3.6
Electrical System (1-phase mains)
If you do not operate a 1-phase mains machine, please disregard this section.
Dumpmasters powered by 1-phase mains electricity are generally the same as other models,
but use a Variable Speed Drive (VSD) to drive a 3-phase 2-pole electric motor, which drives
the hydraulic pump. A transformer provides 24VDC current to the control systems.
The motor only runs when the RAISE button is pressed; the cradle is lowered by gravity alone.
3.6.1
International conformance
The exact specifications of 1-phase machines differ depending on the standard voltage and
frequency of 1-phase mains power in the intended country of use. Both the transformer
(
) are specified to suit regional norms.
A list of 1-phase power standards in different countries and territories may be viewed
here:
https://www.worldstandards.eu/electricity/plug-voltage-by-country/
Connecting the Dumpmaster to a power supply for which it is not designed may
damage the motor and other components. Consult an electrician if you are unsure.
3.6.2
Appliance inlet
The Dumpmaster is fitted with an IP66-rated appliance inlet, allowing it to be operated with a
regular 1-phase extension lead.
3.6.3
Isolator switch
The Dumpmaster is fitted with an isolator 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 isolator switch must be turned OFF before the powerpack cover is removed.
3.6.4
Transformer
The Dumpmaster is fitted with a transformer which outputs 24VDC current to the control
systems. The input voltage and frequency are specified to suit standard 1-phase mains
power in the intended country of use.
3.6.5
Variable Speed Drive
The Dumpmaster is fitted with an electronic Variable Speed Drive (VSD), which outputs 3-
phase/400VAC/50Hz current to the electric
motor in ‘star configuration’.
The input voltage
and frequency are specified to suit 1-phase mains power in the intended country of use.
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.
The VSD can be fitted with a joystick controller to provide progressive control over the
lifting speed (see
Residual voltages may be retained in the VSD after it has been disconnected from the
power supply. Use extreme caution when servicing all electrical components.
Summary of Contents for DUMPMASTER DM0700
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