Preface
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Designated Use
CPC 100, in conjunction with its accessories or as a stand-alone unit, is a multi-
purpose primary test set for commissioning and maintaining substation
equipment. It performs current transformer (CT), voltage transformer (VT) and
power transformer (TR) tests. Furthermore it is used for contact and winding
resistance testing, polarity checks as well as primary and secondary protection
relay testing.
The various, partly automated tests are defined and parameterized via the front
panel control of a built-in ePC (
⇒ Glossary).
Functionality of CPC 100
• Current transformer (CT)
– testing ratio, polarity (and burden) with injection to current input
– testing ratio, polarity (and burden) with a current clamp
– testing secondary burden
– measuring the excitation curve
– measuring winding resistance
– dielectric withstand voltage test (2kV AC)
– polarity check
– testing ratio and polarity by measuring the voltage ratio
– testing ratio and polarity of a Rogowski coil
– testing ratio and polarity of low power current transformer
• Voltage transformer (VT)
– testing ratio and polarity
– testing secondary burden
– dielectric withstand voltage test (2kV AC)
– polarity check
– testing ratio & polarity of non-conventional electronic voltage transformers
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