Heatsink Access Panel; Line Power Disconnect; Contactor; Circuit Breaker - Danfoss VLT AutomationDrive FC 300 Design Manual

Options and Accessories

9.12.1.7 Heatsink Access Panel

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

9.12.1.8 Line Power Disconnect

A line power disconnect can be supplied when a local
method of disconnecting the adjustable frequency drive
from line power 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 adjustable frequency drive from line
power is desired. A customer-supplied 230 V AC 50/60 Hz
signal is used to power the contactor.
NOTICE!
When UL listing is required and the adjustable frequency
drive is supplied with a contactor, the customer must
provide external fusing to maintain both the unit's UL
rating and the short circuit current rating of 100,000 A.
See chapter 7.2 Fuses and Circuit Breakers for fuse
recommendations.

9.12.1.10 Circuit Breaker

A circuit breaker can be supplied when overcurrent
protection via a circuit breaker is desired.

9.12.2 Frame Size F Options

Space Heaters and Thermostat
Mounted on the cabinet interior of frame size F adjustable
frequency drives, space heaters controlled via an automatic
thermostat help control humidity inside the enclosure,
prolonging component life in damp environments. The
thermostat default settings turn on the heaters at 10 °C
(50 °F) and turn them off at 15.6 °C (60 °F).
MG34S222
Design Guide
Cabinet light with power outlet
A light mounted on the cabinet interior of frame size F
adjustable frequency drives increases visibility during
servicing and maintenance. The housing includes a power
outlet for temporarily powering tools or other devices. The
power outlet is available in two voltages:
•
•
Transformer tap set-up
Transformer T1 requires that taps be set to the proper
input voltage if any of the following options are installed:
•
•
A 380–480/500 V adjustable frequency drive is initially set
to the 525 V tap and a 525–690 V adjustable frequency
drive is set to the 690 V tap to ensure no overvoltage of
secondary equipment occurs if the tap is not changed
before power is applied. See Table 9.6 to set the proper
tap on TB3 located in the rectifier cabinet. For location in
the adjustable frequency drive, see chapter 7.1.2 Power
Connections.
Input voltage range [V]
380–440
441–490
491–550
551–625
626–660
661–690
Table 9.6 Transformer tap
NAMUR terminals
NAMUR is an international association of automation
technology users in process industries, primarily in the
chemical and pharmaceutical industries, in Germany.
Selection of this option provides terminals organized and
labelled to the specifications of the NAMUR standard for
drive input and output terminals, which requires an MCB
112PTC thermistor card and anMCB 113 extended relay
card.
Residual current device (RCD)
Uses the core balance method to monitor ground fault
currents in grounded and high-resistance grounded
systems (TN and TT systems in IEC terminology). There is a
pre-warning (50% of main alarm setpoint) and a main
alarm setpoint. Each setpoint is associated with an SPDT
alarm relay for external use. The RCD requires an external
"window-type" current transformer, which is supplied and
installed by the customer. Features include:
Danfoss A/S © Rev. 2014-02-10 All rights reserved.
230 V, 50 Hz, 2.5A, CE/ENEC
120 V, 60 Hz, 5A, UL/cUL
Space heaters and thermostat
Cabinet light with power outlet
Tap to select [V]
400
460
525
575
660
690
9 9
265