ENo:
NONE
CPNo:
CP-9415
File Ref: Cat. 240-66
Page: 1 of 16
CERTIFIED TEST REPORT
ELFTM
Current-Limiting Dropout Fuse
June 1999. Replacas Rev. I dated 1Z19196 . @ Cooper Po,ver Systems, Inc.
ENo:
CP
No:
File Ref: Cat.240-66
NONE
Page: 2 of 16
CP-9415
Design Tests for the ELF Current-Limiting Dropout Fuse
per the following ANSI/IEEE Requirements:
c37.40
c37.41
c37.47
CERTIFICATION
Statements made and data shown are, to the best of our knowledge and belief,
correct and within the usual limits of commercial testing practice.
Engineering Manager
Tomas I. Babic
Project Leader
Olean, NY
Project Lead€r
Franksville, Wl
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Ref: Cat.240-66
Page: 3of 16
File
CP-9415
INTRODUCTION
The Cooper Power Systems' ELF Fuse has been developed to provide a lull range, energy{imiting,
silver-sand dropout fuse for use in an industry standard interchangeable cutout.
This report details testing conducted to verify fuse performance and to verify that lhe fuse meets the
requirements specified in the following ANSI/IEEE standards:
c37.40
c37.41
c37.47
lnterruption Testinq
. Minimum Current
. Critical Current
. Maximum Interrupting Level - (Refer to Table 1)
Temperature Rise Characteristics & Lonq-Term Current Carrvina Capacitv
Ti me- C u rre
nt C haracte ri sti cs
Mechanical Testino
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No:
File Ref: Cat.240-66
NONE
Page: 4 of 16
CP-9415
INTERRUPTION TESTS
REQUIREMENT
Currenl-limiting fuses are required to operate and isolate other pieces of equipment on the electrical
distribution system when overload and fault current conditions ate present. In the case of high
available fault currents, the fuse must limit the current magnitude and energy to the protected
equipment.
OBJECTIVE
The obiective of these tests were to verify the interrupting performance of the ELF fuse for use in
applicalions up to the fuse's respective voltage rating, by testing according to the requirements
specified in ANSI C37.41 and C37 .47.
PROCEDURE
Tests were run on production fuses which were assembled using established methods and
procedures. Testing was conducted per ANSI C37 .41.6. Samples were mounted in standard
interchangeable cutout mountings and testing was conducted at room temperature.
TEST RESULTS
The 8.3 kV, 15.0 kV, 23.0 kV, and 24.0 kV ELF fuse ratings successfully interrupted each respective
test current. Fuse performance parameters derived from these tests are detailed in Table t and on
pages I and |0.
CONCLUSION
The ELF fuses, forming a homogeneous series, successfully passed all interruption tests per ANSI
C37.41 and C37.47 requirements.
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No:
Table
File
CP-9415
1: Performance Ratings
Fuse Ratings
Vdtage
Ref: Cat.240-66
Page: 5 of '16
NONE
Cutout Ratings
Current
Rating
(A)
Voltage
8.3
8.3
6
8.3
8.3
8.3
12
18
15
15
15
15
Rating
(kv)
8.3
8.3
8,3
8.3
8.3
15.0
l5.o
20
25
30
40
50'
65',
80100'
6
8
Hating
(kv)
t5
15.0*
15.0*
15.O"
15,0
9y1
10
95/t't0
95/1 10
95/1
|0
95/110
25
125t150
I
24
26
7
6
125/150
12
18
1l
1l
25
27
34
43
24
26
lo
23
25
110
95/110
95i
1
t0
12V150
125t150
27
125t150
125t150
25
20
125l150
125t150
125/150
25
30
27
27
1251150
40r
27
27
23.0
6
27
23.0
R
27
23.0
23.0
12
l8
27
125/150
125t150
68
78
125t150
125t150
't251150
125/150
125/'t 50
125/t 50
91
114
109
11
t.l
ea
48
65
75
39
46
62
7000
3t000
8600
30000
5200
7000
31000
31000
31000
31000
31000
31 000
31000
31000
31000
43000
43000
43000
43000
43000
43000
20000
43000
43000
43000
31000
31000
31000
31000
31000
31000
31000
13000
13000
8000
1300,0
2000
520
150
150
1350
2000
2900
4000
8000
16000
20000
32000
46000
520
1
24
26
23
25
33
31
4'l
39
39
34
43
43
50
t
41
48
65
46
11
11
| 150
1 150
1350
6
12
18
'1350
2000
2900
5100
5100
8000
'16000
7
I
150
150
62
39
170
't70
170
6500
1
| 150
150
1350
1
41
27
27
27
27
27
1
31000
31000
31000
31000
20000
20000
20000
20000
20000
31000
31000
16
34
43
6
8
12
100000
150000
11
125/r50
24.O
20000
32000
46000
520
't 'l
23
25
125/150
3t000
65000
'17
24
26
33
27
39oOO
12
25
27
30-
Eooo
16000
1tl
125/150
125i150
23.0
31000
31000
o
16
27
27
20000
109
17
20
3t000
7
18
25'
1700
17000
114
125t150
125t150
12sh 50
23.O
1
2000
2900
4000
87
120
8
520
7
31
1l
ll
17
16
Interupting Curaent
(A rms symmelrical)
31000
31000
31000
31000
1
31
Maximum
lq
4550
6500
7000
8600
150
1 150
o1
125/150
23.0
t8
48
65
39
46
62
25
27
)7
24.O
24.O
24.O
41
17
9v
'1251150
50'
31
18
95/1 10
27
27
27
27
12
18
26
71
12V150
100'
16
23
25
95/110
27
27
27
27
27
27
65'
80'
17
95/1 10
95/1 10
30'
24.0
25
27
34
43
50
68
15
15
15
15.0"
15.0"
15.0-
a
'*
520
'l
1251150
15.0"
15.015.0*
6
t1
95/110
A
L€t-Through
(A2 x s)
7
tq
27
27
27
Maximum
tr,let tQ
(A2 x sl
11
95
120
8
't5
Minamum
8
95,/1 10
20
40
55'C
12
18
15
15
15
15
15
15
15.O
20
25
40rc
95/1 10
9V1 t0
18
12
18
2s"c
95/110
't5
15.0
15.0
8.3
8.3
8.3
8.3
8.3
8.3
8.3
8.3
8.3
8.3
8.3
8.3
atL
(kv)
Interruption Test Results
Continuous Cufient
Ratinqa (AmDs)
2000
2900
5100
520
150
150
1350
1
'I
215000
4550
6500
7000
8600
1 1700
4550
1700
17000
1
20000
39000
65000
100000
150000
215000
4550
6500
7000
8600
1 1700
17000
25000
25000
39000
65000
5200
7000
8000
10000
14000
20000
170
10000
13000
25
24
20
170
27
26
25
2000
14000
13000
For temperatures other than listed, a deration factor of 0.26% per "C can be applied.
Mulli-barrel design
15 kV, 125/l50 kV BlL, 6 lhrough 25 A (single barrel pan numbers FAK44W6 through FAK,14W25) and 30 through 50 A (double
barrel Dart numbers FAK44W30P. FAK44W4O. and FAK44W50) have been lesled and aooroved fo|l7.2 kV aoDlicalion.
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No:
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CP-9415
File
Ref: CaL24O-66
Page: 6 of 16
TEMPERATUBE RISE CHABACTERISTICS & LONG-TERM CURRENT CANRYING CAPACITY
REQUIREMENT
ELF current-limiting fuses are required to carry any system steady state curent up lo the fuse's
continuous current capacity without incurring temperature rises that would be detrimental to any of
the fuse parts. The fuse's continuous current capacity is the maximum current level which the device
can carry, when operating at a specific ambient temperature, without melting open. At this current
level, the luse must not exceed the allowable temperature levels as detailed in standards.
OBJECT'VE
The objectives of these tests are to verify that the temperature rise of the fuse parts do not exceed
the maximum allowable values specified in ANSI C37.40.3, Table 2 and also to determine the
continuous current capacity of each of the ELF tuse ratings.
PROCEDURE
Tesls were run on ELF fuses which were assembled using established methods and procedures.
The samples were mounted in standard interchangeable cutout mountings and tested per the
requirements specified in ANSI C37.41. Current was supplied by a regulated current source.
Temperature levels of the various current carrying parts were recorded throughout the duration ol the
test.
FESUTTS
Temperature rises were below levels allowed in standards. The continuous current capacity for each
respective ELF fuse rating is specified in the performance characteristics table located on page 5 ol
this report.
CONCLUSION
The ELF fuse met the temperature rise requirements of ANSI C37.40, Table 2 and provides longterm conlinuous current ratings specified on page 5 of this report.
E
No:
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No:
NONE
Ref: Cat. 240-66
Page: 7 of 16
File
CP-94'15
TIME CURRENT CHAFACTERISTICS TESTS
REQUIREMENT
Time-current characteristic curves are used primarily lor application selections and system
coordinalion studies. These curves, minimum melt and total clear detail the performance data of a
particular fuse design.
OBJECTIVE
The objective of these tesls were to establish lime-current characteristic curves for the following ELF
fuse ratings:
kV
15.0kV
6,8,
8.3
23.0 kV and 24.0
Note
.:
'12,
18,20,25,30, 40, 50, 65, 80 and 100 A
6,8, 12, 18,20,25,30,40and50A
kV
6, 8, 12, 18, 20, 25' and 30" A
23kV fuse onlv
PROCEDURE
Tesls were run on ELF fuses that were assembled using established methods and procedures.
"Minimum melt" time-current curves were developed using ANSI C37.41, section 12 requirements as
a guideline. Testing was performed with the tuses in standard interchangeable cutout mountings to
simulate actual field application. Testing was performed at room temperature.
'Maximum clear" time current characteristic curves were developed using ANSI C37.41, section 12
requirements as a guideline. For longer times, the fuse's melt time current characteristic, with an
adjustment for production tolerances, were used to determine the fuse's maximum clearing
characteristic. For shorter times, where arcing times are significant, high voltage interrupting lests
were used to determine the fuse's maximum clearing time.
RESULTS
The attached minimum melt TCC curves on pages 11, 13 and 15 and the maximum clear TCC
curves on pages 12, 14 and 16 were developed from the above testing.
CONCLUSION
The minimum melt and maximum clear time-current characteristics are on pages 'l 1-16 of this report.
E
No:
CP
No:
File Ref: Cat.240-66
NONE
Page: 8 of 16
CP-9415
MECHANICALTESTS
REOUIREMENT
The ELF fuse is required to withstand 200 open/close operations per ANSI/IEEE C37.41.
OBJECTIVE
The objective of this test is to verify the mechanical performance of the ELF fuse.
PBOCEDURE
Production fuses were assembled using established methods and procedures. Testing was
conducted per ANSI/IEEE C37 .41. The tests were run by first closing the ELF fuse into an
interchangeable cutout mounting and then opening the ELF luse from the same mounting. This
was done the required number of times using normal operating procedures.
RESULTS
The ELF fuses passed all mechanical tests with no evidence of damage.
CONCLUSION
The ELF fuse meets the mechanical requirements as specified in ANSI/IEEE C37.41.
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CPNo:
Ref: Cat. 240-66
Page: 9 of 16
CP-9415
MAXIMUM PEAK ARC VOLTAGE
for
8.3kV rated fuses 6 amps and above
15.0kV rated fuses 6 amps and above
23.0 & 24.0 rated fuses 6 amps and above
100
'r7o
q)
o)
960
o
()-^
:5U
J
(g
8+o
E
=
.E so
x
(U
20
10
0
5
10
15
20
Circuit Voltage (kV)
30
35
E
No:
CPNo:
NONE
File
Ref: Cat.240-66
10 of 16
CP-9415
MAXIMUM LET.THROUGH GURRENT
for
ELF Fuse
.! ,. ,t
.oJ .or .G.ra.o'.6.o.I
$F
of-
l
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AVA ILABLE CURRENT
.+
IN
.6 .7,3.9
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(RMS Symme
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1-5tft
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E
No:
CP
No:
Ref: Cat.240-66
Page: 11 of 16
NONE
File
CP-9415
MINIMUM MELT
Time Current Characteristic Gurves for 8.3kV ELF Fuse
a
!
| t I r.rr0
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s € . oD.o!
i I qtEp
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9,
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E
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CP
No:
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File
Ref: Cat.24O-66
Page: 12 of
CP-9415
16
MAXIMUM CLEAR
Time Gurrent Gharacteristic Curves for 8.3kV ELF Fuse
g
E HgFEgg
';
'
r.rrr.ra
q.rmo|I tN
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E
No:
CP
No:
File
NONE
Ref: Cat. 240-66
Page: 13 of 16
CP-9415
MINIMUTU MELT
Time Gurrent Gharacteristic Curves for 15.0kV ELF Fuse
CLFFENT
,
e o r.r.rt
q.FF€r{T
!N {TP€A€S
I
lN Atf€FES
E
I t !!t!tl
I
g
gt
: t r ttntl
E
No:
CP
No:
Ref: Cat.240-66
Page: 14 of 16
NONE
File
CP-94'15
MAXIMUM CLEAR
Time Current Gharacteristic Curves for 15.0kV ELF Fuse
dIRR€NT
r
$ { e&no,g
IN
ATP€F€S
9
t
epElE
E
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t
s
;
CITRENT
II
t I trtttrl
^|.FE
ES
| | tttiltl
E
No:
CP
No:
NONE
File
Ref: Cat.24046
Page:15of16
CP-9415
MINIMUM MELT
Time Gurrent Gharacteristic Gurves for 23.0kV ELF Fuse
CLFSENT
s
IN
orro9
ATPEFES
F I lt I Ettsg
nr
tggtEgE
r
rFsffs8
9
6
s
3
! . r.n.'t
C!AEMi
n t I t!E!tt
TN
^TftF€s
E
No:
CP
No:
Ref: Cat.24O-66
Page: 16 of 16
File
NONE
CP-9415
MAXIMUM CLEAR
Time Current Characteristic Curves for 23.0kV ELF Fuse
!
qJfiR€NI IN
'
o , . ForE
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^If,ERgS
E s efigtgg!
6
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IN
AIPERES
Hr
9Esffsg
co#rnpo*"rsystems
Ouality lrom Cooper Industdes
P.O. Box 1640, Waukesha, W|53187
@
Prinled on Recycted Papel
MI