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Watson-Marlow Bredel E-Manuals
file://M:\staging\pdfs-global\m-521-cc-gb-03.htm
10 Varmeca drives
The Varmeca drive is an IP65 integrated electronically-variable speed drive fitted to a
standard enclosure IP55 motor gearbox. Standard Varmeca drives are single-phase but
three-phase Varmecas are available.
Standard Varmeca drives are set up for manual control with the run command enabled.
Current will be applied directly to the motor as soon as mains power is switched on.
Subsequently, speed, direction of rotation and stop control can be achieved from the control
knob and keypad.
For information on how to set up the Varmeca for remote control, please refer to
the Leroy Somer Varmeca-30 manual.
This Varmeca-30 must be connected to an approved earth terminal.
It is imperative that the equipment is powered via an isolating
device and a circuit-breaking device (power contactor) which can
be controlled by an external safety system (emergency stop, fault
detector).
The Varmeca-30 is fitted with safety devices which stop the motor in the event of a fault.
The motor can become jammed for mechanical reasons. Voltage fluctuations and power
cuts may also stop the motor.
Removing the cause of a shutdown can lead to restarting, which may be dangerous for
certain installations. It is essential that the user guards against the motor restarting after
shutdown, if this is undesirable.
10.1 Varmeca drives: installation
The standard Varmeca integrated drive requires no connection other than to the mains
power supply.
The Varmeca motor fan cools the whole unit. Make sure that the ventilation air inlet is
free of obstruction.
It is the responsibility of the owner or user to ensure that the installation, operation and
maintenance of the inverter complies with health and safety regulations of the relevant
country of use.
Before carrying out any work, disconnect and lock the drive power
supply. For single phase units, wait two minutes to make sure that
the capacitors have fully discharged. After connection work, make
sure that the seals are firmly in place, and the screws and cable
glands are watertight to ensure IP65 protection. Clear any
condensation from the drain holes at the bottom of the motor.
10.2 Varmeca drives: connections
The voltages on the power terminal blocks and the cables connected to them may cause
fatal electric shocks. The drive stop function does not protect against these high
voltages.
The drive power supply must be protected against overloads and short circuits.
It is vital to respect the rating of protection devices.
Connections should be made with copper conductors only.
Page 12 of 47
14/12/2009
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