3.7.2 Wall Mounting
When mounting on a flat wall, no back plate is required.
When mounting on an uneven wall, use a backplate to
ensure sufficient cooling air over the heat sink. Use the
backplate with enclosures A4, A5, B1, B2, C1, and C2 only.
130BA219.11
1
1
Backplate
Illustration 3.29 Mounting with Backplate
For frequency converters with protection rating IP66, use a
fibre or nylon washer to protect the epoxy coating.
130BA392.11
2
1
3
4
1
Backplate
2
Frequency converter with IP66 enclosure
3
Backplate
4
Fibre washer
Illustration 3.30 Mounting with Backplate for Protection Rating
IP66
3.7.3 Access
To plan accessibility for cabling before mounting, refer to
the drawings in
chapter 8.1 Mains Connection Drawings
and
chapter 8.2 Motor Connection Drawings
.
3.8 Options and Accessories
Options
For ordering numbers, see
Mains shielding
•
Lexan
®
shielding mounted in front of incoming
power terminals and input plate to protect from
contact when the enclosure door is open.
RFI filters
•
Frequency converter feature integrated Class A2
RFI filters as standard. If more levels of RFI/EMC
protection are required, they can be obtained
using optional Class A1 RFI filters, which provide
suppression of radio frequency interference and
electromagnetic radiation in accordance with EN
55011.
Residual current device (RCD)
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 setpoint) and a main
alarm setpoint. Associated with each setpoint is an SPDT
alarm relay for external use, which requires an external
window-type
current transformer (supplied and installed by
the customer).
•
Integrated into the frequency converter’s safe
torque off circuit.
•
IEC 60755 Type B device monitors 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.
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 1 insulation resistance monitor can be connected to
each ungrounded (IT) system.
•
Integrated into the frequency converter’s safe
torque off circuit.
•
LCD display of insulation resistance.
•
Fault memory.
System Integration
Design Guide
MG16G202
Danfoss A/S © 08/2015 All rights reserved.
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