevant drawing review; handlingdesign variation, compiling construction


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quality requirements. The

qualification should be aboveassistant.

methodology, construction estimate,

technology, safety measures and holdtechnical clarification.

2.

Instruct site construction; timely find outand solve construction technical andquality hazards; instruction construction as

per methodology requirements.

3.

Coordinate with team leader to arrangeself-checking of construction acceptance.

4.

Submit and arrange constructionworkmanship card, and in charge of fillingand report acceptance records.

5.

Stop any violation operations and timelyreport to relevant senior departments.

3Hoisting man

2

With particular work experience;be acquainted with technologyand workmanship requirements;

well know construction quality,safety and environmentrequirements; with hoisting man

certificate.

In charge of site hoisting work.

4QC/QApersonnel

1

With quality work experience; beacquainted with Electric DeviceInstallation Quality Inspection

and Assessment Code. Beacquainted with constructiondrawing; passed training, with

QC/QA certificate.

1.

Be acquainted with relevant drawing

content and quality standards; take part indrawing review and technical clarification.

2.

In site, control construction schedule and

quality situation; carry out second stage

quality acceptance work as per qualitystandard; coordinate quality inspector to

complete third and fourth stage qualityacceptance.

3.

Propose negative proposals to the schemewhich will not satisfy construction quality;request relevant department to solve this

issue.

4. Arrange and summarize quality


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acceptance records.

5Safety personnel

1

,,

With site construction experience,be acquainted with ElectricPower Construction Safety Work

Code; with strong sense ofresponsibility; with safetypersonnel certificate.

1.

Totally in charge of construction safety ofinstallation work.

2.

Take part in methodology review workand safety clarification signing; carefullycheck methodology implementation

situation during work.

3.

In site, timely find out accident hazards

and supervise to take proof measures; beentitled to stop construction and timely

study how to handle the issue.

4. Arrange well accident survey, analysis and

handling work.

6Welder

1

Be acquainted with weldingprocess and relevantrequirements; with welder

certificate conforming towelding.

1.

In charge of equipment welding work.

2. In charge of quality self-checking workafter welding.

3.

As per construction workmanshiprequirements, quality requirement safety& environment requirements to construct.

7Installer

20

Be acquainted with technologyand workmanship requirements;

with construction ability; withintermediate or junior electriciancertificate.

1.

Strictly as per construction process

requirements, quality requirement, safetyand environment requirements to instructconstruction.

2Strictly apply construction workmanship card

and make detailed records.

3.

if quality or safety accident happens,

control accident site; timely informrelevant seniors to handle this issue.

4.

Be entitled to request technologist and

team leader for solution of confusions;totally be liability of construction quality;

be entitled to reject incorrect andambiguity instructions.

5.


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For special type of work, special

qualification must be available; withlicense for construction; construct as perspecification.

8 Electrician

1 With electrician certificate

In charge of site power charged operation andpower constructions.

Safety education must be passed for the aforementioned personnel. During construction, the

hoisting man, quality inspector, safety supervisor, electrician and welder must have license, and

accept the inspection by employer and supervisors.

3.3

Tools and Machinery

No.

Items

Specification and Model

Unit

Quantity

1 T

Nylon hoisting rope T

8

Piece4

2

Chain hoister

Within verification expiration date

Piece4

3 T

Jack (T)

10

Within verification expiration date(10)

Set2

4

Leveling instrument

Already verified

Set1

5

Leveling ruler


Piece2

6

Plumb

/

Piece2

7 Dust absorber


Set

1

8

Humidity absorber


Set1

9

Humidity meter

Already verified

Piece1

10

Impact drill


Piece1

11

Sand wheel cutting


Set1


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machine

12

Electric welding machine


Set1

13

Cutting device


Set 1

14

Spanner

/

Set1

15

Torque spanner

Already verified

Piece2

16

Electrician tools

Passed inspection

Set2

17 (3m)

Steel tape (3m)

50m

Piece3

18

Lorry

25t

Set1

19

Crane

25T

Set2

20

Milling machine

/

Set1

21

Bench drill

/

Set1

22Line pressing device

/Set

1

23Dust absorber

/

Set1

24Glare flashlight

/Piece

2

25Winding engine

/

Set

1

Maintain construction machinery and tools to guarantee good performance; arrange spare

articles work for easy-damaging materials; for machinery, tools, relevant load test, measure

certificate, using certificate, capacity certificate and other documents, report to supervisor for the

record.

3.4

Materials


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No. Items Model Unit Quantity

1

Industry alcohol without

water

/

Kg5

2

White cloth/

m5

3

Plastic membrane/

m50

3.5 Safety Facilities

Construction Safety Facilities Statement

No.

Items

Specification

Unit

Quantity

Remarks

1

Safety belt/

Piece28

Qualified in test

2

Safety rope/

Piece

3

Qualified in test

3

Tool bag/

Piece

4

No damage

4

Safety self-lockingdevice

/

Piece

10

Qualified in test

5

Safety helmet/

Piece

28 Qualified in test

6

Safety goggle/

Piece

5 Qualified

7

Safety fencing

As the case may be

Set3

Qualified

8

Safety alarm board/

Piece5

Qualified

9SF6 Anti-gas mask for

SF6

/

Piece3

Qualified

10

Welder mask/

Set2

Qualified

11

Anti-flame carpet/

Piece10

Qualified

12

Welder gloves/

Set20

Qualified

3.6 Process Handing Over

3.6.1


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The scaffolds have been erected and accepted, hanging up the sign board.

3.6.2 230kV

Supporting foundation elevation & centerline dimension, reserved holes, embedded parts,

dimension and position can satisfy 230kv equipment installation requirements.

3.7 Others

3.7.1

The construction site should be clear, no sundries and should be kept clean.

3.7.2

The construction road should be in good condition. It is not allowed to stake disorderly to block

transportation road.

3.7.3

Construction can satisfy construction requirement.

3.7.4

Strengthen protection for completed civil works.

4. Construction Program and Method

4.1 Construction Scheme

230kV

PT

In accordance with designing assembling drawing, mark the lines. After equipment OPI,

deliver to 230kv switch yard foundation platform by truck. As per serial number, fasten each bay

circuit breaker onto the assembling lines; then install tubular bus bar, maintenance platform, circuit

breaker conduit, PT & lightning arrestor, connect tubular bus bar and hardware fittings, cable laying

and wiring.

4.2 Construction Method and Requirements

4.2.1 Preparation before construction

4.2.1.1 230kV

All 230kv distribution devices foundation civil construction have been completed; embedded parts


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dimension and position conform to design requirements and have passed the acceptance.

4.2.1.2

The embedded grounding bolts have been erected and qualified.

4.2.1.3

230kV

In 230kv distribution device area, the road is clear and clean. The space is large enough and the area

is hard enough for crane and plate trailer for unloading and opening packages.

4.2.1.4

All manufacturer supping materials have been completely delivered on site (including equipments,

spare parts, specified tools).

4.2.1.4

Clean foundation surface before make the lineation. For each unit, measure foundation elevation ar

4 points.

4.2.1.6

Master relevant technical document, understand manufacturer product installation instruction and

product test certificate specifications and be clear about product character, constitution, working

principle, relevant installation method and requirements.

4.2.1.7

Formulate installation plan jointly with manufacturer and technical engineers, including equipment

transferring and OPI plan.

4.2.1.8

Implement proper training for installers, letting them know basic structure, performance character

of equipments to be installed; well master installation workmanship and improve sense of final

product protection.

1)

After distribution equipments having been delivered on site, timely apply for OPI and

installation. For situation which is not applicable for installation, the wind proof and rain proof

measures for sealing storage.

2)

It is better to open the packages at installation location, to avoid mechanical damage or paint


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falling during transferring.

3)

Measure whether the circuit breaker is affected with damp. If the equipments are with drying

agent, the test paper should be necessary to test drying agent humidity. If the test paper color is

blue, there is no need to carry out next test. If the color is pink, or the package is damaged and

the drying agent is affected with damp, it is necessary to carry out further test and treatment. If

package bag is damaged, it is necessary to replace or repair package and replace with new

drying agent.

4.2.1.9

()

()

It is not allowed to transfer equipments, by transportation machinery, without package, from storage

field to assembling site. For transferring safety, packages of different size cannot be stacked up

together (avoid damage top cap of the lower package). If the package must be stacked up, the wood

beams must be added between two packages to make the lower package bear the strength equally. It

is not allowed to stack up more than 3 packages. Keep balance of the sides. So, the packages should

be wrapped well to avoid turning over. Ensure, during delivering, the package will not move to any

direction. Pay attention to the information on nameplate (such as identifying, weight,. Etc) during

hoisting. During transportation and unloading, it is not allowed to turn upside down, collide, rolling

or fall down.

4.2.1.10

The OPI of equipment should conform to requirements below:

1)


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There should be no corrosion, damage or distortion for all elements, accessories, spare parts

and specified tools. The element wiring terminal, plugging members and current load parts

should be clean and no corrosion. The pressure data and water content amount of each air

isolating chamber should conform to product technical specification. The density relay and

pressure gauge should passed inspection. The fastening bolts should be complete and not

loosened.

2)

There should be no crack or damage on porcelain or insulator.

3) SF6

The equipments charged with SF6 should be properly sealed to satisfy the conditions below:

(N2+O2)Air (N2+O2) 0.05%

CF4

0.05%

Water

8ppm

HFAcid degree (as per HF)

0.3ppm

HFHydrolysis fluoride (as per HF)

1ppm

Mineral oil

10ppm

Purity

99.8%

Biotoxicity test

Non-poisonous

4)

Check product part from mechanical and electric aspects and implement necessary defect

treatment.

5)

The manufacturing and technical documents are complete (installation instruction, certificate,

test report, etc)

4.2.2

Pedestal Installation

4.2.2.1 ( 1)

Measure foundation levelness and make records (see figure 1).


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1 Figure 1 2 Figure 2

4.2.2.2

CB

DS 2mm 2

Draw equipment foundation centerline: by ink fountain, leveling instrument, theodolite and tape, as

per foundation drawing requirements, draw the centerlines of CB, DS and bus bar; the deviation

should be within 2mm (see figure 2).

4.2.3

Circuit Breaker Installation

4.2.3.1

Switch Pedestal and Supporting Installation

Fasten the support structure firmly.

2mm,5mm.

Three phase supporting elevation deviation should be 2mm; center distance deviation should be

5mm.

1 3 10mm

The quantity of support and foundation cushions should not exceed 3 pieces and the size

should not exceed 10mm; the cushions should be welded firmly.

2

Foundation structure and support should be fastened firmly.

3

Only the manufacturer supplied bolts can be used.

4.2.3.2

Pole Column Installation and Operation Mechanism Connection

1

Pole column transferring and dismantle

Lift three pole columns which already have been assembled, and lay down onto hard

ground through angle iron plate.


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Separate three pole columns by specified hoisting machine and lay down on hard ground.

2

Pole column air-tight test

SF6

O

Before install pole column onto pedestal, check SF6 pre-charging situation of each pole column:

remove the turning nut and O type sealing ring from transmission part flange; compress stop valve

in the flange by hand; if hissing voice appears caused by spraying gas, it is qualified; otherwise it

may be damaged during transportation.

4.2.3.3

Pole column installation

1)

Before raising pole column, in order to prevent damaging the pole column when it is inclined,

pad wood plate behind the pole column; then vertically, carefully and slowly hoist the pole

column by the hanger.

2)

To prevent pole column slipping during erecting, ensure the hoisting hook and pole column are

vertically arranged. Remove transferring support after the pole column is completely raised.

3)

Carefully insert pole column into pole column plate opening; reliably fasten the pole column

and switch pedestal with bolts and properly arrange relevant the torque.

4) 3mm,5mm

Pole column verticality deviation should be 3mm; three phase centerline distance deviation

should be 5mm.

4.2.3.4

Operation Mechanism and Pole column Connection

1)

Connect in accordance with manufacturer serial number.


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2)

From hydraulic mechanism, install connecting rod and driving rod; guarantee the length

will not be changed during connecting.

3)

The fork part has been verified and fastened by manufacturer; it is not allowed to change it

during installation.

3

Each connecting member should be reliable.

4.2.3.5

Switch Grounding

The bolts for switch pedestal should be connected reliably with main grounding net as per

specification requirements.

4.2.3.6

Conductor Connecting

1

Use steel wire brush to polish aluminum contact plate and paint one thin layer of conductive

paste.

2

The bolts should be fastened firmly and conform to torque requirements.

3

After conductor connecting, the terminal cannot bear extra-stress.

4.2.3.7

Circuit Breaker Checking, Adjusting and Commissioning

1SF6

Gas Charging of SF6

Switch gas charging should be implemented under manufacturers instruction.

SF6

Gas charging pressure should follow manufacturer requirements and SF6 pressure curve.


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One safety valve must be included for gas charging device to avoid that the pressure is over

high and damage insulator. During gas charging, closely pay attention to precise pressure

gauge.

Use regulating valve to control gas flow to avoid freezing circumstance on each

component.

After completing gas charging, remove gas charging joint, turn off gas charging valve and

tighten the nut. Pay attention to maintain cleanness.

2Sealing proper inspection

Each part should be sealed properly and there should be no leakage.

SF6 0.03MPa

If leakage appears, first turn the SF6 gas to 0.03MPa. carefully seek leakage position.

Loosen the leakage connection. check whether the sealing ring is damaged or there is some

sundries. Adopt the new pad ring to connect again and recheck the sealing proper.

3

Hydraulic system commissioning

4

Under rated operation condition, check hydraulic pressure, oil pressure and air pressure

operation test.

5

Anti-trip test

When circuit breaker locates at switch on or switch off position, the signals of switch on and

switch off will be transmitted to circuit breaker at the same time. The circuit breaker will not jump

and finally the circuit breaker will stop at switch off state.

6


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Miss operation test

When circuit breaker three phase separating switch positions are different, delay the three

phase separating switch and send signal.

7

Measure arc extinguish chamber loop resistance.

3.5mv.

Each arc extinguish chamber should be at switch on position; energize rated DC current; at

both ends of inline and outline wiring poles (excluding wiring plate), measure voltage which should

not exceed 3.5mv.

8)

Inspection before putting into running

Complete each item of commissioning and test, conforming to manufacturer and GB

requirements.

The circuit breaker driving test is correct and signal is correct.

The phase color sign is clear and the grounding is fine.

4.2.4

Disconnecting switch installation

4.2.4.1

Pedestal and grounding switch installation

1 M16*80

Fasten the pedestal, adopting M16*80 zinc galvanized bolts supplied by manufacturer; the

fastening should be reliable.

25mm

The distance between phases and deviation of phase distance should be 5mm.

32mm.

Height deviation should be 2mm.

4.2.4.2

Support porcelain insulator installation


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1

Before installation, carefully check porcelain insulator cleanness, there should be no crack,

damage and welding dirt. The porcelain insulator and metal flange should be connectedreliably.

2

Between porcelain insulators or between porcelain insulator and pedestal, the bolts connection

should be reliably.

32mm,2mm2mm.

The centerline deviation of the support should be 2mm; vertical deviation should be 2mm;

height deviation should be 2mm

4.2.4.3

Conductive disconnecting link installation

1

Conductive contacting surface should be clean and there should be no oxidation membrane;

neutral Vaseline should be painted.

2

Check the cleanness of current load part, no unevenness or corrosion circumstance. Connection

must be reliable and free from damage.

3

With bolts, connect driving pedestal on conductive disconnecting line blade and porcelain

flange. Install operation porcelain.

4

The operation porcelain insulator and main shaft should be in one line. No obstruction for

operation.

5

Reliably fasten fixed contact onto supporting porcelain insulator; the button contact can work

flexibly and there should no obstruction.

4.2.4.4

Operation box installation

From switch operation shaft center, hang a centerline to make operation mechanism main shaft

center coincide with vertical line.


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4.2.4.5

Connecting rod connection

1

Regulate coupler and arm joint adjusting extent to the middle position. In accordance with

actual dimension to decide the connecting rod length. At both ends, weld properly.

2

When the switch mechanism is under switch-off or switch-on position, install connecting rod

and lock the coupling apparatus.

4.2.4.6

Disconnecting switch regulation

1

Main switch blade adjusting

Relieve coupling plate of main switch blade before adjusting.

Adjust the terminal bolt of moving contact, making the moving contact point to static

contact center; insert along the slipping rod.

Adjust front conductive electric rod length. Properly adjust moving and static contact

distance.

Through regulating the length of connecting rod on driving pedestal, make the main blade

switch be neat after switch-on, without bending.

2

Grounding switch regulation

After switch on the grounding switch, the contact of static and moving should be reliable; after

switching off, it should stop at the horizontal position; the cutting bar should not be higher than

insulation flange.

When insert moving contact into static contact, the scale mark of button contact should be


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reached.

Regulate bracket board position. When switch on, the moving contact should stop at static

contact middle.

3

Terminal position adjusting of switch and operation mechanism

With stress to operate switching on and off. Through adjusting coupling, make operation

mechanism switching on and off coincide.

4

Switch three-phase linkage adjusting

Adjust bolts assembling of phase connecting rod to satisfy requirements.

The action between phases should be flexible, without obstruction.

20mm

Three phase non-synchronization value should be 20mm.

Only manual operation is no error, can implement electrical operation.

5

Mechanical interlock adjusting

1-2mm.

When the main blade switch is at switching off position and grounding switch is at switching

on position, the main disconnecting link interlocking board round arc shares the same circle

center with grounding blade connection board, and the distance between two edges should be

1-2mm.

1-2mm.

Separate grounding blade, relieve interlock connecting rod; switch on main blade switch;

through adjusting interlock connecting rod to make the grounding blade interlock board round

arc share the same circle center with main disconnecting line; the distance between two edges

should be 1-2mm.


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Welding properly the interlock board and pedestal round board.

During interlock adjusting, only after the manual operation is accepted, can implementelectrical operation.

6

Electrical limitation adjusting

Before adjusting, ensure the loop wiring is correct and without error.

When adjusting electrical limitation, consider, when power is interrupted for the motor, the

inertia factor.

7

Disconnecting switch test

It is better to implement test under electric operation switch on and off state.

All the test results and data should conform to GB and manufacturer specifications.

4.2.5

Mutual inductor Installation

1

Inspection before installation

The mutual inductor static test should conform to requirements.

The leading-out terminal should be connected properly; the insulation should be fine; the

standards should be clear.

No appearance damage for the boxes.

No porcelain falling off.


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No leakage on joint surface and welding seam.

Oil level should conform to qualified oil level line. Oil quality report from manufacturer

must be complete.

2

Mutual inductor installation and positioning

Firm connection of pedestal bolts; spring pad should be flatly compressed.

1.5/1000H

Vertical deviation 1.5/1000H

Three phases polarity direction should coincide.

Gas tightness of oil storage cabinet should be fine, no oil leakage.

The top cap of bolts should be connected well.

Protection gas should conform to designing requirements; the phase color should be

correct.

Equipment number should coincide with nameplate. Pedestal grounding cable installation

should conform to requirements. The grounding should be reliable.

PTX

The conductivity of stage divided insulation PT, X side should be fine and reliable.

CT

CT rear termination should have fine and reliable conductivity.

CT

CT spare secondary winding short circuited should be reliable and grounded.

Iron core grounding leading out wire conductivity should be fine and reliable.

Entity paint should be uniform and complete.


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4.2.6

Support insulator installation

1

Position support insulator. First regulate and measure embedded leveling and dimension. Then

install equipment C-channel.

2

Connect and fasten bolts.

3

Make grounding for bottom layer.

4.2.7

Lightning arrestor installation

4.2.7.1

Requirements and inspection before installation

1 ,

During packing, package opening, delivering, storing and installation of lightning

arrestor, it must be set vertically; it is not allowed to lay down, be inclined. Do not

compact or collide with other objects. Particularly, do not damage the plate at both

ends of body elements. If turn up side down or laid down, must carefully check.

Ensure internal mechanism is not damage, then it can be installed. If it is damaged, it

must the replaced.

2

High purity dry nitrogen gas is charged in lightning arrestor. So, without

manufacturers permit, do not randomly dismantle, otherwise it will be damaged.

4.2.7.2

Lightning arrestor installation and positioning

1

With bolts, fasten the lightning arrestor pedestal onto foundation.


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2 4

1.5%

When hoisting lightning arrestor, the hook should be set on 4 flanges installation holes. Install

the lightning arrestor on to pedestal. Ensure the verticality and distance between phases. Theinclined distance of lightning arrestor centerline top, relative to lead straight line, should not

exceed 1.5% of lightning arrestor total height.

3

Install discharge counter. During installation, the position should be correct. Three phase

coincide which is convenient for observing. (before install discharge counter, it must be

verified. After approved, it can be installed.)

4

Connect discharge counter and lightning arrestor connecting wire.

5

Install strapping ring. During installation, ensure that the porcelain gap should be uniform.

6

Install HV leading wires.

7

Fasten all connecting bolts. As per requirement, implement grounding for grounding

termination.

8

Phase color signs.


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4.3

Overhead and Other Equipment Installation

4.3.1

Installation flow figure:


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span measurement, material length calculation

setting out, install material

Erection

Crimping

Assembling

overhead line acceptance and handing over

construction technical document record arrangement

defects eliminating, site cleaning

sag adjusting, distance verification

Construction measures compiling, approve, and safety & technology

clarification

Installation material acceptance, construction field arrangement

Construction

techno

logy

records


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4.3.2

Material inspection and acceptance after arriving on site, and site preservation

1)

After conductor, insulator, clamp, hardware and other materials arriving in site, the package

should be good; the specification and model should conform to design requirement; accessory

and spare parts should all in readiness; the products technical documents should be all in

readiness.

3

The material stacking yard should be neat, no water accumulation and the rain proof measures

should be available.

2) 5%

2%

Check the conductor which should be without twisting, loosing situation, broken and other

defects; the cross section damage of conductive part should not exceed 5%; single stranded

conductor damage should not exceed 2%. The steel core should not be damaged.

3)

The insulator porcelain glaze surface should be smooth, no crack; the porcelain glaze should

not fall off. Steel cap and iron feet should not be damaged. Regarding the insulators which

have not passed high-voltage holding test, the manufacturer should be liable to replace.

4)

0.02mm

,,

The galvanized layer of clamps and hardware should be perfect, no distortion, no scare, no

blister, no corrosion or other defects. The surface should be smooth, no burrs and unevenness;

use 0.02mm precision vernier caliper to measure OD & ID of clamp connecting pipe. Use steel

blade ruler or depth ruler to measure other parts dimension whose deviation should conform to

relevant specifications. The tolerances of pipe ID &OD should coordinate well.

4.3.3


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Span distance measurement and material length caculation

1) L

U

Span distance measurement (L) should be carried out in sunny and non-wind days and record

the environment temperature. When measuring, measure the distance between hanging boards

of both sides or the distance between U ring inner openings, and make records.

2)

U

.

Measure the whole length () of insulator and hardware chain: assemble insulator and

hardware chain, hang it vertically. Measure the distance between U ring inner side and strainclamp steel anchor inner hole (namely the position where conductor steel core reach to). And

make records.

3)

Calculate conductor to be installed length by parabola, and make records.

L=L0+8f2/3L- L0 f

L=L0+8f2/3L- In the formula: L0conductor fabrication length

fdesigned sag.

4.3.4

Setting out and material fabrication

1)

Rubber plate, wood or other protection measures should be set in setting out yard. Forbid to

arrange setting out by dragging in order to prevent damaging the conductor.

2)

The conductor panel should be set neatly and firmly. The conductor panel laying direction

should make the conductor be extracted from up side.

3)

Fabricate a line measuring channel by wood or C-channel, setting rubber plate to prevent

damage conductor. Mark the size on line measuring channel, which will make it easy to control

conductor length.

4)


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When extract conductor from wire panel, relive the twisting force. When measure the

conductor, keep it straight to ensure the measuring precision.

5)

50mm

Mark the sign with paint pen or saw blade at the cutting position, after conductor measuring.

Use white cloth to mark the span and phase numbers. Fasten with iron wire at both sides where

are 50mm to the cutting position. After cutting with saw blade or particular tools, remove burrs

by file.

6)

SDJ226-87

Strip the external conductor when adopt train clamp. Under relevant specifications ofSDJ226-87 of Overhead line conductor hydraulic construction process code. Pay attention to

the several points below:

a

Regarding aluminum wire stripping length, please consider steel anchor and conductor

crimping extension amount.

b

When cut aluminum wire, do not damage steel core.

4.3.5

Crimping

1

GBJ149-90 2.5.4

There are two kinds of conductor crimping methods: detonation pressure method and hydraulic

pressure method. As per Clause 2.5.4, GBJ149-90, Electric Device Installation Project Bus bar

Device Construction and Acceptance Specification, adopt hydraulic method.

2SDJ226-87

Under SDJ226-87 of Overhead Transmitting Line and Lightning Line Hydraulic Process Code,

carry out conductor crimping.

3

0.866

Check hydraulic equipment which can work normally. The pressure scope should match with


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steel mould and clamp requirements. The inner mould of steel mould should be regular hexagon

which should conform to the OD of material going to be crimped. The opposite side and opposite

angle rate should be 0.866.

4

Use gasoline to eliminate strain clamp dirt. Remove the zinc scar and aluminum pipe rolling

edge and burrs. During washing, cotton is applicable, but cotton yarn cannot be used. Prevent

cotton wire left behind. After cleaning, timely arrange to prevent secondary oil pollution.

5

Regulate hydraulic tools pressure relieving valve. The crimping pressure should confo rm toclamp required pressure.

6

Before formal crimping, first implement trial crimping. Take the sample member to measure

the pipe, steel anchor or lining pipe original length. Crimp as per crimping sequence.

Separately calculate extension volume of each pressing member and make record.

7

Implement tension test for train clamp. As per the sequence (from light to heavy), string onto

the steel wire rope in front of crane; take turns to increase the weight, till the crimping pressure

satisfies manufacturer requirements. During trail lifting, observe carefully. It is acceptable that

the lifting object leaves the ground. Prevent clamp being broker to damage the lifting material.

8

Clean the conductor termination after stripping. The length to be cleaned should be 2 times of

clamp length. The steel core should be cleaned by gasoline, with broken lot.

9

Penetrate the strain clamp into aluminum pipe first, then penetrate into steel anchor. When

penetrate, following the stranding direction, push inside by turning. Before penetrating the


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steel anchor, first measure the inner hole length, making it totally pushed.

10

Before crimping, check the tool beforehand, set stably. adjust the crimping device angle. The

steel mould and the pressure should match with the clamp.

11

0.02mm

0.8660.993D+0.2mmD

1/2 1/3

Steel core crimping: directly crimp the pipe for steel core aluminum conductor. The crimping

direction is from steel anchor root to the terminal side. After finishing the second mould

crimping, use 0.02mm precision caliper to measure the opposite size of regular hexagon; the

biggest value allowed is 0.8660.993D+0.2mm (D is crimping pipe OD); if exceed the

value, replace steel mould to re-crimp. After steel anchor pressure crimping, paint

anti-corrosion if the zinc skin is damaged.

12

Aluminum pipe pressure crimping: remove the pressing part for the aluminum pipe; eliminate

the oxidation membrane, then paint electric forced compound grease. For steel core stranded wire,

as there is no aluminum lining tile, the gap between aluminum pipe and steel lining pipe is very big;

so directly crimping will make defect for aluminum pipe. It is applicable to wind aluminum wire

onto lining pipe. Pull the aluminum pipe back to pressure crimping position, turn clamp; after

verification, the angle of pliers should coincide with axial line; then carry out crimping.

12 5mm

60mm

For conductor strain pipe, when pressing to aluminum pipe opening, the 5mm scope which is


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the distance between the last mould and pipe opening should be non-pressing extent; the

pressing length from steel anchor groove opposite compressing should not be smaller than

60mm.

13

Equipment clamp pressure crimping: the construction sequence is: conductor terminal

remedying, cleaning crimping area, painting electric forced compound grease, penetrating pipe,

crimping adopting reverse pressing method by aligning drain plate; the mould overlap

quantity is the same with strain clamp.

14

2%

Inspection and treatment after pressure crimping: after pressure crimping strain clamp

aluminum pipe and steel anchor, use steel blade ruler to check bending degree which should

not exceed 2% of length; if exceeds, verify it. However, uplift and loosen strand are not

allowed to happen. Paint anti-corrosion or zinc paint on cutting position of strain clamp

exposed steel core.

4.3.6 Soft bus bar assembling

1

U

T

Divided conductor assembling: locally choose frame to set two hanging points; at one point,

set one fixed pulley to connect with winding engine steel wire rope. Both sides of conductor

separately connect hanging plate; then add one U type ring to connect with steel wire rope; lift

by winding engine; check and verify drain plate direction; as per designation, fix gap board. If

the conductor surface is not smooth or there is burr, use abrasive paper to polish; at last, install

T type clamp.

2

When assemble insulators, totally use the insulators which have passed high voltage holding


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test; clean the surface; the insulator appearance should be in good condition. Check spring pin

thickness, height and elasticity which should conform to requirements. Check the gap between

bowl, ball head and spring pine. Under the situation when the spring pine has been installed,

the ball head cannot run out of bowl.

3

The hardware connection and wire hanging bolts penetration direction should be uniform; the

specifications below should be followed:

a

All the suspension spring pins should penetrate to power receiving side. Bolts and cotter pins

which can penetrate along line should penetrate to force receiving side. For special situations,both side lines are from inner side to outside; the middle line is from left to right.

b

Penetrate all spring pins, bolts and cotter pins on strain insulator strings from up to bottom. For

special situations, it is from inner side to outside and from left to right.

c

Penetrate cotter pins and bolts on divided conductor from outside to inner side.

4

Site assembling: under hanging structure, assemble insulator string and hardware as per

conductor running direction and requirements. The adjustable hardware layout should conform

to designation, then connect with strain clamp or board.

5

After assembling and connecting, check hardware completeness. The hardware connecting

bolts, anti-loosening cap and split pins should be correctly used. The insulator bowl opening

should face upside; the spring clamp should all in readiness and without damage.

4.3.7

Erection

1)

Set alarming line at conductor erection area; non-specified personnel cannot enter inside.


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When erecting conductor, assign specified person to supervise safety; nobody is allowed to

pass or stay in the area.

2)

45

As the frame is designed without considering traction during conductor hanging, it is

necessary to adopt pulley for conductor hanging, and confirm temporary opposite direction pulling

line whose included angle to ground is less than 45.

2

When hang the conductor, adopt motor winding engine to tract and hang; or use crane to hang

one side, and use winding engine to tract the conductor.

3

The steel rope, winding engine, manual hoister and others used for conductor erection should

carefully inspected before putting into use. And after calculation, the strength can satisfy the

biggest load for conductor traction. After conductor terminal is lifted from ground, check the

hoisting situation. The grading ring should be installed as per drawing.

4

The bus bar with jumper wire and leading down wire connection can be lifted together with

bus bar; but the traction force should satisfy the requirements. After leading down wire

connection, carefully check bolt torque value as per specification requirements below:

Steel bolts fastening torque value

mm

Bolt model mm

M8 M10 M12 M14

Nm

Torque value Nm

8.8~10.8 17.7~22.6 31.4~39.2 51.0~60.8

mm

Bolt model mm

M16 M18 M20 M24

Nm

Torque value Nm

78.5~98.1 98.0~127.4 156.9~196.2 274.6~343.2

5


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Prepare two sets of angle grinders and motor hoister. fix the pulley from both sides of frame. If

the construction is smooth, it is acceptable to hoist the drain board together (prevent damaging

bus bar).

6

25-35

If electric equipment installation is very fast, it may first install support insulator and

disconnecting switch, then hoist tubular bus bar, which will make it not convenient for

construction. as the case may be, take protection measures and use 25-35T crane to coordinate

for installation.

7

After hoisting, adjust tubular bus bar levelness and straightness. Fasten connecting current

leading wire and shrinkable termination.

4.3.8

Paint phase color for bus bar

1

As per drawing, color phase sequence.2 A B C

Phase A: Yellow; Phase B: Green; Phase C: Red.

4.3.8

Soft bus bar sag regulation and distance verification

1 +5%~-2.5%

After conductor erection, measure the sag whose allowed deviation should be between+5%~-2.5%, and coincide with three phase bus bar.

2

Check the bus bar phase line distance to ground which should conform to designation and

specification requirements.

4.3.9

Grounding wire and short circuit fabrication installation

4.3.9.1


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The particular grounding wire for distribution device equipment proper should individually connect

to grounding net with multi-stranded bare copper conductor or copper bar, and the connection

should not be less than two points.

4.3.9.2

Use short circuit plate should be made by copper bar. Paint anti-corrosion paint at each connecting

position.

4.3.9.3 60*8 2

For the switch yard steel structure grounding, adopt 60*8 galvanized flat steel. The connection point

with equipment support should not be less than 2 points with main grounding net.

5 Quality Control Arrangement and

Quality Defect Precautions

5.1 Quality Goal

DL/T5161-2002

100% 100%

The project quality should conform to relevant clauses of design requirements,

manufacturer standard and DL/T5161-2002 Electric Device Installation Quality

Inspection and Assessment Code. The percentage of pass of section and branch section

should reach 100%; the good rate of unit project should reach 100%.

5.2

Quality Control and Quality Defect Precautions

No.

Quality defect

Precautions

1Non-tightness ofair chamber

Before connecting, carefully check sealing surface and rubber ring;

paste sealing glue; the angle setting should be uniform when fastenbolts.

2Air density is notqualified.

Strictly implement vacuum extraction; the vacuum degree should reachto requirements.

3

Non-qualificationof high voltagewithstanding

Before installation, carefully check equipment appearance: no

distortion or compressed situation; forbid to collide equipment; gas of


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gas chamber should conform to requirement; inspection should be

acceptable.

4The grounding is

not acceptable

As per equipment and designation, the connection should conform torequirements; connection with main grounding net should conform to

relevant requirements.

5

The conductorcutting position isrelaxed.

50mm

When cutting conductor, beforehand, use wire to fasten cutting side;tidy the conductor to make it not relaxed, no burrs and parallel with

wire strand axial wire.

6

Hardware modeland specificationare not acceptable.

When connect hardware with conductor, carefully check hardware holesize and conductor size to ensure the two coincide with each other.

7

Connectionbetween bus bar

and wiring terminal

Use bus bar and connection terminals in sets.

5.3 Control Points Arrangement during Construction

No.

Construction Control Point

Inspection Company

Witness

Group

Asia

Phil

QC/QA

CNEEC

SLPGC

/

1

Equipment foundation

measurement

* * * * * H

2

Equipment assembling of each

bay

* * * W

3

Circuit breaker installation of each

bay

* * * * * S

4

Vacuum tightness of each gas unit* * * * * R

5

SF6

Pressure of SF6 charging and

density

* * * * * W

6 Leakage test of each gas unit

* * * * * W


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should be qualified and the gas

inspection is qualified.

7Voltage withstanding should be

qualified.

* * * * * S

8

Bus bar arrangement of strainclamp to equipment is perfect.

* * * * * /

9No joint for bus bar arrangementwithin span.

* * * * * /

10Sag of three phase bus bar withinthe same span

* * * * * /

11Bus bar span deviation

* * * * * /

R W H S

(R: recorded point; W: witnessed Point; H: suspension and waiting for inspection point; S:

continuous monitoring)

5.4 Quality Standard and Requirements

Integrally implement, for this construction, national and industry technical specification and acceptance

standards, design requirements, manufacturer standards; also, satisfy requirements of contract, quality undertaking

and quality target.

No.

Items

Acceptance standards

1230kV 230kv outdoor distribution deviceinstallation

5161.2- 1.0.1Chart 5161.2-chart 101, HV electric device constructionquality inspection of Electric Device Installation Quality

Inspection and Assessment Code

2SF6circuit breaker installation

5161.2- 2.0.1Chart 5161.2-chart 2.0.1, HV electric deviceconstruction quality inspection of Electric Device

Installation Quality Inspection and Assessment Code

3

Disconnecting switch installation




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4

Lightning arrestor installation



5

Soft bus bar installation

5161.4- 7.0.2Chart 5161.4-chart 7.0.2, HV electric deviceconstruction quality inspection of Electric DeviceInstallation Quality Inspection and Assessment Code

6

HSE

6.1

Construction Hazards and Control

230kV

Construction Hazards and Precautions

Construction item: 230kv HV Distribution Device Installation

No.

Operation

Hazard Factor

Accident mayhappen

Precautions

Personnelin chargeHazards Description

1Welding

No

certificate orprecautions

Disqualified,

welder withoutcertificate

Quality accident

and humaninjure

Implement safety &technology clarification for

construction personnel;already achieved specialwork permit

2Cutting

Spark flying

Spark flyingduring cutting

Human injureand fire disaster

Wear protective goggle,etc; labor protection

appliance; set fire fightingblanket, etc, fire fightingmeasures.

3

Construct on

scaffold

Float board,empty board

In constructionlayer, the scaffold

is not tightened, orfully laid.

High

dropping

Set scaffold plates fully

and tighten them.


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4

Construct onscaffold

Highdropping

Suspended objectsare on scaffold

High dropping

Suspension objects are notallowed on scaffolds.

5Construct in

shell

Enclosed

space

Install equipmentin shell

Human

injure

Forbid to stand at corners;stay far away from

equipment travellingdirection;

6Climbing

ladder

Non-stable

ladder

The ladder is notstable; the

included angle toground is notreasonable; the

root and top are isfastened.

Ladder

slipping down

Fasten both sides of ladder

7

Machineryand tools

With defect

Crack or other

defect, brokerstrand for steelwire rope; hanger

with defect; thepulley has defect.On power leakage

protectionmeasures forelectric tools

Equipment andhuman injurecaused by tools

or equipment

Before using, carefullyinspect to ensure there isno error; the power leakageprotection action should be

correct.

8 Gas Cutter

Gas leakage

Flame caused bygas leakage

Fire disaster

Before using, carefully

inspect to ensure it isqualified.

9

Angle grinder

With defect

No reliablegrounding for

angle grinder; noprotection shield;

sand wheel withdefect

Equipment andhuman injure

caused by tools

or equipment

Periodically check; goodgrounding; wear goggles

and gloves; use qualifiedgrinding disc.


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10Hoister

Over-load

Over load

Hoister chainslipping,

damage orunforeseen

accident

Strictly operate as peroperation specification

11Steel wirerope

Steel wirerope friction,

without halfround pipeprotection

Friction happens

during mechanicalmoving

Broken strandcaused by steelwire rope

friction;unforeseenaccident

Forbid friction happens;

protect with half roundpipe; timely check.

12Hoistingoperation

Commandwithoutcertificate,no protection

measures

No alarm rope;wrong command;

no monitor inconstruction field

High dropping;crane inclining

Set alarm line inconstruction area; workwith certificate; with

monitor.

13Steel brush

Non-stableinstallation

No reliable

grounding; no

protection shield;sand wheel withdefect

Human injureby steel brushand equipment

damage

Before using, checkwhether the steel brush

installation is firm; goodgrounding; wear goggles

14

Overheadconductor,

jumper wire,down leadingwire erection

Highdropping,

collision

Equipment

accident; human

accident

Equipmentaccident; humanaccident

Fasten safety belt; must set

safety protection rope atproper positions; smalltools should be fastenedwith rope; with specified

tool bag to pass smalltools; forbid throw up anddown.

6.2 Safety Requirements and Precautions

6.2.1

Before construction, relevant personnel must accept safety clarification and sign on documents; be


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acquainted with construction methodology content and requirements; otherwise, it is not allowed to

work.

6.2.2

Correctly use, maintain and keep tools & machinery and protection appliance & tools; before using,

implement safety check.

6.2.3 ()

When work high above ground, must erect scaffold. (fixing measures for scaffolds must be

available) the scaffold boards should be set stable and fastened well; in construction area, erect

safety protection handrails which have passed inspection and hanged sign board.

6.2.4

,

Correctly fasten safety belt when work above ground. The safety belt should hung on the reliable

position above; set walk passageway on scaffold; for cross-work, unified coordination should be

applied; prevent high-dropping for which anti-dropping measures should be available.

6.2.5

With specified tool bag to pass small tools; forbid throw up and down.

6.2.6

Qualified power leakage protecting device should be set for electric tools; carefully check before

using for every time; no damage can happen to power line.

6.2.7

Wear protection mask when operate saw; the iron slag flying direction cannot face to human; forbid

to wear gloves when drill holes.

6.2.8

When use electric welding machine, the reliable grounding or zero sequence connecting should be

available. Adopt fire fighting measures; prevent fire fighting;

6.2.9

Prepare anti-slipping measures when use spanner or other manual tools; it is applicable to tie to

wrist.

6.2.10

Focus on operation; forbid to enter site after drinking.


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6.2.11

Comply with civilized construction; keep site clean.

6.2.12

Check hoisting tape and steel wire rope before hoisting; command with specified personnel of

hoisting, with certificate; all assistant personnel should follow instruction of the specified personnel;

set alarm line in operation scope, with specified personnel to monitor. Strictly forbid to stand or

cross within hoisting arm radius and objects going to be hoisted.

6.2.13 SF6

SF6

The safety cap and anti-shacking ring of SF6 gas bottle should all in readiness; tighten the safety cap;

anti-shine, anti-humidity and good ventilation storing field should be available; strictly forbid to

paste water and oil dirt on valve; do not store with other gas; prevent polluting the environment,

using gas recycling device for SF6 gas.

6.2.14

No smoking. No enter without authorize.

6.2.15

Clean construction field everyday; after work, relevant materials should be finished; remove

rubbish and wreckage to specified stacking position; equipments and materials should be arranged

by classification, which should not make trouble for construction.

6.2.16

Fire fighting devices should be adequate.

6.2.17

()

Forbid to use aluminum alloy ladders in switch yard. As the case may be, adopt induced electricity

proof measures (such as: insulation gloves, insulation shoes, electrostatic protection clothes, etc)

6.2.18()


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2

Wreckage are not recycled

centrally

Timely clean; without littering; centralized recycle to

the appointed place.

3

Heavy wind

6

Above 6 grade: forbid to hoisting;

4

Above 4 grade: defend construction area; take

anti-wind measures.

4

On rainy days

Erect defending shed; clean up water.

5

Wreckage stacked disorderly

Timely clean

6

Handrail and toeBoard are not set

On platform, passageway arequirements

1.05

Erect protection handrails and toe board

7

Randomly use welding machin

Before construction, apply permit; set fire proof blanother effective measures.

8

Dust enters bus bar

During disconnecting switch installation and bus barJointing, do not let dust enter bus bar; timely spray waterOn ground.

6.4 Fire Fighting Management

6.4.2

Tidy site materials; do not block fire fighting passageway; no flammable or explosive materials

around fire-works.

6.4.3 ()

Fire fighting facilities should be available and do not expired.

6.4.4 ( )


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If fire breaks out in site, at once, use fire extinguisher (dry power extinguisher); as the case may be,

timely inform security department; and timely report to department leader.

6.4.5

Apply flame operation permit before construction; take measures for fire proof; assign specified

person to monitor;

6.4.6

For the final product equipments needing to be covered, anti-fire tarpaulin must be used.

6.4.7

Check whether there is damage on appearance for electric devices; the insulation should conform to

requirements; grounding should be good; prevent fire accident.

6.4.8

Prevent oil leakage for transformer; prepare fire fighting facilities; construction personnel cannot

take fire to site.

6.5 Emergency Disposal

In order to guarantee the project to complete as plan, carry out Safety First, Prevention First

principle, achieve Care Live, Attention to Safety, specially compile emergency disposal.

6.5.1

After accident happens, relevant personnel should report to construction person in charge at once;

quickly take measures to rescue, decrease loss of life and personal injure and property; as soon as

possible to report project department;

6.5.2

Timely guard accident site and make records;

6.5.3

Fire disaster and explosion accident caused by flammable and explosive articles


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It is very dangerous for flammable and explosive materials once fire disaster or explosion

happens. If accident happens, at once take measures.1)

Once fire disaster happens, all people in site should try to take all kinds of measures to put out

fire. Remove flammable materials on ground; isolate fire area; protect human and fire fighting

equipments on windy days.

2)

After leaders receive fire alarming, immediately organize people to accident site:

a.

Secure site order;

b.

Investigate cause of fire;

c.

Introduce details to fire fighting command;

d.

Rescue materials having not been burn.

3)

Assigned specified person to revoke people from site; disperse people nearby.

4)

Coordinate with fire fighting authority to secure accident site, investigate accident cause.

5)

After fire disaster, report to senior department regarding actual loss;

6.5.4

High-altitude falling


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Immediately inform security department and site dispensary; send badly injured person to

hospital; safety supervision department should be in charge to investigate.6.4.5 electric shock proof emergency disposal

1

Immediately switch off power source. Rescue man should wear rubber shoes or stand on dry

wood board to try to take patient from power.

3

Timely check wounded person; as the case may be, implement CPR. Try to inform emergency

group and dispensary.

4

Timely organize site emergency group to rescue;

5

Medical personnel should timely make site treatment properly.

6

As per site requirement, mark alarm scope; assign emergency people to secure; disperse relevant

people in site;

6.5.6 Isolation (site protection)

Assign property security to guard; arrange red alarming lines; prevent other accident.

The emergency disposal should be well known to all construction personnel.


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7 Annex

7.1 Enforced Clause

The referred engineering construction enforced clause is below:

GB 50169 2006

GB 50169-2006, Grounding Device Construction and Acceptance Code of Electric Device

Installation Project.

3.1.1

All the Metal Parts below of Electric

Device Should Have Grounding or Neutral Connection.

1

Metal or steel concreted frame of indoor and outdoor devices, and metal fencing and metal

door near power.

2

Distribution, control and protective panel (cabinet, box) and operation station and other metal

frame and pedestal.

3.4.8

Grounding Cable and

Connection of Power Plant and Substation should be compliance with Requirements below:

1

For each grounding bus bar of equipment pedestal, grounding cables at both ends should

connect with power plant or substation grounding device. Grounding wire should connect with

switch yard O type grounding bus bar. If the grounding bus bar is very long, in the middle section,

add grounding wire and connect to grounding net.

2

Adopt bolt to connect grounding wire and equipment grounding bus bar.

3

When distribution device is arranged outdoor or erected indoor, directly contacting with

ground, it is better to adopt centralized grounding device at the joint position where grounding

switch, zinc lightning arrestor specified grounding terminal and distribution device grounding bus


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bar connect.

4

Arrange O grounding bus bar at switch yard; in the shortest route, connect all parts of indoorequipment needing to be grounded with O grounding bus bar.

3.3.12

For Power Plant and Substation Electric Devices parts Below, Arrange the Grounding

Cable Directly Connect With Grounding Bus bar:

1

GB501472010

Generator pedestal or shell, outline cabinet, neutral point cabinet metal pedestal and shell,

enclosed bus bar shell.

GB 50147-2010, Grounding Device Construction and Acceptance Code of Electric Device

Installation Project.

5.6.1

Implement below Inspections during Acceptance:

1

Circuit breaker, disconnecting switch, grounding switch and operation mechanism should be

normal, without obstruction; instruction of switch-on and switch-off should be correct; auxiliary

switch and electric locking action should be correct and reliable.

2

Density relay alarming and interlock values should conform to specification;

3

GB50150

SF6 gas leakage rate and water content amount should be compliance with GB Electric

Equipment Handing over Standards of Electric Device Installation Project, GB50150 and relevant

product technical documents.

5.2.7

Installation of distribution device equipment elements should follow product

technical document, under the instruction of manufacturer; conform to requirements below:

618%


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First discharge nitrogen before box pre-charging nitrogen; then charge dry air; in box, the O2

content in the air must reach to more than 18%.

230kV

GB5038-2006

GB5038-2006, 230kv Overhead Transmitting Line Construction and Acceptance Specification

1.0.3 230kV

Construct 230kv overhead transmitting line work under the approved design documents and

construction drawings which have been reviewed.

1.0.7

Instruments, devices and meters used for overhead line construction measurement must be

qualified and used within valid days.

7.1.1

Complete construction technology documents (including setting out, line tightening and

accessory installation, etc) must be available before construction.

7.3.1

It is not allowed to connect different metal, specification and different stranding direction

conductors or overhead lines in the same strain section.

7.3.2

When use hydraulic connection for conductor or overhead lines, the work must be shouldered

by technical workers who have passed training examination and with operation certificate. After

connection and self-check accepted, stamp the operators stamping.

7.3.3

3

195%

Use qualified electric hardware pipe and strain clamp for conductor or overhead grounding

wire. After connection, carry out tension test for test specimen before wire erection construction.

the test specimen should not be less than 3 groups (it is allowed to treat the pipe and strain clamp as

one group test specimen). The test force should not be less than 95% of conductor or overhead

grounding wire calculated tension force.

7.3.5


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Follow the specifications below to cut conductor and connect:

1

Forbid to damage the steel core when cut conductor aluminum strand.

7.3.6.

The appearance quality of continuous pipe and strain pipe, after compressing, should conform

to the specification below:

1

No crack is allowed to happen to continuous pipe after alignment; if not accepted, cut off and

reconnect.

230kv outdoor switch yard distribution devices

Documents