Models Mcd6-0654B~Mcd6-1250B & Mcd6-0590C~Mcd6-1134C; High Fault Short-Circuit Current Ratings - Danfoss VLT MCD 600 Operating Manual

VLT® Soft Starter MCD 600
Operating Guide
Model
MCD6-0410B
MCD6-0527B
MCD6-0579B
Suitable for use in a circuit with the prospective current noted, when protected by any listed fuses or listed circuit breakers sized according to the
1
NEC.
3.15.1.2 Models MCD6-0654B~MCD6-1250B & MCD6-0590C~MCD6-1134C
Suitable for use on a circuit capable of delivering up to the stated fault current, when protected by the specified circuit breaker, or
by a class L fuse sized according to the NEC.
These nominal ratings are based on start current of 300% FLC for 10 s for models MCD6-0654B~MCD6-1250B and start current of
300% at 50% duty for models MCD6-0590C~MCD6-1134C.
Table 19: Maximum Fuse Rating [A] - Standard Fault Short-Circuit Current
Model Nominal rating [A]
MCD6-0654B 835
MCD6-0736B 940
MCD6-0950B 1070
MCD6-1154B 1230
MCD6-1250B 1250
MCD6-0590C 735
MCD6-0667C 830
MCD6-0839C 1025
MCD6-0979C 1170
MCD6-1134C 1220

3.15.2 High Fault Short-circuit Current Ratings

Suitable for use on a circuit capable of delivering up to the stated fault current, when protected by the specified circuit breaker, or
by a class L fuse sized according to the NEC.
These nominal ratings are based on start current of 300% FLC for 10 s.
• Circuit breakers with model codes beginning with HFD/HJD/HKD/HLD are from Eaton.
• Circuit breakers with model codes beginning with SELA/SFLA/SGLA are from GE.
• Circuit breakers with model codes beginning with UTS are from LS Electric.
Models MCD6-0160C~MCD6-0448C are not UL Listed.
26 | Danfoss A/S © 2020.12
Nominal rating [A]
410
550
580
@480 V AC/600 V AC
Fault current rating [kA]
42
85
42
85
N O T I C E
3 cycle short cct rating @600 V AC
30 kA
Fuse rating [A]
1350
2500
1350
2500
System Design
(1)
@480 V AC
Circuit breaker [A]
1200
1200
1200
1200
AQ262141844215en-000401 / 175R1174