Cooper Bussmann British Style BS 88 Data Sheet
Form No.
Page 1 of 2
BIF Doc #720024
Bussmann
®
®
British Style BS 88
690V 6-700A
Electrical Characteristics Ordering Information Dimensions Curves
Rated
I2t (A2S)
Carton
Current Clearing Clearing Watts Part Carton Weight Figure
Type RMS-Amps Pre-arc at 415V at 660V Loss Number Qty. (kg) Number BIF #
6 1.8 8.5 12 2 6CT
10 7 30 48 3 10CT
CT 12 10 40 65 3 12CT 20 0.160 Fig. 1
16 16 66 110 7 16CT
20 32 150 220 7 20CT
25 25 150 250 7 25ET
32 32 190 350 11 32ET 35785312
35 52 310 500 11 35ET
ET
40 103 600 900 9 40ET
10 0.420 Fig. 2
45 103 680 1100 11 45ET
56 135 950 1500 14 56ET
63 171 1200 2000 16 63ET
80 360 2500 4000 18 80ET
35 33 130 200 9 35FE
40 52 180 300 9 40FE
45 76 270 450 11 45FE
50 103 380 600 11 50FE
FE 63 135 480 750 12 63FE 10 0.420 Fig. 2 35785314
71 210 600 950 17 71FE
80 250 900 1500 20 80FE
90 360 1300 2100 20 90FE
100 470 1800 2800 23 100FE
90 490 3000 4500 19 90EET
EET
110 600 4000 6500 27 110EET
5 0.450 Fig. 3 35785313
140 1050 7000 12000 35 140EET
160 1500 10000 17000 39 160EET
100 400 1600 2400 24 100FEE
120 540 1900 3100 32 120FEE
FEE
140 850 2500 3800 36 140FEE
5 0.450 Fig. 3 35785292
160 1000 3700 5700 46 160FEE
180 1400 5300 8400 46 180FEE
200 1900 7100 11400 52 200FEE
180 1400 7500 13500 40 180FM
200 2600 10500 18500 40 200FM
225 3700 14500 26500 44 225FM
FM 250 5200 20500 37500 48 250FM 1 0.240 Fig. 4 35785314
280 7000 30500 55000 48 280FM
315 10000 40000 77000 55 315FM
350 15000 60000 105000 55 350FM
400 10000 40000 72500 85 400FMM
450 15000 60000 105000 90 450FMM
500 20000 82000 150000 100 500FMM
1 0.450 Fig. 5FMM
550 30000 120000 215000 100 550FMM 35785292
630 45000 180000 310000 100 630FMM
700 60000 245000 420000 120 700FMM
160 2400 15000 25000 26 160MT
180 3800 25000 38000 26 180MT
200 6000 40000 58000 27 200MT
MT†† 250 11500 80000 110000 32 250MT 1 0.260 Fig. 4 35785313
280 16500 100000 150000 35 280MT
315 19000 125000 180000 42 315MT
355 22000 160000 200000 51 355MT
180 1650 12000 18000 42 180MMT
200 2200 16000 23000 42 200MMT
225 3700 26000 40000 42 225MMT
280 6600 47000 70000 47 280MMT
315 8600 62000 91000 51 315MMT
MMT††
355 13500 97000 140000 54 355MMT
1 .0470 Fig. 5 35785311
400 21000 150000 220000 60 400MMT
450 30000 220000 320000 57 450MMT
500 42000 300000 450000 64 500MMT
560 60000 430000 640000 64 560MMT
630 68500 500000 720000 86 630MMT
710 78000 600000 850000 105 710MMT
† U.L Recognition on CT, ET, FE, EET, FEE, FM, & FMM.
1 kg = 2.2 lbs 1 lb = 0.45 kg
†† 350 Vdc (IEC) rating. Consult Bussmann for U.L. Recognition status.
n Interrupting rating 200kA RMS Symmetrical.
n (500 Vdc/Interrupting rating 50ka) U.L. Recognition for CT, ET, FE, EET, FEE, FM & FMM.
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.
7-18-01
SB01191
†
Form No.
Page 2 of 2
BIF Doc #720024
Bussmann
®
The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled.
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.
British Style BS 88
690V 6-700A
®
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 I
2
t is found by multiplying by correction factor, K, given as
a function of applied working voltage,
E
g
, (RMS).
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%.
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, I
b
, in % of the rated current .
Electrical Characteristics
Dimensions
200 300 400 500 600
660
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1)
2)
E
g
K
1500
1000
500
200
400 600 660
E
g
U
L
1)
2)
Kp
1.0
0.8
0.4
0.5
0.6
0.3
0.2
0.1
30 40 50 60
70
80 90 100%
I
b
7763.5
48
17.1
19.1
12.7
7.1
9.7
947046
37
19
31.8
8.7
11.9
113
A50
41
38.1
25.4
10.3
13.5
113A50
83
38
25.4
10.3
14
Fig. 2: ET, FE
74.664.354.8
6.4
8.7
8.7
4
5.5
Fig. 1: CT Fig. 3: EET, FEE
Fig. 4: FM, MT
Fig. 5: FMM, MMT
Dimensions in mm.
1mm = 0.0394∑ 1∑ = 25.4mm
1) CT, ET, EET, FE, FEE, MT, MMT
2) FM, FMM
1) CT
2) ET, FE, EET, FEE, FM, FMM
“A”
Type Dimension
FM 80-85
FMM 80-85
MT 85
MMT 85
7-18-01
SB01191
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