Lenze 712 E.3B - Handbuch (Seite 41)

Preface and general information 1
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41 EDB712 DE/EN 2.1
1 Preface and general information
Using the voltage controller 712, the torque of three-phase asynchronous
motors with resistive rotor behaviour up to a power rating of 3.3 kVA can be
steplessly adjusted. The torque is modified by changing the slip using phase
control on the stator voltage.
This voltage controller complies with applicable EU directives and is suitable for
use in CE-compliant drive systems.
The following features and properties of this voltage controller make safe and
reliable motor operation possible:
A Compact two printed circuit board device with electrically floating cooling
plate
B Large setting range for the output voltage up to full mains voltage
C Not necessary to connect the star point or star neutral conductor for
setting ranges up to 1:20
D For winding applications there is a second setpoint input for connecting a
dancer potentiometer
E Two mains voltage ranges can be selected by simple reconfiguration
F Limited short-circuit protection
G Degree of protection IP 00

Note!
ƒ In the operating instructions the voltage controllers are referred
to as drive controllers.
ƒ Cross-references within the operating instructions are marked
with: (  )