This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of 60-Hz, two-winding, liquid-immersed transformers rated as follows, and used for step-down purposes: 1) 833/958 through 8333/10 417 kVA, single-phase; 750/862 through 10 000/12 500 kVA, three-phase; high voltage, 2400 through 138 000 volts; low-voltage, 480 through 36 230 volts; without load tap changing. 2) 12 000/16 000/20 000 through 60 000/80 000/ 100 00… read more 0 kVA, three-phase; high voltage, 23 000 through 230 000 volts; low voltage, 4800 through 36 230 volts; without load tap changing. 3) 3750/4687 through 10 000/12 500 kVA, three-phase; high voltage, 6900 through 138 000 volts", low voltage, 2400 through 36 230 volts; with load tap changing. 4) 12 000/16 000/20 000 through 60 000/80 000/100 000 kVA, three-phase; high voltage, 23 000 through 230 000 volts; low voltage, 4800 through 36 230 volts; with load tap changing It is not intended that this standard shall apply to dry-type, regulating, pad-mounted, secondary-network, furnace, rectifier, or mine transformers. read less

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This guide covers the application of surge-protective devices (SPDs) for installation on the load side of the service equipment for 50 Hz or 60 Hz, ac power circuits rated 1000 V rms or less.

定价： 158元 / 折扣价： 135 元

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This standard provides guidance and checklists for the collection of required data for performing an arc-flash hazard calculation study in accordance with the process defined in IEEE 1584-2018 and IEEE 1584.1-2022 for systems operating at three-phase 50/60 Hz alternating current (AC) 1000 V and below. This standard does not include collection of data required for performing other system studies, such as a short-circuit study and overcurrent protective device coordination study. Results from… read more these system studies are required to conduct an arc-flash hazard calculation study. read less

定价： 65元 / 折扣价： 56 元

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