Transformers

Our offered Product range includes Metering Current Transformers and Auto Transformer.

Metering Current Transformers

Metering Current TransformersHill Technical offers commercial grade low cost current transformers with center window type (donut style) constructions. CTs are available in many different sizes with capabilities for measuring 50-400HZ currents of 5A to 15000A with secondaries of 0.1A, 1A and 5A (special secondary currents are available). Burden: B 0.1 through 1.8 (2.5VA to 50 VA) with Accuracy class: 0.2 to class 5.0 as per IEC 185 or class 0.3, 0.6 or 1.2 as per ANSI C 57.13. Inside diameters of up to 8.00". Many models are available as U.L. recognized devices. They can be specified with or without mounting feet and the secondary can be leads, terminals or per customer requirement.

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Auto Transformer

Auto-transformers are used strictly in a step-up or step-down application. They are very similar to isolation transformers with one important exception. In an auto-transformer the primary and secondary windings are electrically common to each other. The advantage of using an auto-transformer over an isolation transformer is its smaller size, its lighter and cost less. The major disadvantage is that there is no isolation between the primary and secondary which allows noise on the power line to be directly coupled to the load. Another disadvantage is that auto-transformers provide no regulation. It is also important to note that the greater the change in voltage the less cost effective the auto-transformer is. Some common applications for auto transformers are motors, heaters, and other non sensitive loads

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