Installation; Side-By-Side Installation - Danfoss VLT Micro Drive FC 51 Guide Rapide

Quick Guide
1 1
Using RCDs
Where residual current devices (RCDs), also known as earth
leakage circuit breakers (ELCBs), are used, comply with the
following:
•
Use RCDs of type B that can detect AC and DC
currents.
•
Use RCDs with an inrush delay to prevent faults
due to transient ground currents.
•
Dimension RCDs according to the system configu-
ration and environmental considerations.
Motor thermal protection
Motor overload protection is possible by setting parameter
1-90 Motor Thermal Protection to [4] ETR trip. For the North
American market: Implemented ETR function provides class
20 motor overload protection, in accordance with NEC.
Installation at high altitudes
For altitudes above 2000 m (6562 ft), contact Danfoss
regarding PELV.
1.2.1 Safety Instructions
•
Make sure that the frequency converter is
properly grounded.
•
Do not remove mains connections, motor
connections, or other power connections while
the frequency converter is connected to power.
•
Protect users against supply voltage.
•
Protect the motor against overloading according
to national and local regulations.
•
The ground leakage current exceeds 3.5 mA.
Ground the frequency converter properly.
•
The [Off/Reset] key is not a safety switch. It does
not disconnect the frequency converter from
mains.

1.3 Installation

1.
Disconnect the VLT
mains (and external DC supply, if present).
2. Wait for 4 minutes (M1, M2, and M3) and 15
minutes (M4 and M5) for discharge of the DC-link.
See Table 1.1.
3. Disconnect the DC bus terminals and the brake
terminals (if present).
4. Remove the motor cable.
8
®
VLT Micro Drive FC 51
®
Micro Drive FC 51 from
Danfoss A/S © 10/2017 All rights reserved.

1.3.1 Side-by-side Installation

The frequency converter can be mounted side by side for
IP20 rating units and requires 100 mm (3.9 in) clearance
above and below for cooling. Refer to chapter 1.7 Specifi-
cations for details on environmental ratings of the
frequency converter.
MG02BC4P