12. Installation
12.1. Installation
The frequency inverters are designed for installation in a switchgear cabinet and for permanent
connection.
The inverter must be installed so that the heat sink is facing to the right . Only in this way natural
convection is guaranteed.
If the inverter has to be installed in a different position, external cooling is required for full capacity
utilization.
BERGES inverters are generally designed so that they can be operated at ambient temperatures from
−5 °C to +45 °C and at a relative humidity of up to 90%.
Formation of condensation must be avoided!
Please contact BERGES if the above values are exceeded. A heat build-up at the inverter during
operation must be prevented. The internal air circulation may possibly be insufficient if the unit is
installed in a control cabinet with a small volume.
The units should never be installed in the proximity of corrosive or flammable gases, conductive dust
or large magnetic and electric fields.
The inverter should be installed in a location that is largely free of dust, steam and vibrations.
Operation of the units in the presence of abrasive dust, steam, condensate, oil mist or air containing
salt will reduce their useful life.
Pay close attention during installation to ensuring that no objects (such as drilling swarf, wire or anything
else) fall into the unit. Otherwise a device fault cannot be excluded, even after longer periods of
operation.
12.2. Mains power connection
To guarantee lasting operating safety and reliability, the inverter must be connected expertly in
accordance with the valid electric standards. Attention must be paid to good insulation from earth
potential on the power terminals.
Connect an AC mains power supply with a rated voltage between 220V and 240V or a three phase
mains power supply with a rated voltage between 380V and 460V (40..70Hz) to the mains power
connection terminals L1, N or L1,L2,L3 and PE respectively. (TN-C System)
L1 (phase) -- N 220...240V 40...70 Hz; PE = Ground
L1, L2, L3 (phases) 380...415V (380...460V) 40...70 Hz; PE = Ground
Ensure a voltage balance to earth when feeding in the mains power through an isolating transformer
(star point earthed) or use the vector group ‘‘DY5’’ in the case of single-phase inverter power supply.
The inverter must always be earthed.
BERGES electronic
29.05.98 Operating manual ACM-D2 15
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