SINUS PENTA
GUIDE TO THE
REGENERATIVE APPLICATION
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3. INSTALLATION
INSTRUCTIONS
3.1.
Overview
The drives of the SINUS PENTA series can be used as regenerative feeders.
The Penta becomes a feeder absorbing or delivering sinusoidal current to the grid with a unitary power
factor; it is called a regenerative feeder because a bidirectional power flow can be obtained. The
regenerative feeder has a DC link output which is used for the power supply of one or more Elettronica
Santerno inverters through the DC-bus terminals.
The following benefits can be obtained:
- Absorption from the current mains with weak harmonic currents and unitary power factor;
- Recovery of the kinetic energy of the connected motor(s) during the braking stage (thus avoiding using
braking resistors, which also cause overheating);
- Possibility of controlling connected motors having greater voltage ratings than the mains voltage (see
Motors Having a Different Supply Voltage than the Mains Supply Voltage).
The following pages explain how drives can be connected to the mains; current waveforms and harmonic
currents are also given. As you will see, the Penta used as a regenerative drive allows obtaining great
benefits.
NOTE
Current harmonics depend both on mains voltage distortion (the weaker the
distortion, the weaker the current harmonics) and on drive power ratings (rated
power ensures the best harmonic currents percentage).
