Installation Of Mains Shield For Frequency Converters; D-Frame Options; Load Share Terminals; Regeneration Terminals - Danfoss VLT AQUA Drive FC 202 Design Manual

Selection
3.2.5 Installation of Mains Shield for
Frequency Converters
This section is for the installation of a mains shield for the
frequency converter. It is not possible to install in the IP00/
3 3 Chassis versions as these enclosures include a standard a
metal cover. These shields satisfy VBG-4 requirements.
Ordering numbers:
Frame E1: 176F1851
NOTICE
For further information, see the Instruction Sheet,
175R5923

3.2.6 D-frame Options

3.2.6.1 Load Share Terminals

Load share terminals enable the connection of the DC
circuits of several frequency converters. Load share
terminals are available in IP20 frequency converters and
extend out the top of the unit. A terminal cover, supplied
with the frequency converter, must be installed to
maintain the IP20 rating of the enclosure. Illustration 3.18
shows both the covered and uncovered terminals.
Illustration 3.18 Load Share or Regeneration Terminal with
Cover (Left) and without Cover (Right)

3.2.6.2 Regeneration Terminals

Regen (regeneration) terminals can be supplied for
applications that have a regenerative load. A regenerative
unit, supplied by a third party, connects to the regen
terminals so that power can be sent back onto the mains,
resulting in energy savings. Regen terminals are available
in IP20 frequency converters and extend out the top of the
unit. A terminal cover, supplied with the frequency
converter, must be installed to maintain the IP20 rating of
the enclosure. Illustration 3.18 shows both the covered and
uncovered terminals.
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Design Guide

3.2.6.3 Anti-Condensation Heater

An anti-condensation heater can be installed inside the
frequency converter to prevent condensation from forming
inside the enclosure when the unit is turned off. The
heater is controlled by customer-supplied 230 V AC. For
best results, operate the heater only when the unit is not
running.
A 2.5 amp time-delay fuse, such as the Bussmann
LPJ-21/2SP, is recommended to protect the heater.

3.2.6.4 Brake Chopper

A brake chopper can be supplied for applications that
have a regenerative load. The brake chopper connects to a
brake resistor, which consumes the braking energy and
prevents an overvoltage fault on the DC bus. The brake
chopper is automatically activated when the DC bus
voltage exceeds a specified level, depending on the
nominal voltage of the frequency converter.

3.2.6.5 Mains Shield

The mains shield is a Lexan cover installed inside the
enclosure to provide protection according to VBG-4
accident-prevention requirements.

3.2.6.6 Ruggedized Printed Circuit Boards

Ruggedized boards are available for marine and other
applications that experience higher than average vibration.
NOTICE
Ruggedized boards are required to meet marine
approval requirements.

3.2.6.7 Heat Sink Access Panel

An optional heat sink access panel is available to facilitate
cleaning of the heat sink. Debris buildup is typical in
environments prone to airborne contaminants, such as the
textile industry.

3.2.6.8 Mains Disconnect

The disconnect option is available in both varieties of
option cabinets. The position of the disconnect changes
based on the size of the options cabinet and whether
other options are present. Table 3.19 provides more detail
about which disconnects are used.
Danfoss A/S © Rev. 06/2014 All rights reserved. MG20Z202