Danfoss VLT Pocket Guide

VLT
®
Soft Starter Pocket Guide 37
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
200~575 V
SCR I
2
t
(A
2
s)
Bussmann Fuse
Square Body (170M)
Bussmann Fuse
British Style (BS88)
MCD200-007 170M-1314 63 FE 1150
MCD200-015 170M-1317 160 FEE 8000
MCD200-018 170M-1318 160 FEE 10500
MCD200-022 170M-1318 180 FM 15000
MCD200-030 170M-1319 180 FM 18000
MCD200-037 170M-1321 250 FM 51200
MCD200-045 170M-1321 250 FM 80000
MCD200-055 170M-1321 250 FM 97000
MCD200-075 170M-1322 500 FMM 168000
MCD200-090 170M-3022 500 FMM 245000
MCD200-110 170M-3022 500 FMM 320000
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
Bussmann Fuse
400V
Bussmann Fuse
690V
SCR I
2
t
(A
2
s)
MCD3007 170M1315 170M1314 1150
MCD3015 170M1318 170M1317 8000
MCD3018 170M1319 170M1317 10500
MCD3022 170M1319 170M1318 15000
MCD3030 170M1319 170M2616 15000
MCD3037 170M1322 170M1320 51200
MCD3045 170M1322 170M1321 80000
MCD3055 170M1322 170M1322 97000
MCD3075 170M2621 170M1322 97000
MCD3090 170M3021 170M3020 245000
MCD3110 170M3023 170M3023 414000
MCD3132 170M3023 170M3023 414000
MCD3185 170M6011 170M4145 238000
MCD3220 170M6012 170M6011 320000
MCD3300 170M6014 170M4018 781000
MCD3315 170M5017 170M6014 1200000
MCD3400 170M6019 170M6017 2532000
MCD3500 170M6021 170M6151 4500000
MCD3600 170M6021 170M6151 4500000
MCD3700 170M6021 2 x 170M5018 6480000
MCD3800 170M6021 2 x 170M5018 13000000
Semiconductor Fuse Selection: Type 2

Danfoss VLT Specifications

General

Brand	Danfoss
Model	VLT
Category	DC Drives
Language	English