Unidrive M400 Quick Start Guide 17
Issue Number: 8
4.3.1 Use of residual current device (RCD)
There are three common types of ELCB / RCD:
1. AC - detects AC fault currents
2. A - detects AC and pulsating DC fault currents (provided the DC current reaches zero at least
once every half cycle)
3. B - detects AC, pulsating DC and smooth DC fault currents
• Type AC should never be used with drives.
• Type A can only be used with single phase drives
• Type B must be used with three phase drives
If an external EMC filter is used with an ELCB / RCD, a delay of at least 50 ms should be
incorporated to ensure spurious trips are not seen. The leakage current is likely to exceed the trip
level if all of the phases are not energized simultaneously.
4.4 Control terminal configurations and wiring
The setting of Pr 00.005 automatically sets the drive configuration
Action will only occur if the drive is inactive and no User Actions are running. Otherwise, the
parameter will return to its pre altered value on exit from edit mode. All parameters are saved if this
parameter changes.
Only type B ELCB / RCD are suitable for use with 3 phase inverter drives.
00.005 Drive Configuration
RW Txt PT US
OL
AV (0), AI (1), AV Preset (2),
AI Preset (3), Preset (4),
Keypad (5), Keypad Ref (6),
Electronic Pot (7),
Torque Control (8), Pid Control (9)
AV (0)
RFC-A
Value Text Description
0AV
Analog input 1 (voltage) or Analog input 2 (voltage) selected by
terminal (Local/Remote)
1AI
Analog input 1 (current) or Analog input 2 (voltage) selected by
terminal (Local/Remote)
2AV Preset
Analog input 1 (voltage) or 3 presets selected by terminal
3AI Preset
Analog input 1 (current) or 3 presets selected by terminal
4Preset
Four presets selected by terminal
5Keypad
Keypad reference
6 Keypad Ref
Keypad reference with terminal control
7 Electronic Pot
Electronic Potentiometer
8 Torque Control
Torque mode, Analog input 1 (current frequency reference) or
Analog input 2 (voltage torque reference) selected by terminal
9 Pid Control
PID mode, Analog input 1 (current feedback source) and Analog
input 2 (voltage reference source)
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