High Power Options; Frame Size D Options; Load Share Terminals; Regeneration Terminals - Danfoss VLT AutomationDrive FC 300 Design Manual

Options and Accessories
and the ripple current ΔI to the motor. This results in the
current and voltage becoming almost sinusoidal, which
reduces the acoustic motor noise.
The ripple current in the Sine-wave filter coils also causes
some noise. This problem can be solved integrating the
filter in a cabinet or similar enclosure.

9.12 High Power Options

Ordering numbers for high power options can be found in
5 How to Order.

9.12.1 Frame Size D Options

9.12.1.1 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 9.21
9 9
shows both the covered and uncovered terminals.
Illustration 9.21 Load Share or Regeneration Terminal with
Cover (Left) and without Cover (Right)

9.12.1.2 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 9.21 shows both the covered and
uncovered terminals.

9.12.1.3 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
238
®
VLT AutomationDrive FC 300 Design Guide 90-1200 kW
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.

9.12.1.4 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.

9.12.1.5 Mains Shield

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

9.12.1.6 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.

9.12.1.7 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.

9.12.1.8 Mains Disconnect

A mains disconnect can be supplied when a local method
of disconnecting the frequency converter from the mains is
desired. The location of the disconnect is based on the size
of the options cabinet and whether other options are
present.

9.12.1.9 Contactor

A contactor can be supplied when a remote method of
disconnecting the frequency converter from the mains is
desired. A customer-supplied 230 V AC 50/60 Hz signal is
used to power the contactor.
MG34S202 - Rev. 2013-08-19