The purpose of the potential transformer is to provide an isolated secondary voltage that is in phase and exact proportionate representation of primary voltage.
Potential transformer specification pdf.
Adhere to ufc 1 300 02 unified facilities guide specifications ufgs format standard when editing this guide specification or preparing new project specification sections.
High voltage general purpose transformers 2 4kv to 15kv 15kva through.
The following have different explanations in these standards.
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 emergency rating of potential transformers is defined at one minute of operation thus enough time for protective equipment to operate.
Potential transformers are used for both protection and metering purposes.
Many specifications list a number of transformer standards and make a statement in the specifications that the transformers must meet these standards.
Base styles and ratings are shown below.
Potential or voltage transformer.
These transformers can be configured to meet most any application requirement.
Continuous rating the constant load which a transformer can carry its rated primary voltage and frequency without exceeding its specified temperature rise.
3156 part i iv.
These transformers cannot be used for reverse feed.
Then these values are the sum of the output of all the secondary winding of a single voltage transformer.
Sometimes a voltage transformer may have two or more than two secondary cores.
A transformer with a turns ratio which provides a higher than rated voltage at no load and rated voltage at rated load.
Some definitions and requirements of these standards such as csa c88 m90 ieee c57 12 00 and iec 60076 are different.
This transformer step down the voltage to a safe limit value which can be easily measured by the ordinary low voltage instrument like a voltmeter wattmeter and watt hour meters etc.
Specification for voltage transformer.
This guide specification covers the requirements for three phase pad mounted liquid filled transformers of the dead front and live front types for exterior applications.
All medium voltage transformers are engineered to order to the requested specifications.
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.
This is a one of the important specifications of voltage transformers.
