Danfoss VLT FC 103 Operating Guide

9.6.11 Control Characteristics
Resolution of output frequency at 0–1000 Hz ±0.003 Hz
System response time (terminals 18, 19, 27, 29, 32, 33) ≤2 ms
Speed control range (open loop) 1:100 of synchronous speed
Speed accuracy (open loop) 30–4000 RPM: Error ±8 RPM
All control characteristics are based on a 4-pole asynchronous motor.
9.6.12 Control Card Performance
Scan interval 5 ms
9.6.13 Control Card, USB Serial Communication
USB standard
1.1 (full speed)
(1)
USB plug
USB type B plug
(2) (3)
1
Connection to PC is carried out via a standard host/device USB cable.
2
The USB connection is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
3
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 installed on the supply side ensure that if a component breakdown (first fault) occurs inside the drive, any potential damage is
contained inside the drive enclosure. To ensure compliance with EN 50178, use identical Bussmann fuses as replacements. Refer to
table 46.
NOTICE
IEC 60364 (CE) and NEC 2009 (UL) COMPLIANCE
Drives without supply side fuses do not meet IEC 60364 (CE) and NEC 2009 (UL) compliant installation standards.
-
Install specified fuses on the supply side of the installation.
Table 46: Fuse Options
Input voltage (V) Model Bussmann part number
380–480 N355–N400 170M6014
380–480 N450–N560 170M7309
525–690 All 170M7342
The fuses listed in table 46 are suitable for use on a circuit capable of delivering 100000 A
rms
(symmetrical), depending on the drive
voltage rating. With the proper fusing, the drive short-circuit current rating (SCCR) is 100000 A
rms
. E1h and E2h 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.
Specifications
Operating Guide | VLT® Refrigeration Drive FC 103
AQ275652766279en-000101 / 130R0707
138 | Danfoss A/S © 2020.01

Danfoss VLT FC 103 Specifications

General

Brand	Danfoss
Model	VLT FC 103
Category	DC Drives
Language	English