Danfoss VLT AQUA Drive FC 202 Design Manual page 72

Selection
extending the lifetime of components 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
3 3
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, available in
two voltages:
•
230 V, 50 Hz, 2.5A, CE/ENEC
•
120 V, 60 Hz, 5A, UL/cUL
Transformer Tap Setup
If the cabinet light & outlet and/or the space heaters &
thermostat are installed, Transformer T1 requires that taps
be set to the proper input voltage. 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 3.37 to set the proper tap on TB3 located in the
rectifier cabinet. For location in the frequency converter,
see 5.4.2 Power Connections.
Input voltage range [V]
380-440
441-490
491-550
551-625
626-660
661-690
Table 3.37 Transformer Tap
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 MCB 112
PTC thermistor card and MCB 113 extended relay card.
RCD (Residual Current Device)
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. Associated with each set-point is an SPDT
alarm relay for external use. The RCD requires an external
"window-type" current transformer (supplied and installed
by the customer).
•
Integrated into the safe-stop circuit of the
frequency converter
•
IEC 60755 Type B device monitors AC, pulsed DC,
and pure DC ground fault currents
70
®
VLT AQUA Drive FC 202 Design Guide
Tap to select [V]
400
460
525
575
660
690
®
MG20Z102 - VLT is a registered Danfoss trademark
•
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.
Associated with each set-point is an SPDT alarm relay for
external use.
NOTE
Only one insulation resistance monitor can be connected
to each ungrounded (IT) system.
•
Integrated into the safe-stop 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 4-wire emergency-stop push button
mounted on the front of the enclosure and a Pilz relay that
monitors it with the safe-stop circuit and the mains
contactor located in the options cabinet.
Safe Stop + Pilz Relay
Provides a solution for the "Emergency Stop" option
without the contactor in F-Frame frequency converters.
Manual Motor Starters
Provides 3-phase power for electric blowers often required
for larger motors. Power for the starters is provided from
the load side of any supplied contactor, circuit breaker, or
disconnect switch. Power is fused before each motor
starter, and is off when the incoming power to the
frequency converter is off. Up to two starters are allowed
(one if a 30 A, fuse-protected circuit is ordered) and are
integrated into the safe-stop circuit.
Unit features include:
•
Operation switch (on/off)
•
Short-circuit and overload protection with test
function
•
Manual reset function
30 A, Fuse-Protected Terminals
•
3-phase power matching incoming mains voltage
for powering auxiliary customer equipment
•
Not available if two manual motor starters are
selected
•
Terminals are off when the incoming power to
the frequency converter is off