IEC EN 61869-15 Instrument Transformers - Additional Requirements for Voltage Transformers for DC Applications

EUROLAB, with its state-of-the-art accredited laboratories and expert team, offers precise and rapid testing services within the scope of IEC EN 61869-15 testing. IEC EN 61869-15 provides all requirements specific to voltage transformers to be used in DC applications (DCVTs), regardless of the technology used. The output signal can be analog or digital.

It is applied to newly manufactured voltage transformers used for measurement, protection or control applications in DC power systems with nominal voltage above 1,5 kV.

This standard covers passive voltage dividers and active voltage transformers used for measurement, control and protection purposes. The general configuration of a single-pole low-power instrument transformer is described in IEC EN 61869-6.

IEC EN 61869-15 applies to voltage transformers (VT) intended for use in DC applications with the following functions:

• Measure DC voltage (with significant harmonics);
• Can withstand DC voltage.

There are two main technologies of DC converters today: LCC and VSC

• Line commutation converters (LCC) are based on thyristor converters. They are characterized by unidirectional current flow and the possibility of voltage polarity reversal. Significant voltage and current harmonics exist up to frequencies between approximately 3 kHz and 4 kHz.
• Voltage source converters (VSC) are based on transistor converters. They are characterized by a bidirectional current flow and a single voltage polarity. Voltage and current harmonics are present up to frequencies of about 20 kHz.

EUROLAB assists manufacturers with IEC EN 61869-15 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.