TRANSFORM campus 2013: High-voltage measuring systems for transformers

The measuring system LiMOS 2000/100 is designed for the voltage range up to 100 kV and operates with currents up to 2,000 A. The measuring system LiMOS 2000/100 is designed for the voltage range up to 100 kV and operates with currents up to 2,000 A.

HIGHVOLT also contributed to this year's Transform Campus seminar, which took place in Berlin in June. Dr. Ingo Müller, specialist for high-voltage measuring systems at HIGHVOLT, presented the latest developments in the field of loss measurements for transformers.

Certain electrical losses are inevitable when operating transformers. Decisive factors in this respect are above all eddy-current losses in the core and resistance losses in the windings, both of which are practically unavoidable. “Even though the losses are very small relative to the nominal power output of the transformer, the costs of these losses can still add up to a considerable sum over time,” Müller explained. “For this reason, they are also an essential quality criterion and a parameter addressed by relevant standards.”

Transformer manufacturers and their customers are concerned to be able to measure such losses with reproducible results and the greatest possible accuracy. With LiMOS, HIGHVOLT has developed a high-precision system which meets even the highest demands set by customers. The space requirements for the system are minimal. Power, voltage and current are measured with high precision in immediate proximity to the sensor and transmitted as optical signals. Automatic switching of the measuring range also permits considerable simplification of the test sequences in the test bay.


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