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Communications Diagnostics Technical data

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Commander S100 User Guide

4.5 Supply requirements

Voltage:
100 V drive: 100 V to 120 V ±10 %
200 V drive: 200 V to 240 V ±10 %
400 V drive: 380 V to 480 V ±10 %
Maximum supply imbalance: 2 % negative phase sequence (equivalent to 3 % voltage imbalance between phases). Frequency range: 45 to 66 Hz
For UL compliance only, the maximum supply symmetrical fault current must be limited to 5 kA

4.5.1 Supply types

All drives are suitable for use on any supply type i.e TN-S, TN-C-S, TT and IT except 480 V grounded delta.
Drives are suitable for use on supplies of overvoltage category III and lower, according to IEC/EN/KN/UL 61800-5-1. This means they may be
connected permanently to the supply at its origin in a building, but for outdoor installation additional over-voltage suppression (transient voltage surge
suppression) must be provided to reduce category IV to category III.

4.5.2 Supplies requiring line reactors

Supply line reactors reduce the risk of damage to the drive resulting from poor phase balance or severe disturbances on the supply network.
Severe disturbances may be caused by the following factors, for example:
•

Power factor correction equipment connected close to the drive.

•

Large D.C. drives having no, or inadequate line reactors connected to the supply.

•

Across the line (DOL) started motor(s) connected to the supply such that when any of these motors are started, the voltage dip exceeds 20 %.

Such disturbances may cause excessive peak currents to flow in the input power circuit of the drive. This may cause nuisance errors, or in extreme
cases, failure of the drive.

4.5.3 Line reactor selection

If required, each drive must have its own reactor(s). Three individual reactors or a single three phase reactor should be used.

Reactor current ratings

The current rating of the line reactors should be as follows:
Continuous current rating:
•

Not less than the continuous input current rating of the drive

Repetitive peak current rating:
•

Not less than twice the continuous input current rating of the drive

For all drive ratings, 2 % line reactors permit drives to be used with a supply unbalance of up to 3.5 % negative phase sequence (equivalent to 5 %
voltage imbalance between phases). Higher values may be used if necessary but may result in a loss of drive output (reduced torque at high speed)
because of the voltage drop.

Table 4-7 Line reactor rating for 100 V drives

Operation with IT (ungrounded) supplies:

Special attention is required when using internal or external EMC filters with ungrounded supplies, because in the event of a ground
(earth) fault in the motor, the drive may not produce an error and the filter could be over-stressed. In this case, either the filter must not be
used i.e. removed, or additional independent motor ground fault protection must be provided. For instructions on removal, refer to
Figure 4-13

Disconnecting the internal EMC filter

. For details of ground fault protection contact the supplier of the drive.

A ground fault in the supply has no effect on the drive. If the motor must continue to run with a ground fault in its own circuit then an input
isolating transformer must be provided and if an EMC filter is required it must be located in the primary circuit. Unusual hazards can occur
on ungrounded supplies with more than one source, for example on ships. Contact the supplier of the drive for more information.

WARNING

Model Number

Power rating

Supply phases

Continuous

supply

current

Minimum line

reactor

inductance

Control

Techniques part