Transformer Fuses – MV HV Fuses 12kV-24kV Transformers IEC ABB CEF-OT
MV HV | Medium & High Voltage Electrical Circuit & Equipment Protection
Distribution Transformers Protection up to 24kV | Oil-tight Fuses
Rated Voltages | 10 kV – 24 kV
Rated Currents | 20 A – 31.5 A
ABB CEF-OT transformer fuses are current-limiting fuses which are especially suited for protecting MV-HV transformers, capacitor banks, cable feeders and overhead lines against short-circuits, 12-24kV, 20 and 31.5A.
MV-HV fuses, manufactured by ABB, are suitable for 11kV/12kV and up to 24kV transformer applications in accordance with IEC specification. ABB CEF-OT transformer fuses were designed specially to be used in combination with TPC bushings and TPC II switch-disconnector, which are used in ABB TPC medium/high voltage distribution transformers.
The design of the fuse-links provides resistance to high temperatures and vacuum during transformers manufacturing process. The CEF-OT fuse can be operated whilst immersed in transformer oil at temperatures from -40ºC up to +80ºC, within indoor and outdoor installations between -40ºC and +40ºC and inside TPC bushings.
CEF-OT 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-OT 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.
- Product Category: MV HV Medium & High Voltage Fuses
- Fuse Type: ABB CEF-OT
- Application: Transformers (MV Medium Voltage)
- Voltage: 12kV 24kV
- Specification: IEC
- See Also Medium Voltage Products | Surge Arresters | Bushings | Electrical Safety
ABB CEF-OT Transformer Fuses
Features & Benefits
- Low minimum rated breaking capacity
- Low power losses
- Low electric arc voltage
- High breaking capacity MV-HV fuses
- High short-circuit current limiting capacity medium voltage fuses
- Adopted for using in combination with switch disconnector (equipped with a striker)
- Can work inside a transformer tank, immersed in transformer oil
- Welded current path
- Type tested according to IEC 60282-1
- Dimensions of fuse-links are in accordance with IEC 60282-1
- 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-OT Transformer Fuses – Fuse Ratings
|Fuse Link Type||Catalogue Number||Rated Voltage (kV)||Rated Current (A)||Minimum Breaking Current l3 (A)||Maximum Tested Short-Circuit Current l1 (kA)||Rated Fuse Link Resistance at 20ºC (mΩ)||Rated Power Losses In Air (W)||Striker Force at a Distance of 4mm From End Cap (N)|
|CEF-OT TPC1||1YMB531041M0004||12 / 24kV||20A||80A||31.5kA (at 12kV) / 16kA (at 24kV)||115.5mΩ||70W||130N|
|CEF-OT TPC1||1YMB531041M0006||12 / 24kV||31.5A||80A||31.5kA (at 12kV) / 16kA (at 24kV)||69.2mΩ||105W||130N|
|CEF-OT TPC2||1YMB531041M0014||12 / 24kV||20A||80A||31.5kA (at 12kV) / 16kA (at 24kV)||115.5mΩ||70W||130N|
|CEF-OT TPC2||1YMB531041M0016||12 / 24kV||31.5A||80A||31.5kA (at 12kV) / 16kA (at 24kV)||69.2mΩ||105W||130N|
Back-up, current limiting fuse-link | mEDIUM vOLTAGE
ABB CEF-OT fuse-links protect MV transformers, capacitors banks, cable feeders and overhead lines against short-circuit consequences. Fuse-links were designed specially to be used in combination with TPC bushing and TPC II switch-disconnector, which are used in ABB’s TPC distribution transformers. The design of medium voltage fuse-links provides resistance to high temperatures and vacuum during transformers manufacturing process.
ABB CEF-OT fuse-links can be operated under the following conditions:
- MV fuses immersed in transformer oil, at temperatures from -40°C to +80°C
- In outdoor and indoor installations, at temperatures from -40°C to +40°C
- Inside a TPC bushing.
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.