Safety Instructions; Introduction; Purpose Of The Manual; Additional Resources - Danfoss VLT Micro Drive FC 51 Kurzanleitung

Quick Guide
See EN 60364-5-54 § 543.7 for further information.
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 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, contact Danfoss regarding
PELV.

1.1.1 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.

1.2 Introduction

1.2.1 Purpose of the Manual

These operating instructions provide information for safe
installation and commissioning of the VLT
51 frequency converter.
The operating instructions are intended for use by
qualified personnel.
To use the frequency converter safely and professionally,
read and follow the operating instructions. Pay particular
attention to the safety instructions and general warnings.
Always keep these operating instructions with the
frequency converter.
MG02BB4P
Quick Guide●Kurzanleitung●Guide rapide●Guía rápida●Guia Rápido●Краткое
руководство
®
VLT is a registered trademark.

1.2.2 Additional Resources

Additional resources are available to understand advanced
frequency converter functions and programming:
•
•
•
Supplementary publications and manuals are available at:
vlt-drives.danfoss.com/Support/Technical-Documentation/
The frequency converter complies with UL 508C thermal
memory retention requirements. For more information,
refer to the section Motor Thermal Protection in the
product-specific design guide.

1.2.3 IT Mains

NOTICE
IT MAINS
Installation on isolated mains source, that is IT mains.
Maximum supply voltage allowed when connected to
mains: 440 V.
As an option, Danfoss offers recommended line filters for
improved harmonics performance. Table 1.10

1.2.4 Avoid Unintended Start

While the frequency converter is connected to mains, the
motor can be started/stopped using digital commands, bus
®
Micro Drive FC
commands, references, or via the LCP (local control panel).
To avoid unintended start:
•
•
Danfoss A/S © 05/2016 All rights reserved.
®
The VLT Micro Drive FC 51 Programming Guide
provides greater detail on working with
parameters and many application examples.
®
The VLT Micro Drive Design Guide provides
detailed information about capabilities and
functionality to design motor control systems.
Instructions for operation with optional
equipment, and replacement of components.
Disconnect the frequency converter from mains
for personal safety considerations.
Always press [Off/Reset] before changing
parameters.
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