Electrical Installation; How To Connect; Electrical Installation In General - Danfoss VLT Micro Drive FC 51 Operating Instructions Manual

VLT Micro Drive FC 51 Operating Instructions

3. Electrical Installation

3.1. How to Connect

3.1.1. Electrical Installation in General

Details of terminal tightening torques.
Frame
M1
M2
M3
1)
Spade connectors
Table 3.1: Tightening of terminals.
3.1.2. Fuses
Branch circuit protection:
In order to protect the installation against electrical and fire hazard, all branch circuits in an in-
stallation, switch gear, machines etc., must be short-circuited and overcurrent protected according
to national/international regulations.
Short circuit protection:
Danfoss recommends using the fuses mentioned in the following tables to protect service per-
sonnel 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 or
brake output.
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
maximum.
NonUL compliance:
If UL/cUL is not to be complied with, Danfoss recommends using the fuses mentioned in table
1.3, which will ensure compliance with EN50178:
In case of malfunction, not following the fuse recommendation may result in damage to the fre-
quency converter.
NB!
All cabling must comply with national and local regulations on cable cross-sections
and ambient temperature. Copper conductors required, (60-75° C) recommended.
Power (kW)
1 x 3 x 3 x
200-240 V 200-240 V 380-480 V
0.18 - 0.75 0.25 - 0.75 0.37 - 0.75
1.5 1.5 1.5 - 2.2
2.2 2.2 - 3.7 3.0 - 7.5
MG.02.A2.02 - VLT ® is a registered Danfoss trademark
Torque (Nm)
DC con-
Control
nection/
Line Motor
Terminals
1)
Brake
1.4 0.7 - 0.15
1.4 0.7 - 0.15
1.4 0.7 - 0.15
3. Electrical Installation
Earth Relay
3 0.5
3 0.5
3 0.5
(symmetrical), 480 V
rms
3
9