TERMINATIONS AND JOINTS FOR XLPE-INSULATED kv MEDIUM VOLTAGE CABLES

Size: px

Start display at page:

Download "TERMINATIONS AND JOINTS FOR XLPE-INSULATED kv MEDIUM VOLTAGE CABLES"

Theodore Weaver
6 years ago
Views:

1 Accessories TERMINATIONS AND JOINTS FOR XLPE-INSULATED kv MEDIUM VOLTAGE CABLES Cable Systems, Cables and Accessories

2 Test values for terminations 1) Testing to DIN VDE (Testing methods according to EN 61442) U 0 /U 6/10 U m 12 Voltage range test values 12/ /30 36 Test requirements DC withstand voltage, dry kv min at 6 U 0, no breakdown or flashover AC withstand voltage, dry kv min at 4.5 U 0, no breakdown or flashover AC withstand voltage, wet 2) kv min at 4 U 0, no breakdown or flashover Partial discharge at increased temperature kv max. 10 pc at 1.73 U 0 Impulse at increased temperature kv impulses at each polarity, no breakdown or flashover Electrical heating cycles in air kv cycles at 2.5 U 0, no breakdown Water bath testing 2) kv cycles Partial discharge at ambient and increased temperature kv max. 10 pc at 1.73 U 0 Thermal short circuit (screen) according to EN section 10 2 short circuits at I sc, no breakdown Thermal short circuit (conductor) according to EN section 11 2 short circuits to increase the conductor temperature to Θ sc, no breakdown Dynamic short circuit to be agreed upon 1 short circuit at I d, no breakdown Impulse at ambient temperature kv impulses at each polarity, no breakdown or flashover AC withstand voltage, dry kv min at 2.5 U 0, no breakdown or flashover Salt spray 2) kv Duration: 1000 h at 1.25 U 0 Relative humidity 3) kv Duration: 300 h at 1.25 U 0 1) Excerpt of test values for standard voltage range 2) Only applies to outdoor terminations 3) Only applies to indoor terminations 2

Content Test values for terminations 2 Welcome to Südkabel 3 Terminations 4-7 Indoor terminations 4 Outdoor terminations 5 Termination for electrostatic precipitators 111 kv s 6 Accessories for

3 Content Test values for terminations 2 Welcome to Südkabel 3 Terminations 4-7 Indoor terminations 4 Outdoor terminations 5 Termination for electrostatic precipitators 111 kv s 6 Accessories for indoor and outdoor terminations 7 Joints and transition joints 8-10 Accessories for terminations, joints and transition joints 11 The systematic approach to cable accessories Our offer 12 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 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. 3

4 Indoor terminations Multi-range TERMINATIONS kv 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 coon 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 A breakout is required for application with three-core cables. For cable mounting, special cable fixings are available. 1 2 D 3 H 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 Type *) for cables according to DIN VDE Admissible core diameter Measure H Measure D Conductor cross section *) ² SEHDI SEI SEI SEHDI SEI SEI SEHDI SEHDI SEHDI SEHDI SEHDI SEHDI SEHDI

5 Outdoor terminations Multi-range TERMINATIONS kv 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 coon 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 A breakout is required for application with three-core cables. For mounting at pole traverses or scaffolding, special mounting clamps are available H D Cable lug for conductor connection 2 Insulation tube 3 Insulator 4 Stress control element 5 Exterior conductive layer 6 Sealing kit 7 Ribbon clamp 8 Screening cable lug 9 Exterior screen Type Admissible core diameter Measure H Measure D Conductor cross section *) ² SEHDF SEHDF SEF SEHDF SEHDF SEF SEHDF SEHDF SEHDF SEHDF SEHDF SEHDF SEHDF *) for cables according to DIN VDE

6 Termination for electrostatic precipitators 111 kv s These terminations are especially designed for type A2XSY 1x50RM/ kv s electrostatic precipitators and meet the special requirements of electrostatic filters. 1 D 2 H Conductor contact pin 2 Insulator 3 Stress control element 4 Exterior conductive layer 5 Sealing kit 6 Ribbon clamp 7 Screening cable lug 8 Exterior screen Functionality The components of electrostatic filters are subject to electrical impulseshaped stresses. The voltage increases according to the charging properties of a capacitor and abruptly drops after voltage flashover in the filter. Afterwards, the charging process is restarted. Type Bore diameter of the insulating body Admissible core diameter Measure H Measure D Conductor cross section SEHDL SEHDL ² 6

7 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. 1 D SEIK SET 2 SEW SEI 3 D 2 min 110 min BSW fixing clamp 2 Reduction insert 3 BSS fixing clamp D Preassembled cable and high flexible cable links kv The minimum bending radius typical for flexible trailing cables is ideal for installation in narrow areas. Rationalization of substation assembly thanks to no termination installation being carried out at the installation site. The accessory equipment of the links can be chosen freely for any combination of terminations and plug-type connectors admissible for that particular type of cable or trailing cable. Output check can be agreed upon. Type Admissible current load *) A Short circuit current 1 s Outer diameter Minimum bending radius Trailing cable 24 kv NTMCWOEU 35 ² NTMCWOEU 50 ² Cable 24 kv N2XSY 35 ² N2XSY 50 ² 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 are especially designed for SEHDF outdoor terminations (for horizontal mounting) 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 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 coon dimensions on panels in 5 increments. Various reducers enable adjustment of individual external cable diameters. *) Air installation at an ambient temperature of 30 C 7

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

8 JOINTS AND TRANSITION JOINTS JOINTS kv The SEV joint with slip-on technology serves as the connection between two plastic-insulated cables with 12, 24 or 36 kv 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 The multi-range capability enables use of up to five cross sections with one insulating body size. The single-part, triple-extruded insulating body is made of silicone rubber and consists of a refractive stress control element, silicone insulation and an external conductive layer. The conductor connection can either be realised with screw or press-fit connectors. Connections within one joint size can be realised without any problems. The metal screen of the joint consists of one winding of braided copper tape. The external mechanical protection is usually provided by a heat shrinkable tube. Optionally, corrosion protection tape can be used. SEV multi-range joints meet the requirements of DIN VDE Type Voltage U max kv Conductor cross section ² Admissible core diameter SEV SEV SEV SEV SEV SEV SEV SEV SEV SEV SEV SEV

JOINTS AND TRANSITION JOINTS TRANSITION JOINTS 24 kv SEVü transition joints with slip-on technology are used to connect paper-insulated cables with plastic-insulated cables.

9 JOINTS AND TRANSITION JOINTS TRANSITION JOINTS 24 kv SEVü transition joints with slip-on technology are used to connect paper-insulated cables with plastic-insulated cables 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 Type Voltage kv For connection of single-core XLPE cables and paper-insulated... Paper-insulated cable ² Conductor cross section XLPE cable ² Admissible core diameter SEVü Single-core cables AM/SEVü-B SL-type cables AM/SEVü-H H-type cables

JOINTS AND TRANSITION JOINTS TRANSITION JOINTS 24 kv SEHDVü transition joints with slip-on technology are used to connect paper-insulated cables with plastic-insulated cables.

10 JOINTS AND TRANSITION JOINTS TRANSITION JOINTS 24 kv SEHDVü transition joints with slip-on technology are used to connect paper-insulated cables with plastic-insulated cables L 1 XLPE cable 2 H-type or SL-type cable 3 Shrinkable cable breakout 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 Type Conductor cross section Length measure L XLPE cable ² Earthing cable ² approx. in SEHDVü SEDVü SEHDVü SEHDVü SEHDVü AM/SEHDVü AM/SEHDVü AM/SEHDVü AM/SEHDVü AM/SEHDVü

ACCESSORIES FOR TERMINATIONS, JOINTS AND TRANSITION JOINTS Polyamide fixing clamps for single and multi-core cables.

L 2 d L 2 L 1 B d L 2 d B L 1 L 1 B L Type K (mechanical short-circuit resistance of 10,000 N) for mounting of single and multi-core cables.

Type KS (mechanical short-circuit resistance of 12,500 N) for mounting single and multi-core cables in trefoil formation. Sheath cutter WM 20.

11 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. L 2 d L 2 L 1 B d L 2 d B L 1 L 1 B L 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: Earthing material for cables with copper tape screens Shrinkable cable breakout for three-core XLPE cables RUK500 cable cleaning agent for cable sheaths and insulations Cable bundling tape for short-circuit-proof bundling of single-core cables Type K26/38 K36/52 K50/75 K66/90 KP29/41 KP39/53 KS26/36 KS33/46 Suitable for the following cable diametes in Measure L Measure L Measure B Measure D

12 OUR OFFER Cables XLPE-insulated cables from 6 kv to 500 kv Cable systems Turnkey XLPE-insulated cable systems up to 500 kv Accessories for medium, high and extra-high voltage cables Outdoor terminations Conventional and plug-in terminations for SF 6 switchgears and transformers Cable Joints Plug-in terminations for outer and inner cone systems Medium voltage cable links Services Consulting service on application related questions Training for installation personnel Cable laying and supervision of laying Installation of accessories Coissioning After sales services Accessories for electrostatic precipitator cables 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. Südkabel GmbH Rhenaniastrasse Mannheim Phone: Fax: info@suedkabel.com Südkabel 3004 E

ECONOMICAL 36 kv CABLE SYSTEM FOR THE BELGIAN NETWORK

ECONOMICAL 36 kv CABLE SYSTEM FOR THE BELGIAN NETWORK J. Becker NEXANS BENELUX S.A. F. Musique ELECTRABEL S.A. ABSTRACT In order to tackle the deregulated market with confidence and in a realistic way,