Dissipation/Power Factor Measurement (Tan Delta) on Instrument Transformers

An insulation failure is often the reason for an instrument transformer (IT) malfunction. 

Factors which possibly accelerate the insulation's aging process:

  • Moisture ingression due to broken seals
  • Heat caused by the ambient temperature or sunlight
  •  

Older insulation can lead to high losses in the IT, which generates further heat. Since ITs are not actively cooled, old or degraded insulation can result in a failure or even an explosion. Fragments from the explosion represent a serious hazard for persons in the substation as well as for surrounding equipment.

Dissipation/power factor (tan(δ) delta) measurements help you determine the insulation condition. When using our testing systems, you will also be able to determine the dissipation factor at various frequencies and detect any signs of aging at an early stage. Thus, an IT can be replaced before any further damage occurs.

Expert recommends

CPC 100 + CP TD12/15 + PTM

With CPC 100 you can perform the most common electrical tests on power and instrument transformers, rotating machines, grounding systems, power lines and cables. CP TD12/15 completes your CPC 100 for dissipation/power factor and capacitance measurements.

The CP TD12/15 includes a high-voltage source (12 kV/15 kV, 300 mA), a reference capacitor and measurement electronics. It achieves laboratory precision even in environments with strong interferences.

Benefits of this solution

Other solutions

CPC 80 + CP TD12/15 + PTM: Dedicated test system for dissipation/power factor testing on instrument transformers

The CPC 80 + CP TD12 respectively CPC 80 + CP TD15 is the perfect test system for analyzing the insulation condition of high voltage equipment by measuring the power/dissipation factor and capacitance.

The test system consists of two units – the CPC 80 control unit and the CP TD12 or CP TD15 module including a high-voltage source, reference capacitor and measurement electronics. The system allows the generation of output voltages up to 12 kV respectively 15 kV, currents up to 300 mA and achieves laboratory precision, even in environments with strong interferences.

Other solutions

TANDO 700

The portable TANDO 700 system offers high-precision measurement of dissipation/power factor (Tan Delta) and capacitance for high-voltage laboratory tests, such as routine and type tests, on instrument transformers. TANDO 700 also measures additional parameters such as power, current, voltage, impedance and frequency. TANDO 700 software shows you all measurement data in real-time, displays related trends and enables you to create customized reports. 

Get in touch

Need more details? Get a quotation?
Request for a demo?


You are using an outdated browser version.
Please upgrade your browser or use another browser to view this page correctly.
×