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IEEE PC62.69A DRAFT
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IEEE PC62.69A DRAFT 2017 Edition, January 1, 2017 Draft Standard for the surge parameters of isolating transformers used in networking devices and equipment and Equipment Amendment 1: Addition of 4.5, Saturated Core Secondary Winding Parameters
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Description / Abstract:
This introduction is not part of IEEE PC62.69a/D3, Draft Standard for the Surge Parameters of Isolating Transformers used in Networking Devices and Equipment.
Ferrite cored broadband signal transformers tend to saturate when a differential surge occurs across the primary winding. Core saturation causes the loss of primary winding to secondary winding coupling, shortening the transformed surge duration in the secondary winding circuit. The main surge stress occurs after the transformer core saturates and the key secondary winding parameters controlling this surge stress level are the secondary winding resistance and saturated core inductance. This amendment adds a new sub clause 4.5 Saturated core secondary winding parameters to IEEE C62.69™-2016, which defines techniques for the determination of the secondary winding resistance and saturated core inductance.
Ferrite cored broadband signal transformers tend to saturate when a differential surge occurs across the primary winding. Core saturation causes the loss of primary winding to secondary winding coupling, shortening the transformed surge duration in the secondary winding circuit. The main surge stress occurs after the transformer core saturates and the key secondary winding parameters controlling this surge stress level are the secondary winding resistance and saturated core inductance. This amendment adds a new sub clause 4.5 Saturated core secondary winding parameters to IEEE C62.69™-2016, which defines techniques for the determination of the secondary winding resistance and saturated core inductance.