Film capacitors – Power electronic capacitors

MKP PEC DC

B2562*

Preliminary data

FK PEC

June 2010

Page 4 of 10

.

Lowest operating temperature Θ

Θ

Θ

Lowest permitted ambient temperature at which a capacitor may be energized.

Maximum operating temperature Θ

Θ

Θ

Highest permitted capacitor temperature during operation, i.e. temperature at the hottest point of the

case.

Hot-spot temperature Θ

Θ

Θ

Temperature zone inside of the capacitor at hottest spot.

Tangent of the loss angle of a capacitor tan δ

δδδ

Ratio between the equivalent series resistance and the capacitive reactance of a capacitor at a

specified sinusoidal alternating voltage, frequency and temperature.

The sum of all Ohmic resistances occurring inside the capacitor.

The thermal resistance indicates by how many degrees the capacitor temperature at the hot spot

rises in relation to the dissipation losses.

Maximum permissible power dissipation for the capacitor’s operation.

th

A

hs

R

Θ

−

Θ

The sum of all inductive elements which are contained in a capacitor.

The lowest frequency at which the impedance of the capacitor becomes minimum.

R

self

C

L

2

1

⋅

⋅

π

Specifications and characteristics

Application:

The MKP DC series is designed for DC-link applications. Some typical examples of DC-Link

applications are as follows: converters, frequency drives, power conversion, uninterruptible power

supplies, transportation, wind power, solar power, power distribution, etc.