Euromold Connectors | Voltage Detection & The Capacitive Test Point Source

Published 27 Sep 2022

Nexans

VOLTAGE DETECTION POINT

Euromold Connectors

The connectors manufactured by Euromold are provided with a capacitive test point: the voltage detection point (VD point). This enables a local check to confirm that the product is de-energised prior to disconnection (use a high resistance test device – approx. 250 MΩ).

The capacitive test point consists of a metallic insert, moulded into the insulation and electrically connected to a convenient external terminal.

➡ Thorne & Derrick can support the specification and supply of the correct MV HV connector – heat shrink, cold shrink and push-on joints and terminations are also available, contact us with your requirements or technical queries.


Nexans

Thorne & Derrick have an International Distribution Agreement with Nexans Power Accessories UK and are their main stockists and suppliers for their range of Heat Shrink Joints & Terminations up to 33kV as well as their Euromold connectors.


Under normal operating circumstances this terminal is earthed by its conductive rubber cap. The cap must be removed prior to testing. When applying the test device, a capacitive potential divider is effectively established.Test Point & Line Potential

The components of which are:

  • Ctc: between test point and line potential
  • Ctg: between test point and earthed conductive screen
  • Cm: representing the capacity of the detection apparatus

The voltage available at the test point is directly proportional to the line voltage depending on the capacitance ratio. Although relatively high voltages can be present on the test point after removing the conductive cap, the overall available energy is minimal and any potential would disappear instantaneously if accidentally touched by an operator or other personnel. The current transfer would be a fraction of a micro Ampere and imperceptible to human touch.


Key:

  1. Key Conductive rubber cap
  2. Metallic insert (capacitive test point)
  3. EPDM conductive screen (earth potential)
  4. EPDM insulation
  5. EPDM internal screen (line potential)
  6. Metallic insert (line potential)

Separable Connectors

Euromold 152SR – 158LR 400LR

The Euromold 152SR straight connector with 250A current rating is designed for Interface A and covers voltages from 12kV to 24kV with a maximum conductor size of 95sqmm.

Euromold 152SR straight connectors can be supplied as an elbow connector (158LR) and with surge arresters (156SA) and plug-in type epoxy bushings for oil filled and dry type MV equipment – all suitable for use with Interface A type bushings on SF6 gas-insulated switchgear.

Connectors 152SR - 158LR 400LR

 


Euromold 152SR-158LR 400LR

The Euromold 480TB tee connector with 630A – 1250A current rating is designed for Interface C and covers voltages from 12kV to 42kV with a maximum conductor size of 300sqmm.

Euromold 480TB plug-in tee connectors can be supplied as a straight connector (450SR) or a coupling connector (800PB804PB or 809PB) and with surge arresters (800SA or 300SA) – all suitable for use with Interface C Compact type bushings on SF6 gas-insulated switchgear.

Connectors 480TB - 484TB - 489TB


Euromold 909TB 676LRA 750LR-775LR

The Euromold 909TB tee connector with 250A current rating is designed for Interface F and covers voltages from 12kV to 42kV with a maximum conductor size of 1200sqmm.

Euromold 909TB plug-in tee connectors can be supplied as a coupling connector (909PB) and compatible with plug-in type epoxy bushings – all suitable for use with Interface F type bushings on SF6 gas-insulated switchgear.

Connectors 909TB - 676LRA - 750LR - 775LR


Nexans Cable Accessories

Nexans Cable Accessories

Nexans manufactured Cable Accessories are in extensive service throughout the UK DNO power grid – the Euromold connectors are approved and are approved by several DNO/IDNO operators dependent on the product, voltage and network.

The JTS Joints and MONO Terminations are increasingly preferred and adopted by NERS Accredited Independent Connection Providers (ICPs) working on 11kV private networks.

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