Semiconductor Fuse Selection, Type 2 - Danfoss VLT Pocket Manual

Semiconductor Fuse Selection: Type 2
• Semiconductor fuses may be used with MCD soft starters. Use of semiconductor fuses
will provide Type 2 coordination and reduce the potential of SCR damage due to transient
overload currents and short circuits. MCD soft starters have been tested to achieve Type
2 coordination with semiconductor fuses. The following table provides a list of suitable
Bussman fuses. If selecting alternate brands ensure the selected fuse has a lower total
clearing I2t rating than the SCR, and can carry start current for the full start duration.
MCD200
MCD200-007
MCD200-015
MCD200-018
MCD200-022
MCD200-030
MCD200-037
MCD200-045
MCD200-055
MCD200-075
MCD200-090
MCD200-110
• Semiconductor fuses listed below are manufactured by Bussmann and should be ordered
directly from Bussmann or their local supplier. Instruction for selection for alternate semi-
conductor fuses is available from Danfoss.
MCD3000
MCD3007
MCD3015
MCD3018
MCD3022
MCD3030
MCD3037
MCD3045
MCD3055
MCD3075
MCD3090
MCD3110
MCD3132
MCD3185
MCD3220
MCD3300
MCD3315
MCD3400
MCD3500
MCD3600
MCD3700
MCD3800
200~575 V
Bussmann Fuse
Square Body (170M)
170M-1314
170M-1317
170M-1318
170M-1318
170M-1319
170M-1321
170M-1321
170M-1321
170M-1322
170M-3022
170M-3022
Bussmann Fuse
400V
170M1315
170M1318
170M1319
170M1319
170M1319
170M1322
170M1322
170M1322
170M2621
170M3021
170M3023
170M3023
170M6011
170M6012
170M6014
170M5017
170M6019
170M6021
170M6021
170M6021
170M6021
®
VLT Soft Starter Pocket Guide
Bussmann Fuse
British Style (BS88)
63 FE
160 FEE
160 FEE
180 FM
180 FM
250 FM
250 FM
250 FM
500 FMM
500 FMM
500 FMM
Bussmann Fuse
690V
170M1314
170M1317
170M1317
170M1318
170M2616
170M1320
170M1321
170M1322
170M1322
170M3020
170M3023
170M3023
170M4145
170M6011
170M4018
170M6014
170M6017
170M6151
170M6151
2 x 170M5018
2 x 170M5018
2
SCR I t
2
(A s)
1150
8000
10500
15000
18000
51200
80000
97000
168000
245000
320000
SCR I 2 t
(A 2 s)
1150
8000
10500
15000
15000
51200
80000
97000
97000
245000
414000
414000
238000
320000
781000
1200000
2532000
4500000
4500000
6480000
13000000
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