Fuse Tables; Protection; Fuse Selection - Danfoss VLT AQUA Drive D-Frame Operating Instructions Manual

Specifications

10.3 Fuse Tables

10.3.1 Protection

Branch Circuit Protection
In order to protect the installation against electrical and
fire hazard, all branch circuits in an installation, switch
gear, machines etc., must be short-circuited and over-
current protected according to national/international
regulations.
Short-circuit Protection
The frequency converter must be protected against short-
circuit to avoid electrical or fire hazard. Danfoss
recommends using the fuses mentioned below to protect
service personnel and equipment in case of an internal
failure in the frequency converter. The frequency converter
provides full short-circuit protection in case of a short-
circuit on the motor output.
Over-current Protection
Provide overload protection to avoid fire hazard due to
overheating of the cables in the installation. The frequency
converter is equipped with an internal over-current
protection that can be used for upstream overload
Power
Size
Bussman
PN
N110 170M2619 LA50QS300-4 L50S-300
10 10
N132 170M2620 LA50QS350-4 L50S-350
N160 170M2621 LA50QS400-4 L50S-400
N200 170M4015 LA50QS500-4 L50S-500
N250 170M4016 LA50QS600-4 L50S-600
N315 170M4017 LA50QS800-4 L50S-800
Table 10.6 Fuse Options for 380-480 V Frequency Converters
VLT Model
N75k T7
N90k T7
N110 T7
N132 T7
N160 T7
N200 T7
N250 T7
N315 T7
N400 T7
Table 10.7 Fuse Options for 525-690 V Frequency Converters
78
Littelfuse PN Littelfuse
PN
OEM
Bussmann PN Siba PN
170M2616 20 610 31.160
170M2619 20 610 31.315
170M2619 20 610 31.315
170M2619 20 610 31.315
170M2619 20 610 31.315
170M4015 20 620 31.550
170M4015 20 620 31.550
170M4015 20 620 31.550
170M4015 20 620 31.550
MG21A202 - VLT
VLT ® AQUA Drive D-Frame
Operating Instructions
protection (UL-applications excluded). See 4-18 Current
Limit. Moreover, fuses or circuit breakers can be used to
provide the over-current protection in the installation.
Over-current protection must always be carried out
according to national regulations.

10.3.2 Fuse Selection

Danfoss recommends using the following fuses which will
ensure compliance with EN50178. In case of malfunction,
not following the recommendation may result in
unnecessary damage to the frequency converter.
The fuses below are suitable for use on a circuit capable of
delivering 100,000 Arms (symmetrical).
N110-N315
N75K–N400
Table 10.5
Fuse options
Bussmann Siba PN Ferraz-Shawmut
PN PN
FWH-300A 20 610 A50QS300-4
31.315
FWH-350A 20 610 A50QS350-4
31.350
FWH-400A 20 610 A50QS400-4
31.400
FWH-500A 20 610 A50QS500-4
31.550
FWH-600A 20 610 A50QS600-4
31.630
FWH-800A 20 610 A50QS800-4
31.800
Ferraz-Shawmut European PN
6,9URD30D08A0160
6,9URD31D08A0315
6,9URD31D08A0315
6,9URD31D08A0315
6,9URD31D08A0315
6,9URD32D08A0550
6,9URD32D08A0550
6,9URD32D08A0550
6,9URD32D08A0550
®
is a registered Danfoss trademark
380–500 V
525–690 V
Ferraz-Shawmut PN
(Europe)
6,9URD31D08A0315
6,9URD31D08A0350
6,9URD31D08A0400
6,9URD31D08A0550
6,9URD31D08A0630
6,9URD32D08A0800
Fuse options
Ferraz-Shawmut North American PN
A070URD30KI0160
A070URD31KI0315
A070URD31KI0315
A070URD31KI0315
A070URD31KI0315
A070URD32KI0550
A070URD32KI0550
A070URD32KI0550
A070URD32KI0550
type aR
type aR
Ferraz-Shawmut PN
(North America)
A070URD31KI0315
A070URD31KI0350
A070URD31KI0400
A070URD31KI0550
A070URD31KI0630
A070URD31KI0800