LV Capacitors

LV Capacitors

INTRODUCTION

The power factor correction system main component is capacitor on board: it is therefore important to choose it solid and of good quality. In our power factor correction systems we only use high quality capacitors.

The capacitors used are divided into two different types, which lead to electrical and thermal performance completely different.

High gradient metallized polypropylene capacitors

High gradient metallized polypropylene capacitors with increased tickness

High gradient metallized polypropylene capacitors

Temperature category Loss of capacitance  Voltage withstand Allowed current overload Peak current withstand Life expectancy at -25/D Life expectancy at climate category
 -25/D  low very good good very good 100.000h 100.000h

They are made by wrapping a metallized polypropylene film, refin filled.

The metallization thickness modulation allows to greatly improve the capacitors (and therefore of the power factor correction systems which are the fundamental component) in terms of:

  • Increase in power density (kvar/dm3) with a consequent power size reduction of the power factor correction systems;
  • Robustness improvement against voltage surges, for greater reliability even in systems with the presence of voltage fluctuations due to the network or maneuvers on the system;
  •  Improved behavior of the internal short circuit withstand.

High gradient metallized polypropylene capacitors with increased tickness

Temperature category Loss of capacitance  Voltage withstand Allowed current overload Peak current withstand Life expectancy at -25/D Life expectancy at climate category
-25/+70 °C negligible very good very good excellent 150.000h 100.000h

The main difference compared to standard polypropylene capacitors is the increased thickness of the polypropylene film that makes it more robust and durable.

The metallization thickness modulation allows to greatly improve the capacitors (and therefore of the power factor correction systems which are the fundamental component) in terms of:

  • Increase in power density (kvar/dm3) with a consequent power size reduction of the power factor correction systems;
  • Robustness improvement against voltage surges, for greater reliability even in systems with the presence of voltage fluctuations due to the network or maneuvers on the system;
  •  Improved behavior of the internal short circuit withstand.