Simpro Dumpmaster, User Manual

Page: 36 / 60

5.6 Electrical System (1-phase mains)
If you do not operate a 1-phase mains machine, please disregard this section.
Machines powered by 1-phase mains electricity are generally the same as other models, but
are fitted with an electronic Variable Speed Drive (VSD), which operates a 3-phase 2-pole
electric motor driving the hydraulic pump. The control voltage is 24VDC.
The motor only runs when the RAISE button is pressed; the cradle is lowered by gravity alone.
5.6.1 Localisation
The exact specifications of 1-phase machines differ depending on the standard voltage and
frequency of 1-phase mains power in the country for which the machine was designed. Both
the transformer (
Section 5.6.4 ) and the VSD ( Section 5.6.5 ) are specified to suit local norms.
A list of 1-phase power standards used in different countries and territories may be viewed at
this web address:
https://www.worldstandards.eu/electricity/plug-voltage-by-country/ .
Connecting the machine to a power supply for which it was not designed may cause
serious damage. Consult an electrician if you are unsure.
5.6.2 Appliance socket
1-phase machines are fitted with an IP66-rated appliance socket, allowing them to be
operated with a regular 1-phase extension lead.
5.6.3 Lockout switch
1-phase machines are fitted with a lockout switch on the forward side of the powerpack
cover. This isolates the electrical systems from the power supply and should be turned OFF if
the machine is to be placed in storage, or if the powerpack cover needs to be removed.
The lockout switch must be turned OFF before removing the powerpack cover.
5.6.4 Transformer
1-phase machines are fitted with a transformer which outputs 24vdc current to the control
systems. The transformer input voltage and frequency depend on the standard 1-phase
mains power in the country for which the machine was designed.
5.6.5 Variable Speed Drive
1-phase machines are fitted with an electronic Variable Speed Drive (VSD), which outputs 3-
phase/400VAC/50Hz current to the motor in
‘ star configuration’ . The VSD input voltage and
frequency depend on the standard 1-phase mains power in the country for which the
machine was designed.
The VSD has many parameters that can be set to suit specific applications. They can be
modified or calibrated by a PC that has the appropriate program and cable drivers loaded.
A joystick controller can optionally be supplied with the VSD, permitting infinitely-variable
control over the cradle lifting speed.
Residual voltages may be retained in the VSD inverter after it has been disconnected
from the power supply. Use extreme caution when servicing electrical components.