Commander SE User Guide
Issue Number 5
13
Braking Resistors - High Temperatures
Braking resistors can reach high temperatures. Locate braking resistors so
that damage cannot result. Use cable having insulation capable of
withstanding high temperatures.
Braking Resistors - Overload Protection
It is essential that an overload protection device is incorporated in the
braking resistor circuit. This is described in section 5.1.1 Thermal
Protection Circuit for an Optional Braking Resistor.
3.1.1 *Input current
The input current values given could be exceeded where the supply fault current is
greater than 5kA or the phase voltages are not balanced. In these cases, input line
reactors are recommended. See section 4.4.3.
3.1.2 **Temperature effects on inrush currents
Due to the design of the inrush circuit, the inrush current will be lower on the first power
up of the Drive after a period of non-use and when the Drive is cold. The inrush current
will increase when the time between power ups is short and the internal ambient
temperature within the Drive is high.
3.2
General data
IP Rating
.
If the Drive is not mounted in this way, hazardous live parts will be exposed
and the IP Rating of the Drive will be invalid.
WARNING
WARNING
Size 1:
Sizes 2, 3 & 4:
IP20
The Ingress Protection rating is applicable to the Drive
when the supplied rubber grommets are fitted into the
gland plate.
IP20
The Ingress Protection rating is applicable to the Drive
when the supplied rubber grommets are fitted into the
gland plate and the Drive is mounted on a solid flat
surface.
WARNING
Input phase
imbalance:
Phase imbalance not to exceed 2% negative phase
sequence
Ambient temperature: -10
°
C to +40
°
C (14
°
F to 104
°
F) at 6kHz switching
frequency
-10
°
C to +50
°
C (14
°
F to 122
°
F) at 3kHz switching
frequency with derating. See Commander SE
Advanced User Guide for Derating Curves.
Storage temperature: -40
°
C to +60
°
C (-40
°
F to 140
°
F) for 12 months
maximum.
Altitude:
Reduce the normal full-load current by 1% for every
100m (325ft) above 1000m (3250ft) to a maximum of
4000m (13000ft).
