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Company name: henan pinggao electric co. LTD

Address: Henan province of pingdingshan city

south ring road 22

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550 kv composite bushing (Zhengzhou station of DC from south of Hami to Zhengzhou)

Description

The development of composite insulator industry

With the development of the ultra-high voltage AC and DC of power grid, the composite insulator, with its unique characteristic, is widely used in the power grid. Compared with the traditional porcelain insulator, composite insulator has the advantage of excellent seismic and wet dirt resistance, high strength, light weight, easy operation and maintenance, invulnerability to breakage and its umbrella skirt an d shed can be repaired. Especially in the field of ultra-high voltage, the cost performance of composite insulator is particularly prominent.

Since the beginning of 1998, Pinggao has been engaged in the development of composite insulator, now has the mature development technology of 12 kV ~ 1100 kV ac and dc hollow, pillar composite insulator and the whole series of ac and dc voltage grade line insulator products. The main products are hollow composite insulator, pillar composite insulator, composite insulator for arcing chamber, optical fiber composite insulator, composite sleeve, wall bushing, can meet the requirements of the AC/DC power station of each voltage grade. At present, more than 60000 composite insulator which were developed by Pinggao are operating safely in various area at home and abroad.

110kV~1100 kV hollow composite insulator

1. The structure of hollow composite insulator

Hollow composite insulator as a main component of composite bushing, play a role of the casing mechanical load, the electrical insulation.Hollow composite insulator is composed of silicon rubber umbrella cover, glass fiber winding tubes, end metal flange.

The structure of hollow composite insulator with the voltage grade of 550KV and above

2.Technical parameters of hollow composite insulator

Table1: technical parameters of hollow composite insulator of 126kV~1100kV

No.

Items

Unit

Technical parameters

126 kV

252 kV

363 kV

550kV

800kV

1100kV

1

Rated voltage

kV

126

252

363

550

800

1100

2

Separate bending load test 

kN

10

10

10

15

25

26

3

Destroy bending load test

kN

≥20

≥20

≥20

≥25

≥50

≥52

4

Separate internal pressure test 

MPa

2

2

2

1.6

1.6

1.6

5

Destroy internal pressure test

MPa

≥3.5

≥3.2

≥4.0

≥4.0

≥4.0

≥3.2

6

Pollution class

/

l parameters of hollow composite insulator of 126kV~1100kV

3.Application of hollow composite insulator

The hollow composite insulator produced by Pinggao is mainly used in tank circuit breaker, GIS, mutual inductor, air transformer, reactor, filter, lightning arrester, wall bushing, cable terminals and other kinds of electrical appliances.

4. The type testing and identification reports of hollow composite insulator

1)Type testig

The hollow composite insulator with more than 550KV voltage grade, developed by Pinggao independently, passed through all typing tests respectively in August 2006 and March 2008, and obtained the type test report.

The type test report of hollow composite insulator withthe voltage grade of 550KV and above

2)Product identification

The hollow composite insulator with the voltage grade of 550KV and more which is developed independently by Pinggao passed through the national identification in June 2009.

Appraisal certificate of hollow composite insulator with voltage grade of 550KV and above

Composite bushing of voltage grade with 420KV and above

1.Structure of composite bushing

The 420kv and the above voltage grade of composite bushing with SF6 gas as its insulating medium, composed of hollow composite insulator, conductive rod, shielding system, grading ring and other components. Including 800 kv and 1100 kv composite bushing is double block structure.

The structure of composite bushing with the voltage grade 420KV and the above

2. Technical parameters of composite bushing

Table 2: Technical parameters of 420kV~1100kV composite bushing

 

No.

Items

Unit

Technical parameters

126 kV

252 kV

363 kV

550kV

800kV

1100kV

1

Rated voltage

kV

126

252

363

550

800

1100

2

Separate bending load test 

kN

10

10

10

15

25

26

3

Destroy bending load test

kN

≥20

≥20

≥20

≥25

≥50

≥52

4

Separate internal pressure test 

MPa

2

2

2

1.6

1.6

1.6

5

Destroy internal pressure test

MPa

≥3.5

≥3.2

≥4.0

≥4.0

≥4.0

≥3.2

6

Pollution class

/

2.Technical parameters of hollow composite insulator

Table1: technical parameters of hollow composite insulator of 126kV~1100kV

3.Application of hollow composite insulator

The hollow composite insulator produced by Pinggao is mainly used in tank circuit breaker, GIS, mutual inductor, air transformer, reactor, filter, lightning arrester, wall bushing, cable terminals and other kinds of electrical appliances.

4. The type testing and identification reports of hollow composite insulator

1)Type testig

The hollow composite insulator with more than 550KV voltage grade, developed by Pinggao independently, passed through all typing tests respectively in August 2006 and March 2008, and obtained the type test report.

The type test report of hollow composite insulator withthe voltage grade of 550KV and above

2)Product identification

The hollow composite insulator with the voltage grade of 550KV and more which is developed independently by Pinggao passed through the national identification in June 2009.

Appraisal certificate of hollow composite insulator with voltage grade of 550KV and above

Composite bushing of voltage grade with 420KV and above

1.Structure of composite bushing

The 420kv and the above voltage grade of composite bushing with SF6 gas as its insulating medium, composed of hollow composite insulator, conductive rod, shielding system, grading ring and other components. Including 800 kv and 1100 kv composite bushing is double block structure.

The structure of composite bushing with the voltage grade 420KV and the above

2. Technical parameters of composite bushing

Table 2: Technical parameters of 420kV~1100kV composite bushing

 

No.

Items

 

Unit

420kV

550kV

800kV

1100kV

1

Rated voltage

kV

420

550

800

1100

2

Rated current

A

4000

5000

6300

6300

3

Rated short-time power frequency withstand voltage(1 min effective values)

kV

650

740

960(1094)

1100

4

Rated lightning impulse withstand voltage(1.2/50us peak)

kV

1425

1675

2100(2404)

2400

5

Rated operating impulse withstand voltage(full-wave 250/2500us)

kV

1050

1300

1550(1682)

1800

6

Creepage distance

mm

≥16500

≥20460

≥ 29760

≥37510

7

Cantilever load

N

10000

6000

10000

5000

8

SF6 gas pressure Rated/lowest/highest

MPa

0.5/0.4/0.5

0.5/0.4/0.6

 

0.45/0.4/0.6

9

SF6 yearly gas leakage rate

----

≤0.1%

≤0.1%

≤0.3%

≤0.3%

10

Pollution class

 

 

11

 

Magnitude of partial discharge

 

PC

1.5 times the phase voltages is not more than 10 PC.
1.2 times the phase voltages is not more than 3 PCS.

1.5 times the phase voltages is not more than 10 PC.
1.2 times the phase voltages is not more than 3 PCS.

1.5 times the phase voltages is not more than 10 PC.
1.2 times the phase voltages is not more than 5 PCS.

1.5 times the phase voltages is not more than 10 PC.
1.2 times the phase voltages is not more than 5 PCS.

 

3.The type testing and identification reports of composite bushing

1)Typing test

The type test report of composite bushing withthe voltage grade of 420KV and above

2)Identification report

550kV, 800kV and 1100kV composite bushing which is developed by Pinggao independently passed through the national identification in January 2014. Including 800 kv, 1100 kv composite bushing international leading technology level, 550 kv composite bushing international advanced technology level.

Identification report of composite bushing with the voltage grade of 420kV and the above

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