IEEE - The Institute of Electrical and Electronics Engineers@ Inc.
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IEEE C62.69-2016
Scope
This standard sets terms@ test methods@ test circuits@ measurement procedures@ and preferred result values for the surge parameters of isolating transformers used in networking devices and equipment. Three types of isolating transformer are considered: mains low frequency power@ high frequency power (switching mode power supplies) and signal (e.g.@ Ethernet data). The surge parameters of the isolating transformer insulation barrier covered by this standard are as follows: Rated impulse voltage Input winding to output winding capacitance Insulation resistance Additional parameters for signal isolating transformers are as follows: Core saturation voltage-time product Rated input winding rms current for a given temperature rise This standard does not cover the transformer parameters required to help ensure appropriate operation on the service (e.g.@ signal transformer return loss). Purpose The main purpose of this standard is to define a series of transformer impulse withstand voltage ratings that are higher than those of IEEE Std 802.3? [B21]1 with the intent to improve transformer insulation performance in uncontrolled environments. In the interests of international standardization@ the voltage values used are harmonized with the series defined in IEC 60664-1[B11] for low-voltage equipment insulation coordination. This IEEE standard is applicable to home networking installations@ which are typically uncontrolled environments@ where the surge voltage levels and the corresponding required transformer impulse withstand voltages can be higher than the LAN A controlled environment as defined by IEEE Std 802.3? [B21]. 1 The numbers in brackets correspond to those of the bibliography in Annex A.
IEEE C62.69-2016 history
2016IEEE C62.69-2016 The Surge Parameters of Isolating Transformers Used in Networking Devices and Equipment