Transcript
High speed fuses
6
British BS 88
Introduction General information
British BS 88 contents Fuse Amp volts range 240 6-900 690 6-710
Page 6-95 6-98
Accessories Indicator system and fuse bases
6-102
Designed and tested to: • BS 88: Part 4 • IEC 269: Part 4 • UL Recognized
Eaton offers the industry’s widest range of British style semiconductor fuses and accessories.
Eaton’s Bussmann series British style products use innovative arc quenching techniques and high grade materials to provide: • Minimal energy let-through (I2t) • Excellent DC performance • Good surge withstand profile
British BS 88 fuse ranges Amps 6-900 6-710
Vac 240 690
Vdc 150 500
British style fuses are typically found in equipment manufactured in the United Kingdom or British Commonwealth countries. However, North American manufacturers have begun to specify British style fuses — particularly in UPS applications at 240V or less — to take advantage of their size, performance and cost benefits. Voltage rating
All Bussmann series British style fuses are tested to IEC 269: Part 4. This standard requires a test voltage which is 5% higher than the rated voltage. In North America, fuses are required to clear only their rated voltage. Accessories
Trip-indicator fuses are available for use in parallel with the main fuse. Indicator fuses can be attached to the associated fuselink, or mounted separately in panel-mounted fuseclips. In addition, a push-on adapter and microswitch attachment are available, to provide remote indication. Fuse blocks are also available for most applications.
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BUSSMANN SERIES FULL LINE CATALOG
1007—July 2015
Eaton.com/bussmannseries
High speed fuses
6
British BS 88
LCT, LET, LMT, LMMT – 240V: 6-900A
Arc voltage
Specifications Description: BS 88 style stud-mount fuses. Dimensions: See dimensions illustrations. Ratings: Volts: — 240Vac/150Vdc Amps: — 6-900A IR: — 200kA RMS Sym. Agency information: CE, Designed and tested to: BS 88 Part 4, IEC 269 Part 4, UL Recognized. All fuses above have been tested at 318Vac. Consult Eaton for specific UL Recognition status. 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, Eg, (rms).
1.0 0.8 0.6
1)
0.4 0.2
50
Catalog numbers
2)
100
150
Eg
200
250
1) LCT 2) LET, LMT, LMMT
7.1
26.2 41.8 56 9.7 17.7
19.1
Fig. 3: LMT
1mm = 0.0394” / 1” = 25.4mm
Fig. 4: LMMT 25.4
25.4
31
13.5
59
31 59 84
84
13.5
10.3
10.3
41
83
38.1
Indicator (Optional)
2)
250 100
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, Kp, is given as a function of the RMS load current, Ib, in % of the rated current.
1)
500
1.0 Kp 0.8
200
1) LCT 2) LET, LMT, LMMT
300
Eg
0.6 0.5 0.4
0.3 0.2 0.1
30 40 50
60
70
Ib
80 90 100%
Electrical characteristics
12.7 8.4
UL
38
Catalog numbers 6LCT 10LCT 12LCT 16LCT 20LCT 25LET 32LET 35LET 50LET 63LET 80LET 100LET 125LET 160LET 180LETa 160LMT 200LMT 250LMT 315LMT 355LMT 400LMT 450LMT 400LMMT 500LMMT 630LMMT 710LMMT 800LMMT 900LMMT
Type LCT
LET
LMT
LMMT
Rated current RMS-amps 6 10 12 16 20 25 32 35 50 63 80 100 125 160 180 160 200 250 315 355 400 450 400 500 630 710 800 900
Pre-arc 2 3.8 7 20 25 18 32 50 100 180 300 600 600 1100 1600 1100 1500 3200 6000 8000 14000 18000 6000 14000 24000 32000 52000 75000
I2t (A2 sec) Clearing at 120V 6 12 22 50 80 120 200 320 500 1100 1900 3800 3800 7000 12000 7000 10000 20000 35000 50000 70000 100000 35000 80000 150000 200000 300000 400000
Clearing at 240V 9 22 32 100 160 250 450 600 1400 2200 3800 7500 7500 16000 29000 16000 20000 40000 75000 100000 160000 220000 80000 170000 300000 460000 600000 800000
Watts loss 1.0 2.5 2.5 2.5 4.0 4.0 5.0 5.0 7.0 9.0 10.0 10.0 16.0 20.0 21.0 17.0 28.0 28.0 35.0 35.0 40.0 42.0 60.0 64.0 75.0 77.0 82.0 97.0
• Watts loss provided at rated current. • Note: 7LET, 10LET, 12LET and 16LET are available for replacement purposes on existing equipment. • See accessories on page 6-102.
Features and benefits • Excellent cycling capability • Excellent DC performance • Low arc voltage and low energy let-through (I2t)
• • • •
Typical applications DC common bus AC and DC drives Power converters/rectifiers Reduced voltage starters
Data Sheet: 720004 BUSSMANN SERIES FULL LINE CATALOG
1007—July 2015
Eaton.com/bussmannseries
6-95
High speed fuses
8.7
1.2
K
4
28 38 47
6.4
1.4
Fig. 2: LET
Dimensions - mm Fig. 1: LCT 5.5
1.6
This curve gives the peak arc voltage, UL, which may appear across the fuse during its operation as a function of theapplied working voltage, Eg, (rms) at a power factor of 15%.
750
High speed fuses
6
British BS 88
LCT 6-20A: 240V
LET 25-180A: 240V
Time-current curve
Time-current curve 104 6 4
104 6 4
2
2
103
103
6 4
6 4 2 6 4 2
102
2
101
6 4 2
100
6 4 2
101
6 4
25LET 32LET 35LET 50LET 63LET
2
100
6 4 2
10–1
10–1
6 4
6 4 2
2
10–2
10–2
6 4
6 4
2
2
10–3
10–3 6 4
6 4 2
2
10–4
80LET 100LET 125LET 160LET 180LETa
6 4
Virtual Pre-Arcing Time In Seconds
Virtual Pre-Arcing Time In Seconds
2
6LCT 10LCT 12LCT 16LCT 20LCT
102
2
4
6
8
2 4 6 8 101 102 Prospective Current In Amps RMS
2
4
6
8
10–4
103
Data Sheet: 35785296
2
101
4
6
8 102
Data Sheet: 35785293
Peak let-through curve 2 105
900LMMT 800LMMT 710LMMT 630LMMT 450LMT 400 & 500LMMT 355LMT 315LMT 250LMT
6 4 2
104
180LET 200LMT 160LET & LMT 125 & 100LET 80LET
6
Peak Let-Through Current
4 2
103
6 4
63LET 50LET 35LET 32LET 25LET
2 10
2
20LCT 16LCT 12LCT 10LCT 6LCT
6 4 2
101
6-96
101
2
SYMMETRICAL FAULT FULLY ASYMMETRICAL FAULT 4
6
102
BUSSMANN SERIES FULL LINE CATALOG
2
4
6
103
2
4
6
104
Prospective Short-Circuit Current Symmetrical RMS
1007—July 2015
2
2
4
Prospective Current In Amps RMS
4
6
105
Eaton.com/bussmannseries
6
8 103
High speed fuses
6
British BS 88
LMT 160-450A: 240V
LMMT 400-900A: 240V
Time-current curve
Time-current curve
104
104 6 4
6 4 2
2
103
103
6 4
6 4
2
101 6 4
6 4
2 100 6 4 2 10–1 6 4
2 101 6 4 2 100 6 4 2 10–1
6 4
2
2
10–2 6 4
10–2 6 4
2
2
10–3
10–3 6 4
6 4 2
2 102
2
4
6
8 103
2
4
6
Prospective Current In Amps RMS
8 104
10–4
Data Sheet: 35785294
2
102
4
6
8 103
2
4
Prospective Current In Amps RMS
6
8 104
Data Sheet: 35785295 High speed fuses
Peak let-through curve 2 105
900LMMT 800LMMT 710LMMT 630LMMT 450LMT 400 & 500LMMT 355LMT 315LMT 250LMT
6 4 2
10
Peak Let-Through Current
10–4
400LMMT 500LMMT 630LMMT 710LMMT 800LMMT 900LMMT
102
Virtual Pre-Arcing Time In Seconds
2 Virtual Pre-Arcing Time In Seconds
2
160LMT 200LMT 250LMT 315LMT 355LMT 400LMT 450LMT
102 6 4
4
180LET 200LMT 160LET & LMT 125 & 100LET 80LET
6 4 2
103
6 4
63LET 50LET 35LET 32LET 25LET
2 102
20LCT 16LCT 12LCT 10LCT 6LCT
6 4 2
101
10
1
2
SYMMETRICAL FAULT FULLY ASYMMETRICAL FAULT 4
6
102
2
4
6
103
2
4
6
104
Prospective Short-Circuit Current Symmetrical RMS
BUSSMANN SERIES FULL LINE CATALOG
2
4
6
105
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Eaton.com/bussmannseries
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High speed fuses
6
British BS 88
CT, ET, FE, EET, FEE, FM, FMM, MT, MMT – 690V: 6-710A
Arc voltage
This curve gives the peak arc voltage, UL, which may appear across the fuse during its operation as a function of the applied working voltage, Eg, (rms) at a power factor of 15%.
Specifications Description: BS 88 style stud-mount fuses. Dimensions: See dimensions illustrations. Ratings: Volts: — 690Vac/500Vdc Amps: — 6-710A IR: — 200kA RMS Sym. Agency information: CE, Designed and tested to: BS 88 Part 4, IEC 269 Part 4, UL Recognized. MT and MMT — 350Vdc (IEC) rating. Consult Eaton for UL Recognition status. Electrical characteristics
1.6
Total clearing I2t
1.4
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, Eg, (rms).
Dimensions - mm Fig. 1: CT 5.5
4
8.7
• • • •
0.8 0.6
0.2
1)
2) Eg
200
300
400
500
600 690
• • • •
1) CT, ET, EET, FE, FEE, MT, MMT 2) FM, FMM
7.1
12.7 17.1
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, Kp, is given as a function of the RMS load current, Ib, in % of the rated current.
1) CT 2) ET, FE, EET, FEE, FM, FMM
0.6 0.5 0.4 0.3 0.2 0.1
30 40 50
60
Ib
80 90 100%
70
Fig. 5: FMM, MMT
25.4
50
25.4
A
50
113
A
14 31.8 37
10.3 10.3
19
41 38.1
Data Sheet: 720024 BUSSMANN SERIES FULL LINE CATALOG
1.0 Kp 0.8
Eg
600 660
400
13.5
1mm = 0.0394” / 1” = 25.4mm
6-98
200
Fig. 4: FM, MT
46 70 94
19.1
500
Typical applications DC common bus DC drives Power converters/rectifiers Reduced voltage starters
8.7
11.9
2)
Features and benefits Excellent cycling capability Excellent DC performance Low arc voltage and low energy let-through (I2t) Low watts loss
Fig. 3: EET, FEE
48 63.5 77 9.7
8.7
1.0
Fig. 2: ET, FE
54.8 64.3 74.6
6.4
K
1)
1000
Power losses
1.2
0.4
UL
1500
1007—July 2015
Eaton.com/bussmannseries
38 Figs. 4 & 5 “A” Dimensions Type “A” FM 80-85mm FMM 80-85mm MT 85mm MMT 85mm
83
113
High speed fuses
6
British BS 88
Catalog numbers
ET
FE
EET
FEE
FM
FMM
MT
MMT
• Watts loss provided at rated current. • Note: FC, 8ET, 12ET, 15ET, 20ET, 65EET and 75EET are available for replacement purposes on existing equipment. • See accessories on page 6-102.
Time-current curve 104 6 4 2 103 6 4
25ET 32ET 35ET 40ET 45ET 56ET 63ET 80ET
2 102 6 4 Virtual Pre-Arcing Time In Seconds
CT
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
2 101 6 4
6CT 10CT 12CT 16CT 20CT
2 100 6 4 2 10–1
6 4 2
10–2 6 4 2 10–3
6 4 2
10–4
2
4
6
8 101
2
4
6
2
8 102
4
6
Prospective Current In Amps RMS
8 103
Peak let-through curve 6 4 2
315MT 355MT 280MT 250MT
105
6
180MT 160MT
4 2
710MMT 630MMT 560MMT 500MMT 450MMT 400MMT 355MMT 315MMT 280MMT 200MT 225MMT 200MMT 180MMT
104
Peak Let-Through Current
Type
CT 6-20, ET 25-80A: 690V
High speed fuses
Catalog numbers 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
Electrical characteristics Rated I2t (A2 sec) current Clearing Clearing RMS-amps Pre-arc at 415V at 660V 6 1.8 8.5 12 10 7 30 48 12 10 40 65 16 16 66 110 20 32 150 220 25 25 150 250 32 32 190 350 35 52 310 500 103 600 900 40 45 103 680 1100 56 135 950 1500 63 171 1200 2000 80 360 2500 4000 35 33 130 200 40 52 180 300 45 76 270 450 50 103 380 600 63 135 480 750 71 210 600 950 80 250 900 1500 90 360 1300 2100 100 470 1800 2800 90 490 3000 4500 600 4000 6500 110 140 1050 7000 12000 160 1500 10000 17000 100 400 1600 2400 120 540 1900 3100 140 850 2500 3800 160 1000 3700 5700 180 1400 5300 8400 200 1900 7100 11400 180 1400 7500 13500 200 2600 10500 18500 225 3700 14500 26500 250 5200 20500 37500 280 7000 30500 55000 315 10000 40000 77000 350 15000 60000 105000 400 10000 40000 72500 450 15000 60000 105000 500 20000 82000 150000 550 30000 120000 215000 630 45000 180000 310000 700 60000 245000 420000 160 2400 15000 25000 180 3800 25000 38000 200 6000 40000 58000 250 11500 80000 110000 280 16500 100000 150000 315 19000 125000 180000 355 22000 160000 200000 180 1650 12000 18000 200 2200 16000 23000 225 3700 26000 40000 280 6600 47000 70000 315 8600 62000 91000 355 13500 97000 140000 400 21000 150000 220000 450 30000 220000 320000 500 42000 300000 450000 560 60000 430000 640000 630 68500 500000 720000 710 78000 600000 850000
6 4 2
103
6 4 2
20CT 16CT 12CT 10CT 6CT
102
6 4
160EET 140EET 110EET 90EET
80ET 63ET 56ET 45ET 40ET 35ET 32ET 25ET
2
101
101
2
4
6
102
2
4
6
103
2
4
6
104
Prospective Short-Circuit Current Symmetrical RMS
2
4
6
105
2
Data Sheet: 35785312 BUSSMANN SERIES FULL LINE CATALOG
1007—July 2015
Eaton.com/bussmannseries
6-99
High speed fuses
6
British BS 88
EET 90-160A, MT 160-355A: 690V
MMT 180-710A: 690V
Time-current curve 104
Time-current curve 104
6 4
2
2 103
6 4 2
101
6 4
90EET 110EET 140EET 160EET
2 100
6 4 2
10
–1
6 4
180MMT 200MMT 225MMT 280MMT 315MMT 355MMT
6 4 2
100
6 4 2
10–1
10–2
6 4
6 4
6 4 2
10–3
2 10–4
6 4
2
6 4 2
10–3
6 4
2 101
2 10–2
400MMT 450MMT 500MMT 560MMT 630MMT 710MMT
2 102
Virtual Pre-Arcing Time In Seconds
Virtual Pre-Arcing Time In Seconds
103
160MT 180MT 200MT 250MT 280MT 315MT 355MT
6 4 2
102
6 4
2
4
6
8 102
2
4
6
8 103
2
4
6
Prospective Current In Amps RMS
8 104
6 4 2
10–4
2
102
4 6 8 2 4 103 Prospective Current In Amps RMS
Data Sheet: 35785313
Data Sheet: 35785311
Peak let-through curve 6 4 2
315MT 355MT 280MT 250MT
105
6
180MT 160MT
4 2
710MMT 630MMT 560MMT 500MMT 450MMT 400MMT 355MMT 315MMT 280MMT 200MT 225MMT 200MMT 180MMT
Peak Let-Through Current
104
6 4 2
103
6 4 2
20CT 16CT 12CT 10CT 6CT
102
6 4
160EET 140EET 110EET 90EET
80ET 63ET 56ET 45ET 40ET 35ET 32ET 25ET
2
101
6-100
101
2
4
BUSSMANN SERIES FULL LINE CATALOG
6
102
2
4
6
103
2
4
6
104
Prospective Short-Circuit Current Symmetrical RMS
1007—July 2015
2
4
6
105
2
Eaton.com/bussmannseries
6
8
104
High speed fuses
6
British BS 88
FE 35-100A and FM 180-350A: 690V
FEE 100-200A and FMM 400-700A: 690V
Time-current curve
103
Time-current curve 104 6 4
6 4 2
2
6 4
103 6 4
2
Virtual Pre-Arcing Time In Seconds
2
180FM 200FM 220FM 250FM 280FM 315FM 350FM
102 6 4 2 101 6 4 2
35FE 40FE 45FE 50FE 63FE 71FE 80FE 90FE 100FE
100 6 4 2 10–1 6 4 2 10–2 6 4
2 101 6 100FEE 4 120FEE 140FEE 2 160FEE 180FEE 100 200FEE 6 4 2 10–1 6 4 2 10–2 6 4
2 10–3 6 4
2
2 10–4
400FMM 450FMM 500FMM 550FMM 630FMM 700FMM
102 6 4 Virtual Pre-Arcing Time In Seconds
104
2
4
6
8 102
2
4
6
8 103
2
4
6
Prospective Current In Amps RMS
8 104
10–3 6 4 2 10–4
Peak let-through curve
2
102
4 350FM 315FM 280FM 250FM 225FM 200FM 180FM
4 2 103
6 4 2
100FE 90FE 80FE 71FE 63FE 50FE 45FE 40FE 35FE
102
6 4 2 2
4
6
102
2
4
6
103
2
4
6
104
Prospective Short-Circuit Current Symmetrical RMS
700FMM
4
450FMM
630FMM 550FMM 500FMM
400FMM
2
104
8 6 4
2
103
200FEE
8
4
6
105
180FEE
6
2
160FEE 140FEE
4
2
Data Sheet: 35785314
104
2
Peak Let-Through Current
Peak Let-Through Current
6
101
8 6
104
8
High speed fuses
6 2
6
Peak let-through curve
105
101
4 6 8 2 4 103 Prospective Current In Amps RMS
120FEE 100FEE 102
2
4
6
103
2
4
6
104
2
4
Prospective Short-Circuit Current Symmetrical RMS
6
105
2
Data Sheet: 35785292
BUSSMANN SERIES FULL LINE CATALOG
1007—July 2015
Eaton.com/bussmannseries
6-101
High speed fuses
6
British BS 88 fuse accessories
Indicator system
CL1 panel mount clips
CL1 panel mount fuse clips are available for mounting a trip-indicator when mounting directly on the fuse is impractical. Order part number CL1.
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.
Trip-indicator Dimensions - mm
TI500 500 700 130 0.3 1.5A 100,000 23 46
TI700 700 1000 350 0.45 1.5A 100,000 23 46
Fuse Indicator Kits Kit. ref. EC-250 MC250 EC-600 MC600 MC700
Details Fuse mount Indicator kits (Includes one indicator and two clips)
B 21
C 6
D
Ref. TI250 TI500 TI600 TI700 TI1100 TI1500 TI2000 TI2500
Dim. “A” (mm) 37.6 47.5 55.7 61.8 98.4 120.6 147.5 198.3
CL1 panel mount clip Dimensions - mm
For use with fuse ref. LET LMT and LMMT FE, FEE and ET FM and FMM MT and MMT
Microswitch adapter – MAI
We offer 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.
50.8
B
NO NC NC NO
Dimensions - in mm
Microswitch and adapter Type MAI Current rating: AC 50/60Hz resistive load @ 250V RMS AC 50/60Hz resistive load @ 127V RMS DC, resistive load @ 110Vdc DC, resistive load @ 30Vdc Maximum working voltage: Contact-to-contact (RMS) Contact-to-contact (RMS) Maximum DC volts:
6-102
6.0
Terminal arrangement
4A 6A 0.7A DC 2A DC 1000V 1500V 110Vdc
BUSSMANN SERIES FULL LINE CATALOG
1007—July 2015
Eaton.com/bussmannseries
6.35
6.8
RMS volts 250 500 600 700 1100 1500 2000 2500
14
RMS volts 250 250 660 660 700
F
E 0.8
A
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 Total I2t (max volts)
Trip indicator
8.7
