Film capacitors – Power Factor Correction
PhaseCap capacitors
B25668A7996A375
MKK800-D-20-11
Mechanical protection
The capacitor has to be installed in a way that mechanical damages and dents in the aluminium 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.
Maintenance
.
.
Check tightness of the connections/terminals periodically.
Take current reading twice a year and compare with nominal current. Use a harmonic analyser or
true effective RMS-meter.
.
.
In case of current above the nominal current check your application for modifications.
If a significant increase in the amount of non-linear loads has been detected, then a consultant
has to be called in for a harmonic study.
.
.
In case of the presence of harmonics installation of a de-tuned capacitor bank (reactors) must be
considered.
Check the discharge resistors/reactors and in case of doubt, check their function:
(1) Power the capacitor up and down.
(2) After 90 seconds the voltage between the terminals must decline to less than 75 V.
.
Check the temperature of capacitors directly after operation for a longer period, but make sure
that the capacitors have been switched off. In case of excessive temperature of individual
capacitors, it is recommended to replace these capacitors, as this should be an indication for loss
factor increase, which is a sign for reaching end of life.
Storage and operating conditions
Do not use or store capacitors in corrosive atmosphere, especially where chloride gas, sulfide gas,
acid, alkali, salt or the like are present. In dusty environments regular maintenance and cleaning
especially of the terminals is required to avoid conductive path between phases and/or phases and
ground.
Note
For detailed information about PFC capacitors and cautions, refer to the latest version of EPCOS PFC
Product Profile.
Important: Please note that the „General Safety Recommendations for Power Capacitors“ by ZVEI
(German Electrical and Electronic Manufacturers´ Association (ZVEI) have to be observed in addition
to the caution guidelines stated in the data sheet (Internet: www.epcos.com/pfc).
FK PC PM PFC
June 2009
Please read Cautions and warnings and
Important notes at the end of this document.
Page 7 of 8
EPCOS [ EPCOS ]
