C&H Technology PhMKP-DW User Manual

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PhMKP.../...-DW

Vishay ESTA

ESTAprop/ESTAdry Power Factor Correction

Capacitors Low Voltage

DW-TYPE FILTER CAPACITORS/IMPREGNATED OR DRY/RESIN-FILLED DESIGN

APPLICATION

ESTAprop DW-type capacitors in rectangular steel casing
have been designed for high current filter circuit applications
in low voltage plants. Loads such as frequency drives,
converters, and other nonlinear loads create harmonics. The
purpose of tuned and detuned filters is the protection of
electrical equipment and reduction of harmonics. DW-type
capacitors have an excellent current-carrying capability and
may be built for high voltages as well as high loads within one
casing.

DW-type capacitors may be used for:

• fixed detuned Power Factor Correction Equipment

• automatic detuned Power Factor Correction Equipment

• tuned filter circuits

DESIGN

The DW-type capacitor is based on MKP-technology. The
active element consists of metallized polypropylene film with
self-healing properties. The current-carrying metal layer is
vaporised onto one side of the polypropylene film. The front
surface of tubular winding elements are joined by means of
the metal spray method (Schooping). A number of elements
will be connected together to get the required capacitance.
The entire winding package will be incorporated within a
welded stainless steel casing.

The casing is fitted with hermetically sealed bushings M12,
for connection of the supply cable.

A threaded stud M10 for grounding is provided. Easy
mounting will be ensured by 4 drillings, Ø 9.8 mm, at the
bottom of the container, or by side-brackets.

This design ensures the highest safety by self-healing
technology as well as by an over pressure monitoring device.
In case of an internal failure, an over pressure may occur and
operate a potential-free contact, which will (connected to a
switching device like a contactor) disconnect the capacitor
from the suppy and thus protect the capacitor from bursting.

DW-TYPE CAPACITOR,
IP00, 6 TERMINALS

DW-TYPE CAPACITOR,
IP00, 3 TERMINALS

www.vishay.com Document Number: 13006
24 Revision: 10-Apr-06