terminations and joints for xlpe-insulated 12–36 kv … · optimisations have led to today's...

Cable Systems, Cables and Accessories

TERMINATIONS AND JOINTS FOR XLPE-INSULATED 12 – 36 kV MEDIUM VOLTAGE CABLES

ACCESSORIES

TesT values for TerminaTions 1)

Testing to DIN VDE 0278-629-1(Testing methods according to EN 61442)

Voltage range test values Test requirements

U0/UUm

6/1012

12/2024

18/3036

DC withstand voltage, dry kV 36 72 108 15 min at 6 U0, no breakdown or flashover

AC withstand voltage, dry kV 27 54 81 5 min at 4.5 U0, no breakdown or flashover

AC withstand voltage, wet 2) kV 24 48 72 1 min at 4 U0, no breakdown or flashover

Partial discharge at increased temperature kV 12 24 36 max. 10 pC at 1.73 U0

Impulse at increased temperature kV 75 125 17010 impulses at each polarity, no breakdown or flashover

Electrical heating cycles in air kV 15 30 45 126 cycles at 2.5 U0, no breakdown

Water bath testing 2) kV 12 24 36 10 cycles

Partial discharge at ambient and increased temperature

kV 12 24 36 max. 10 pC at 1.73 U0

Thermal short circuit (screen) according to EN 61442 section 10 2 short circuits at Isc, no breakdown

Thermal short circuit (conductor) according to EN 61442 section 112 short circuits to increase the conductor temperature to Θsc, no breakdown

Dynamic short circuit to be agreed upon 1 short circuit at Id, no breakdown

Impulse at ambient temperature kV 75 125 17010 impulses at each polarity, no breakdown or flashover

AC withstand voltage, dry kV 15 30 45 15 min at 2.5 U0, no breakdown or flashover

Salt spray 2) kV 7.5 15 22.5 Duration: 1000 h at 1.25 U0

Relative humidity 3) kV 7.5 15 22.5 Duration: 300 h at 1.25 U0

1) Excerpt of test values for standard voltage range2) Only applies to outdoor terminations

3) Only applies to indoor terminations

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CONTENT

The systematic approach to cable accessories

Südkabel can look back on more than 40 years of experience in the field of silicone rubber cable accessories for up to 550 kV. This experience is also a decisive factor in order to be able to guarantee high-quality terminations and joints for XLPE-insulated 12 – 36 kV medium voltage cables. With the early introduction of preassembled insulating bodies, Südkabel made sure that critical assembly steps such as the manufacturing of stress control or insulation elements were taken from the building site to the manufacturing plant.

The standard range of cable accessories for XLPE-insulated medium voltage cables includes plug-in terminations for metal-enclosed switchgears with inner or outer cone, joints with multi-range applications and transition joints is completed by multi-range terminations for indoor and outdoor applications as well as terminations for electrostatic precipitators. Our medium voltage accessories are also approved for networks or applications up to 42 kV under increased testing demands.

Test values for terminations 2

Welcome to Südkabel 3

Terminations 4 - 7

Indoor terminations 4

Outdoor terminations 5

Termination for electrostatic precipitators 111 kVs 6

Accessories for indoor and outdoor terminations 7

Joints and transition joints 8 - 10

Accessories for terminations, joints and transition joints 11

Our offer 12

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Indoor terminations with silicone rubber slip-on technology are set on cables with an insulation made of cross-linked polyethylene (XLPE). Various optimisations have led to today's common multi-range terminations for 12 and 24 kV. This type of termination covers up to five conductor cross sections with one insulating body and is compatible with press-fit and screw cable lugs. The applied insulating body material features relatively low shore hardness (A). This helps to achieve good adjustment to irregularities in the XLPE cable cores that potentially occur when stripping the welded exterior conductive layer. This makes post-processing of the stripped cores unnecessary.

The indoor terminations significantly exceed the requirements of DIN VDE 0278-629-1. A breakout is required for application with three-core cables. For cable mounting, special cable fixings are available.

INDOOR TERMINATIONS MULTI-RANGE TERMINATIONS 12 – 36 kV

1 Cable lug for conductor connection

2 Insulation tube

3 Insulator

4 Stress control element

5 Exterior conductive layer

6 Screening cable lug

7 Exterior screen

*) for cables according to DIN VDE 0276-620

Type Admissible core diametermm

Measure Hmm

Measure Dmm

Conductor cross section *)

mm²

SEHDI 10.2 13.3 – 20.8 205 46 35 – 95

SEI 12 16.8 – 24.3 205 50 70 – 150

SEI 12 21.5 – 32.6 205 54 185 – 300

SEHDI 10.2 26.5 – 40.9 205 46 300 – 630

SEI 24 16.8 – 24.3 205 50 25 – 70

SEI 24 21.5 – 32.6 205 54 95 – 240

SEHDI 20.2 30.0 – 45.0 215 69 300 – 630

SEHDI 30.1 22.9 – 27.8 270 77 35 – 50

SEHDI 30.1 25.1 – 30.5 270 77 70 – 95

SEHDI 30.1 28.3 – 34.4 270 77 120 – 150

SEHDI 30.1 31.5 – 38.3 270 83 185 – 240

SEHDI 30.1 35.6 – 43.3 270 83 300 – 400

SEHDI 30.1 42.2 – 50.1 270 88 500 – 630

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Outdoor terminations with silicone rubber slip-on technology are set on cables with an insulation made of cross-linked polyethylene (XLPE). Various optimisations have led to today's common multi-range terminations for 12 and 24 kV. This type of termination covers up to five conductor cross sections with one insulating body and are compatible with press-fit and screw cable lugs. The applied insulating body material features relatively low shore hardness (A). This helps to achieve good adjustment to irregularities at XLPE cable cores that potentially occur when stripping the welded exterior conductive layer. This makes post-processing of the stripped cores unnecessary.

The outdoor terminations significantly exceed the requirements of DIN VDE 0278-629-1. A breakout is required for application with three-core cables. For mounting at pole traverses or scaffolding, special mounting clamps are available.

OUTDOOR TERMINATIONS MULTI-RANGE TERMINATIONS 12 – 36 kV

1 Cable lug for conductor connection

2 Insulation tube

3 Insulator



6 Sealing kit

7 Ribbon clamp


9 Exterior screen

Type Admissible core diametermm

Measure Hmm

Measure Dmm

Conductor cross section *)

mm²

SEHDF 10.2 13.3 – 20.8 225 105 35 – 70

SEHDF 10.2 16.8 – 24.3 260 88 95 – 150

SEF 12 21.5 – 32.6 260 92 185 – 300

SEHDF 10.2 30.0 – 45.0 22 120 400 – 630

SEHDF 20.2 16.8 – 24.3 260 88 25 – 70

SEF 24 21.5 – 32.6 260 92 95 – 240

SEHDF 20.2 30.0 – 45.0 225 120 300 – 630

SEHDF 30.1 22.9 – 27.8 380 133 35 – 50

SEHDF 30.1 25.1 – 30.5 380 133 70 – 95

SEHDF 30.1 28.3 – 34.4 380 138 120 – 150

SEHDF 30.1 31.5 – 38.3 380 138 185 – 240

SEHDF 30.1 35.6 – 43.3 380 144 300 – 400

SEHDF 30.1 41.2 – 50.1 380 151 500 – 630

*) for cables according to DIN VDE 0276-620

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These terminations are especially designed for type A2XSY 1x50RM/16 111 kVs electrostatic precipitators and meet the special requirements of electrostatic filters.

TERMINATION FOR ELECTROSTATIC PRECIPITATORS 111 kVS

1 Conductor contact pin

2 Insulator



5 Sealing kit

6 Ribbon clamp


8 Exterior screen

Type Bore diameter of the insulating body

mm

Admissible core diameter

mm

Measure H

mm

Measure D

mm

Conductor cross section

mm²

SEHDL 23.5 25.5 – 30.0 425 170 50

SEHDL 31.3 33.5 – 38.5 425 170 50

Functionality

The components of electrostatic filters are subject to electrical impulse-shaped stresses. The voltage increases according to the charging proper-ties of a capacitor and abruptly drops after voltage flashover in the filter. Afterwards, the charging process is restarted.

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min 110

34 6012

120236

min 110

14130

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95-115

145

SEIK SET

SEW SEI

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ACCESSORIES FOR INDOOR AND OUTDOOR TERMINATIONS

Preassembled cable and high flexible cable links are XLPE cables or flexible EPR-insulated trailing cables which are equipped with terminations in the factory. They are primarily used for connections between transformers and switchgear or for special applications like electrically-powered trains.

Preassembled cable and high flexiblecable links 12 – 36 kV

• Theminimumbendingradiustypicalforflexibletrailingcablesisidealfor installation in narrow areas.

• Rationalizationofsubstationassemblythankstonoterminationinstallation being carried out at the installation site.

• Theaccessoryequipmentofthelinkscanbechosenfreelyforanycombination of terminations and plug-type connectors admissible for that particular type of cable or trailing cable.

• Outputcheckcanbeagreedupon.

*) Air installation at an ambient temperature of 30 °C

Type Admissible current load *)

A

Short circuit current

1 s

Outer diameter

mm

Minimum bending radiusmm

Trailing cable 24 kV

NTMCWOEU 35 mm² 240 5 29.5 145

NTMCWOEU 50 mm² 300 7.2 31.5 155

Cable 24 kV

N2XSY 35 mm² 235 5 30 450

N2XSY 50 mm² 282 7.2 34 550

Fixing clamps for outdoor terminations

Outdoor terminations can withstand transverse forces only to a limited extend. Potentially occurring mechanical loads after short-circuits and cable oscillations or due to the inherent rigidity of the cable can be controlled by means of suitable fixing clamps. BSW fixing clamps that areespeciallydesignedforSEHDFoutdoorterminations(forhorizontalmounting) and BSS fixing clamps (for vertical mounting) are made of glass fibre reinforced UV-resistant polyamide. They are characterised by a large clamping length of 100 mm for ideal mounting while observing the admissible surface pressure of the cable. Adjustment to individual external cable diameters is enabled by different reducers.

Fixing clamps can be used for all common dimensions on panels in 5 mm increments. Various reducers enable adjustment of individual external cable diameters.

1 BSW fixing clamp

2 Reduction insert

3 BSS fixing clamp

D 30 – 50 mm

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The SEV joint with slip-on technology serves as the connection between two plastic-insulated cables with 12, 24 or 36 kV.

JOINTS AND TRANSITION JOINTSJOINTS 12 – 36 kV

The multi-range capability enables use of up to five cross sections with oneinsulatingbodysize.Thesingle-part,triple-extrudedinsulatingbodyis made of silicone rubber and consists of a refractive stress control ele-ment, silicone insulation and an external conductive layer. The conductor connection can either be realised with screw or press-fit connectors. Con-nectionswithinonejointsizecanberealisedwithoutanyproblems.Themetal screen of the joint consists of one winding of braided copper tape. The external mechanical protection is usually provided by a heat shrink-able tube. Optionally, corrosion protection tape can be used.

SEV multi-range joints meet the requirements of DIN VDE 0278-629-1.Type Voltage

Umax kV

Conductor cross sectionmm²

Admissible core diameter

mm

SEV 12 12 50 – 95 15.5 – 20.8

SEV 12 12 120 – 240 18.9 – 28.4

SEV 12 12 300 – 500 27.4 – 36.4

SEV 24 24 50 – 150 18.9 – 28.0

SEV 24 24 95 – 240 22.8 – 32.6

SEV 24 24 240 – 400 29.5 – 39.6

SEV 24 24 300 – 500 30.9 – 40.9

SEV 24 24 630 39.1 – 50.1

SEV 24 24 800 – 1000 44.6 – 57.8

SEV 36 36 50 – 120 23.5 – 32.5

SEV 36 36 150 – 300 29.5 – 39.6

SEV 36 36 800 – 1000 44.6 – 57.8

1 Insulating body

2 Stress controlling layer

3 Conductive outer coating

4 Press-fit connector

5 Shrinkable tube

6 XLPE cable core

7 Copper braided tape

8 Screen wires

9 Sealing wrap

10 XLPE cable

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SEVü transition joints with slip-on technology are used to connect paper-insulated cables with plastic-insulated cables.

JOINTS AND TRANSITION JOINTSTRANSITION JOINTS 24 kV

1 Insulating body

2 Stress controlling layer

3 Conductive outer coating

4 Press-fit connector

5 Stress control tape

6 Silicone tape

7 Copper braid

8 Roller spring

9 Shrinkable tube

10 Paper-insulated cable

11 XLPE-cable

SEVü can be compared to SEV and offers the same features (multi-range capability, application of press-fit and screw connectors). Additional mounting steps are only required on the paper-insulated cable side. The paper-insulated cable side is prepared with tape to ensure that the impregnating compound of the paper-insulated cable cannot come into contact with the insulating body. This technology is referred to a “dry” transition joint.In connection with XLPE cables with paper-insulated single-core cables, the external mechanical protection is provided by a shrinkable tube. SEVü.When used on paper-insulated three-core cables, these cables are first of all divided up into its individual cores with a cable breakout and then treated as single-core cables. AM/SEVü.

SEVü transition joints meet the requirements of DIN VDE 0278-629-2.

Type Voltage

kV

For connection of single-core XLPE cablesand paper-insulated ...

Conductor cross section Admissible core diameter

mmPaper-insulated cable

mm²XLPE cable

mm²

SEVü 24 24 ... Single-core cables 35 – 150 50 – 150 18.9 – 22.0

AM/SEVü-B24 24 ... SL-type cables 35 – 240 95 – 240 22.8 – 32.6

185 – 300 300 30.9 – 40.9

AM/SEVü-H24 24 ... H-type cables 35 – 150 50 – 150 17.5 – 25.0

35 – 240 95 – 240

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The single-part insulating body is made of silicone rubber and includes the stress control elements as well as an earthing reservoir for earthing the paper-insulated cable near the joint. This technology is referred to as a “wet” transition joint. Factory-equipped additional elements like insulating bodies, sealing parts and joint pipes enable easy and very quick mounting without soldering.In connection with XLPE cables with paper-insulated single-core cables, the external mechanical protection is provided by a shrinkable tube. SEHDVü.When used on paper-insulated three-core cables, these cables are first of all divided up into their individual cores with a cable breakout and then treated as single-core cables. AM/SEHDVü.

SEHDVü 20 transition joints meet the requirements of DIN VDE 0278-629-2.

JOINTS AND TRANSITION JOINTSTRANSITION JOINTS 24 kV

1 XLPE cable

2 H-type or SL-type cable

3 Shrinkable cable breakout

Type Conductor cross section Lengthmeasure Lapprox. in

mmXLPE cable

mm²Earthing cable

mm²

SEHDVü 20 95 35 – 95 1000

SEDVü 20 120 50 – 120 1000

SEHDVü 20 150 70 – 150 1000

SEHDVü 20 185 95 – 185 1000

SEHDVü 20 240 120 – 240 1000

AM/SEHDVü 20 95 35 – 95 1400

AM/SEHDVü 20 120 50 – 120 1400

AM/SEHDVü 20 150 70 – 150 1400

AM/SEHDVü 20 185 95 – 185 1400

AM/SEHDVü 20 240 120 – 240 1400

SEHDVü transition joints with slip-on technology are used to connect paper-insulated cables with plastic-insulated cables.

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L2

L2

L1

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L1

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Type K26/38 K36/52 K50/75 K66/90 KP29/41 KP39/53 KS26/36 KS33/46

Suitable for the following cable diametes in mm

26 – 38 36 – 52 50 – 75 66 – 90 29 – 41 39 – 53 25 – 36 33 – 46

Measure L1 90 105 126 158 172 190 150 170

Measure L2 60 75 95 120 125 145 110 130

Measure B 60 60 60 70 80 80 80 80

Measure D 12 12 12 14 14 14 12 12

Type K

(mechanical short-circuit resistance of 10,000 N) for mounting of single and multi-core cables.

Type KP

(mechanical short-circuit resistance of 25,000 N) for mounting single and multi-core cables in trefoil formation with increased short-circuit stress.

Type KS(mechanical short-circuit resistance of 12,500 N) for mounting single and multi-core cables in trefoil formation.

Sheath cutter WM 20.1

Sheath cutters are used to remove exterior PE insulations and XLPE insulations off medium voltage cables.

Stripping tool WL 20.1

Stripping tools are used to remove the welded exterior conductive layer of XLPE-insulated medium voltage cables.

Additional accessories

Products for cable installation and laying:• Earthingmaterialforcableswithcoppertapescreens• Shrinkablecablebreakoutforthree-coreXLPEcables• RUK500cablecleaningagentforcablesheathsandinsulations• Cablebundlingtapeforshort-circuit-proofbundlingofsingle-corecables

ACCESSORIES FOR TERMINATIONS, JOINTS AND TRANSITION JOINTS

Polyamide fixing clamps for single and multi-core cables.Glass-fibre reinforced polyamide fixing clamps are used to fasten cables at poles, in stations and cable racks.

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Südkabel 3004 E

Südkabel GmbH

Rhenaniastrasse 12-30 | 68199 Mannheim Phone: +49 621 8507 01 | Fax: +49 621 8507 294 E-mail: [email protected]

www.suedkabel.de

Note:We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. Südkabel does not accept any responsibility whatsoever for potential errors or possible lack of information in this document. We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction – in whole or in part – is forbidden without Südkabel’s prior written consent.

Copyright © 2014 Südkabel. All rights reserved.

Cables

• XLPE-insulatedcablesfrom6kVto500kV

Accessories for medium, high and extra-high voltage cables

• Outdoorterminations

• Conventionalandplug-interminationsforSF6 switchgears and transformers

• CableJoints

• Plug-interminationsforouterandinnerconesystems

• Mediumvoltagecablelinks

• Accessoriesforelectrostaticprecipitatorcables

Cable systems

• TurnkeyXLPE-insulatedcablesystemsupto500kV

Services

• Consultingserviceonapplicationrelatedquestions

• Trainingforinstallationpersonnel

• Cablelayingandsupervisionoflaying

• Installationofaccessories

• Commissioning

• Aftersalesservices

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terminations and joints for xlpe-insulated 12–36 kv … · optimisations have led to today's...

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