Danfoss VLT FC 100 Operating Instructions

3.3.13 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 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
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.
UL compliance
The fuses below are suitable for use on a circuit capable of
delivering 100,000 Arms (symmetrical), 240 V, or 480 V, or
500 V, or 600 V depending on the frequency converter
voltage rating. With the proper fusing the frequency
converter Short Circuit Current Rating (SCCR) is 100,000
Arms.
Power size Frame Rating Bussmann
Spare
Bussmann
Est. Fuse Power Loss [W]
FC 302 Size Voltage (UL) Amperes P/N P/N 400 V 460 V
P250T5 F8/F9 700 700 170M4017 176F8591 25 19
P315T5 F8/F9 700 700 170M4017 176F8591 30 22
P355T5 F8/F9 700 700 170M4017 176F8591 38 29
P400T5 F8/F9 700 700 170M4017 176F8591 3500 2800
P450T5 F10/F11 700 900 170M6013 176F8592 3940 4925
P500T5 F10/F11 700 900 170M6013 176F8592 2625 2100
P560T5 F10/F11 700 900 170M6013 176F8592 3940 4925
P630T5 F10/F11 700 1500 170M6018 176F8592 45 34
P710T5 F12/F13 700 1500 170M6018 176F9181 60 45
P800T5 F12/F13 700 1500 170M6018 176F9181 83 63
Table 3.3 Line Fuses, 380-500 V
Power size Frame Rating Bussmann
Spare
Bussmann
Est. Fuse Power Loss [W]
FC 302 Size Voltage (UL) Amperes P/N P/N 600 V 690 V
P355T7 F8/F9 700 630 170M4016 176F8335 13 10
P400T7 F8/F9 700 630 170M4016 176F8335 17 13
P500T7 F8/F9 700 630 170M4016 176F8335 22 16
P560T7 F8/F9 700 630 170M4016 176F8335 24 18
P630T7 F10/F11 700 900 170M6013 176F8592 26 20
P710T7 F10/F11 700 900 170M6013 176F8592 35 27
P800T7 F10/F11 700 900 170M6013 176F8592 44 33
P900T7 F12/F13 700 1500 170M6018 176F9181 26 20
P1M0T7 F12/F13 700 1500 170M6018 176F9181 37 28
P1M2T7 F12/F13 700 1500 170M6018 176F9181 47 36
P1M4T7 F14 700 1500 170M6018 176F9181 47 36
Table 3.4 Line Fuses, 525-690 V
How to Install
VLT
®
Automation Drive FC 300 12-Pulse
Operating Instructions High Power
42 MG34Q202 - VLT
®
is a registered Danfoss trademark
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3

Danfoss VLT FC 100 Specifications

General

Brand	Danfoss
Model	VLT FC 100
Category	DC Drives
Language	English