ETC 20ET

Bussmann
®
British Style BS 88
6-700A
690V
Type
Rated
Current
RMS-Amps
CT
ET
FE
EET
FEE
FM
FMM
MT†
MMT†
6
10
12
16
20
25
32
35
40
45
56
63
80
35
40
45
50
63
71
80
90
100
90
110
140
160
100
120
140
160
180
200
180
200
225
250
280
315
350
400
450
500
550
630
700
160
180
200
250
280
315
355
180
200
225
280
315
355
400
450
500
560
630
710
®
Electrical Characteristics
I2t (A2S)
Clearing
Clearing
Pre-arc
at 415V
at 660V
1.8
7
10
16
32
25
32
52
103
103
135
171
360
33
52
76
103
135
210
250
360
470
490
600
1050
1500
400
540
850
1000
1400
1900
1400
2600
3700
5200
7000
10000
15000
10000
15000
20000
30000
45000
60000
2400
3800
6000
11500
16500
19000
22000
1650
2200
3700
6600
8600
13500
21000
30000
42000
60000
68500
78000
8.5
30
40
66
150
150
190
310
600
680
950
1200
2500
130
180
270
380
480
600
900
1300
1800
3000
4000
7000
10000
1600
1900
2500
3700
5300
7100
7500
10500
14500
20500
30500
40000
60000
40000
60000
82000
120000
180000
245000
15000
25000
40000
80000
100000
125000
160000
12000
16000
26000
47000
62000
97000
150000
220000
300000
430000
500000
600000
12
48
65
110
220
250
350
500
900
1100
1500
2000
4000
200
300
450
600
750
950
1500
2100
2800
4500
6500
12000
17000
2400
3100
3800
5700
8400
11400
13500
18500
26500
37500
55000
77000
105000
72500
105000
150000
215000
310000
420000
25000
38000
58000
110000
150000
180000
200000
18000
23000
40000
70000
91000
140000
220000
320000
450000
640000
720000
850000
Ordering Information
Watts
Loss
2
3
3
7
7
7
11
11
9
11
14
16
18
9
9
11
11
12
17
20
20
23
19
27
35
39
24
32
36
46
46
52
40
40
44
48
48
55
55
85
90
100
100
100
120
26
26
27
32
35
42
51
42
42
42
47
51
54
60
57
64
64
86
105
Part
Number
6CT
10CT
12CT
16CT
20CT
25ET
32ET
35ET
40ET
45ET
56ET
63ET
80ET
35FE
40FE
45FE
50FE
63FE
71FE
80FE
90FE
100FE
90EET
110EET
140EET
160EET
100FEE
120FEE
140FEE
160FEE
180FEE
200FEE
180FM
200FM
225FM
250FM
280FM
315FM
350FM
400FMM
450FMM
500FMM
550FMM
630FMM
700FMM
160MT
180MT
200MT
250MT
280MT
315MT
355MT
180MMT
200MMT
225MMT
280MMT
315MMT
355MMT
400MMT
450MMT
500MMT
560MMT
630MMT
710MMT
Dimensions
Curves
Carton
Weight
(kg)
Figure
Number
See Page
or
(BIF #)
20
0.160
Fig. 1
page 75
(35785312)
10
0.420
Fig. 2
page 75
(35785312)
10
0.420
Fig. 2
page 76
(35785314)
5
0.450
Fig. 3
page 75
(35785313)
5
0.450
Fig. 3
page 77
(35785292)
1
0.240
Fig. 4
page 76
(35785314)
1
0.450
Fig. 5
page 77
(35785292)
1
0.260
Fig. 4
page 75
(35785313)
1
.0470
Fig. 5
page 76
(35785311)
Carton
Qty.
n Interrupting rating 200kA RMS Symmetrical.
n 450 Vdc rating
n Watts loss provided at rated current.
n Note: FC, 8ET, 12ET, 15ET, 20ET, 65EET and 75EET are available for replacement purposes on existing equipment.
n See accessories on page 72.
†350 Vdc (IEC) rating. Consult Bussmann for U.L. Recognition status.
rev. 6/29/98
1 kg = 2.2 lbs
1 lb = 0.45 kg
Form No.
Page 1 of 2
BIF Doc #720024
Bussmann
®
British Style BS 88
6-700A
690V
®
Electrical Characteristics
Total Clearing I2t
The total clearing I2t at rated voltage and
at power factor of 15% are given in the
electrical characteristics. For other voltages, the clearing I2t is found by multiplying by correction factor, K , given as
a function of applied working voltage,
E g , (RMS).
1.6
Arc Voltage
This curve gives the peak arc voltage,
U L , which may appear across the fuse
during its operation as a function of the
applied working voltage, E g , (RMS) at a
power factor of 15%.
K
1500
1.4
Power Losses
Watts loss at rated current is given in
the electrical characteristics. The curve
allows the calculation of the power
losses at load currents lower than the
rated current . The correction factor, K p ,
is given as a function of the RMS load
current, Ib , in % of the rated current .
1.0 Kp
0.8
UL
0.6
0.5
1)
1.2
1.0
0.4
1000
2)
0.8
0.3
0.6
0.2
500
0.4
1)
0.2
2)
Eg
Eg
200
300
400
500
200
600 660
1) CT, FE, EET, FEE
2) ET, FM, FMM
400
Ib
0.1
30 40 50
600 660
60
70
80 90 100%
1) CT
2) ET, FE, EET, FEE, FM, FMM
Dimensions
Fig. 1: CT
Fig. 2: ET, FE
4
Fig. 3: EET, FEE
8.7
7.1
5.5
54.8 64.3 74.6
46 70 94
48 63.5 77
11.9
9.7
12.7
17.1
6.4
8.7
8.7
Fig. 4: FM, MT
31.8
19
25.4
19.1
25.4
50
50
A
37
Fig. 5: FMM, MMT
A
113
14
113
Type
FM
FMM
MT
MMT
“A”
Dimension
80-85
80-85
85
85
10.3
13.5
10.3
83
41
38.1
Dimensions in mm.
1mm = 0.0394∑
1∑ = 25.4mm
38
This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right,
without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without
notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
rev. 6/29/98
Form No.
Page 2 of 2
BIF Doc #720024