Voltage Transformer

Capacitive voltage transformers(72.5-550kV)
NTC capacitor voltage transformers, type CPA and CPB, are intended for connection between phase and earth in networks with insulated or earthed neutral point.

Some of the features of this type of transformers are:

1-the transformer, compensating reactor and damping circuit are assembled into a hermatically enclosed, oil filled aluminium tank, with an expansion volume at the top.
2-The windings for ratio adjustment are easily accessible to allow the user to optimize the transformer accuracy.
3-The dielectric used in the capacitor divider consists of a combination of oil impregnated paper and polypropylene film, resulting in CPA and CPB being practically impervious to temperature variation.
4-From the design point, the CPA and CPB are identical, apart from the CPB having a larger iron core enabling it to withstand higher loads.
5-In our opinion, due to their ferroresonance and temperature stability properties, the CPA and CPB are probably the world's best capacitive voltage transformers.

High Voltage Capacitive Voltage Transformers (CP Model) with technology of ABB-Sweden from 36kV up to 550kV, type tested in KEMA