1. Oil-tight MV fuse CEF-OT with TPC bushings
ABB Medium Voltage Products, Fuses, Tomasz Komalski, 2011
Oil-tight MV fuse CEF-OT with TPC bushings
© ABB Group
November 18, 2018 | Slide 1

2. Oil-tight MV fuse CEF-OT Main features
Special design for installation inside transformer under oil,
Construction compatible with ABB TPC transformer,
Various tags for easy assembly in different solutions inside TPC or as free mounted inside transformer tank,
Design including:
Welded current path,
Heavy striker (130N),
Oil and water proof,
Double sealing system,
Fuse-link dimensions acc. to IEC Type II,
Fuse-link is dedicated to work under oil in high temperatures (80 ÷ 105 ºC) without ageing,
Possibility of working with associated switch or signaling device under oil.
© ABB Group
November 18, 2018 | Slide 2

3. Oil-tight MV fuse CEF-OT Electrical features& operating conditions
Fuse-link type
Rated voltage
Rated current
Maximum tested breaking capacity
Minimum breaking current
Rates power losses in air (W)
CEF-OT
12/24kV
20A
31,5kA at 12kV
16kV at 24kV
80A 70
31,5A
105
Ambient operating conditions
CEF-OT fuse-links can be operated under the following conditions:
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.
© ABB Group
November 18, 2018 | Slide 3

4. Oil-tight MV fuse CEF-OT Dimensions
© ABB Group
November 18, 2018 | Slide 4

5. Oil-tight MV fuse CEF-OT Striker pin characteristics
© ABB Group
November 18, 2018 | Slide 5

6. Oil-tight MV fuse CEF-OT TPC bushings data
Application
Indoor and outdoor distribution transformers type TPC
Equipped with current-limiting fuse-link 5A-31.5A
Standards
IEC – Insulated bushings for alternating voltages above V
IEC 815 – Selection and dimensioning of high-voltage insulators (outdoor type) intended for use in polluted conditions – II class
IEC – High voltage fuses
HN-52-S-24 – EDF Standard for mechanical strength
Ratings
f – 50 Hz, Um – 24 kV, PD level according to IEC (1.5Um/ pC, 1.05Um/3 - 5 pC)
© ABB Group
November 18, 2018 | Slide 6

7. Oil-tight MV fuse CEF-OT TPC bushings data
© ABB Group
November 18, 2018 | Slide 7

8. © ABB Group
November 18, 2018 | Slide 8