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This guide covers general recommendations for the loading of dry-type distribution and power transformers installed in ventilated, non-ventilated, and sealed type enclosures.

定价： 112元 / 折扣价： 96 元

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This guide covers general recommendations for the loading of dry-type distribution and power transformers installed in ventilated, non-ventilated, and sealed type enclosures.

定价： 71元 / 折扣价： 61 元

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定价： 149元 / 折扣价： 127 元

This loading guide applies to ac high-voltage air switches in excess of 1000 V rated in accordance with IEEE Std C37.30-1992.1 This standard does not apply to switches used in enclosures covered by IEEE Std C37.20.2-1993, IEEE Std C37.20.3-1996, IEEE Std C37.23-1987, IEEE Std C37.71-1984, and ANSI C37.72-1987. Moreover, interrupter switches covered by IEEE. PC37.39 are excluded from the scope of this standard. If an air switch is equipped with a load-break device or interrupter, it may not… read more successfully interrupt currents above the nameplate rating. read less

定价： 141元 / 折扣价： 120 元

This guide provides recommendations for loading mineral-oil-immersed transformers and step-voltage regulators with insulation systems rated for a 65 °C average winding temperature rise at rated load. This guide applies to transformers manufactured in accordance with IEEE Std C57.12.001 and tested in accordance with IEEE Std C57.12.90, and step-voltage regulators manufactured and tested in accordance with IEEE Std C57.15. Because a substantial population of transformers and step-voltage… read more regulators with insulation systems rated for 55 °C average winding temperature rise at rated load are still in service, recommendations that are specific to this equipment are also included. read less

定价： 175元 / 折扣价： 149 元

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This guide provides recommendations for loading mineral-oil-immersed transformers and step-voltage regulators with insulation systems rated for a 65 °C average winding temperature rise at rated load. This guide applies to transformers manufactured in accordance with IEEE Std C57.12.00 and tested in accordance with IEEE Std C57.12.90, and step-voltage regulators manufactured and tested in accordance with IEEE Std C57.15. Because a substantial population of transformers and step-voltage… read more regulators with insulation systems rated for 55 °C average winding temperature rise at rated load are still in service, recommendations that are specific to this equipment are also included. read less

定价： 118元 / 折扣价： 101 元

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定价： 75元 / 折扣价： 64 元

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