1. CEF-OT High Voltage Fuse-Links
Medium Voltage Products
CEF-OT short-circuit current limiting fuse-links are
designed and tested according to IEC 60282-1:2005.
Dimensions of fuse-links are in accordance with IEC
60282-1:2005, Type II. Features of CEF-OT High Voltage
Fuse-links are as follows:
– Low minimum breaking current,
– Low power losses,
– Low electric arc voltage,
– High breaking capacity,
– High short-circuit current limiting capacity,
– 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.
Application
CEF-OT fuse-links protect transformers, capacitors banks,
cable feeders and overhead lines against short-circuit con-
sequences. Fuse-links were designed specially to be used
in combination with TPC bushing and TPC II switch-discon-
nector, which are used in ABB’s TPC distribution transfor-
mers. The design of fuse-links provides resistance to high
temperatures and vacuum during transformers manufacturing
process.
Ambient operating environment
CEF-OT fuse-links can be operated under the following con-
ditions:
– 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.
Technical data and ordering numbers of CEF-OT fuse-links
Fuse-link
type
Catalogue number Rated
voltage [kV]
Rated
current [A]
Minimum
breaking
current I3
[A]
Maximum tested
short-circuit
current I1
[kA]
Rated
fuse-link
resistance at
20°C [mΩ]
Rated power
losses in air
[W]
Striker force at
a distance of
4 mm from
end cap [N]
CEF-OT TPC1 1YMB531041M0004 12/24 20 80 31.5 (at 12 kV)
16 (at 24 kV)
115.5 70 130
CEF-OT TPC1 1YMB531041M0006 12/24 31.5 80 31.5 (at 12 kV)
16 (at 24 kV)
69.2 105 130
CEF-OT TPC2 1YMB531041M0014 12/24 20 80 31.5 (at 12 kV)
16 (at 24 kV)
115.5 70 130
CEF-OT TPC2 1YMB531041M0016 12/24 31.5 80 31.5 (at 12 kV)
16 (at 24 kV)
69.2 105 130

2. 2 CEF-OT High Voltage Fuse-Links
Dimensional drawings of CEF-OT fuse-links
CEF-OT TPC1 fuse-link
CEF-OT TPC2 fuse-link
Operating characteristics of CEF-OT fuse-link striker
CEF-OT TPC2 fuse-link
CEF-OT TPC1 fuse-link
0
45
10
15
M
359
5
±1,2
1
20
63,5
-67
2,5
Striker
67
12
M
45
12
8
63,5
±1,2
6
6
2,5
-
359
0
1
10
16
Max. real spring lead
14
60
70
80
90
100
110
120
130
4 6 8 10 12
50
16 18 200
140
L[mm]
F[N]
2
3.
Remarks:
L[mm] - length from end face of fuse end-cap.1.
F[N] - striker force.2.
Striker energy - 2J (from 0 mm to 20 mm of travel).
150
spring lead
Max. real
70
100
110
120
130
90
6 8 10
50
4
60
0
80
140
2 L[mm]
F[N]
150
Remarks:
L[mm] - length from the end face of fuse end-cap.1.
F[N] - striker force.2.
Striker energy - 1J (from 0 mm to 8 mm of travel).3.

3. CEF-OT High Voltage Fuse-Links 3
Time-current characteristics of CEF-OT fuse-links
The characteristics are valid for CEF-OT TPC1 and CEF-OT
TPC2 fuse-links, they are the same for all voltages and are
determined for test from cold condition of a fuse-link. In the
uncertain area of breaking currents, curves are marked by
dashed lines. Curve tolerance is ±10% with reference to the
prospective current.
Cut-off current characteristics of CEF-OT fuse-links
Characteristics are valid for CEF-OT TPC1 and CEF-OT TPC2
fuse-links, they are the same for all voltages and are valid for
frequency 50 Hz.
0,01
0,1
1
10
100
1000
10000
1 10 100 1000Prospective current [A]
Pre-arcingtime[s]
20A 31,5A
0,1
1
10
100
0,1 1 10 100
Prospective short circuit current Irms [kA]
Maximumcut-offcurrentIpeak[kA]

4. 3405PL589-W2-en.Edition01.2012
For more information please contact:
ABB Sp. z o.o.
Branch office in Przasnysz
59 Leszno Str.
06-300 Przasnysz, Poland
Phone: +48 29 75 33 200
Fax: +48 29 75 33 327
e-mail: marketingmv.plabb@pl.abb.com
www.abb.com
We reserve the right to make technical changes or modify
the contents of this document without prior notice. With
regard to purchase orders, the agreed particulars shall
prevail. ABB Sp. z o.o. does not accept any responsibility
whatsoever for potential errors or possible lack of information
in this document. We reserve all rights in this document and
in the subject matter and illustrations contained therein. Any
reproduction, disclosure to third parties or utilization of its
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© Copyright 2012 ABB
All rights reserved