ETC EC-600

BRITISH STYLE–
SEMICONDUCTOR PROTECTION FUSES
The Edison British Style semiconductor protection fuses
include a 660VAC line utilizing new filler technology. These
new fuses have greatly reduced peak let-through current
and energy under fault conditions and hence extend fuse
protection capability. They can be recognized by the letter
“F” in their catalog number. Application and technical data
for these 660VAC “F” fuses and the original line of 240VAC
British “T” type fuses are presented on the following pages.
“F” Range
This is a superior design of fuses in the same physical
package as the “T” range.
Equivalent Ratings
This table shows the suggested equivalent ratings to
replace a “T” with an “F”.
Because of the new design technology it has been possible
to obtain the equivalent energy let-through I2t with a higher
amp rated fuse hence reducing the possibility of premature
operation.
This table gives a range of suggested acceptable new “F”
type to replace the earlier “T” type.
To upgrade your protection to the new “F” series select a
fuse rating within the range shown that suits your circuit
inrush requirements. You will still have the same or better
protection of your semiconductor devices.
It should be remembered that to protect devices we must
consider the energy let-through of the selected fuse. The
label amp rating will relate to the full load current and the
circuit inrush amps.
The suggested replacements are based on:
a. Similar surge withstand to normal circuit overloads.
b. Lower total I2t let-through.
This gives enhanced reliability due to the use of a higher
current rated fuse which avoids nuisance operation and still
gives improved short-circuit protection.
84
Replacement Table — “T” to “F” (660V)
Earlier
“T” Range
6CT
10CT
12CT
16CT
20CT
25ET
32ET
35ET
40ET
45ET
56ET
63ET
–
–
80ET
65EET
75EET
90EET
110EET
–
140EET
–
160EET
–
160MT
180MT
200MT
–
250MT
280MT
315MT
355MT
180MMT
200MMT
225MMT
280MMT
315MMT
355MMT
–
–
400MMT
450MMT
500MMT
560MMT
630MMT
710MMT
New “F” Range
Lowest
Rating
6FC
10FC
12FC
16FC
20FC
–
35FE
35FE
40FE
45FE
63FE
63FE
–
–
80FE
–
–
–
–
–
140FEE
–
160FEE
–
200FM
225FM
250FM
280FM
315FM
350FM
350FM
350MT
180FM
200FM
225FM
280FM
315FM
350FM
–
–
500FMM
550FMM
630FMM
700FMM
700FMM
700FMM
Highest
Rating
6FC
10FC
12FC
16FC
20FC
–
35FE
40FE
45FE
50FE
63FE
71FE
80FE
90FE
100FE
–
–
100FEE
120FEE
140FEE
160FEE
180FEE
200FEE
180FM
200FM
225FM
250FM
280FM
315FM
350FM
350FM
350FM
180FM
200FM
225FM
280FM
315FM
350FM
400FMM
450FMM
500FMM
550FMM
630FMM
700FMM
700FMM
700FMM
BRITISH STYLE–
SEMICONDUCTOR PROTECTION FUSES
660 VOLT (AC) RANGE
Pre-arc
I2t (A2SEC)
Clearing
At 415V
6FC
10FC
12FC
16FC
20FC
1.5
6
9
13
30
6
18
26
44
100
8
30
45
65
160
3
3
3
6
6
660
20
20
20
20
20
ET
25ET
32ET
25
32
150
190
250
350
7
11
450
10
10
0.420
0.420
FE
35FE
40FE
45FE
50FE
63FE
71FE
80FE
90FE
100FE
33
52
76
103
135
210
250
360
470
130
180
270
380
480
600
900
1300
1800
200
300
450
600
750
950
1500
2100
2800
9
9
11
11
12
17
20
20
23
450
10
10
10
10
10
10
10
10
10
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
0.420
65EET
75EET
90EET
210
420
490
2000
2600
3000
3000
4400
4500
20
20
19
450
5
5
5
0.450
0.450
0.450
100FEE
120FEE
140FEE
160FEE
180FEE
200FEE
400
540
850
1000
1400
1900
1600
1900
2500
3700
5300
7100
2400
3100
3800
5700
8400
11400
24
32
36
46
46
52
5
5
5
5
5
5
0.450
0.450
0.450
0.450
0.450
0.450
180FM
200FM
225FM
250FM
280FM
315FM
350FM
1400
2600
3700
5200
7000
10000
15000
7500
10500
14500
20500
30500
40000
60000
13500
18500
26500
37500
55000
77000
105000
40
40
44
48
48
55
55
1
1
1
0.240
0.240
0.240
1
1
1
0.240
0.240
0.240
400FMM
450FMM
500FMM
550FMM
630FMM
700FMM
10000
15000
20000
30000
45000
60000
40000
60000
82000
120000
180000
245000
72500
105000
15000
215000
310000
420000
85
90
100
100
100
120
1
1
1
1
1
1
0.450
0.450
0.450
0.450
0.450
0.450
Type
Outline
FC
2.53"
64.3mm
2.50"
63.5mm
EET
FEE
2.76"
70.0mm
FM
3.15"-3.35"
80-85mm
FMM
Part
Number
Clearing
At 660V
Watts
Loss
Carton
Weight
(Kg)
D.C.
Volts
Carton
Qty.
0.160
0.160
0.160
0.160
0.160
450
450
450
3.15"-3.35"
80-85mm
• Interrupting rating 200kA RMS Symmetrical.
• Watts loss provided at rated current.
• These fuses meet the requirements of BS 88 Part 4 and IEC 269-4 • Consult Edison for UL Recognition information
85
BRITISH STYLE–
SEMICONDUCTOR PROTECTION FUSES
240 VOLT (AC) RANGE
Type
Outline
LCT
1.50"
38.0mm
LET
1.65"
41.8mm
LMT
2.32"
59.0mm
LMMT
2.32"
59.0mm
• Interrupting rating 200kA RMS Symmetrical.
• Watts loss provided at rated current.
• All fuses above have been tested to 318VAC.
• These fuses meet the requirements of BS 88 Part 4 and IEC 269-4
• UL Recognition on LET and LMT. Others pending – Consult Edison.
86
Pre-arc
I2t (A2SEC)
Clearing
At 120V
6LCT
10LCT
12LCT
16LCT
20LCT
2
3.8
7
20
25
6
12
22
50
80
9
22
32
100
160
1.0
2.5
2.5
2.5
4.0
7LET
10LET
12LET
16LET
25LET
32LET
35LET
50LET
63LET
80LET
100LET
125LET
160LET
180LET
1.7
3.8
7
15
18
32
50
100
180
300
600
600
1100
1600
10
23
42
70
120
200
320
500
1100
1900
3800
3800
7000
12000
17
35
58
140
250
450
600
1400
2200
3800
7500
7500
18000
29000
1.5
1.8
2
2.5
4.0
5.0
5.0
7.0
9.0
10.0
10.0
10.0
20.0
21.0
160LMT
200LMT
250LMT
315LMT
355LMT
400LMT
450LMT
1100
1500
3200
6000
8000
14000
18000
7000
10000
20000
35000
50000
70000
100000
16000
20000
40000
75000
100000
160000
220000
17.0
28.0
28.0
35.0
35.0
40.0
42.0
400LMMT
400LMMT
400LMMT
400LMMT
400LMMT
400LMMT
6000
14000
24000
32000
52000
75000
35000
80000
150000
200000
300000
400000
80000
170000
300000
460000
600000
800000
60.0
64.0
75.0
77.0
82.0
97.0
Part
Number
Clearing
At 240V
Watts
Loss
D.C.
Volts
Carton
Qty.
Carton
Weight
(Kg)
200
20
20
20
20
20
0.110
0.110
0.110
0.110
0.110
10
10
10
10
10
10
10
10
10
10
10
10
10
10
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
0.310
1
1
1
1
1
1
1
0.180
0.180
0.180
0.180
0.180
0.180
0.180
1
1
1
1
1
1
0.370
0.370
0.370
0.370
0.370
0.370
140
160
160
BRITISH STYLE–
SEMICONDUCTOR PROTECTION FUSES
DIMENSIONS in Millimeters
Type
FC
LCT
FE & ET
LET
FEE & EET
FM
LMT
FMM
LMMT
A
74.6
47
77
56
94
113
84
113
84
B
64.3
38
63.5
41.8
70
80-85
59
80-85
59
FC & LCT
FM & LMT
C
54.8
28
48
26.2
46
50
31
50
31
D
8.7
8.4
17.7
17.7
37
38
38.1
83
83
FE, ET & LET
E
8.7
8.7
19.1
19.1
19
41.5
41
38
38
F
6.4
6.4
12.7
12.7
31.8
25.4
25.4
25.4
25.4
G
4
4
7.1
7.1
8.7
10.3
10.3
10.3
10.3
H
5.5
5.5
9.7
9.7
11.9
14
13.5
14
13.5
FEE & EET
FMM & LMMT
87
400 450
500
550
630
700
100
120
140
160
180
200
BRITISH STYLE–
SEMICONDUCTOR PROTECTION FUSES
AMPERE
RATING
30
660V Time-Current Curves
10
TIME IN SECONDS
FEE (100-200A)
FMM (400-700A)
1
.1
.01
180
200 225
250 280
315
350
35
40
45
50
63
80 71
100 90
6
CURRENT IN AMPERES
10
12
16
20
10,000
1000
100
.004
AMPERE
RATING
30
10
660V Time-Current Curves
FC (6-20A)
FE (35-100A)
FM (180-350A)
1
.1
01
CURRENT IN AMPERES
88
60000
1000
100
10
04
450
315
355
400
230
160
200
BRITISH STYLE–
SEMICONDUCTOR PROTECTION FUSES
AMPERE
RATING
240V Time-Current Curves
30
LMT (160-450A)
TIME IN SECONDS
10
1
.1
.01
CURRENT IN AMPERES
400
500
630
710
800
900
5
10
12
15
20
25
32
35
50
63
80 100
125
160
180
4000
1000
200
.004
AMPERE
RATING
30
.1
.01
10,000
1000
.004
100
LCT (6-20A)
LET (25-180A)
LMMT (400-900A)
1
10
240V Time-Current Curves
TIME IN SECONDS
10
CURRENT IN AMPERES
89
BRITISH STYLE–
INDICATORS AND ACCESSORIES
Indicator System
Trip-Indicators
Trip-indicators are available for use in parallel with the main
fuse. They can either be attached to the associated fuse or
mounted separately in panel mounted fuse clips, reference
CL1. A push-on adapter and microswitch attachment is
available for use with the trip indicator to give the facility of
remote indication, reference MAI.
Fuse ratings of 20A and below cannot usually accommodate a trip-indicator.
When a trip-indicator is to be attached to the main fuse an
accessory pack comprising a pair of mounting clips and an
appropriate trip indicator would be required. The clips are
snapped onto the fuse end caps and the indicator is
pressed into clips as shown.
Electrical Specifications
Type
Maximum RMS Voltage
Maximum Peak Voltage
Maximum DC Voltage
Cold Resistance (ohms)
Maximum permissible steady-state current
Interrupting Capacity (RMS Symm.)
Pre-Arcing I2t (A2S)
Total I2t (max volts) (A2S)
B
21
C
6
TI500
500
700
130
0.3
1.5A
100,000
23
46
TI700
700
1000
350
0.45
1.5A
100,000
23
46
A
0.8
E
D
F
6.8
Dimensions in mm
Trip-Indicator Data
Fuse Indicator Kits
Kit. Ref.
EC-250
MC250
EC-600
MC600
MC700
Details
Fuse Mount
Indicator Kits
(Inc. one indicator
and two clips)
RMS
Volts
250
250
660
660
700
For use
with Fuse Ref.
LET
LMT & LMMT
FE, FEE, ET, & EET
FM & FMM
MT & MMT
Ref.
TI250
TI500
TI600
TI700
TI1100
TI1500
TI2000
TI2500
Microswitch Adapter
MAI
NO
NC
Edison is offering a microswitch, complete with adapter for
securing the indicator. The microswitch is provided with
double pole, single throw contacts, having both a normally
open and a normally closed position. A special material has
been employed in the construction of the adapter to provide
reliable operation in the range of temperatures associated
with standard operating conditions and during fuse operation.
NC
NO
Terminal Arrangement
Microswitch and Adapter Type MAI
Current Rating:
AC 50/60Hz resistive load @ 250V RMS
AC 50/60Hz resistive load @ 127V RMS
DC, resistive load @ 110V DC
DC, resistive load @ 30V DC
Maximum Working Voltage:
Contact-to-contact (RMS)
Contact-to-contact (RMS)
Maximum DC Volts:
4A
6A
0.7A DC
2A DC
1000V
1500V
110V DC
Dimensions in mm
90
Dim. “A” (mm)
37.6
47.5
55.7
61.8
98.4
120.6
147.5
198.3
RMS Volts
250
500
600
700
1100
1500
2000
2500
6.35