The self-healing capacitors in the PRT series consist of three single-phase elements made of wavy cut metallized polypropylene film at high gradient, treated under vacuum process, and then placed in a cylindrical casing of extruded aluminium along with resin and gas as filler.
The case has fixing stud M12 x 12 mm, that is used to earth the capacitor.
The capacitor is closed with the beading of the steel lid on the aluminium casing, ensuring perfect air and water tightness. The fibreglass-reinforced nylon strip is dielectrically assembled on the steel lid with an airtight fit.
The strip accommodates the three terminals and provides IP20 degree of protection. IP54 terminal and capacitor degree of protection cover is available upon request.
The capacitors are equipped with external discharge resistors, permanently connected for safety to the faston terminals of the capacitor strip.
All DPRT capacitors are equipped with the overpressure disconnector; in case of activation, the capacitor top lid bends and disconnect the internal electrical connection and smoothly separate the capacitor from the supply.
It is therefore recommended to leave at least 25 mm of clear space above the connecting strip to allow the overpressure device to work properly.
Especially suited fixed or automatic power-factor correction systems equipped with PFC controller.
If used in automatic power-factor correction system, the PFC regulator reconnecting time must be compatible with the capacitor discharge time (never less than 30 sec).
If shorter discharge times are required, it is necessary to use fast discharge resistors (available upon request), that enable the capacitor to discharge in just a few seconds.
Installation must be performed by fixing the M12 stud of the Capacitor.