Instrument Transformers Testing

Instrument transformers are equipment responsible for conditioning current and voltage signals that flow in the primary of the electrical system, to secondary values ​​delivered to protection relays, meters, among other equipment. Thus, it is essential that these equipments are tested periodically, since their malfunction can affect the performance of the protection and measurement systems.

In this context, Conprove has developed a line of universal testers that, in addition to carrying out tests at the secondary level (relays, meters, power quality analyzer, etc.) also carries out tests at the primary level, which involves the possibility of testing instrument transformers. Among the tests made possible, we can highlight:

• Transformation ratio, polarity and burden test;
• Magnetization Curve Test;
• Measurement of winding resistance;
• Verification of voltage dielectric support (2 kVac);