Shielded Cables; Fuses - Danfoss VLT AFE 302 Operating Instructions Manual

How to Install

4.3.6 Shielded Cables

NOTE
Danfoss recommends to use shielded cables between the
LCL filter and the AFE unit. Unshielded cables can be
between transformer and LCL filter input side.
It is important that shielded and armoured cables are
4 4
connected in a proper way to ensure the high EMC immunity
and low emissions.
The connection can be made using either cable glands or
clamps:
•
EMC cable glands: Generally available cable glands
can be used to ensure an optimum EMC
connection.
•
EMC cable clamp: Clamps allowing easy connection
are supplied with the frequency converter.

4.3.7 Fuses

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 conveter. 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
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.
525-690V, frame sizes D, E and F
The fuses below are suitable for use on a circuit capable of
delivering the Short Circuit Current Rating (SCCR) of 100,000
Amps (symmetrical).
30
®
VLT Active Front End AFE 302 Operating Instructions Liebherr
Size/
Type
P630
P710
P800
P900
P1M0
P1M2
Table 4.4 Frame Size F, Line Fuses, 525-690V
Size/Type
P630-
P1M2
Table 4.5 Frame Size F, Inverter Module DC Link Fuses, 525-690V
*170M fuses from Bussmann use the -/80 visual indicator, -
TN/80 Type T, -/110 or TN/110 Type T indicator fuses of the
same size and amperage may be substituted for the external
use.
Supplementary fuses
Frame size
D, E and F
Table 4.6 SMPS Fuse
Size/Type
P37K-P400,
525-690V
P500-P1M2,
525-690V
Table 4.7 Fan Fuses
Bussmann PN
FWC-20A-10F
Table 4.8 Fan Voltage/Softcharge Fuse
®
MG.33.X2.02 - VLT is a registered Danfoss trademark
Bussmann
Rating Siba
PN*
170M7081 1600A, 20 695 32.1600
700V
170M7081 1600A, 20 695 32.1600
700V
170M7081 1600A, 20 695 32.1600
700V
170M7081 1600A, 20 695 32.1600
700V
170M7082 2000A, 20 695 32.2000
700V
170M7083 2500A, 20 695 32.2500
700V
Bussmann
Rating
PN*
170M8611 1100A,
1000V
Bussmann PN*
KTK-4
Bussmann PN* LittelFuse
KTK-4
KLK-15
Rating
20A, 600V
Internal
Bussmann
Option
170M7082
170M7082
170M7082
170M7082
170M7082
170M7083
Siba
20 781 32. 1000
Rating
4A, 600V
Rating
4A, 600V
15A, 600V