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IEEE
E Guid
de for Cab
ble Co
onnection
ns forr
IEEE Std
d 90003™-2
Gas--Insu
ulated
d2008
Sub
bstatiions
IEEE Std
d 90003™-2
2008
IEEE Power & Energy
y Societty
Sponsore
ed by the
Insulated
d Conductors Comm
mittee
IEEE
nue
3 Park Aven
New York, NY 10016-5
5997
USA
5 Jan 2012
IEE
EE Std 1300™-201
11
(Revision of
IEEE Std
d 1300-1996)
IEEE Std 1300™-2011
(Revision of
IEEE Std 1300-1996)
IEEE Guide for Cable Connections for
Gas-Insulated Substations
Sponsor
Insulated Conductors Committee
of the
IEEE Power & Energy Society
Approved 7 December 2011
IEEE-SA Standards Board
Abstract: This guide establishes typical dimensions for connections of a gas-insulated substation
(GIS) to extruded, self contained fluid-filled, and high pressure fluid-filled (pipe-type) cables in
single and three phase arrangements for voltages 72.5 kV to 550 kV.
Keywords: cable connections, gas-insulated substations, GIS, IEEE 1300, terminations
IEEE thanks the International Electrotechnical Commission (IEC) for permission to reproduce information
from its International Publication IEC 62271-209 ed.1.0 (2007). All such extracts are copyright of IEC,
Geneva, Switzerland. All rights reserved. Further information on the IEC is available from www.iec.ch.
IEC has no responsibility for the placement and context in which the extracts and contents are reproduced
by IEEE, nor is IEC in any way responsible for the other content or accuracy therein.
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Copyright © 2012 by the Institute of Electrical and Electronics Engineers, Inc.
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Introduction
This introduction is not part of IEEE Std 1300-2011, IEEE Guide for Cable Connections for Gas-Insulated Substations.
This guide serves to describe the coordination of design, material supply, installation, and test procedures
required for the connection of a cable to gas-insulated substation (GIS). This is a revision of the guide IEEE
Std 1300TM-1996 that was reaffirmed in 2002. This revision now includes dimensional requirements of drytype terminations for extruded cables as specified in IEC 62271-209 (2007-08). It also describes typical
dry-fit installation of pipe-type cable terminations into GIS and clarifies responsibilities in supply of the
support structures for both GIS enclosure and cable termination.
Notice to users
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iv
Copyright © 2012 IEEE. All rights reserved.
Interpretations
Current
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v
Copyright © 2012 IEEE. All rights reserved.
Participants
At the time this IEEE guide was completed, the Guide for Cable Connections for Gas-Insulated Substations
Working Group had the following membership:
Milan Uzelac, Chair
Frank Frentzas, Vice Chair
Pierre Argaut
David Campilii
Robert Gear, Jr.
Les Hinsman
Henk Geene
Grace Jang
Donald Johnsen
Albert Kong
Pierre Mirebeau
Ted Nishioka
Mohammad Pasha
Hon Suen
Raymond Whiteside
Shayne Wright
The following members of the individual balloting committee voted on this guide. Balloters may have
voted for approval, disapproval, or abstention.
William J. Ackerman
Roy Alexander
Arun Arora
Ali Al Awazi
Peter Balma
Earle Bascom III
George Becker
Steven Bezner
William Bloethe
Kenneth Bow
Kent Brown
Arvind K. Chaudhary
Robert Christman
Carlo Donati
Gary Donner
Gary Engmann
Markus Etter
Patrick Fitzgerald
Rostyslaw Fostiak
Frank Frentzas
David Giegel
David Gilmer
Edwin Goodwin
Todd Goyette
James Graham
Randall Groves
Steven Hensley
Lee Herron
Gary Heuston
Dennis Johnson
Andrew Jones
Hermann Koch
Joseph L. Koepfinger
Jim Kulchisky
Chung-Yiu Lam
Benjamin Lanz
Hua Liu
Albert Livshitz
Greg Luri
Michael Maytum
William McBride
William McDermid
Georges Montillet
Michael S. Newman
vi
Copyright © 2012 IEEE. All rights reserved.
Lorraine Padden
Bansi Patel
Robert Resuali
Michael Roberts
Bartien Sayogo
Devki Sharma
Gil Shultz
James Smith
Jerry Smith
David Solhtalab
John Spare
Nagu Srinivas
Gary Stoedter
Ryan Stone
James Timperley
Raul Velazquez
John Vergis
Jane Verner
Kenneth White
Raymond Whiteside
James Wikston
James Wilson
When the IEEE-SA Standards Board approved this guide on 07 December 2011, it had the following
membership:
Richard H. Hulett, Chair
John Kulick, Vice Chair
Robert M. Grow, Past President
Judith Gorman, Secretary
Masayuki Ariyoshi
William Bartley
Ted Burse
Clint Chaplin
Wael Diab
Jean-Philippe Faure
Alexander Gelman
Paul Houzé
Jim Hughes
Joseph L. Koepfinger*
David J. Law
Thomas Lee
Hung Ling
Oleg Logvinov
Ted Olsen
Gary Robinson
Jon Walter Rosdahl
Sam Sciacca
Mike Seavey
Curtis Siller
Phil Winston
Howard L. Wolfman
Don Wright
*Member Emeritus
Also included are the following nonvoting IEEE-SA Standards Board liaisons:
Satish Aggarwal, NRC Representative
Richard DeBlasio, DOE Representative
Michael Janezic, NIST Representative
Julie Alessi
IEEE Standards Program Manager, Document Development
Erin Spiewak
IEEE Standards Program Manager, Technical Program Development
vii
Copyright © 2012 IEEE. All rights reserved.
Contents
1. Overview .................................................................................................................................................... 1
1.1 Scope ................................................................................................................................................... 1
1.2 Purpose ................................................................................................................................................ 1
2. Normative references.................................................................................................................................. 2
3. Definitions .................................................................................................................................................. 2
4. Limits of supply.......................................................................................................................................... 4
4.1 General ................................................................................................................................................ 4
4.2 Over voltage protection ....................................................................................................................... 5
5. Typical dimensions..................................................................................................................................... 5
6. Ratings...................................................................................................................................................... 12
6.1 General .............................................................................................................................................. 12
6.2 Rated voltage ..................................................................................................................................... 12
6.3 Rated impulse withstand voltage ....................................................................................................... 12
6.4 Rated normal current and temperature rise........................................................................................ 12
6.5 Rated short circuit fault current and rated duration of short circuit ................................................... 13
6.6 Rated internal pressure of dielectric fluid for cable system............................................................... 13
7. GIS compartment gas pressure ................................................................................................................. 13
8. Dielectric-type test.................................................................................................................................... 13
8.1 General .............................................................................................................................................. 13
8.2 Cable termination dielectric-type test ................................................................................................ 14
8.3 Cable connection enclosure dielectric-type test................................................................................. 14
8.4 Isolating gap ...................................................................................................................................... 14
9. Mechanical force (short circuit and other)................................................................................................ 14
10. Cable connection support structures....................................................................................................... 15
11. Grounding............................................................................................................................................... 15
12. Installation .............................................................................................................................................. 18
13. Field tests................................................................................................................................................ 19
13.1 Dielectric field tests ......................................................................................................................... 19
13.2 Other field tests................................................................................................................................ 19
14. Operation and maintenance .................................................................................................................... 19
15. Special accessories ................................................................................................................................. 20
15.1 Vent and sample valve for fluid-filled cables .................................................................................. 20
15.2 Detection of cable fluid leaks inside cable termination enclosure ................................................... 20
15.3 Viewports ........................................................................................................................................ 20
15.4 Treating/sampling valve and maintenance opening......................................................................... 20
Annex A (informative) Bibliography ........................................................................................................... 21
viii
Copyright © 2012 IEEE. All rights reserved.
IEEE Guide for Cable Connections for
Gas-Insulated Substations
IMPORTANT NOTICE: This standard is not intended to ensure safety, security, health, or
environmental protection. Implementers of the standard are responsible for determining appropriate
safety, security, environmental, and health practices or regulatory requirements.
This IEEE document is made available for use subject to important notices and legal disclaimers.
These notices and disclaimers appear in all publications containing this document and may
be found under the heading “Important Notice” or “Important Notices and Disclaimers
Concerning IEEE Documents.” They can also be obtained on request from IEEE or viewed at
http://standards.ieee.org/IPR/disclaimers.html.
1. Overview
The end users of the switchgear and cable system will be able, by referencing this guide, to assure
interchangeability of the cable terminations and GIS housings in their systems. Manufacturers of both GIS
and cable terminations will have guidance in design, type test arrangement, installation, grounding
connections, and field tests of the components in their responsibility.
1.1 Scope
This guide establishes typical dimensions for connections of a gas insulated substation (GIS) to extruded,
self contained fluid-filled, and high pressure fluid-filled (pipe-type) cables in single and three phase
arrangements for voltages 72.5 kV and above.
The guide applies to both fluid filled and dry type cable terminations with insulating barrier separating SF6
gas in GIS housing from the termination fluid.
It also determines the arrangement for dielectric tests of the termination with simulated GIS enclosure.
Responsibilities in grounding connections, installation, and field tests are also defined.
1.2 Purpose
Connection of a GIS to cables typically requires the coordination of design, material, installation, and test
procedures of several parties. This guide provides detailed directions for such coordination.
1
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
The guide establishes limits of supply between cable termination and switchgear manufacturers and assures
interchangeability of the terminations and GIS enclosures.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must
be understood and used, so each referenced document is cited in text and its relationship to this document is
explained). For dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments or corrigenda) applies.
IEC 62271 “High-voltage switchgear and controlgear-Part 209: Cable connections for gas-insulated metalenclosed switchgear for rated voltages above 52 kV—Fluid-filled and extruded insulation cables—Fluidfilled and dry-type cable-terminations. 1
IEEE Std 48TM, IEEE Standard for Test Procedures and Requirements for Alternating-Current Cable
Terminations Used on Shielded Cables Having Laminated Insulation Rated 2.5 kV through 765 kV or
Extruded Insulation Rated 2.5 kV through 500 kV. 2,3
IEEE Std C37.100.1TM, IEEE Standard of Common Requirements for High-Voltage Power Switchgear
Rated Above 1000 V.
IEEE Std C37.122TM, IEEE Standard for High Voltage Gas-Insulated Substations Rated Above 52 kV.
IEEE Std C37.122.1TM, IEEE Guide for Gas-Insulated Substations.
IEEE Std 575TM, IEEE Guide for the Application of Sheath-Bonding Methods for Single-Conductor Cables
and the Calculation of Induced Voltages and Currents in Cable Sheaths.
3. Definitions
For the purposes of this document, the following terms and definitions apply. The IEEE Standards
Dictionary: Glossary of Terms & Definitions 4 should be referenced for terms not defined in this clause.
Figure 1 illustrates typical parts of a cable connection assembly for gas-insulated substations, some of
which are defined in this clause.
cable connection assembly: The combination of the cable termination, cable connection enclosure, GIS
conductor end, and/or removable conductor link that mechanically and electrically connect the cable to the
gas-insulated, metal enclosed switchgear.
cable connection enclosure: The part of the GIS that houses the cable termination and conductor current
connection interface. The “cable connection enclose” is interchangeably used with “GIS enclosure”
throughout the document.
1
IEC publications are available from the Sales Department of the International Electrotechnical Commission, 3 rue de Varembé, P.O.
Box 131, CH-1211, Geneva 20, Switzerland (http://www.iec.ch/). IEC publications are also available in the United States from the
Sales Department, American National Standards Institute, 25 West 43rd Street, 4th Floor, New York, NY 10036, USA
(http://www.ansi.org).
2
The IEEE standards or products referred to in this clause are trademarks of the Institute of Electrical and Electronics Engineers, Inc.
3
IEEE publications are available from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, Piscataway, NJ 08854,
USA (http://standards.ieee.org/).
4
IEEE Standards Dictionary: Glossary of Terms and Definitions is available at http://shop.ieee.org.
2
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
cable termination: Components (equipment) assembled onto the end of the cable to provide the electrical
and mechanical interface into the gas-insulated environment. Typically, this includes a solid insulation
barrier between the cable/cable fluid and the gas insulation of the GIS.
design pressure of the gas insulation in enclosure: The maximum gas pressure to which a gas-insulated
switchgear enclosure will be subjected under normal service conditions.
dry-type cable termination: A cable termination that comprises an elastomeric electrical stress control
component in intimate contact with a separating insulating barrier (insulator) between the cable insulation
and the gas insulation of the switchgear. The cable termination does not require any insulating fluid. The
dry-type cable termination may be of plug-in or not plug-in type.
fluid-filled cable termination: A cable termination that comprises of a separating insulating barrier
between the cable insulation and the gas insulation of switchgear. The cable termination includes an
insulating fluid as part of the cable connection assembly.
GIS conductor end: The end of the GIS high-voltage conductor inside the cable connection enclosure.
main-circuit connection interface: A part of the main circuit providing the current path between the GIS
conductor and the cable termination.
metal-oxide surge arrester (MOSA): A surge arrester utilizing valve elements fabricated from nonlinear
resistance metal-oxide materials.
pipe-type cable termination: A cable termination that comprises separating insulating barrier and other
termination components that are designed to withstand high fluid pressures of the pipe-type cable system.
removable link connector: A removable connector between the GIS conductor and the end of the cable
termination.
sheath voltage limiter (SVA): A device connected to a sheath or to the sheaths of specially bonded cables
intended to limit sheath voltages. The three main types are: gapless metal-oxide surge arrester, nonlinear
resistances in series with spark gaps, and spark gaps.
surge suppressor: A device operative in conformance with the rate of change of current, voltage, power,
etc., to prevent the rise of such quantity above a predetermined value. This device, commonly comprised of
one or more valve elements (non linear resistors) is commonly used for cable connection parts that are
separately grounded.
valve element: A resistor that, because of its nonlinear current-voltage characteristic, limits the voltage
across the arrester terminals during the flow of discharge current and contributes to the limitation of follow
current at normal power-frequency voltage.
3
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
To GIS
GIS end con necto r
(Main- cir cu it en d ter mi nal)
Re movable lin k conn ector
Mai n-circuit con nection interface
Termin ation end con necto r
Cable con necti on enclosur e
Gas
A ir
Insul ato r
Cab le te rmination
(sup plied a s a package )
Insula tor flang e or ada pte r
for extr uded cabl e o r pipe- stub
i nsulator for pipe -type cabl e
No n-lin ear resistor
(surge sup pressor),
if re quire d
So lid gro und
or
Cable ja cket fo r e xtrud ed cable
S hea th voltage li mi ter (S VL)
for spe cia lly bo nde d
e xtrud ed cable
or
Pola rization cell fo r
ca tho dic p rotectio n of
pip e-type ca ble
Cable she ath for extrude d ca ble or
metal riser pipe for pip e type cable
Cable in su lation
Cable con ducto r
Figure 1 —Typical components of a cable connection assembly
for gas-insulated substation
4. Limits of supply
4.1 General
The usual limits of supply for each party are shown in Figure 2 for one type of construction with fluid-filled
cable terminations frequently used for extruded dielectric cables, in Figure 4 for a type of construction with
dry-type cable terminations for extruded cables, and in Figure 6 for a type of construction used with pipetype cables. The limits of supply shown in Figure 2 and Figure 4 in this document are per IEC 62271-209
ed.1.0 (2007).
NOTE—The limits of supply for a type of construction with self-contained fluid-filled (SCFF) cables may be either per
Figure 2 (fluid-filled cable terminations on extruded cables) or per Figure 6 (pipe-type cables) and need to be agreed
5
upon between user and cable termination manufacturer.
5
Notes in text, tables, and figures of a standard are given for information only and do not contain requirements needed to implement
this standard.
4
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
4.2 Over voltage protection
If a metallic ground connection between part 6 or part 11 and part 13 of Figure 2 for fluid-filled cable
terminations and Figure 4 for dry-type cable terminations, and across part 16 in Figure 6 for pipe-type cable
terminations is not feasible, non-linear resistors (part 15 in Figure 2 and Figure 4 and part 19 in Figure 6)
may be connected across the insulated junction to limit the voltage under transient conditions. For further
details, refer to Clause 11.
5. Typical dimensions
Typical dimensions for cable connections are given in Figure 3 for a type of construction with fluid-filled
cable terminations frequently used with extruded dielectric cables, Figure 5 for a type of construction with
dry-type cable terminations for extruded cables, and in Figure 7 for a type of construction frequently used
with pipe-type cables. Typical dimensions shown in Figure 3 and Figure 5 are in millimeters. All
dimensions in Figure 3 and Figure 5 comply with corresponding figures in IEC 62271-209 ed.1.0 (2007).
NOTE—Typical dimensions for a type of construction with SCFF cables may be either per Figure 3 (fluid-filled cable
terminations on extruded cables) or per Figure 7 (pipe-type cables).
5
Copyright © 2012 IEEE. All rights reserved.
6
Copyright © 2012 IEEE. All rights reserved.
6
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
No.
Main circuit end terminal
Connection interface
Connection interface
Insulator
Cable connection enclosure
Enclosure flange or interface plate
Seal
Hardware
Insulator flange or adaptor
Intermediate gasket
Flange
Electrical stress control component
Cable gland
Gas
Non-linear resistors
Insulating fluid
Seal
Description
1
3
14
Copyright 2007 IEC, Geneva, Switzerland. www.iec.ch.
Figure 2 —Fluid-filled cable connection assembly – typical arrangement 6
X
X
X
X
X
X
X
X
X
X (if needed)
X (if needed)
X
X
X
X (if needed)
X
X
Manufacturer
Switchgear Cable termination
2
4
5
Limit of supply
8
16
9
15
11 (if needed)
Cable termination manufacturer limit of supply
10 (if needed)
This drawing is borrowed from IEC Publication 6 2271-2 09 ed.1.0
limit of supply
Switchgear manufacturer
7
6
17
13
12
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
Copyright © 2012 IEEE. All rights reserved.
7
0.5
See Footnote 6.
550
to
750
850
to
1050
123
to
170
245
to
300
112
110
110
100
100
300
300
d3
d4
d5
max. min. min.
+3.0
200
-0.0
+0.5
255
-0.0
d6
L2
+0.5
246
-0.0
+0.5
299
-0.0
d7
0.6 B
d3 d4
+0.3
245
-0.3
+0.3
298
-0.3
d8
139
202
200
140
480
L10
250
196
b)
350
300
Figure 3 —Fluid-filled cable connection assembly – assembly dimensions 7
21
21
18
18
+2.0
960
-2.0
+2.0
1400
-2.0
+1.0
583
-1.0
+1.0
757
-1.0
L7
6
6
5.5
5.5
110
110
85
85
30
30
30
30
70
70
50
50
105
105
55
55
m1
m2
d7
m2
0.5
d8
M12 M16
M12 M16
M10 M12
M10 M10
s1 s2
This drawing is borrowed from IEC Publication 62271-209 ed.1.0
100
100
50
50
L8
L6
d6
Number of
screws
n1
Sealing surface
R max 6.3
L6
L7
L8
L9
L10
max. min. max. max. min.
L5
L9
L9
d5
r1
r1
L5
0.2 B
d9
d10 L1
L 2 L3
L4
max.
min.
max. max.
Contact surface
d2
m1
L4
2.5 A
Cable connection enclosure
+5.0 +0.5 +0.3
559 440 620
560
480
-0.0 -0.3
-0.0
+5.0 +0.5 +0.3
1175
362
to
to
139 252 250 140 540 540
618
617 500 690
1550
550
-0.0
-0.0 -0.3
a) If d5 > d6.
b) d9 and corner radius shall not interfere with d6 and r2
100
100
325
to
450
72.5
to
100
112
d1
d2
max. min
BIL
[kVp]
Connection interface
Rated
Voltage
[kV]
90°
t1
d1
Connection interface
Main-circuit end terminal
(only an example)
r1
r1
Former dimension L1 was deleted
7
r2
Former dimension L 3 was deleted
one or two grooves for
single or double seal
20
16
12
8
n1
s4
B
d9
1x45°
Intermediate gasket
(if needed)
a)
10
a)
10
10
10
2.5
2.5
1.5
1
550
490
257
205
612
554
294
613
555
551
491
295 266
241 242 206
r1 r2
s1
s2
s3
s4
min. min. min. max. min. max.
A
s3
Sealing surface
R max 6.3
Insulator flange
or adaptor
+0.3
110
-0.3
+0.3
110
-0.3
+0.3
80
-0.3
+0.3
80
-0.3
t1
+0.5
582
-0.5
+0.5
640
-0.5
+0.5
270
-0.5
+0.5
320
-0.5
t2
t2
0.5
d10
Flange(if needed)
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
8
Description
Main circuit end terminal
Connection interface
Connection interface
Insulator
Cable connection enclosure
Enclosure flange or interface plate
Seal
Hardware
Insulator flange or adaptor
Intermediate gasket
Flange
Electrical stress control (elastomeric)
Cable gland
Gas
Non-linear resistors
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
Copyright © 2012 IEEE. All rights reserved.
8
See Footnote 6.
X
X
X
X
X
Switchgear
X
X
12
3
3
X (if needed)
X
X (if needed)
X (if needed)
X
X
X
X
Manufacturer
Cable termination
2
4
Figure 4 —Dry-type cable connection assembly – typical arrangement 8
5
6
Limit of supply
Switchgear manufacturer
6
7
7
8
8
9
10 (if needed)
13
11 (if needed)
9
11 (if needed)
12
15 (if needed)
for types A and B
Cable termination manufacturer limit of supply
This drawing is borrowed from IEC Publication 62271-209 ed.1.0
4
14
14
5
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
See Footnote 6.
Copyright © 2012 IEEE. All rights reserved.
9
Figure 5 —Dry-type connection assembly – assembly dimensions 9
325
to
450
550
to
750
850
to
1050
1175
to
1550
72.5
to
100
123
to
170
245
to
300
362
to
550
a) If d5 > d6.
BIL
[kVp]
Rated
Voltag e
[kV]
90
°
t1
d1
0.5
139
139
100
100
250
200
110
110
140
140
100
100
d4
min.
540
400
300
300
d5
min.
+3.0
200
-0.0
+0.5
255
-0.0
+5.0
385
-0.0
+5.0
540
-0.0
d6
+0.5
246
-0.0
+0.5
299
-0.0
+0.5
455
-0.0
+0.5
618
-0.0
d7
d8
c)
+0.3
245
-0.3
+0.3
298
-0.3
+0.3
454
-0.3
+0.3
617
-0.3
L2
m1
d2
d4
L4
500
375
250
196
b)
d9
max.
L1
100
100
50
50
L2
max.
L3
21
21
18
18
L4
min.
L5
L6
L8
r1
d6
r2
6
6
5.5
5.5
110
110
85
85
30
30
30
30
70
70
50
50
105
105
55
55
m2
M12 M16
M12 M12
M10 M12
M10 M10
m1
L7
20
16
12
8
n1
A
s3 s4
0.5
d7 d8
m2
s1 s2
This drawing is borro wed from I EC Publication 62271-209 ed.1.0
a)
10
10
10
10
r1
min.
d9
1x45°
2.5
2.5
1.5
1
550
390
258
205
c)
612
450
294
241
c)
613
451
295
242
551
391
266
206
r2
s1
s2
s3
s4
min. mi n. max. mi n. max.
B
Insul ator flange
or adaptor
Intermedi ate gasket
(if needed)
Sealing surface
R ma x 6.3
Number of scr ews
n1
L6
L7
L8
L9
L10
max. min. max. max. min.
L5
d5
+1.0
310
-1.0
+1.0
470
-1.0
+2.0
620
-2.0
+2.0
960
-2.0
0.2 B
r1
L9
r 1 L9
r1
Sealing sur face
R max 6.3
c) Val ues as indicated ar e tentative only. Small er dimensions ar e und er consi deration
c)
690
500
350
300
d1 0
max.
0.6 B
L10
2.5 A
Cable conne ction Enclosure
contact surface
d3
b) d9 and corner radius sh all not interfere wi th d6 and r 2
252
202
112
112
d1
d2
d3
max. min. max.
Connection i nter face
Main circuit end ter mi nal
(only an example)
Former dimensi on L1 was delete d
9
For mer di mension L3 was delete d
one or two grooves for
single or double seal
+0.3
80
-0.3
+0.3
80
-0.3
+0.3
110
-0.3
+0.3
110
-0.3
t1
t2
0.5
d10
c)
+0.5
270
-0.5
+0.5
320
-0.5
+0.5
475
-0.5
+0.5
640
-0.5
t2
Flange
(i f needed)
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
Copyright © 2012 IEEE. All rights reserved.
10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
No.
5 Gas
Description
8 G round shield
(I f ne eded)
6 Bleed/sa mpling
valve (if required)
x (if needed)
x
x (if ne eded)
x
x
Figure 6 —Pipe-type cable connection assembly – typical arrangement
x
x
x
x (if needed)
Provided by others
x
x
x
x
x (if needed)
x
x
x
x
x
x
10 Seal
Cable terminati on
Manufact urer
7 Insulat or
Swi tchgear
9 GIS enclosure f la nge
or int erface pla te
Removable link or GIS end con necto r
Termination end conn ector
Terminat io n corona shie ld
G IS en clo sure
Gas
Bleed/sampling va lve
Insulator
Ground shield
GIS enclosu re flange or interf ace plate
S eal
Hardware
Terminat io n body f la nge
Oil sensor
Insulating fluid
Electrical st re ss-con trol compone nt
Sheath sect io nalizing insula tor
Termination mounting plate
Stand-off insu lators wit h hardwa re
Non-lin ear resistors
Support st ru cture with hardware for en clo sure
Support structure for te rmin ation
4 G IS en clo sure with
optional opening f or
access to b le ed valve
3 Corona shield with
opt io nal open in g fo r
access t o ble ed valve
1 Removable link or
GIS end connector
2 Termination
end connector
2 1 Support stru cture
for termin ation
*) Limits of supply arrangement is typical only
20 Suppo rt structure with
hardware f or GIS enclosure
Switchgear manufacturer limits of sup ply *)
18 Stand -o ff
in sulators
with hard ware
17 Termina tion mou nting plate
19 No n linea r resistors
(if needed )
16 Sh eath
se ctionalizing
in sulator
Cable termination manufacturer limit s of su pply *)
1 5 Electrical stress
control componen t
14 Insu la ting f lu id
13 Oil se nsor (if needed)
12 Termin ation bod y flang e
11 Hardware
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
t1
m1
Copyright © 2012 IEEE. All rights reserved.
11
L1
Figure 7 —Pipe-type cable connections – dimensions
384
(15.13)
384
(15.13)
155.6
(6.13)
155.6
(6.13)
230
345
702
(27.63)
578
(22.75)
892
(35.13)
725
(28.53)
371.5
490
(14.63) (19.25)
720
(28.34)
480
(18.9)
420
(16.5)
b)
705
(27.75)
581
(22.88)
m2
-
480
(18.9)
-
c)
d6 min.
m m (in)
d6
375
(14.75)
d3
a)
1094
(43.06)
960
(37.8)
1092
(43)
1092
(43)
932
964
(36.68) (37.94)
L1
L2
mm (in) mm(in)
L3
t2
1/2"-13
1/2"-13
3/8"-16
m1
m2
5/8"-11
5/8"-11
b) If ground shiel d is us ed
50.8
(2.0)
50.8
(2.0)
38.1
(1.5)
L3
mm (in)
L2
24
24
16
n2
T ermination
mounting plate
92
(3.63)
92
(3.63)
49.2
(1.94)
t1
838
(33)
582
(22.91)
432
(17)
t2
Support s truc ture
for termination
c) If ground shield is not used
6
6
4
n1
Sheath
sectionalizing
insulator
1/2"-13
Termination
body flange
Opening for oil sensor
(if required)
Support structure with
hardware for GIS enc losure
(if neded)
n2 Number
of holes
d4
GIS enclosure flange
or interface plate
a) Ground shiel d is not required if GIS housing with the ID smaller than d3 is utilized.
238
(9.38)
90.5
(3.56)
72.5 - 145
d1
d2 max d3 max . d4 max d5 min
mm (in) mm (in) mm (in) mm (in) mm (in)
GIS Enclos ure
Termination
end connector
d5
System
voltage
[kV]
Bleed/Sampling
valve
d2
d1
n1 Number
of holes
Ground shield
(if provide d)
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
6. Ratings
6.1 General
The following should be specified and considered in design of the cable connection, and values should be
chosen from IEEE Std 48 with due consideration being given to gas-insulated switchgear (GIS) ratings
from IEEE Std C37.122.
a)
the rated voltage
b)
the number of phases in one enclosure
c)
the rated impulse withstand voltage
d)
the rated normal current and temperature rise
e)
the rated short-time and peak withstand currents
f)
the rated duration of the short circuit
g)
the rated internal pressure of dielectric fluid for cable system
Of the preceding list items, rated normal current, short-time current, peak short circuit current, and internal
dielectric fluid pressure for cable system are system dependent and should be referred to the cable
termination manufacturer.
6.2 Rated voltage
The rated voltage for the equipment (Ur) of the cable connection is equal to the lowest of the values for the
cable and the gas-insulated metal-enclosed switchgear and may be selected from the following standard
values:
72.5 kV – 100 kV – 123 kV – 145 kV – 170 kV – 245 kV – 300 kV – 362 kV – 420 kV – 550 kV
NOTE—This standard uses voltage ratings based on maximum design voltage of the termination instead of nominal
system voltage. For higher voltages, consult with the manufacturer.
6.3 Rated impulse withstand voltage
The rated impulse withstand voltage for the cable connection assembly shall be selected from the values
given in Table 1 of IEEE Std C37.122.
6.4 Rated normal current and temperature rise
The connection interface between the cable and the GIS-conductor should be designed, as a minimum, to
meet the cable current rating. There shall be no heat transfer from the GIS-conductor end to the cable. The
temperature rise of connection interface should not exceed values specified in Table 3 of IEEE Std
C37.100.1.
12
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
NOTE—As the maximum conductor temperature for cables is limited by the maximum operating temperature for the
cable insulation, there are certain cable dielectrics that cannot withstand the maximum temperature specified for gasinsulated metal-enclosed switchgear if there is heat transfer across the connection interface to the cable terminations.
Conductor contact interface surfaces, if aluminum, should be treated with a conductive plating or coating to
ensure long-term stability of current transfer. In all cases, care should be taken to ensure a reliable contact
and field measurement of resistance after assembly.
6.5 Rated short circuit fault current and rated duration of short circuit
Short circuit fault current as well as the duration of short circuit shall, as a minimum, match the levels of
the cable system.
6.6 Rated internal pressure of dielectric fluid for cable system
The nominal internal pressure of the cable insulating fluid for which the termination is designed to operate
when this pressure is greater than one atmosphere absolute under standard conditions, shall be as specified
by IEEE Std 48.
7. GIS compartment gas pressure
For cable connections where the gas is SF6, the design pressure should not exceed 0.85 MPa absolute,
(123.3 psia), 0.75 MPa relative (108.8 psig). Dielectric-type tests should be done at the minimum operating
pressure of the SF6 gas as specified by Table 1.
Table 1 —Gas-pressure limits for dielectric-type test of cable terminations
Range of rated voltages
Minimum SF6 gas pressure
Minimum SF6 gas pressure
U kV rms
(absolute) at 20 °C
(relative) at 20 °C
phase-to-phase
MPa (psia)
MPa (psig)
72.5
0.10 (14.5)
0 (0)
100–170
0.30 (43.5)
0.20 (29)
245–300
0.35 (50.8)
0.25 (36.3)
362–550
0.40 (58)
0.30 (43.5)
NOTE— For Table 1, the minimum gas pressures are intended as a test guideline for the manufacturer of the cable
termination. Higher values are permissible but should not exceed 0.85 MPa absolute pressure (123.3 psia). Alarm
settings shall meet the minimum requirements. If a gas other than SF6 is used, the minimum gas pressure should be
chosen to give the same dielectric strength.
8. Dielectric-type test
8.1 General
The dielectric-type tests of the cable termination fitted with a representative cable shall be performed in an
enclosure as per 8.2 and filled with insulating gas at the pressure not exceeding minimum gas pressure as
specified in Clause 7.
If a shield is an integral part of the cable termination design, it shall be mounted in its service position
during the test.
13
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
An additional test shield may be used to screen the exposed connection interface, if required by the cabletermination manufacturer, provided it does not overlap the connection interface by more than the distance
l2 specified in relevant Figure 3 and Figure 5.
8.2 Cable termination dielectric-type test
The cable termination should be able to pass a dielectric-type test to the levels of IEEE Std 48, with due
consideration being given to GIS ratings from IEEE Std C37.122. The tests may be done with simulated
enclosures consisting of metal cylinders as appropriate for the symmetrical single-phase test arrangement.
The single phase test arrangement using the single phase cable connection enclosure from the GIS covers
the test requirements of the cable termination in a three phase enclosure as it imposes the most severe
dielectric stress to the test object. It is, therefore, the referenced type test arrangement.
An additional test shield may be added to shield the end of the cable termination if it does not electrically
overlap the termination end in a way that would alter the electric field distribution of the cable termination
itself.
In general, the cable termination manufacturer is responsible for performing the type tests on new
termination designs. In case of older designs that have been proven in the field, the type tests, if required by
the customer, will be agreed among all parties involved.
8.3 Cable connection enclosure dielectric-type test
The cable connection enclosure may be dielectric-type tested without the cable termination using an
additional test shield on the GIS conductor end, but this shield should not alter the electric field distribution
that will exist on the GIS parts with the cable termination in place.
8.4 Isolating gap
An isolating gap is needed between the GIS conductor end and the cable termination end to allow separate
testing of the GIS and cable. This gap is usually provided by a removable conductor link and, if necessary,
shields on the ends of the GIS conductor and/or the cable termination end. No special dielectric type tests
are considered necessary for this condition since it is only present during field tests, and separate dielectrictype tests of the cable termination and cable termination enclosure demonstrate adequate withstands with
suitable shields.
9. Mechanical force (short circuit and other)
The manufacturer of the cable termination in a three-phase connection shall take into account the total
dynamic forces generated during short circuit conditions. These forces consist of those generated within the
cable termination and those coming from the main circuit of the switchgear. The maximum additional
transverse force transferred to the termination end connector shall not exceed 5 kN (1124 lbf). For singlephase cable connections, the transverse force applied to the cable termination end shall not exceed 2 kN
(450 lbf). It is the responsibility of the switchgear manufacturer to ensure that the specified forces are not
exceeded.
For both single-phase and three-phase connections, additional forces and movements from the switchgear
can be experienced due to temperature variations and vibrations in service. These forces can act on both
14
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
switchgear and cable termination and depend largely on the switchgear layout, termination installation,
cable design, and the methods of mechanical support.
The cable termination manufacturer shall be responsible for proper restraint of cable forces acting on the
cable terminations.
10. Cable connection support structures
The GIS manufacturer should be responsible for proper support of the cable connection enclosure and the
cable termination itself, taking into account the forces expected to be transferred from the cable to the cable
termination. Being part of GIS, the cable connection enclosure has to be supported independently of the
termination. In the case of pipe-type cable terminations, supports for the connection enclosure and the
mounting plate should be adjustable in all three axes. The cable termination manufacturer is responsible for
defining allowable forces and deflections allowed. Coordination between the GIS manufacturer, the cable
termination manufacturer, and the cable installer is required to assure that proper cable clamping and
support is provided, along with adequate separation and proper orientation between the two supports.
Caution should be exercised in design of support structure not to create magnetic loops, which could cause
heating of the support structure.
For both three-phase and single-phase connections, the design of any support structure shall take into
account forces due to temperature variations and vibrations in service. It is particularly important that the
support for the switchgear shall not be affixed to termination components (parts 9 and 11 of Figure 2 and
Figure 4 and part 12 of Figure 6).
11. Grounding
The cable connection enclosure should be electrically connected to the station ground. The cable
termination should include an electrically insulating shield sectionalizing insulator between the parts
electrically connected to the cable connection enclosure and the cable’s metallic ground shield and/or pipe
(for pipe-type cable terminations). The sheath sectionalizing insulator allows separate grounding and a
cable jacket integrity test in case of extruded cables and cathodic protection of the pipe-type cables. It also
facilitates limiting circulating currents in the cable’s metallic shield and/or pipe.
In some cases, the shield sectionalizing insulator may not be needed, or may be needed for test only, in
which case the cable termination manufacturer should supply the shorting provisions.
GIS switching transients with very fast rise times may cause short duration over voltages between cable
connection parts that are separately grounded. Adequate electrical insulation shall be provided between
such parts both internally and externally. Bypass surge suppressors may be required if a shield
sectionalizing insulator exists. The most commonly used bypass surge suppressor for this application is
nonlinear resistor; although, in some instances capacitors might be considered [B8] 10. Since the transients
have very short rise times (in the nanosecond range), the bypass surge suppressors need to be mounted very
close to the gap to be protected and connected by short, low-impedance leads. Some connections of bypass
surge suppressors are shown physically in Figure 8 and schematically in Figure 9. Shield sectionalizing
insulators are subjected to over voltages for several reasons as described in IEEE Std C37.122.1 and in
IEEE Std 575, and as in [B4], [B5], [B8], [B3], and [B13].
Depending on the layout of the grounding system of both cable and GIS, hazardous voltages might develop
in grounding connections during normal operation and/or during switching operation and system
disturbances.
10
The numbers in brackets correspond to those of the bibliography in Annex A.
15
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
NOTE—The number and characteristics of the non-linear resistors shall be determined and supplied by the cable
termination manufacturer taking into consideration the requirements of the user and the switchgear manufacturer.
Ty pical c on nection o f
extru d ed cab le in to GIS
Stati on ground
She ath sectionaliz i ng
insulator
Surge suppressor
(Nonl inear resistor)
Ty pical c on nection o f
pip e-typ e ca ble into G IS
Stat ion gr ound
Sheath
sectional izing
insulator
Surge suppressor
(Nonl inear resistor)
Stand-off
insulator
Pol arization cell of
ca thodic protection
Stati on ground
Figure 8 —Typical physical location of bypass surge suppressors
16
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
Cable termination in air
Cable connection for GIS
(or transformer)
Sheath sectionalizing
insulator
Surge suppresor (non
linear resistor)
Sheath voltage limiter
Ground (may include
cathodic protection)
Air termination on tower to GIS
Air termination next to tower to GIS
Air termination in substation to GIS
GIS to transformer
GIS to GIS
Figure 9 —Schematic examples of connections of bypass surge suppressor
and cable grounding
17
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
12. Installation
Coordination of the fit is required between the GIS parts and the termination parts. This shall include
review of the interfaces and the tolerances of each part and review of the cable installation procedure. This
coordination is especially critical in case of pipe-type cable or large size extruded cable that is difficult to
move during installation of cable accessory and if the cable is secured in its final position prior to
installation of the termination.
Unless otherwise specified, the GIS manufacturer and/or GIS installer is not responsible for installing the
cable termination on the cable. Normally, the GIS is installed and tested prior to the cable termination being
installed. In this case, the GIS manufacturer should supply a suitable permanent cap for the opening in the
cable connection enclosure that will later be used for the cable termination. This cap should allow complete
GIS testing. The cable connection enclosure may have to be removed to accommodate installation of the
cable termination.
The design of the GIS cable interface should ensure that there is sufficient room for the jointing crew to
work on the installation of the cable termination. If the GIS housing is close to the floor and the termination
base plate is below floor grade, the GIS manufacturer should ensure that the opening in the floor is such to
provide sufficient room for cable termination installation work.
In case of pipe-type cable terminations, the alignment of all termination and GIS components is critical. It
is therefore good practice to perform the “dry-fit” test with major components prior to start of the
termination installation. An example of the dry-fit set-up is shown in Figure 10.
GIS Bus
GIS cable
connection
enclosure
Support structure
for GIS enclosure
(adjustable in 3 axes)
Support structure
for GIS bus
GIS interface
plate
Termination body
Pipe-stub insulator
Subassembly of
termination base-plate
and pipe-stub
Termination mounting plate
Stand-off insulator
Support str ucture for
termination
(adjustable in 3 axes)
Collar
Riser pipe
Figure 10 —Typical dry-fit set-up for pipe-type cable terminations
18
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
In many cases, installation of cable connections for 230 kV and above and for large conductor size 138 kV
extruded cables should have similar attention as installation of the pipe-type cable connections. These
cables are difficult to move and have to be secured in their final position prior to installation of the
terminations. In this case, the GIS cable connection enclosure is installed last, and alignment of the
enclosure with the termination and the GIS bus is critical.
The layout of the GIS gear shall allow for the installation and removal of the GIS enclosure without
affecting the final position of the cable termination.
13. Field tests
13.1 Dielectric field tests
To allow separate testing of GIS and cable, the cable connection should include the following:
a)
Removable conductor link—removable connector between cable termination end and GIS
conductor end, of suitable length, and shielded so that voltage may be independently applied to
either the GIS or the cable. The end of the part not being tested should be grounded.
b)
Any special tools (e.g., shields, grounding connectors for use inside the cable termination
enclosure) needed for setting up a suitable condition for test shall be provided by the GIS
manufacturer.
c)
Test bushing—when the field test voltage is applied at the cable connection, the GIS manufacturer
shall supply a suitable test bushing or bushings. This may be the case when the GIS has no SF6-air
bushings and the cable is terminated at its other end in an enclosed manner.
d)
Detailed instructions for removal and replacement of the conductor link, including a checklist of
steps and detailed descriptions of any tools needed, shall be provided by the GIS manufacturer.
13.2 Other field tests
Other tests as appropriate for either the GIS or the cable may be performed.
Consult with the GIS and cable manufacturers prior to dc voltage testing.
14. Operation and maintenance
The practice of reclosing should be avoided when attempting to locate faults internal to the GIS, cable
connection enclosure, or cable. To facilitate fault location, current transformers may be required at the
cable connections.
The gas pressure (density) is monitored as a part of the GIS alarms and controls. The cable fluids (if any)
are monitored per cable and/or cable termination according to the manufacturer’s requirements.
Other devices (high-voltage lightning arrester, voltage transformer, ground switch, current transformers,
etc.) are sometimes installed in the same GIS enclosure as the cable termination. If any of these devices
need to be removed for access or test, the GIS manufacturer shall provide suitable secure covers for the
openings left by removal of the device.
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Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
15. Special accessories
15.1 Vent and sample valve for fluid-filled cables
The user may specify a vent and sample valve at the high voltage end of the cable termination.
15.2 Detection of cable fluid leaks inside cable termination enclosure
For high-pressure fluid-filled, pipe-type cables it may be appropriate to provide for an alarm if a significant
amount of cable fluid leaks into the cable termination enclosure. The fluid will collect at the bottom of the
cable termination enclosure where a sensor can detect the presence of the cable fluid.
15.3 Viewports
For especially critical applications or difficult working site conditions, a viewport on the cable termination
enclosure may be specified to allow visual inspection of the internal connection.
15.4 Treating/sampling valve and maintenance opening
For high-pressure fluid-filled and low-pressure fluid-filled cables, it might be appropriate to provide a valve
at the termination top. This valve can be used to bleed gasses that might accumulate in the termination in
case of loss of fluid pressure in the cable system. Also, the valve can be used for sampling the fluid for
diagnostic testing to determine the condition of the cable termination.
To access the treating/sampling valve at the cable termination top (if supplied), it might be appropriate to
provide maintenance opening(s) in the GIS termination enclosure.
20
Copyright © 2012 IEEE. All rights reserved.
IEEE Std 1300-2011
IEEE Guide for Cable Connections for Gas-Insulated Substations
Annex A
(informative)
Bibliography
Bibliographical references are resources that provide additional or helpful material but do not need to be
understood or used to implement this standard. Reference to these resources is made for informational use
only.
[B1] Arkell, C. A., Galloway, S. J., and Gregory, B., “Supertension Cable Terminations For Metalclad
SF6 Insulated Substations,” IEEE PES 1981 Transmission and Distribution Conference and Exposition,
Minneapolis, MN, Apr. 1, 1981, Paper no. 81 TD 689-9; Transactions on Power Apparatus and Systems,
vol. PAS-101, no. 5, pp. 1021-1029, May 1982.
[B2] CEA 072T223, “Development of improved sheath cross-bonding joint protectors for self-contained
underground cables,” Prepared by Ontario Hydro for Canadian Electrical Association, Principal
investigators: Erven, C. C., and Ringler, K. G., Dec. 1986.
[B3] CIGRE TB 035, “Monograph on GIS Very Fast Transients”.
[B4] CIGRE WG 21.07, “Design of Specially Bonded Cable Systems,” Part I, Electra, no. 28, pp. 55-81;
Part II, Electra, no. 47, pp. 61-86; Errata, Electra, no. 48, p. 73.
[B5] CIGRE WG 23.10, “Earthing of GIS—An Application Guide,” Electra, no. 151, pp. 31-51, Dec.
1993.
[B6] Electric Power Research Institute (EPRI), Underground Transmission Systems Reference Book,
2006 Edition, 1018480, Palo Alto, California, USA.
[B7] Fujimoto, N., “Practical Considerations in Protecting Gas-Insulated Substation to Cable Interfaces,”
CEA Spring Meeting, Mar. 1987, Vancouver, B. C.
[B8] Fujimoto, N., Croall, S. J., and Foty, S. M., “Techniques For the Protection of Gas-Insulated
Substation to Cable Interfaces,” IEEE PES Summer Meeting, San Francisco, 1987, Paper no. 87 SM 530-9,
Trans-PWRD, vol. 3, no. 4, pp. 1650-1655, Oct. 1988.
[B9] IEC 62271-203 (2003), Gas-Insulated Metal-Enclosed Switchgear for Rated Voltages Above 52
kV. 11
[B10] IEEE Standards Dictionary: Glossary of Terms and Definitions.
[B11] IEEE Std C62.22TM, Guide for the Application of Metal-Oxide Surge Arresters for AlternatingCurrent Systems. 12
[B12] Ishikawa, M., Oh-hashi, N., Ogawa, Y., Ikeda, M., Miyamoto, H., and Shinagawa, J., “An approach
to the suppression of sheath surge induced by switching surges in a GIS/power cable connection system,”
IEEE Transactions on Power Apparatus and Systems, vol. PAS-100, no. 2, pp. 528-538, Feb. 1981.
[B13] Parmigiani, B., et al., “Zinc oxide sheath voltage limiter for HV and EHV power cable: Field
experience and laboratory tests,” IEEE Transactions on Power Delivery, vol. 1, pp. 164-170, Jan. 1986.
11
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21
Copyright © 2012 IEEE. All rights reserved.