Fuses - Danfoss VLT AutomationDrive FC 300 Instruction Manual

®
VLT AutomationDrive FC 300 Instruction
Manual
3.8: Cable entry holes for enclosure C1. The sug-
gested use of the holes are purely recommenda-
tions and other solutions are possible.
Term.
no.
1)
Protected Ground Connection

3.3.4. Fuses

Branch circuit protection:
In order to protect the installation against electrical and fire hazards, all branch circuits in an
installation, switch gear, machines, etc. must be short-circuited and overcurrent protected ac-
cording to national/international regulations.
Short-circuit protection:
The adjustable frequency drive must be protected against short circuit in order 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 drive. The adjustable frequency drive provides
full short-circuit protection in case of a short-circuit on the motor output.
Overcurrent protection:
Provide overload protection to avoid fire hazard due to overheating of the cables in the installation.
The adjustable frequency drive is equipped with an internal overcurrent protection that can be
used for upstream overload protection (UL applications excluded). See par. 4-18. Moreover, fuses
96 97 98 99
U V W 1) Motor voltage 0-100% of line voltage.
PE
3 wires out of motor
U1 V1 W1 Delta-connected
1)
PE
W2 U2 V2 6 wires out of motor
U1 V1 W1 1) Star-connected U2, V2, W2
PE
U2, V2 and W2 to be interconnected separately.
MG.33.A9.22 - VLT is a registered Danfoss trademark
3. How to Install
3.9: Cable entry holes for enclosure C2. The sug-
gested use of the holes are purely recommenda-
tions and other solutions are possible.
NOTE
When using motors without
phase insulation paper or other
insulation reinforcement suita-
ble for operation with voltage
supplied from adjustable fre-
quency drives, fit asine-wave fil-
ter on the output of the FC 300.
3
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