Specifications

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 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. Requires an external “window-
type” current transformer (supplied and installed by the
customer).
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Integrated into the frequency converter safe
torque off 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
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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. An
SPDT alarm relay for external use is associate with each
setpoint.
NOTICE
Only one insulation resistance monitor can be
connected to each ungrounded (IT) system.
•
Integrated into the frequency converter safe
torque off 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 frequency converter
STO 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 30 A, fuse-
protected circuit is ordered), and are integrated into the
frequency converter STO 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 2 manual motor starters are
selected
•
Terminals are off when the incoming power to
the frequency converter is off
•
Power for the fused protected terminals will be
provided from the load side of any supplied
contactor, circuit breaker, or disconnect switch
In applications where the motor is used as a brake, energy
is generated in the motor and sent back into the
frequency converter. If the energy cannot be transported
back to the motor, it increases the voltage in the
frequency converter DC line. In applications with frequent
braking and/or high inertia loads, this increase may lead to
an overvoltage trip in the frequency converter and finally a
shut down. Brake resistors are used to dissipate the excess
energy resulting from the regenerative braking. The
resistor is selected based on its ohmic value, its power
dissipation rate and its physical size. Danfoss offers a wide
variety of different resistors that are specifically designed
for Danfoss frequency converters.
3.1.13 Remote Mounting Kit for LCP
When the frequency converter is inside a larger enclosure,
the LCP can be moved from a frequency converter inside
to the front of a cabinet using the remote mounting kit.
The LCP enclosure is IP66. Tighten fastening screws with a
torque of 1Nm., maximum.
Enclosure IP66 front
Max. cable length between LCP and unit
3 m
8 m for option
130B1129
Communication std RS-485
Table 3.14 Technical Data
Selection VLT® HVAC Drive FC 102 Design Guide
MG16C102 - Rev. 2013-08-20 59
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