Control Techniques Commander SE Series User Manual

Commander SE User Guide
Issue Number 5 23
The groundloop impedance must conform to the requirements of local safety
regulations. The ground connections must be inspected and tested at
appropriate intervals.
Earth and ground leakage
TheDrivehas a verysmallleakage currentbetween the power lines and ground,which
is of no consequence.
The RFI filter has a higher leakage current, data is given in section 4.5.4, Tables 4.11
to 4.14. When the standard and low cost filters are used, a permanent fixed ground
connection must be provided which does not pass through a connector or flexible
power cord.
Motor cables
For routine EMC precautions
Use either of the following:
• Cables containing three power conductors plus a ground conductor
• Three separate power conductors plus a ground conductor
For full EMC precautions, where required (see section 4.5.2)
Use shielded (screened) or steel-wire armoured cable having three power conductors
plus a ground conductor.
If the cable between the Drive and the motor is to be interrupted by a
contactor or circuit breaker, ensure that the Drive is disabled before the
contactor or circuit breaker is opened or closed. Severe arcing may occur if
this circuit is interrupted with the motor running at high current and low
speed.
Maximum motor cable lengths
The capacitive loading of the Drive by the motor cable means that the cable length
limitsshowninTable4.1mustbeobserved.Failuretodosocanresultinspurious
OI.AC tripping of the Drive. If longer cable lengths are required, consult your local
Drive Centre or Distributor.
Table 4.1 Maximum motor cable lengths
High Capacitance Cables
Most cables have an insulating jacket between the cores and the armour or shield;
these cables have a low capacitance and are recommended. Cables that do not have
aninsulatingjackettendtohavehighcapacitance.
If a high capacitance cable is used, the maximum cable lengths in Table 4.1 should be
halved.
For further information please refer to the Commander SE Advanced User Guide.
Multiple Motors
For advice on multiple motor applications where a number of small motors are
connected to the output of one Drive, please refer to the Commander SE Advanced
User Guide.
WARNING
WARNING
Drive Size Maximum motor cable length
Meters Feet
1 75 246
2 100 330
3 100 330
4 100 330

Control Techniques Commander SE Series Specifications

General

Brand	Control Techniques
Model	Commander SE Series
Category	Inverter
Language	English