T-Plug Cable Connectors – 33kV Medium Voltage Switchgear Connectors For Siemens NXPLUS C

Published 31 Jan 2018

Siemens Switchgear Cable Connectors Terminations

Siemens – Gas Insulated Switchgear For Secondary Distribution MV Medium Voltage Power Systems Up To 33kV

  • by Chris Dodds T&D - estimated reading time 5 minutes 

Thorne & Derrick International, based in the UK, are a leading distributor of cable accessories and connection systems for 33kV cables – this includes heat shrink/cold shrink joints, terminations and EPDM type screened separable connectors manufactured by Nexans Euromold.

The following information enables the specification and selection of the correct 33kV cable plug type termination or connector to suit medium/high voltage power cables used with Siemens NXPLUS C Wind switchgear.

Specifically, we confirm the current approved 33kV cable connectors for use with Interface C 33kV Bushings on gas insulated switchgear.

33kV T Plug Type Cable ConnectorsNexans Euromold

The following information table enables the selection and outlines the possible cable connection types (T-Plugs, Coupling Insert & Screened Separable Connectors) and MV surge arresters compatible with Siemens NXPLUS C Wind switchgear 33kV/36kV.

Screened cable T-plugs, also known as separable connectors, are specified to terminate and connect 33kV power cables into Siemens NXPLUS C gas insulated switchgear – the external semi-conductive layer must be earthed normally via a cable connector.

Insulated cable T-plugs (without semi-conductive layer) are not permissible – this type of MV cable plug or connector is prone to partial discharge due to the proximity to earthed parts of the switchgear. Partial discharge destroys the MV cable connector causing an arc between phase and earth.

The connection of conventional 33kV cable sealing ends or terminations via elbow adapters is not permissible either as this type of medium voltage power system is also insulated but not screened (no external semi-conductive layer).

Circuit-breaker Panels 630 A / 800 A 33kV/36kV
Number Of Cables Per Panel & Phase Connector Manufacturer Rated voltage Conductor Cross- Section sqmm Cable Insulation T-Plugs/Phase Bolted Coupling Inserts/ Coupling Plugs / Bolted Surge Arresters With Coupling Arresters/Phase Inserts Coupling Unit
1 Nexans Euromold 36kV 50 to 240 EPDM 1x M400TB/G 1x 400PB-5(10)SA-xxx
36kV 50 to 240 EPDM 1x M430TB/G 1x 300SA-10-xx
36kV 50 to 630 EPDM 1x M484TB/G 1x 800SA-10-xx
36kV 300 to 630 EPDM 1x M440TB/G 1x 400PB-5(10)SA-xxx
Südkabel 36kV 70 to 300 Silicone 1x SET 36
36kV 70 to 500 Silicone 1x SEHT 33 1x MUT 33 1x KU 33
nkt Cables 36kV 25 to 300 Silicone 1x CB 36-630 1x CSA36-10
36kV 400 to 630 Silicone 1x CB 36-630(1250) 1x CSA36-10
Tyco Electronics Raychem 36kV 25 to 300 Silicone 1x RSTI-66xx 1x RSTI-CC-66SAxxx
36kV 25 to 300 Silicone 1x RSTI-68xx
36kV 400 to 630 Silicone 1x RSTI-66Lxx 1x RSTI-66SAxxx 1x RSTI­66CP-M16
36kV 400 to 800 Silicone 1x RSTI-69xx
2 Nexans Euromold 36kV 50 to 240 EPDM 2x M400TB/G 1x M400CP
36kV 50 to 240 EPDM 1x M430TB/G 1x M300PBM-630A 1x 300SA-10-xx
36kV 50 to 360 EPDM 1x M484TB/G 1x M804PB/G
36kV 300 to 630 EPDM 2x M440TB/G 1x M400CP
Südkabel 36kV 70 to 500 Silicone 2x SEHT 33 1x KU 33
nkt cables 36kV 25 to 300 Silicone 1x CB 36-630 1x CC36-630 1x CSA36-10
36kV 25 to 300 Silicone 2x CB 36-630 1x CP 630C
36kV 400 to 630 Silicone 2x CB 36-630(1250) 1x CC36-630(1250) 1x CSA36-10
36kV 400 to 630 Silicone 2x CB 36-630(1250) 1x CP 630C
Tyco Electronics Raychem 36kV 25 to 300 Silicone 1x RSTI-66xx 1x RSTI-CC-66xx
36kV 25 to 300 Silicone 1x RSTI-68xx 1x RSTI-CC-68xx
36kV 400 to 630 Silicone 2x RSTI-66Lxx 1x RSTI-66CP-M16
36kV 400 to 800 Silicone 1x RSTI-69xx 1x RSTI-CC-69xx

1) Observe the actual short-circuit and current carrying capacity of the cables and sealing ends

Disconnector Panel 630 A / 800 A, ring-main panel 630 A 33kV/36kV
Number Of Cables Per Panel & Phase Connector Manufacturer Rated Voltage Conductor Cross- Section sqmm Cable Insulation T-Plugs / Phase / Bolted Coupling Inserts/ Coupling Plugs / Bolted Surge Arresters With Coupling Arresters / Phase Inserts Coupling Unit
1 Nexans Euromold 36kV 50 to 240 EPDM 1x M400TB/G 1x 400PB 5(10) SA-xxx
36kV 50 to 240 EPDM 1x M430TB/G 1x 300SA-10-xx
36kV 50 to 630 EPDM 1x M484TB/G 1x 800SA-10-xx
36kV 300 to 630 EPDM 1x M440TB/G 1x 400PB 5(10) SA-xxx
Südkabel 36kV 70 to 500 Silicone 1x SET 36
36kV 70 to 500 Silicone 1x SEHT 33 1x MUT33 1x KU33
nkt Cables 36kV 25 to 300 Silicone 1x CB36-630 1x CSA36-10
36kV 400 to 630 Silicone 1x CB36-630(1250) 1x CSA36-10
Tyco Electronics Raychem 36kV 25 to 300 Silicone 1x RSTI-66xx 1x RSTI-CC-66SAxxx
36kV 25 to 300 Silicone 1x RSTI-68xx
36kV 400 to 630 Silicone 1x RSTI-66Lxx 1x RSTI-CC-66SAxxx 1x RSTI-66CP­M16
36kV 400 to 800 Silicone 1x RSTI-69xx
2 Nexans Euromold 36kV 50 to 240 EPDM 2x M400TB/G 1x M400CP
36kV 50 to 240 EPDM 1x M430TB/G 1x M300PB/G
36kV 50 to 630 EPDM 1x M484TBG 1x M804PB/G 1x 800SA-10-xx
36kV 300 to 630 EPDM 2x M440TB/G 1x M400CP
Südkabel 36kV 70 to 500 Silicone 2x SEHT 33 1x KU33
nkt Cables 36kV 25 to 300 Silicone 1x CB36-630 1x CC36-630 1x CSA36-10
36kV 25 to 300 Silicone 2x CB36-630 1x CP-630C 1x CSA36-10
36kV 400 to 630 Silicone 1x CB36-630(1250) 1x CC36-630(1250) 1x CSA36-10
36kV 400 to 630 Silicone 2x CB36-630(1250) 1x CP-630C
Tyco Electronics Raychem 36kV 25 to 300 Silicone 1x RSTI-66xx 1x RSTI-CC-66xx 1x RSTI-CC-66SAxxx
36kV 25 to 300 Silicone 1x RSTI-68xx 1x RSTI-CC-68xx
36kV 400 to 630 Silicone 2x RSTI-66Lxx 1x RSTI-66CP-M16 1x RSTI-CC-66SAxxx 1x RSTI-66CP­M16
36kV 400 to 800 Silicone 1x RSTI-69xx 1x RSTI-CC-69xx
3 Nexans Euromold 36kV 50 to 240 EPDM 1x M430TB/G 1x M300PBM- 630A
nkt Cables 36kV 25 to 300 Silicone 1x CB36-630 2x CC36-630
36kV 2x CP-630C
36kV 400 to 630 Silicone 1x CB 36-630(1250) 2x CC36-630(1250)
36kV 400 to 630 Silicone 2x CB 36-630(1250) 1x CP-630C
Tyco Electronics Raychem 36kV 25 to 300 Silicone 1x RSTI-66xx 2x RSTI-CC-66xx
36kV 25 to 300 Silicone 1x RSTI-68xx 2x RSTI-CC-68xx
36kV 400 to 630 Silicone 3x RSTI-66Lxx 2x RSTI-66CP-M16
36kV 400 to 800 Silicone 1x RSTI-69xx 2x RSTI-CC-69xx

1) Observe the actual short-circuit and current carrying capacity of the cables and sealing ends 

33kV Cables

Cable T-Plug Connectors

The following table outlines the screened separable connector, also referred to as cable sealing ends, suitable for 33kV/36kV cables according to IEC 60502-2 and VDE 0276-620.

The cable T-plug connection types are suitable for medium voltage bushings with outside cone as Interface C Type Bushings according to EN50181 for 33kV cables with conductor cross-section up to 800sqmm copper/aluminium.

Cable Type 33kV/36kV Connector Manufacturer 33kV Cable Connector Type Cross-Section sqmm Comment
1-core cable, PE and XLPE- insulatedN2YSY (Cu) and N2XSY (Cu) orNA2YSY (Al) and NA2XSY (Al) Nexans Euromold M400TB/G 50 to 240 EPDM with semi-conductive layer
M430TB/G 50 to 240 EPDM with semi-conductive layer
M484TB/G 70 to 630 EPDM with semi-conductive layer
M440 TB/G 300 to 630 EPDM with semi-conductive layer
nkt cables CB 36-630 25 to 300 Silicone with semi-conductive layer (optionally with metal housing)
CB 36-630(1250) 400 to 630 Silicone with semi-conductive layer (optionally with metal housing)
Südkabel SEHDT 33 70 to 500 Silicone with semi-conductive layer (optionally with metal housing)
Tyco Electronics Raychem RSTI-66xx 25 to 240 Silicone with semi-conductive layer, with capacitive measuring point
RSTI-68xx 25 to 240 Silicone with semi-conductive layer, with capacitive measuring point
RSTI-66Lxx 400 to 630 Silicone with semi-conductive layer, with capacitive measuring point
RSTI-69xx 400 to 800 Silicone with semi-conductive layer, with capacitive measuring point

 

33kV Cables

N2XSY XLPE PVC – 18/30 (36)kV Cable Connectors

33kV Surge Arresters

Surge arresters for pluggable onto cable T-plugs and are recommened for MV-HV cable and power systems:

  • if the 33kV cable is directly connected to the overhead line
  • if the protection zone of the 33kV surge arrester at the end tower of the overhead line does not cover the high voltage switchgear
  • in offshore wind farms
Surge Arrester 33kV/36kV 1 Cable Per Phase 2 Cables Per Phase
Circuit-breaker Panel Disconnector Panel Ring-main Panel Circuit-breaker Panel Disconnector Panel Ring-main Panel
Nexans Euromold 400PB-10-SA-45L X X X
Nexans Euromold 300SA-10-xx X X X X X X
Südkabel MUT 33 + KU 33 – * X X
nkt Cables CSA 36-10 X X X X** X X
Tyco Electronics Raychem RSTI-CC-66SAxxx –* X X –* X X
Tyco Electronics Raychem RSTI-66SAxxx –* X X –* X X

* protrudes into the floor area; possible depending on the local conditions, e.g. with sufficient hole depth

** depending on the cable plug type – contact T&D to discuss possible combinations of cable connection types and surge arresters in NXPLUS C Wind up to 36kV.

➡ View complete range of Surge Arresters 11kV 33kV MV HV 

Screened separable connectors and surge arresters must be provided by the same manufacturer and used only with one cable connected per 33kV phase. Some types of surge arresters exceed the permissible dimensions as outlined in the table above.

 

11kV 33kV Joints Terminations Connectors - Nexans Prysmian Pfisterer

Ellis Patents | Nexans | ABB Furse | Prysmian | Pfisterer – Distributors

High Voltage Joints Terminations Connectors

Credit ABB – Joint, Terminate & Connect Medium & High Voltage Cables

Thorne & Derrick

T&D are UK distributors and worldwide exporters of Cable Installation, Cable Jointing, Duct Seals, Substation & High Voltage Electrical Safety Equipment – we service UK and global businesses involved in cable installations, jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Since 1985, T&D have established a solid reputation based on Service, Integrity and Trust – contact us with your enquiry.

 

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