Configuration
12.6 Installation altitude and ambient temperature
SIRIUS 3RW30 / 3RW40
94 Manual, 10/2018, NEB535199502000/RS-AB/005
Installation altitude and ambient temperature
Installation altitude
The permissible installation altitude must not be higher than 5000 m above sea level (higher
than 5000 m on request).
If the installation altitude exceeds 1000 m, the rated operational current must be reduced for
thermal reasons.
If the installation altitude exceeds 2000 m, the rated voltage must also be reduced owing to
the restricted dielectric strength. A maximum permissible rated voltage of 460 V applies at
installation altitudes between 2000 m and 5000 m above sea level.
The following diagram shows the reduction in the rated device current as a function of the
installation altitude:
The rated operational current I
e
must be reduced at altitudes higher than 1000 m above sea
level.
Figure 12-2 Reduction as a function of the installation altitude
The maximum permissible ambient temperature of the soft starter must not exceed 60 °C.
SIRIUS 3RW30 and 3RW40 soft starters are designed for operation with nominal current at
an ambient temperature of 40 °C. If this temperature is exceeded, e.g. owing to an
impermissible temperature rise in the control cabinet, other loads, or a general increase in
the ambient temperature, the resulting deterioration in the soft starter's performance must be
taken into account when the device is dimensioned (refer to chapter Technical data
(Page 127)).
The soft starter may be damaged if the maximum installation altitude (5000 m above sea
level) or an ambient temperature of 60 °C is ignored.
To Next Page
Loading...
