FJPE Shielding Corona Ring

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A corona ring, also called an anti-corona ring, is a toroid of conductive material, usually metal, which is attached to a terminal of high voltage equipment. The role of the corona ring is to distribute the electric field gradient and lower its maximum values below the corona threshold, preventing corona discharge. Corona rings are used on very high voltage power transmission insulators and switchgear, and on scientific research apparatus that generates high voltages.

Corona discharge is an ionization of air adjacent to high voltage conductors. It is sometimes visible as a dim blue glow in the air next to high voltage equipment. The high electric field ionizes the air, allowing current to leak from the conductor into the air. In electric power transmission lines and equipment, corona results in an economically significant waste of power. In devices such as electrostatic generators, marx generators, and television sets, the current load caused by corona leakage can reduce the voltage produced by the device, causing it to malfunction. Coronas also produce noxious and corrosive ozone gas, which can cause aging and embrittlement of nearby structures such as insulators, and create a health hazard for workers and local residents. For these reasons corona discharge is considered undesirable in most electrical equipment.

Type

Dimension (mm)

Weight (kg)

L

L1

D

S

H

Φ

hfd1 

FJPE-50/1800/300

1800

900

18

60

300

50

9.5

FJPE-50/1800/325

1800

900

18

60

325

50

9.5

FJPE-50/1800/350

1800

900

18

60

350

50

9.5

FJPE-50/1800/375

1800

900

18

60

375

50

9.5

FJPE-50/1900/300

1900

900

18

60

300

50

9.5

FJPE-50/1900/325

1900

900

18

60

325

50

9.5

FJPE-50/1900/350

1900

900

18

60

350

50

9.5

FJPE-50/1900/375

1900

900

18

60

375

50

9.5

 

Type

Dimension (mm)

Weight (kg)

L

L1

H

D

Φ

a

b

fhdf2 

JPL-500N

1450

900

330

50

18

60

60

9.3

FJP-500ND

1670

900

405

50

18

60

60

10.5

FJP-500N/GH

1450

920

330

60

18

60

60

11.3

FP-500N/GH

1450

900

330

60

18

60

60

10.7

Note:The main body is aluminum, and the rest are hot-dip galvanized steel parts.

 

Type

Dimension (mm)

Weight (kg)

L

L1

L2

H

D

Φ

C

a

hgfdh3 

PLJ-500K

700

600

250

235

50

18

20

60

3.9

PLJ-500X

700

600

270

235

50

18

20

60

4.4

PPLJ-500K

700

600

270

235

50

18

20

60

4.6

Note:The main body is aluminum, and the rest are hot-dip galvanized steel parts.

 

Type

Dimension (mm)

Weight (kg)

L

L1

H

D

M

C

a

hzxfdg4 

FJP-500XDA

800

700

320

50

16

20

80

6.2

JL-500XD

700

600

290

50

16

20

80

4.33

FJP-500XD1L

700

600

270

50

12

20

45

4.2

FJ-500XD/GH

700

600

290

60

12

20

80

9.85

Note:The main body is aluminum, and the rest are hot-dip galvanized steel parts.

 


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