Short Circuit Current Rating (Sccr) - Danfoss VLT AutomationDrive FC 300 Instruction Manual

Specifications
VLT Bussman Littelfuse PN
Model PN
N90K 170M2619 LA50QS300-4 L50S-300
N110 170M2620 LA50QS350-4 L50S-350
N132 170M2621 LA50QS400-4 L50S-400
N160 170M4015 LA50QS500-4 L50S-500
N200 170M4016 LA50QS600-4 L50S-600
N250 170M4017 LA50QS800-4 L50S-800
Table 10.6 Fuse Options for 380–500 V Adjustable Frequency Drives
VLT© Model Bussmann PN
N55k T7 170M2616
N75k T7 170M2619
N90k T7 170M2619
N110 T7 170M2619
N132 T7 170M2619
N160 T7 170M4015
N200 T7 170M4015
N250 T7 170M4015
N315 T7 170M4015
Table 10.7 Fuse Options for 525–690 V Adjustable Frequency Drives
For UL compliance, for units supplied without a contactor-
only option, the Bussmann 170M series fuses must be
used. See Table 10.9 for SCCR ratings and UL fuse criteria if
a contactor-only option is supplied with the adjustable
frequency drive.

10.3.3 Short Circuit Current Rating (SCCR)

If the adjustable frequency drive is not supplied with a line
power disconnect, contactor or circuit breaker, the Short
Circuit Current Rating (SCCR) of the adjustable frequency
drives is 100,000 amps at all voltages (380–690 V).
If the adjustable frequency drive is supplied with a line
power disconnect, the SCCR of the adjustable frequency
drive is 100,000 amps at all voltages (380–690 V).
If the adjustable frequency drive is supplied with a circuit
breaker, the SCCR depends on the voltage, see Table 10.8:
®
VLT Automation Drive D-Frame
Instruction Manual
Littelfuse Bussmann Siba PN
PN PN
FWH-300A 20 610
31.315
FWH-350A 20 610
31.350
FWH-400A 20 610
31.400
FWH-500A 20 610
31.550
FWH-600A 20 610
31.630
FWH-800A 20 610
31.800
Siba PN Ferraz-Shawmut European PN
20 610 31.160 6.9URD30D08A0160
20 610 31.315 6.9URD31D08A0315
20 610 31.315 6.9URD31D08A0315
20 610 31.315 6.9URD31D08A0315
20 610 31.315 6.9URD31D08A0315
20 620 31.550 6.9URD32D08A0550
20 620 31.550 6.9URD32D08A0550
20 620 31.550 6.9URD32D08A0550
20 620 31.550 6.9URD32D08A0550
®
MG34U222 - VLT is a registered Danfoss trademark
Ferraz-Shawmut Ferraz-Shawmut PN
PN (Europe)
A50QS300-4 6.9URD31D08A0315
A50QS350-4 6.9URD31D08A0350
A50QS400-4 6.9URD31D08A0400
A50QS500-4 6.9URD31D08A0550
A50QS600-4 6.9URD31D08A0630
A50QS800-4 6.9URD32D08A0800
Ferraz-Shawmut North American PN
415 V 480 V
D6h frame 120,000 A 100,000 A
D8h frame 100,000 A 100,000 A
Table 10.8 Adjustable Frequency Drive
Supplied with a Circuit Breaker
If the adjustable frequency drive is supplied with a
contactor-only option and is externally fused according to
Table 10.9, the SCCR of the adjustable frequency drive is as
follows:
415 V 480 V
IEC 1) UL
D6h frame 100,000 A 100,000 A
D8h frame (not 100,000 A 100,000 A
including the
N250T5)
D8h frame 100,000 A Consult
(N250T5 only) factory
Table 10.9 Adjustable Frequency Drive Supplied with a Contactor
1)
With a Bussmann type LPJ-SP or Gould Shawmut type AJT fuse.
450 A max fuse size for D6h and 900 A max fuse size for D8h.
Ferraz-Shawmut PN
(North America)
A070URD31KI0315
A070URD31KI0350
A070URD31KI0400
A070URD31KI0550
A070URD31KI0630
A070URD31KI0800
A070URD30KI0160
A070URD31KI0315
A070URD31KI0315
A070URD31KI0315
A070URD31KI0315
A070URD32KI0550
A070URD32KI0550
A070URD32KI0550
A070URD32KI0550
600 V 690 V
65,000 A 70,000 A
42,000 A 30,000 A
600 V 690 V
2) UL 2) IEC 1)
100,000 A 100,000 A
100,000 A 100,000 A
Not applicable
10-9
10 10