Danfoss VLT FC 102 Operating Instructions Manual page 41

Hvac low harmonic drive
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VLT HVAC Low Harmonic Drive Operating In-
structions
If the Cabinet Light & Outlet and/or the Space Heaters & Thermostat are installed Transformer T1 requires it taps to be set to the proper input voltage.
A 380-480/ 500 V380-480 V drive will initially be set to the 525 V tap and a 525-690 V drive will be set to the 690 V tap to insure no over-voltage of
secondary equipment occurs if the tap is not changed prior to power being applied. See the table below to set the proper tap at terminal T1 located in
the rectifier cabinet. For location in the drive, see illustration of rectifier in the
Input Voltage Range
380V-440V
441V-490V
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 organized and labeled to the specifications of the NAMUR standard for drive input and output
terminals. This 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 termi-
nology). 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. Requires an external "window-type" current transformer (supplied and installed by customer).
Integrated into the drive's safe-stop circuit
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 button
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 drive's safe-stop circuit
LCD display of the ohmic value of the insulation resistance
Fault Memory
INFO, TEST, and RESET buttons
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 in conjunction with the
drive's safe-stop circuit and the mains contactor located in the options cabinet.
Manual Motor Starters
Provide 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 drive is off. Up to two starters
are allowed (one if a 30A, fuse-protected circuit is ordered). Integrated into the drive's safe-stop circuit.
Unit features include:
Operation switch (on/off)
Short-circuit and overload protection with test function
Manual reset function
30 Ampere, 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 drive is off
Power for the fused protected terminals will be provided from the load side of any supplied contactor, circuit breaker, or disconnect switch.
24 VDC Power Supply
5 amp, 120 W, 24 VDC
Protected against output over-current, overload, short circuits, and over-temperature
Tap to Select
400V
460V
®
MG.16.A1.02 - VLT
is a registered Danfoss trademark
Power Connections section.
4 How to Install
4
41

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