go to the Instrument transformers product page Anonymous asked on Jan 23rd, 2015 in Instrument transformers

What are other measuring technologies?

Nicholas S Powers, Global Product Marketing Manager Instrument Transformers

ABB's answer

Conventional Instrument transformers, CTs, VTs and CVTs are based on Iron Core/Copper Winding transformer solution to provde the scaled replicas of the primary currents or voltages for metering, controls, and protective relaying. New technologies appearing in the market are starting to draw attention of users for their particular charactristics that remove some of the short-comings of conventional designs and their enhanced compatibility to interface with new electronic instrumentation. These can provide viable alternative solutions vesus conventional instrument transformers Some of these Non-conventional Instrument Transformers (NCIT) are: Magneto-Optic and Electro-Optic sensors (very high accuracy, dynamic range, linearity, reduced size and weight); Rogowsky coils (wide operating range without saturation, can be embedded in insulators); Air core CT (wide operating range without saturation); Hall effective sensor (can be embedded in line posted insulators) and Resistor divider (Low cost)


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