T-Plug Cable Connectors – 33kV Medium Voltage Switchgear Connectors For Siemens NXPLUS C
Published 31 Jan 2018
Siemens – Gas Insulated Switchgear For Secondary Distribution MV Medium Voltage Power Systems Up To 33kV
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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 Connectors
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 RSTIÂ66CP-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 AÂ 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-66CPÂM16 | ||
| 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-66CPÂM16 | ||
| 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 endsÂ
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 |
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.
âž¡ View complete range of Surge Arresters 11kV 33kV MV HVÂ
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.
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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.
