Peter electronic VersiStart i III, Commissioning Instructions

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23 VersiStart i III
7.7 Power Supply Fuses
Semiconductor fuses can be used for Type 2 coordination (according to IEC 60947-4-2 standard) and to reduce the risk of damage to
SCRs from transient overload currents.
HRC fuses (such as Ferraz/Mersen AJT fuses) can be used for Type 1 coordination according to IEC 60947-4-2 standard.
CAUTION
Adaptive Control controls the motor's speed profile, within the programmed time limit. This may result in a higher level
of current than traditional control methods.
For applications using Adaptive Control to soft stop the motor with stop times greater than 30 seconds, motor branch protection should
be selected as follows:
x
standard HRC line fuses: minimum 150% motor full load current
x
motor rated line fuses: minimum rating 100/150% motor full load current
x
motor control circuit breaker minimum long time setting: 150% motor full load current
x
motor control circuit breaker minimum short time setting: 400% motor full load current for 30 seconds
NOTE
Fuse selection is based on a 400% FLC start for 20 seconds in conjunction with standard published starts per hour, duty
cycle, 40°C ambient temperature and up to 1000 m altitude. For installations operating outside these conditions,
consult your local supplier.
These fuse tables contain recommendations only. Always consult your local supplier to confirm the selection for your
particular application.
7.7.1 Bussman Fuses - Square Body (170M)
Model
SCR I
2
t (A
2
s)
Supply Voltage
< 440 VAC
Supply Voltage
< 575 VAC
Supply Voltage
< 690 VAC
VS i III 23 1150 170M1314 170M1314 170M1314
VS i III 43 8000 170M1316 170M1316 170M1316
VS i III 50 10500 170M1318 170M1318 170M1318
VS i III 53 15000 170M1318 170M1318 170M1318
VS i III 76 15000 170M1319 170M1319 170M1318
VS i III 97 51200 170M1321 170M1321 170M1319
VS i III 100 80000 170M1321 170M1321 170M1321
VS i III 105 125000 170M1321 170M1321 170M1321
VS i III 145 125000 170M1321 170M1321 170M1321
VS i III 170 320000 170M2621 170M2621 170M2621
VS i III 200 320000 170M2621 170M2621 170M2621
VS i III 220 320000 170M2621 170M2621 170M2621
VS i III 255 320000 170M2621 170M2621 170M2621
VS i III 255N 320000 170M2621 170M2621 170M2621
VS i III 350 202000 170M5011 170M5011 ––
VS i III 360N 320000 170M6010 170M6010 170M6010
VS i III 380N 320000 170M6011 170M6011 ––
VS i III 425 320000 170M6011 –– ––
VS i III 430N 320000 170M6011 170M6011 ––
VS i III 500 320000 170M6008* –– ––
VS i III 580 781000 170M6013 170M6013 170M6013
VS i III 620N 1200000 170M6015 170M6015 170M6014
VS i III 650N 1200000 170M6015 170M6015 170M6014
VS i III 700 781000 170M5015 170M5015 ––
VS i III 790N 2530000 170M6017 170M6017 170M6016
VS i III 820 1200000 170M5017 170M6015 ––
VS i III 920 2530000 170M6017 170M6017 ––
VS i III 930N 4500000 170M6019 170M6019 170M6019
VS i III 1000 2530000 170M6018 170M6013* ––
VS i III 1200N 4500000 170M6021 –– ––
VS i III 1410N 6480000 –– –– ––
VS i III 1600N 12500000 170M6019* –– ––
* Two parallel connected fuses required per phase.