3.4.12 Installation of E Load Share Option
The load share option can be installed on enclosure size
E2.
Ordering information
•
Enclosure type E1/E2: 176F1843
3.5 Enclosure Type F Panel Options
3.5.1 Enclosure Type F Options
Space heaters and thermostat
Mounted on the cabinet interior of enclosure size F
adjustable frequency drives, space heaters controlled via
automatic thermostat help control humidity inside the
enclosure. This control extends the lifetime of adjustable
frequency drive 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
A light mounted on the cabinet interior of enclosure size F
adjustable frequency drives increases visibility during
servicing and maintenance. The housing light includes a
power outlet, which temporarily powers tools or other
devices, available in two voltages:
•
230 V, 50 Hz, 2.5 A, CE/ENEC
•
120 V, 60 Hz, 5 A, UL/cUL
Transformer tap set-up
If the cabinet light and outlet and/or the space heaters
and thermostat are installed, transformer T1 requires its
taps to be set to the proper input voltage. 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. This setting ensures that no overvoltage of
secondary equipment occurs if the tap is not changed
before power is applied. See
to set the proper
tap at terminal T1 located in the rectifier cabinet. For
location in the adjustable frequency drive, see
.
Input voltage range [V]
Tap to select
380–440
400 V
441–490
460 V
491–550
525 V
551–625
575 V
626–660
660 V
661–690
690 V
Table 3.12 Setting of Transformer Tap
NAMUR terminals
NAMUR is an international association of automation
technology-users in the process industries, primarily
chemical and pharmaceutical industries in Germany.
Selecting this option provides terminals organized and
labeled to the specifications of the NAMUR standard for
adjustable frequency drive input and output terminals. This
requires VLT PTC Thermistor Card MCB 112 and VLT
Extended Relay Card MCB 113.
RCD (residual current device)
To monitor ground fault currents in grounded and high-
resistance grounded systems (TN and TT systems in IEC
terminology), use the core balance method. There is a pre-
warning (50% of main alarm setpoint) and a main alarm
setpoint. Associated with each setpoint is an SPDT alarm
relay for external use. It requires an external “window-type”
current transformer (supplied and installed by customer).
•
Integrated into the adjustable frequency 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 setpoint.
•
Fault memory.
•
[TEST/RESET].
IRM (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 setpoint for the insulation
level. Associated with each setpoint is an SPDT alarm relay
for external use.
NOTICE!
Only one insulation resistance monitor can be connected
to each ungrounded (IT) system.
•
Integrated into the adjustable frequency drive’s
safe-stop circuit.
•
LCD display of the ohmic value of the insulation
resistance.
•
Fault memory.
•
[INFO], [TEST], and [RESET].
IEC emergency stop with Pilz safety relay
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 adjustable frequency drive’s safe-stop circuit
and the line power contactor located in the options
cabinet.
Mechanical Installation
Instruction Manual
MG11F522
Danfoss A/S © 08/2014 All rights reserved.
37
3
3
Summary of Contents for VLT HVAC Drive FC 102
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