Fuses - Danfoss PK37 Quick Manual

Quick Guide
IP20 380-480 V 30-45 kW
95
1
2 3
1 Line
2 Motor
3 Earth
4 Relays
IP20 380-480 V 55-75 kW
1 2
3
1 Line
2 Relays
3 Earth
4 Motor
®
VLT HVAC Basic Drive Cascade Controller Quick Guide
99
4
4
®
MG18F202 - VLT is a registered Danfoss trademark
IP20 380-480 V 90 kW
1
2
3
1 Line
2 Relays
3 Earth
4 Motor

1.3.6 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-circuit and overcurrent
protected according to national/international regulations.
Short circuit protection
Danfoss recommends using the fuses mentioned in the
following tables to protect service personnel or other
equipment in case of an internal failure in the unit or
short-circuit on DC-link. The frequency converter provides
full short circuit protection in case of a short-circuit on the
motor.
Overcurrent protection
Provide overload protection to avoid overheating of the
cables in the installation. Overcurrent protection must
always be carried out according to national regulations.
Fuses must be designed for protection in a circuit capable
of supplying a maximum of 100,000 A
480 V maximum.
4
(symmetrical),
rms
7
1 1