Installing The Panel Options; Panel Options - Danfoss vlt series Operating Instructions Manual

How to Install

3.3 Installing the Panel Options

3.3.1 Panel Options

Space heaters and thermostat
3 3 Space heaters are mounted on the cabinet interior of
enclosure size F10–F15 frequency converters. They are
controlled via an automatic thermostat, and help control
humidity inside the enclosure, by that extending the
lifetime of frequency converter 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
F10–F15 frequency converters increases visibility during
servicing and maintenance.
The housing light includes a power outlet for temporarily
powering tools or other devices, available in 2 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 with power outlet, and/or the space
heaters and thermostat are installed, transformer T1
requires the taps to be set to the proper input voltage. A
380–480/500 V unit is initially set to the 525 V tap and a
525–690 V unit is set to the 690 V tap. This initial setting
ensures that no overvoltage of secondary equipment
occurs if the tap is not changed before power is applied.
To set the proper tap at terminal T1, located in the rectifier
cabinet, see Table 3.9. For location in the frequency
converter, see the illustration of the rectifier in
Illustration 3.32.
Input voltage range [V]
380–440
441–490
491–550
551–625
626–660
661–690
Table 3.9 Transformer Tap Setting
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
frequency converter input and output terminals. This
selection requires a VLT
®
and a VLT Extended Relay Card MCB 113.
34
®
VLT AutomationDrive FC 302
Tap to select [V]
400
460
525
575
660
690
®
PTC Thermistor Card MCB 112
Danfoss A/S © 04/2016 All rights reserved.
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
prewarning (50% of main alarm setpoint) and a main alarm
setpoint. Associated with each setpoint is an SPDT alarm
relay for external use. Requires an external window-type
current transformer (not supplied).
•
Integrated into the frequency converter'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 key.
IRM (insulation resistance monitor)
Monitors the insulation resistance in ungrounded systems
(IT systems in IEC terminology) between the system phase
conductors and ground. There is an ohmic prewarning and
a main alarm setpoint for the insulation level. Associated
with each setpoint is an SPDT alarm relay for external use.
NOTICE
Only 1 insulation resistance monitor can be connected to
each ungrounded (IT) system.
•
Integrated into the frequency converter's safe-
stop circuit.
•
LCD display of the ohmic value of the insulation
resistance.
•
Fault memory.
•
[Info], [Test], and [Reset] keys
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
frequency converter is off. Up to 2 starters are allowed
(only 1 if a 30 A, fuse-protected circuit is ordered).
The manual motor starter is integrated into the frequency
converter's STO and includes the following features:
•
Operation switch (on/off).
•
Short circuit and overload protection with test
function.
•
Manual reset function.
MG34Q402