Burden for Current Transformer

WFY 47, 49 & 47-49

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Burden for Current Transformer is mainly used for loading a CT during testing. Available in several structural designs for use in a variety of testing environments, this Burden for Current Transformer is compliant with IEC 60044-1 or ANSI/IEEE C57.13. Customer specifications can also be requested to satisfy different requirements.

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Burden for Potential Transformer (Voltage Transformer)

WFY 95

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Burden for Potential Transformer is mainly used as the secondary load of a PT (VT) during testing. Available in several structural designs for use in various testing environments, this Burden for Potential Transformer is compliant with IEC 60044-1 or ANSI/IEEE C57.13. Customer specifications can also be requested to satisfy different requirements.

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Instrument Transformer Testing System

WHES Series

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WHES Series Instrument Transformer Testing System is designed to measure various properties of electromagnetic current transformers and potential transformers (voltage transformers).

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Current Transformers (CT) - Instrument Transformers

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Current transformers, abbreviated as CT, are specialized transformers used in AC electrical circuits. Together with voltage transformers (VT), they are collectively known as "instrument transformers." Current transformers function by transforming higher current (I1) on their primary side into lower current (I2) on their secondary side, maintaining a specific ratio. Typically, the secondary current is transformed into 5A or 1A, as prescribed by current IEC and IEEE regulations. The transformed current can be easily and safely measured, serving the purpose of monitoring and measuring electricity consumption in circuits and systems. Current transformers can also play a crucial role in providing protection to the primary side electrical circuits.

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Voltage Transformers / Potential Transformers (VT/PT) - Instrument Transformers

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Voltage transformers (VT), also known as potential transformers (PT), are a specialized type of transformers, collectively referred to as 'instrument transformers' alongside current transformers (CT). Voltage transformers usually consist of an iron core, a primary winding, and one or two secondary windings. In application, the primary winding is connected in parallel to an AC circuit with a voltage exceeding 200V. The VT converts the higher primary voltage (V1) to a standardized low secondary voltage (V2), typically 100V or 110V maximum (according to prevalent IEC or IEEE standards today). The secondary voltage is then utilized by instruments for purposes such as metering, monitoring, and protection through relays. Based on the primary voltage rating, VTs can be classified into low, medium and high voltage types. They can also be categorized as indoor or outdoor types based on application; and as metering or protective types based on function. CIC is the first manufacturer in Taiwan to specialize in cast resin voltage transformers, with over 45 years of experience in R&D and production of indoor VTs. CIC also utilizes advanced technology transferred from MWB Messwandler-Bau in Germany to manufacture outdoor medium-voltage metering VTs. The main insulation material used in CIC voltage transformers is Araldite® epoxy resin (cycloaliphatic epoxy for outdoor units), ensuring consistently high quality. CIC performs type tests and routine tests on all voltage transformers at its in-house Advanced Electricity Lab, accredited by TAF (an ILAC member). From design, type testing, to production and final testing, CIC self-controls the entire process to guarantee quality and on-time delivery. With a wide range of ratings in voltage ratio, burden, insulation class, materials, construction and dimensions, CIC voltage transformers meet various application requirements. VTs can also be customized to fit specific needs. CIC provides ODM/OEM services and manufactures products meeting different international standards. CIC voltage transformers have successfully reached markets in countries such as the United States, Canada, Russia, and Japan, with extensive use in power utilities, factories, major projects, electrical contractors for metering and distribution applications.

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