TKF Knowledge base
The TKF Knowledge Base contains important guidelines, FAQs, product selection guides, sample reports, and calculators. Use these materials to support your planning, decision-making, and implementation.
Frequently Asked Questions
Here you will find answers to the most common questions about reactive power compensation, power quality, detuned capacitor banks, and spare parts. This is a list of our clients’ most common questions so you can quickly find help with everyday situations and potential issues.
If you cannot find the answer to your question or if you need more detailed expert assistance, TKF’s experts will be happy to help.
What spare parts are available?
All components, including those for devices from other manufacturers.
For example, capacitor units, reactors, contactors, fans, thermostats, and air filters.
Why is the compensation device making a strange noise?
The contactor heads have probably "welded" together, or the reactor is failing.
We recommend having the device serviced.
Why is the controller displaying an unusual power factor value?
Either the controller’s connection or set values are wrong.
We recommend verifying the voltage and current measurements for the connections. We also recommend checking the controller’s set values.
Why do the fuses in the detuned capacitor bank burn out?
There may be harmonic currents in the network, which cause the capacitor to draw more current than it normally would.
We recommend measuring the power quality on the site.
What causes harmonic currents, and how can they be eliminated?
There are several different sources of harmonic currents, but they are most commonly caused by frequency converters.
Harmonic currents can be filtered using passive and active filters. These solutions are always custom-designed to meet the specific requirements, so please contact TKF's sales department.
The electric network operator charges a reactive power fee. How can I get rid of this fee?
There are approximately 80 network operators in Finland, each with their own policies on billing for reactive power. In practice, you can avoid reactive power fees by purchasing a detuned capacitor bank. Please contact TKF Sales at myynti@tkf.fi to dimension the installation correctly. The detuned capacitor bank selection guide, which you can download here, can also help you understand the issue.
The display on my detuned capacitor bank says “Export”. What does this mean?
The current transformer is connected the wrong way around. Connect the current transformer the other way round.
How can I contact TKF's sales department?
Our contact information is on the Contact Us page
You can email our sales team at myynti@tkf.fi.
Download the selection guide
The guide provides a step-by-step overview of how to select a detuned capacitor bank for reactive power compensation.
Download a sample report
Coming soon
Reactive power calculator for dimensioning detuned capacitor banks
Enter the active power (kW), the power factor at the outset, and the desired power factor here. The calculator provides you with the required compensation power.
