BOGE Operating instructions for C 15 series screw compressors Page 33
Installation 3.4 Electrical connection
Drive with frequency converter
Never omit a single safety step! Otherwise, you will risk injuries due to restart-
ing, electric shock or self-releasing parts.
Caution: Voltage!
According to operational conditions electrical drive systems with frequency
converter may have an earth leakage current above 10 mA.
Therefore the required precautions have to be applied as soon as the com-
pressor is electrically connected.
A permanently installed connection is required.
One or several of the following qualifications for the protective-conductor
system have to be fulfilled:
1. The protective conductor must have a minimum cross section of 10 mm
2
Cu along its total length.
2. If the protective conductor has a minimum cross section of less than
10 mm
2
Cu a second conductor with at least the same cross section has
to be provided up to the point from where the protective conductor has a
minimum cross section of more than 10 mm
2
.
3. Automatic interruption of the supply if the continuity of the protective con-
ductor is lost.
Please observe any additional national and local rules and regulations!
WARNING: Risk of injury!
Prior to any work on the compressor:
– Press Emergency Stop button, open mains disconnecting device and
secure with lock out tag out.
– Check to ensure that all conducting machine parts are voltage free.
– Depressurize all areas under pressure.
WARNING!
When the automatic restart (Auto-Restart) is activated, the compressor will
start automatically following a power loss.
Prerequisite: The net pressure is lower than the set switch-on pressure.
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