High Voltage Link Box for Earthing of High Voltage Cable System up to 245kVHVLB

About TE Connectivity

TE Connectivity is a global, $14 billion company that designs and manufactures approximately 500,000 products that connect and protect the flow of power and data inside the products that touch every aspect of our lives. Our nearly 100,000 employees partner with customers in virtually every industry – from consumer electronics, energy and healthcare, to automotive, aerospace and communication networks – enabling smarter, faster, better technologies to connect products to possibilities.

While TE has made every reasonable effort to ensure the accuracy of the information in this catalogue, TE does not guarantee that it is error-free, nor does TE make any other representation, warranty or guarantee that the information is accurate, correct, reliable or current. TE reserves the right to make any adjustments to the information contained herein at any time without notice. TE expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantability or fitness for a particular purpose. The dimensions in this catalog are for reference purposes only and are subject to change without notice. Specifications are subject to change without notice. Consult TE for the latest dimensions and design specifications. Raychem, TE (logo) and TE Connectivity are trademarks.

China：Tyco Electronics (Shanghai) Ltd.a TE Connectivity Ltd., Company5/F No.307 Qinjiang Rd, Shanghai, ChinaTel : +86-21-61067000

Fax: +86-21-54270322Zip Cd: 200233

http://energy.te.com

TE Energy - innovative and economical solutions for the electrical power industry: cable accessories, connectors & fittings, insulators & insulation, surge arresters, switching equipment, street lighting, power measurement and control.

© T

yco

Ele

ctro

nics

BLC

-00

19 R

ev. A

Application Popular cable sheath grounding options

Single core cables in operation carry alternating currents and induced voltage in the metallic sheath of the cable. These currents may cause, depending on different sheath bonding, circulating currents flowing in the cable sheath which reduce the transmission capacity of the cable and cause an additional heating. Link boxes are used for earthing and bonding cable sheaths of single core cables so that the induced voltages and circulating currents are eliminated or reduced.

On relatively short cable sections the cable sheaths are solidly bonded together and earthed at one position. There will be a voltage between sheath and ground that will be at its maximum at the farthest point from the ground bond. No current flows along the sheaths and no sheath circulation current loss occurs.

Single point earthing

The cable route is sectionalized into equal lengths. The sections are cross connected to neutralize the induced voltages. The phase sum of the introduced voltages will be zero and hence there will be no circulating currents when the cable laying is symmetrical.

Cross bonding

For cables laying in unsymmetrical formations the phase sum of the voltages is not zero despite cross bonding . Be ing t ransposed at each joint position and then cross connected, each cable occupies the same relative position in the cable formation. By this means the phase sum of the induced voltage is over three sections the same.

Cross bonding and transposition

1. Box lid

2. Sealing gasket (NBR)

3. Box

4. Cross linking bar

5. Cable entry

6. Sheath voltage limiter (SVL)

7. Clamping block

8. Insulative plate

** For link box of any other grounding options or specifications, including deviations from grounding cables, SVL, cable trench, etc, please contact the regional TE agency.

Features

Different designs available

Stainless steel box

Easy installation of non-compression connection

Installed on wall or buried underground

1-phase and 3-phase boxes available

With or without ZnO surge arresters (SVL)

With or without removable links

Test standard

For the three designs of link box, all are type tested in a third

party lab with test items listed following:

Sealing test: no leakage after 168 hours in 1-meter deep

water Insulation resistance ≥200M

Contact resistance ≤20μΩDC withstand voltage 20kV 1min

Impulse withstand voltage 40kV (10 neg. + 10 pos.)

direct earthing without SVL (single-phase)direct earthing with SVL (three-phase)

direct earthing without SVL (single-phase)cross bonding direct earthing without SVL (three-phase)

direct earthing without SVL (single-phase)cross bonding direct earthing without SVL (three-phase)

SVL parameters

Unit for 66~110kV cable system

for 220kV cable system

Rated voltage kV 2.8 4.0

Continuous operating voltage kV 2.24 3.2

Nominal discharge current kA 10 10

DC Reference voltage @1mA (U1mA) kV ≥4.0 ≥5.8

Leakage current @0.75U1mA

μA ≤30 ≤30

Residual voltage 8/20μs@ Nominal discharge current kV ≤7 ≤10

Long-duration current impulse 2000μs A 400 600

High current impulse 4/10μs kA 100 100

1

6

7

8

7

2

3

4

5

direct earthing without SVL direct earthing with SVL cross bonding

Application Popular cable sheath grounding options

Single core cables in operation carry alternating currents and induced voltage in the metallic sheath of the cable. These currents may cause, depending on different sheath bonding, circulating currents flowing in the cable sheath which reduce the transmission capacity of the cable and cause an additional heating. Link boxes are used for earthing and bonding cable sheaths of single core cables so that the induced voltages and circulating currents are eliminated or reduced.

On relatively short cable sections the cable sheaths are solidly bonded together and earthed at one position. There will be a voltage between sheath and ground that will be at its maximum at the farthest point from the ground bond. No current flows along the sheaths and no sheath circulation current loss occurs.

Single point earthing

The cable route is sectionalized into equal lengths. The sections are cross connected to neutralize the induced voltages. The phase sum of the introduced voltages will be zero and hence there will be no circulating currents when the cable laying is symmetrical.

Cross bonding

For cables laying in unsymmetrical formations the phase sum of the voltages is not zero despite cross bonding . Be ing t ransposed at each joint position and then cross connected, each cable occupies the same relative position in the cable formation. By this means the phase sum of the induced voltage is over three sections the same.

Cross bonding and transposition

1. Box lid

2. Sealing gasket (NBR)

3. Box

4. Cross linking bar

5. Cable entry

6. Sheath voltage limiter (SVL)

7. Clamping block

8. Insulative plate

** For link box of any other grounding options or specifications, including deviations from grounding cables, SVL, cable trench, etc, please contact the regional TE agency.

Features

Different designs available

Stainless steel box

Easy installation of non-compression connection

Installed on wall or buried underground

1-phase and 3-phase boxes available

With or without ZnO surge arresters (SVL)

With or without removable links

Test standard

For the three designs of link box, all are type tested in a third

party lab with test items listed following:

Sealing test: no leakage after 168 hours in 1-meter deep

water Insulation resistance ≥200M

Contact resistance ≤20μΩDC withstand voltage 20kV 1min

Impulse withstand voltage 40kV (10 neg. + 10 pos.)

direct earthing without SVL (single-phase)direct earthing with SVL (three-phase)

direct earthing without SVL (single-phase)cross bonding direct earthing without SVL (three-phase)

direct earthing without SVL (single-phase)cross bonding direct earthing without SVL (three-phase)

SVL parameters

Unit for 66~110kV cable system

for 220kV cable system

Rated voltage kV 2.8 4.0

Continuous operating voltage kV 2.24 3.2

Nominal discharge current kA 10 10

DC Reference voltage @1mA (U1mA) kV ≥4.0 ≥5.8

Leakage current @0.75U1mA

μA ≤30 ≤30

Residual voltage 8/20μs@ Nominal discharge current kV ≤7 ≤10

Long-duration current impulse 2000μs A 400 600

High current impulse 4/10μs kA 100 100

1

6

7

8

7

2

3

4

5

direct earthing without SVL direct earthing with SVL cross bonding

Application Popular cable sheath grounding options

Single core cables in operation carry alternating currents and induced voltage in the metallic sheath of the cable. These currents may cause, depending on different sheath bonding, circulating currents flowing in the cable sheath which reduce the transmission capacity of the cable and cause an additional heating. Link boxes are used for earthing and bonding cable sheaths of single core cables so that the induced voltages and circulating currents are eliminated or reduced.

On relatively short cable sections the cable sheaths are solidly bonded together and earthed at one position. There will be a voltage between sheath and ground that will be at its maximum at the farthest point from the ground bond. No current flows along the sheaths and no sheath circulation current loss occurs.

Single point earthing

The cable route is sectionalized into equal lengths. The sections are cross connected to neutralize the induced voltages. The phase sum of the introduced voltages will be zero and hence there will be no circulating currents when the cable laying is symmetrical.

Cross bonding

For cables laying in unsymmetrical formations the phase sum of the voltages is not zero despite cross bonding . Be ing t ransposed at each joint position and then cross connected, each cable occupies the same relative position in the cable formation. By this means the phase sum of the induced voltage is over three sections the same.

Cross bonding and transposition

1. Box lid

2. Sealing gasket (NBR)

3. Box

4. Cross linking bar

5. Cable entry

6. Sheath voltage limiter (SVL)

7. Clamping block

8. Insulative plate

** For link box of any other grounding options or specifications, including deviations from grounding cables, SVL, cable trench, etc, please contact the regional TE agency.

Features

Different designs available

Stainless steel box

Easy installation of non-compression connection

Installed on wall or buried underground

1-phase and 3-phase boxes available

With or without ZnO surge arresters (SVL)

With or without removable links

Test standard

For the three designs of link box, all are type tested in a third

party lab with test items listed following:

Sealing test: no leakage after 168 hours in 1-meter deep

water Insulation resistance ≥200M

Contact resistance ≤20μΩDC withstand voltage 20kV 1min

Impulse withstand voltage 40kV (10 neg. + 10 pos.)

direct earthing without SVL (single-phase)direct earthing with SVL (three-phase)

direct earthing without SVL (single-phase)cross bonding direct earthing without SVL (three-phase)

direct earthing without SVL (single-phase)cross bonding direct earthing without SVL (three-phase)

SVL parameters

Unit for 66~110kV cable system

for 220kV cable system

Rated voltage kV 2.8 4.0

Continuous operating voltage kV 2.24 3.2

Nominal discharge current kA 10 10

DC Reference voltage @1mA (U1mA) kV ≥4.0 ≥5.8

Leakage current @0.75U1mA

μA ≤30 ≤30

Residual voltage 8/20μs@ Nominal discharge current kV ≤7 ≤10

Long-duration current impulse 2000μs A 400 600

High current impulse 4/10μs kA 100 100

1

6

7

8

7

2

3

4

5

direct earthing without SVL direct earthing with SVL cross bonding

High Voltage Link Box for Earthing of High Voltage Cable System up to 245kVHVLB

About TE Connectivity

TE Connectivity is a global, $14 billion company that designs and manufactures approximately 500,000 products that connect and protect the flow of power and data inside the products that touch every aspect of our lives. Our nearly 100,000 employees partner with customers in virtually every industry – from consumer electronics, energy and healthcare, to automotive, aerospace and communication networks – enabling smarter, faster, better technologies to connect products to possibilities.

While TE has made every reasonable effort to ensure the accuracy of the information in this catalogue, TE does not guarantee that it is error-free, nor does TE make any other representation, warranty or guarantee that the information is accurate, correct, reliable or current. TE reserves the right to make any adjustments to the information contained herein at any time without notice. TE expressly disclaims all implied warranties regarding the information contained herein, including, but not limited to, any implied warranties of merchantability or fitness for a particular purpose. The dimensions in this catalog are for reference purposes only and are subject to change without notice. Specifications are subject to change without notice. Consult TE for the latest dimensions and design specifications. Raychem, TE (logo) and TE Connectivity are trademarks.

China：Tyco Electronics (Shanghai) Ltd.a TE Connectivity Ltd., Company5/F No.307 Qinjiang Rd, Shanghai, ChinaTel : +86-21-61067000

Fax: +86-21-54270322Zip Cd: 200233

http://energy.te.com

TE Energy - innovative and economical solutions for the electrical power industry: cable accessories, connectors & fittings, insulators & insulation, surge arresters, switching equipment, street lighting, power measurement and control.

© T

yco

Ele

ctro

nics

BLC

-00

19 R

ev. A