Film Capacitors – Power Factor Correction

B25671A4187A375

PoleCap capacitor

MKK440-D-11.2-P

FK PC PM PFC

June 2009

Please read Cautions and warnings and

Page 6 of 8

Important notes at the end of this document.

Overpressure disconnector

To ensure full functionality of an overpressure disconnector, the following must be observed:

1. The elastic elements must not be hindered, i.e.



Connecting lines must be flexible leads (cables).



There must be sufficient space (min. 12 mm) for expansion above the connections. This will

enable a longitudinal extension of the can to secure the overpressure disconnector work.



Folding beads must not be retained by clamps.

2. The maximum allowed fault current of 10000 A in accordance with UL 810 standard must be

assured by the application.

3. Stress parameters of the capacitor must be within the IEC60831 specification.

Resonance cases

Resonance cases must be avoided by appropriate application design in any case. Maximum total

RMS capacitor current (incl. fundamental harmonic current) specified in technical data must not be

exceeded.

Re-switching vs. phase-opposition

In case of voltage interruption, a sufficient discharge time has to be ensured to avoid phase-

Vibration resistance

The resistance to vibration of capacitors corresponds to IEC 68, part 2–6.

Max. test conditions:

Test duration

6 h*

Frequency range 1

10 ... 55 Hz*

Displacement amplitude

0.75 mm*

*corresponding to max. 98.1 m/s or 10 g

These figures apply to the capacitor alone. Because the fixing and the terminals may influence the

vibration properties, it is necessary to check stability when a capacitor is built in and exposed to

vibration. Irrespective of this, you are advised not to locate capacitors where vibration amplitude

reaches the maximum in strongly vibrating equipment.

Mechanical protection

The capacitor has to be installed in a way that mechanical damages and dents in the aluminum can

are avoided.

Grounding

The threaded bottom stud of the capacitor has to be used for grounding. In case grounding is done

via metal chassis that the capacitor is mounted to, the layer of varnish beneath the washer and nut

should be removed. The maximum tightening torque is 10 Nm.