Fuses - Danfoss VLT FC 103 Operating Manual

Specifications
Speed accuracy (open loop)
All control characteristics are based on a 4-pole asynchronous motor.
Control card performance
Scan interval
Control card, USB serial communication
USB standard
USB plug
NOTICE
Connection to PC is carried out via a standard host/device USB cable.
The USB connection is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
The USB connection is not galvanically isolated from ground. Use only isolated laptop/PC as connection to the USB
connector on the drive or an isolated USB cable/converter.

9.7 Fuses

Fuses ensure that possible damage to the drive is limited to damages inside the unit. To ensure compliance with EN 50178,
use identical Bussmann fuses as replacements. Refer to Table 9.5.
NOTICE
Use of fuses on the supply side is mandatory for IEC 60364 (CE) and NEC 2009 (UL) compliant installations.
Input voltage (V)
380–500
525–690
Table 9.5 Fuse Options
The fuses listed in Table 9.5 are suitable for use on a circuit capable of delivering 100000 A
the drive voltage rating. With the proper fusing, the drive short-circuit current rating (SCCR) is 100000 A
drives are supplied with internal drive fusing to meet the 100 kA SCCR. E3h and E4h drives must be fitted with Type aR
fuses to meet the 100 kA SCCR.
NOTICE
DISCONNECT SWITCH
All units ordered and supplied with a factory-installed disconnect switch require Class L branch circuit fusing to meet
the 100 kA SCCR for the drive. If a circuit breaker is used, the SCCR rating is 42 kA. The specific Class L fuse is
determined by the input voltage and power rating of the drive. The input voltage and power rating is found on the
product nameplate. See chapter 4.1 Items Supplied.
Input voltage (V) Power rating (kW)
380–480 355–450
380–480 500–560
525–690 450–630
525–690 710–800
MG16P222
Operating Guide
Bussmann part number
170M7309
170M7342
Short circuit rating (A)
42000
100000
42000
100000
42000
10000
42000
100000
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30–4000 RPM: Maximum error of ±8 RPM
1.1 (full speed)
USB type B device plug
(symmetrical), depending on
rms
. E1h and E2h
rms
Required protection
Circuit breaker
Class L fuse, 800 A
Circuit breaker
Class L fuse, 1200 A
Circuit breaker
Class L fuse, 800 A
Circuit breaker
Class L fuse, 1200 A
5 M/S
9 9
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