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Transformer bushing clearance chart Several years ago, utilities in Southeast Asia embarked on a bushing reliability survey and, based on findings, formulated mitigation measures to improve bushing performance. Part 2 of this edited contribution to INMR by S. Gobi Kannan, Chitapon Jedwanna and Henny Ika, respectively at Tenaga.

Figure 2.

In North America the three main bushing standards that are used are CAN CSA C, IEEE C/C and IEC The CSA standard is in large part an adoption of the IEEE standard with some specific Canadian requirements (e.g. operational capability at °C is seen more as a standard requirement than a special requirement). Bushing Replacements for Power Transformers [email protected] Power transformer bushings are critical components in electrical power systems as they allow for the flow of electrical power from the power stations and renewable energy sources through the transformers to the distribution networks and to customers.

Sep 02, Electrical Safety Clearance for Transformer: Clearance from Outdoor Liquid Insulated Transformers to Buildings (NEC): Liquid Liquid Volume (m3) Fire Resistant Wall Non-Combustible Wall Combustible Wall Vertical Distance Less Flammable NA Meter Meter Meter Meter 38 m3 Meter Estimated Reading Time: 1 min.

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transformer over bushing. Maintain 3/8" clearance between current transformer housing and bushing tap socket. Caution: When mounting current transformer, care must be taken to see that the inside wall of the current transformer clears and does not touch any metal parts of the bushing or mounting, so as not to complete a ground circuit.