Dissipation/Power Factor Measurement (Tan Delta) on Power Cables

Capacitance, power factor and dissipation factor (tan delta) are important measurements to make in cables and cable accessories in order to assess the overall insulation losses of the insulation. The tests are useful in detecting deteriorated insulation and moisture or other contaminants.

A deviation from acceptable levels gives an indication of a change in the insulating material. Aging processes in the form of a structural modification of the insulation or the ingress of moisture, can increase the dissipation factor. A decrease factor can be explained, for example, by impregnating loss.

These measurements are useful in determining overall machine integrity when used in conjunction with other inspection activities. Timely periodic checks can identify problems and prevent the breakdown of cable insulation and eventual cable failure.

Benefits of this solution

High voltage potential

TANDO 700 measures both ungrounded and grounded test objects, since it can be operated on high voltage potential. The system is compatible with any type of reference capacitor.

High precision

The high measurement accuracy of 2E-5 allows you to achieve reliable measurements of capacitance and dissipation/power factor in both testing labs and in the field.

Extendable range

TANDO 700 can directly measure currents in a dynamic range from 5 μA to 1 A. The input range can be extended up to 28 A by adding the optional external shunts.

Safe, plug-and-play operation

TANDO 700 software automatically recognizes connected hardware for easy plug-and-play operation. Fiber optic connections ensure superior safety in high-voltage areas.

Literature

TANDO-700-Brochure-ENU.pdf (2 MB)