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Transformer Theory

A transformer is an energy transfer device. It has an input side (primary) and an output side (secondary). Electrical energy applied to the primary is converted to a magnetic field which in turn, induces a current in the secondary which carries energy to the load connected to the secondary. The energy applied to the primary must be in the form of a changing voltage which creates a constantly changing current in the primary, since only a changing magnetic field will produce a current in the secondary.

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Transformers
Transformers are electrical devices that are designed to transfer energy from one circuit to another by electromagnetic induction. They are used typically to increase or decrease voltage as it passes from one side of the device through the other.
Current Transformers
Current transformers are used to step down current in a very predictable fashion with respect to current and phase. They are generally used as inputs to current instruments.
Signal Transformers
Signal transformers transfer information from one circuit to another by electromagnetic induction. They are used to increase or decrease the voltage from one side of a power transformer to the other.
Single Phase Transformers
Single phase transformers are designed to supply electric power to single-phase systems.
Product Announcements
FLEX-CORE - High Voltage Potential Transformer
• Frequency ....60Hz. • Standard Secondary Voltage .. 120VAC • Insulation Class ....15.5kV, BIL 110KV Full Wave • UL Recognized • FOR INDOOR USE ONLY... (read more)
Hsiang Cheng Electric Corp. - PTC8320E-Close link type 3 phase test bench
PTC 8320E three phase energy auto-calibration system is used to test both single / 3 phase Close Link type energy meter (up to class 0.2%). This bench is using the aluminum compound configuration to... (read more)
Hsiang Cheng Electric Corp. - PTC-8320D Three Phase Energy Meter Test Bench
PTC 8320D three phase energy auto-calibration system is used to test both single / 3 phase energy meter (up to class 0.2%). This bench is using the aluminum compound configuration to form with digital... (read more)
Cooper Instruments & Systems - Linear Variable Differential Transformer (LVDT)
These transducers are for displacement/position measurement. This transducer uses the Linear Variable Differential Transformer (LVDT) principle which means that it is probably the most robust and... (read more)
Topics of Interest

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