How Ferroresonant Transformers Work

Written by adam cloe
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Ferroresonant transformers function as a type of uninterruptible power supply (UPS). Working much like a standard UPS, these transformers are designed to filter the amount of energy they produce. As a result, ferroresonant transformers are very good at supplying a constant level of voltage that is robust over different input voltages and energy needs. One of the advantages of a ferroresonant transformer is that it can limit current output in response to an overload or a short circuit to keep current in the circuit at a safe level. It can also provide "low-pass protection," which maintains power to a circuit at even levels, regardless of transient voltages as well as from power surges.

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UPS function

Uninterruptible power supplies can be used as a battery backup to provide energy when the normal input energy drops or is unavailable. While they are not meant to be used as an auxiliary or backup generator, they can be used to provide instant protection from power loss until a backup energy source can be found. UPS devices are commonly in use in computers, telecommunication equipment, and other devices in which a sudden loss of power can be harmful both to the machines and to the operators.

Advantages of ferroresonant UPS devices

Ferroresonant devices have a built in filter which can help keep energy output from going either above or below specific limits in response to power fluctuations. These transformers are also hardy, using their copper and steel structures to naturally filter energy output, allowing for regulation of current to occur within 3% of specified levels. Additional control can be generated adding additional electronic controls to modulate output to within 1%. The inherent current limiting features as well as it s robustness and reliability make ferroresonant transformers ideal for many UPS purposes.

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