Some definitions and requirements of these standards such as csa c88 m90 ieee c57 12 00 and iec 60076 are different.
Potential transformer specification.
Medium voltage transformers provide value and reliability with a variety of options to increase system protection and environmental responsibility.
Transformers are available in standard and customizable designs to meet utility commercial and industrial applications.
The specifications of a voltage transformer mean the parameters by which the equipment is specified.
Specification for voltage transformer.
Potential or voltage transformer.
The purpose of the potential transformer is to provide an isolated secondary voltage that is in phase and exact proportionate representation of primary voltage.
The emergency rating of potential transformers is defined at one minute of operation thus enough time for protective equipment to operate.
Many specifications list a number of transformer standards and make a statement in the specifications that the transformers must meet these standards.
The ecosystem is designed to drive data driven intelligence and decision making in the operations and maintenance of transformers and power grids.
Potential transformer pt definition the potential transformer may be defined as an instrument transformer used for the transformation of voltage from a higher value to the lower value.
The potential transformers and accessories covered by this specification shall comply with the requirement of the latest edition of the following standards unless otherwise stated in this specification.
3156 part i iv.
An optical voltage transformer exploits the faraday effect rotating polarized light in optical materials.
Potential transformers are used for both protection and metering purposes.
The following have different explanations in these standards.
The electromagnetic potential transformer is a wire wound transformer.
A potential transformer must be capable of operating at 110 above rating voltage continuously provided the secondary burden in volt amperes at this voltage does not exceed the thermal rating.
The capacitor voltage transformer cvt uses a capacitance potential divider and is used at higher voltages due to a lower cost than an electromagnetic pt.
Application guide for voltage transformers.
The voltage transformer must comply with the network specifications this is essential.
As with any device the voltage transformer must meet requirements relating to the voltage current and frequency.
Rated outputs or va ratings.
