Electrical Connection - Gardner Denver L Series Original User And Service Manual

5.4

Electrical Connection

Risk of strong damages and fire on the electric power components.
 The power supply to the compressor side has to be fitted for industrial equipment
and fulfilling the requirements of NFPA 79. Any kind of operation outside of the
stated limits of NFPA 79 is inadmissible.

The electrical connection should be made by a qualified electrician.
Electric shock
Dangerous and deadly electrical voltage
 Work on the electrical equipment may be performed only by specialized electrical
technicians.
 Only units with Variable Frequency Drives, there is a risk of electric shocks due to
charged capacitors! Isolate the compressor and wait 10 minutes before touching any
electrical parts.

Check the DC bus voltage.
If local regulations are stricter than the values given below, observe the stricter regulations.
If the electrical connection is made to a non-earthed three-phase system (IT network), please
see the corresponding notes in the included frequency converter documentation.
If a residual current device (RCD) is used to monitor the earthing connection in the system for
earth faults, to prevent interruptions only Type B devices (adjustable trip setting and delay)
may be used.
Disturbances in the electrical supply grid
Speed-controlled compressor system with variable speed drives can cause disturbances in low-voltage
grids. For this reason, this drive system is not intended for use on the public low-voltage grid that feeds
residential areas.
The compressor system is completely finished at the factory according to EN 60204 (Industrial
Machinery).

The power supply to the compressor must be suitable for industrial equipment and must meet all
requirements of EN60204-1/IEC60204-1. If the installation conditions deviate from the conditions as
described in EN 60204, consult Gardner Denver.

Provide the electrical connection and protective measures according to VDE, BS, or local
requirements. As a rule, additional regulations from the corresponding power company must also be
complied with.

A main switch must be fitted on-site upstream of the compressor (DIN EN 1012 - 1) insofar that such a
switch has not already been fitted in the factory as a special accessory. The main disconnect switch
must meet the requirements of the safety standard EN 60 204-1 (Electrical Equipment for Machinery)
and EN 60947-2 (Low Voltage Equipment).

The compressor must be protected by suitable line fuses according to EN 60269-1 (Low Voltage
Directive).

If other electrical circuits are run to the electronic controller afterward, such as lighting, heating, or the
like, that are not disconnected by the main disconnect switch, then these excepted electrical circuits
must be labeled and run separately per EN 60204. Warning labels must also be installed near the
main disconnect switch and near these circuits.

Should an electrical connection to an unearthed AC electrical circuit (IT network) be made, observe
the instructions in the supplied documentation of the frequency converter (only RS compressors).
DANGER
DANGER
WARNING
NOTICE
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