Voltage Transformer Specification

A capacitor voltage transformer cvt or ccvt is a transformer used in power systems to step down extra high voltage signals and provide a low voltage signal for metering or operating a protective relay.

Voltage transformer specification. Iec 616 557 terminal and tapping markings for power transformers. Some transformer winding primary usually high voltage connecting wires are of many types. Sometimes a second isolated winding y 1 y 2 y 3 and third z 1 z 2 z 3 may also be available on the same. This list is not to be considered exhaustive and reference to a particular standard or.

May be labeled as h 1 h 2 sometimes h 0 if it is internally designed to be grounded and x 1 x2 and sometimes an x 3 tap may be present. Depending on their design voltage transformers will be connected either. Many specifications list a number of transformer standards and make a statement in the specifications that the transformers must meet these standards. Hitachi abb power grids is a major transformer manufacturer throughout the world and offers both liquid filled and dry type transformers as well as services for complete life cycle support including replacement parts and components.

Voltage and potential transformers are used to measure voltage potential. Doc 462 kb 4 1 2016. Rated primary voltage up. Iso 1460 2629 galvanising.

The voltage transformer must be suited to requirements relating to protection and. Find voltage and potential transformers on globalspec by specifications. Technical specification for 33 11kv power transformers apdrp scheme page 2 of 72 iec 606 application guide for power transformers. Medium voltage transformers provide value and reliability with a variety of options to increase system protection and environmental responsibility.

Some definitions and requirements of these standards such as csa c88 m90 ieee c57 12 00 and iec 60076 are different. Orbetween phases see figure 1b figure 1 voltage transformer connections. In its most basic form the device consists of three parts. The secondary voltage is substantially proportional to the primary voltage and differs from it in phase by an angle that is approximately zero.

Smaller time ratings are permissible by agreement between manufacturer and user. Transformers are available in standard and customizable designs to meet utility commercial and industrial applications. Class of accuracy for measuring voltage transformer the standard accuracy class of voltage transformer are 0 1 0 2 0 5 1 0 and 3 0. Between phase and earth see figure 1a.