Transformer Fuses – MV HV Fuses 2kV-24kV Transformers IEC ABB CEF-VT

Transformer Fuses - MV HV Fuses 2kV-24kV Transformers IEC ABB CEF-VT

Transformer Fuses – MV HV Fuses 2kV-24kV Transformers IEC ABB CEF-VT


MV HV | Medium & High Voltage Electrical Circuit & Equipment Protection 

Voltage Transformer Protection up to 7.2kV/24kV

Rated Voltages |  3/7.2 kV – 10/24 kV
Rated Currents |  6.0.5 A – 6.3 A

ABB CEF-VT transformer fuses are current-limiting fuses which are especially suited for compact MV-HV switchgear and for switch-fuse combinations, 7.2-24kV, 2-6.3A. MV-HV fuses, manufactured by ABB,  are suitable for 6.6/7.2kV and up to 24kV transformer applications in accordance with IEC specification.

ABB CEF-VT-TCU transformer fuses have integrated thermal released striker pins allowing the fuse release to be temperature dependant and overload spots which significantly reduce the fuse temperature during the interruption process. The CEF-VT fuse has a high capability up to 63kA and temperature control units increase application safety for gas insulated panels, switchgear and electrical equipment up to 24kV.

CEF-VT current limiting fuses are back-up type medium voltage fuses which limit the value of prospective short-circuit currents during the interruption process and extended the life time of nearby installed electrical equipment. ABB CEF-VT fuses when used in combination with load break switches equipped with fuse tripping system ensures control over the full range of overload and short-circuit currents.

Transformer Fuses - MV HV Fuses 2kV-24kV Transformers IEC ABB CEF-VT

ABB CEF-VT Fuses | Contact us for Price | Stock | Technical Support | ABB MV Electrical Products

ABB CEF-VT Transformer Fuses

Features & Benefits

  • Low minimum breaking current of MV transformer fuse
  • Low power losses, specially suitable in enclosed compartments
  • High breaking capacity medium voltage transformer fuses
  • High current limitation
  • Type tested according to IEC 60282-1
  • Versions CEF-VT-TCU equipped with Temperature Control Unit, which protects against high temperature in enclosed compartments
  • Can be equipped with medium type striker, which is activated immediately when the fuse-elements melt
  • Dimensions according to IEC 60282-1 and DIN 43625
  • Unified medium voltage ratings for more application flexibility
  • Single MV fuse version for both indoor and outdoor operating conditions
  • Graved fuse data for long term recognition
  • Welded current path secures a stable electrical contacts with active breaking elements
  • ABB Optional Accessories – Fuse clips, fuse extension adaptor, indoor & outdoor fuse base with optional fuse presence/blown indication, test fuse link for striker system adjustment and operating tong for fuse replacement
  • Also: MV HV Surge Arresters 11kV 33kV

➡ IEC 60282-1:2020 applies to all types of high-voltage current-limiting fuses designed for use outdoors or indoors on alternating current systems of 50 Hz and 60 Hz and of rated voltages exceeding 1000V.

ABB CEF-VT Transformer Fuses – Fuse Ratings & Dimensions

New Smartcode CEF-VTRated Current ln (A)Maximum Tested Breaking Current l1 (kA)Mininim Tested Breaking Current l3 (A)Rated Power Pn (W)Striker Pin Force (N)Resistance (mΩ)Diameter D (mm)Weight (kg)Catalogue Number CEF-VTCatalogue Number CEF-VT-TCU
Rated Voltage: 6/12kV Length ,,e”: 192mm
Rated Voltage: 6/12kV Length ,,e”: 292mm
Rated Voltage: 10/17.5kV Length ,,e”: 192mm
Rated Voltage: 15/24kV Length ,,e”: 292mm
Rated Voltage: 15/24kV Length ,,e”: 442mm


ABB CEF-VT Transformer Fuses

ABB CEF-VT Transformer Fuses – Dimensions

fUSES FOR voltage transformer protection | mEDIUM vOLTAGE

ABB recommends using voltage transformer fuses type ABB WBP and ABB CEF-VT in the energy supply system of medium-voltage single/double insulated poles voltage transformers. Voltage transformer fuses provide:

  1. electrical shock protection in case of main insulation damage to the voltage transformer and high-voltage penetration into the low-voltage side of the voltage transformer,
  2. protection of the MV switchgear apparatus from internal short circuits.

The main selection rules concerning voltage transformer fuses are similar to those specified for current limiting fuses (type CEF) used in the protection of distribution transformers.

MV HV Transformer Switchgear Cable Connectors & Terminations

Thorne & Derrick also distribute an extensive range of MV-HV Joints, Connectors & Terminations for installing medium/high voltage power cables onto gas insulated switchgear networks up to 33kV – this includes outer cone (Nexans Euromold) and inner cone (Pfisterer CONNEX) type cable plug and connectors. MV-HV fuses are available for transformer, switchgear, motor circuit and capacitor protection.

Cable Connectors Terminations

ABB – GIS Gas Insulated Switchgear For MV HV Medium/High Voltage Power Systems, 11kV/33kV & EHV


Data Sheets