Circuit Breaker; Frame Size F Options - Danfoss VLT AutomationDrive FC 300 Design Manual

Options and Accessories
NOTICE
When UL listing is required and the frequency converter
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
7.2 Fuses and Circuit Breakers for fuse recommendations.

9.12.1.10 Circuit Breaker

A circuit breaker can be supplied when over-current
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 frequency
converters, 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).
Cabinet light with power outlet
A light mounted on the cabinet interior of frame size F
frequency converters 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:
•
230 V, 50 Hz, 2.5A, CE/ENEC
•
120 V, 60 Hz, 5A, UL/cUL
Transformer tap setup
Transformer T1 requires that taps be set to the proper
input voltage if any of the following options are installed:
•
Space heaters and thermostat
•
Cabinet light with power outlet
A 380-480/500 V frequency converter is initially set to the
525 V tap and a 525–690 V frequency converter is set to
the 690 V tap to ensure no over-voltage 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
frequency converter, see 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
®
VLT AutomationDrive FC 300 Design Guide 90-1200 kW
Tap to select [V]
400
460
525
575
660
690
MG34S202 - Rev. 2013-08-19
NAMUR terminals
NAMUR is an international association of automation
technology users in the process industries, primarily
chemical and pharmaceutical industries in Germany.
Selection of this option provides terminals organised 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 set-point) and a main
alarm set-point. Each set-point 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:
•
Integrated into the Safe Torque Off circuit of the
frequency converter
•
IEC 60755 Type B device monitors AC, pulsed DC,
and pure DC ground fault currents
•
LED bar graph indicator of the ground fault
current level from 10–100% of the set-point
•
Fault memory
•
[Test/Reset] key
Insulation resistance monitor (IRM)
Monitors the insulation resistance in ungrounded systems
(IT systems in IEC terminology) between the system phase
conductors and ground. There is an ohmic pre-warning
and a main alarm set-point for the insulation level. Each
set-point is associated with an SPDT alarm relay for
external use.
NOTICE
Only one insulation resistance monitor can be
connected to each ungrounded (IT) system.
Features include:
•
Integrated into the Safe Torque Off circuit of the
frequency converter
•
LCD display of the ohmic value of the insulation
resistance
•
Fault Memory
•
[Info], [Test] and [Reset] keys
IEC emergency stop with Pilz safety relay
Includes a redundant four-wire emergency-stop push
button mounted on the front of the enclosure. A Pilz relay
monitors it with the Safe Torque Off circuit and the mains
contactor located in the options cabinet.
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