Service; Technical Data For Frequency Converter Vau - Becker VARIAIR VAU 4/2 Instructions De Service

4.3 Service

Regular maintenance
VARIAIR CONVERTERS are generally maintenance-free. Neverthe-
less it should be regularly checked whether
· a sufficient ventilation is guaranteed for the converter (radial and
axial air outlets at the motor ventilation)
· the cables in the PG screws are properly guided and held.
Repairs
The user must not repair the installation himself. In case of an error
the installation is to be replaced and to be passed to the responsible
Service department.
The VARIAIR CONVERTER connected to the power
supply carries dangerous voltage. The converter may only
be replaced by qualified staff.
When opening the terminal box the power supply must
be shut off. The terminals for the collective error message
(SSM) and the collective operating message (SBM) can
carry dangerous external voltages.
Before disconnecting the electrical connections it must be made sure
that they are without voltage.
Disregard for these rules can cause grave or fatal injuries.
After disconnecting the supply and control cables and removing the
cables from the PG screws the VARIAIR CONVERTER can be separa-
ted from the motor by releasing the 3 hexagon socket screws.
It must be kept in mind that the motor connecting line can
carry dangerous voltages due to the discharging time of
the intermediate circuit capacities.
The converter may only be separated from the motor 5
minutes after shutting off the three-phase network.
By slightly lifting the converter from the motor the five-pin plug is
accessible and can be disconnected without using tools.
Figure 9 Fixing of converter
Fastening screws

5.Technical data for frequency converter VAU

Type VAU 4/2
Motor output 4.0 kW
Output constant current 9.5 A
Input nominal current 13 A
Recommended mains fuse 16 A
Max. conductor cross-sections2.5 mm ²
Weight 3.9 kg
Cooling by motor fan
Output voltage three-phase, 380 V +/-10 %
Input voltage 400 V +/-10 % (standard) 480 V
+/-10 % (special parameterisation)
Output frequency 0 Hz - 100 Hz
Frequency resolution 0.1 Hz
Pulse repetition frequency 7.8 kHz
Temperature of cooling agent max.40 °C, free from humidity and
aggressive gases
Storing temperature -20 °C to +70 °C, free from humidity and
aggressive gases
Air moisture 90 %, without condensation
Installation height up to 1,000 m above M.S.L., without
loss of performance
System of protection IP 54
Electrical protection proof: grounding, short circuit, open cir-
cuit, protection against failure of network phase
Resistance to jamming according to EN 50082-2
Radio interference suppression rate according to EN 55011 class B
Approval UL and CSA in preparation
The frequency converter VAU 4/2 has an output of 4 kW with 9.5 A
and 400 V.
The dimensions are
A = 125 mm
B = 180 mm
C = 210 mm
The converter FU VAU 4/2 can be supplied for motors of the size
80 and 90.
Figure 10 Dimensions
B
C
A