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CP No.: CP9716 Rev. 02
Page: 1 of 9
CERTIFIED
TEST REPORT
Companion II 8.3kV, 17.2kV and 23kV 12K - 40K
Backup Fuses
Rev. 02 DATE: June 3, 2010 • ORIGINAL REPORT DATE: June 13, 1997 • © Cooper Power Systems, Inc.
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CP No.: CP9716 Rev. 02
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Companion II 8.3kV, 17.2kV and 23kV 12K - 40K Backup Fuses
CERTIFICATION
Statements made and data shown, to the best of our knowledge and belief,
are correct and within the usual limits of commercial testing practice.
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Overview
The Cooper Power Systems Companion II 12K through 40K fuses are designed to be applied
as backup current limiting fuses. In this application, the Companion II fuse provides
protection against high current faults and limits the peak current and the amount of let-through
energy to the protected equipment. The CPS Companion II fuse is typically applied in series
with an expulsion fuse. When applied in series with an expulsion or other type of low current
interrupting device, the combination provides “full range” protection.
Certification Tests as required by IEEE Std C37.41-2008
1. Interruption Tests at Line-to-Neutral Rated Voltage
• Series 1 Rated Maximum Interrupting Current
• Series 2 Critical Current
• Series 3 Rated Minimum Interrupting Current
2. Temperature Rise Tests
3. Time Current Characteristic Tests
4. RIV Tests
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CP No.: CP9716 Rev. 02
Page: 4 of 9
INTERRUPTION TESTS
Requirements
Back-up current-limiting fuses are required to operate on high available fault currents and
limit the fault current magnitude and energy. They must interrupt these fault currents so that
the other pieces of connected equipment are isolated from the electrical distribution system.
Objective
The objective of these tests is to verify the interrupting performance of the Companion II
fuse for applications at the respective voltage rating by testing according to the
requirements specified in ANSI/IEEE C37.41-2008, clause 6.6 and C37.47-2000.
Procedures
These tests were run on production fuses which were assembled using standard methods
and procedures. The testing was conducted at ambient temperature.
Test Results
The Companion II 12K – 40K fuses successfully interrupted each respective test current.
The performance parameters are detailed in Table 1:
Table 1: Interruption test results
Test
current
Test
Voltage
close
angle
Part number
A
kV
deg
8.3kV 12K
50600
8.3
8.3kV 12K
8.3kV 12K
50600
50600
2346
8.3kV 12K
8.3kV 12K
Melt I²t
Total I²t
Total
Energy
Melt time
Clear
time
Withstand
X/R
kA²sec
kA²sec
kJ
msec
msec
(min)
40
35
5.30
9.56
22.0
0.360
---
1
8.3
65
35
5.50
12.1
25.4
0.290
---
1
8.3
8.4
65
7
35
12
5.85
4.31
11.7
9.32
24.2
61.0
0.290
3.283
-----
1
10
2392
8.5
8
12
4.27
9.65
63.5
3.217
---
10
8.3kV 12K
2360
8.4
9
12
4.33
9.08
60.1
3.320
---
10
8.3kV 12K
489.8
8.35
---
1.7
6.66
6.91
---
27.800
29.800
10
8.3kV 12K
507.8
8.35
---
1.7
6.82
7.12
---
26.500
28.600
10
8.3kV 40K
50600
50600
8.4
8.4
20
55
30
30
59.2
60.0
124
160
116.0
149.0
0.900
0.670
-----
1
8.3kV 40K
8.3kV 40K
50600
8.4
55
30
60.9
151
138.0
0.650
---
8.3kV 40K
8280
8.3
7
12
58.3
140
243.9
---
---
1
10
8.3kV 40K
8310
8.3
7
12
57.9
139
241.7
---
---
10
8.3kV 40K
8.3kV 40K
8280
8.3
8
12
55.9
144
253.8
---
---
10
1001
8.4
-97
2.1
261
267
20.4
262.040
268.880
10
1
8.3kV 40K
1002
8.4
43
2.1
250
255
20.3
246.850
253.930
10
17.2kV 12K
43500
17.3
40
35
5.40
10.0
50.4
0.370
---
1
17.2kV 12K
43500
17.3
65
35
5.60
12.3
57.7
0.290
---
1
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17.2kV 12K
43500
17.3
65
35
5.60
12.0
55.5
0.310
---
17.2kV 12K
2380
17.6
11
12
4.43
10.7
143.8
3.129
---
1
10
17.2kV 12K
2365
17.3
9
12
4.24
10.6
139.5
3.187
---
10
17.2kV 12K
2373
17.4
11
12
4.16
10.7
141.3
3.078
---
10
17.2kV 12K
510
18.0
-76
2.3
7.06
7.61
26.1
29.043
37.474
10
17.2kV 12K
502
17.9
-97
2.3
7.27
7.73
7.0
29.598
32.044
10
17.2kV 40K
43500
17.4
30
30
56.4
136
276.0
1.080
---
1
17.2kV 40K
43500
17.4
55
30
57.1
164
341.0
0.890
---
1
17.2kV 40K
43500
17.4
55
30
59.8
170
354.0
0.740
---
17.2kV 40K
9390
17.2
4
11
56.0
144
475.7
3.215
---
1
10
17.2kV 40K
9400
17.2
5
11
55.3
147
486.9
3.180
---
10
17.2kV 40K
9390
17.2
7
11
54.7
152
499.6
3.085
---
10
17.2kV 40K
1000
17.2
106
2.2
193
214
35.7
193.400
200.700
10
17.2kV 40K
1000
17.2
-91
2.2
225
232
64.4
205.700
217.100
10
23kV 12K
31000
23.1
40
35
5.10
9.24
70.2
0.460
---
1
23kV 12K
31000
23.1
65
35
5.10
10.8
81.3
0.350
---
1
23kV 12K
31000
23.1
65
35
5.40
10.8
78.2
0.370
---
23kV 12K
2350
23.3
8
12
4.28
10.4
175.9
3.217
---
1
10
23kV 12K
2360
23.4
8
12
4.12
10.2
177.2
3.169
---
10
23kV 12K
2360
23.4
10
12
4.04
9.89
173.2
3.118
---
10
23kV 12K
517
24.1
113
2.3
6.85
7.34
12.3
27.910
31.099
10
23kV 12K
500
23
-134
2.3
6.87
8.22
19.7
29.040
37.474
10
23kV 25K
31000
23
40
30
19.8
50.6
225.0
0.680
---
1
23kV 25K
31000
23
55
30
21.4
56.1
250.0
0.630
---
1
23kV 25K
31000
23
55
30
21.3
57.3
254.0
0.610
---
23kV 25K
5470
23
16
12
17.2
45.7
316.8
2.809
---
1
10
23kV 25K
5500
23
9
12
17.8
44.7
312.1
3.080
---
10
23kV 25K
5470
23
10
12
17.0
45.8
323.3
3.075
---
10
23kV 25K
514
23
-60
2.2
112
115
42.2
439.400
454.700
10
23kV 25K
508
23
137
2.2
84.3
86.9
33.7
314.800
326.700
10
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CP No.: CP9716 Rev. 02
Page: 6 of 9
TEMPERATURE RISE TESTS
Requirements
Backup current limiting fuses are required to carry all normal system steady state currents
without incurring temperature rises that would be detrimental to any of the fuse parts.
Objective
The objective of this test is to verify that the temperature rise does not exceed the values
specified in ANSI C37.47 and ANSI C37.40.
Procedures
Production fuses were tested per requirements specified in ANSI/IEEE C37.41 (Clause, 10).
Current was supplied by a regulated current source. Temperature levels of the various
current carrying parts were recorded throughout the duration of the test. Note that the fuse
itself does not have a continuous current rating – there is an implied rating – that the fuse
must carry about 1.5 times the rating of the cutout link it is used in series with – i.e. 60 A for
the 40K fuse.
Test Results
Temperature rises were below maximum temperature rise levels allowed by standard IEEE
C37.40-2003 Table 1.
Conclusion
The Companion II 12K – 40K fuses met the temperature rise requirements of Table 2 in
ANSI/IEEE C37.40.
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TIME CURRENT CHARACTERISTICS TESTS
Requirements
Time current characteristic curves are primarily for application selections and system
coordination studies. These curves, minimum melt and maximum clear, detail the
performance data of a particular fuse design.
Objective
Establish time current characteristic curves for the 12K – 40K Companion II fuses per
ANSI/IEEE C37.47-1981 (R-1992) requirements.
Procedure
Testing was performed on production fuses which were assembled using established
methods and procedures.
Minimum melt and maximum clear time current characteristic curves were developed using
ANSI/IEEE C37.41-2008, Clause, 12 requirements as a guideline. The curves reflect the
typical industry tolerances ± 10% of the average melting current. An allowance for arcing
time is also added to the total clearing curve to determine the fuse’s total clearing
characteristics. Testing was performed at ambient temperatures.
Results and Conclusions
The minimum melt and maximum clear TCC curves for the 12 – 40K Companion II backup
current limiting fuses were developed using the procedure described above and are detailed
in R240-91-165.
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Page: 8 of 9
RIV Testing
Requirements
RIV performance data for the Companion II fuse family is necessary in order to ensure
proper performance of the fuse for the manner in which it is mounted in the field.
Objective
Determine RIV performance levels of the highest voltage and K-rated Companion II fuses;
17.2kV 40K, 23kV 12K and 23kV 25K. The highest rated fuses were chosen to represent
the worst case condition; therefore this would represent successful performance of the
entire Companion II fuse family.
Procedure
Testing was performed as detailed in ANSI C37.41-2008, Clause 8. Testing was conducted
by mounting the fuse on top of a 27kV Type L cutout and was performed at 1 MHz. The
fuses were secured to the cutout connector in the same manner as is typical field practice.
An Electro-Metric meter, model EM-7535 S/N 144, was used to record the data.
Results and Conclusions
Fuse Part
number
FAH17KV40K
FAH23KV12K
FAH23KV25K
Applied rms
Voltage
(kV)
15.8
15.8
15.8
Meter Reading
(µVolts)
<10
<10
<10
Corrected
Reading
(µVolts)
<10
<10
<10
Barometer = 760.5 mmHg
Dry Bulb = 23.5°C
Wet Bulb = 16.5°C
All fuses were less than the permissible maximum value, 250 µVolts, specified by
standards. A 10 µVolt reading is considered RIV inception.
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CP No.: CP9716 Rev. 02
Page: 9 of 9
REVISION HISTORY
Revision
no.
Date of
addition/Change
02
6/3/10
Addition/Change made to report
Updated report with new interruption data and RIV results
Quality from
Cooper Industries
P.O. Box 1640, Waukesha, WI 53187