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IEEE - ANSI C57.12.22 - TRANSFORMERS - PAD-MOUNTED, COMPARTMENTAL-TYPE, SELF-COOLED THREE-PHASE DISTRIBUTION TRANSFORMERS WITH HIGH-VOLTAGE BUSHINGS, 2500 KVA AND SMALLER: HIGH VOLTAGE, 34 500 GRD Y/19 920 VOLTS AND BELOW; LOW VOLTAGE, 480 VOLTS AND BELOW - REPLACES NEMA C57.12.22-1993 Organization: IEEE
Date: 1993-01-01
Description: These transformers are rated 2500 kVA and smaller, with high voltages of 34 500 GrdY/19 920 volts and below, and with low voltages of 480 volts and below. These transformers are generally used for step-down purposes from an underground primary cable supply.
IEEE - ANSI C57.12.50 - REQUIREMENTS FOR VENTILATED DRY-TYPE DISTRIBUTION TRANSFORMERS, 1 TO 500 KVA, SINGLE-PHASE, AND 15 TO 500 KVA, THREE-PHASE, WITH HIGH-VOLTAGE 601 TO 34 500 VOLTS, LOW-VOLTAGE 120 TO 600 VOLTS - REPLACES NEMA C57.12.50-1981 Organization: IEEE
Date: 1981-01-01
Description: This standard is part of a new series of standards for dry-type transformers that also includes American National Standard General Requirements for Dry-Type Distribution and Power Transformers, ANSI/IEEE C57.12.01-1979; American National Standard Test Code for Dry-Type Distribution and Power Transformers, ANSI/IEEE C57.12.91- 1979; American National Standard Requirements for Ventilated Dry-Type Power Transformers, 501 kVA and Larger, Three-phase, with Highvoltage 601-34 500 Volts, Low-Voltage 208Y/120 to 4160 Volts, ANSI C57.12.51-1981; and American National Standard Requirements for Sealed Dry-Type Power Transformers, 501 kVA and Larger, Three- Phase, with High-Voltage 601-34 500 Volts, Low-Voltage 208Y/120 to 4160 Volts, ANSI C57.12.52-1981. Dry-type transformers have been covered in the past by a variety of documents, including American National Standard General Requirements for Distribution, Power, and Regulating Transformers, ANSI C57.12.00- 1973; American National Standard Test Code for Distribution, Power, and Regulating Transformers, ANSI C57.12.90- 1973; American National Standard Dry-Type Transformers for General Applications, ANSI/NEMA ST 20-1 972; and Commercial, Institutional, and Industrial Dry-Type Transformers, NEMA TR 27-1965 (R1976).
NEMA - C57.12.21 - PAD-MOUNTED, COMPARTMENTAL-TYPE, SELF-COOLED, SINGLE-PHASE DISTRIBUTION TRANSFORMERS WITH HIGH-VOLTAGE BUSHINGS; HIGH -VOLTAGE, 34 500 GRDY/19 920 VOLTS AND BELOW; LOW-VOLTAGE, 240/120 VOLTS; 167 KVA AND SMALLER, REQUIREMENTS FOR - NOW COPYRIGHTED BY IEEE Organization: NEMA
Date: 1980-01-01
Description: These transformers are rated 167 kVA and smaller with high voltages of 34 500 GrdY/19 920 volts and below for operation between one phase and grounded neutral, and low voltages of 240/120 volts. These transformers are generally used for purposes of stepdown from an underground primary cable supply.
NECA NEIS 410 - STANDARD FOR INSTALLING AND MAINTAINING LIQUID-FILLED TRANSFORMERS Organization: NECA
Date: 2013-01-01
Description: Products and Applications Included This standard describes installation procedures for pad-mounted, sealed, self-cooled or fan-cooled, compartmental, single- and three-phase liquid filled distribution and power transformers with primary windings rated from 2400 volts to 35 kV AC, nominal, and rated from 75 kVA through 5000 kVA, and associated accessories, designed for outdoor installation at grade level with underground entrance of primary and secondary conductors, and used for supplying power, heating and lighting loads for commercial, institutional, and industrial use in nonhazardous locations.
IEEE - ANSI C57.12.55 - TRANSFORMERS USED IN UNIT INSTALLATIONS, INCLUDING UNIT SUBSTATIONSCONFORMANCE STANDARD - REPLACES NEMA C57.12.55-1987 Organization: IEEE
Date: 1987-01-01
Description: Such transformers may be remotely or integrally associated with primary or secondary switchgear or substations, or both. The range of transformers is 601 volts through 34 500 volts (either primary or secondary) in sizes of 1 kVA through 2 500 kVA.
NECA NEIS 409 - STANDARD FOR INSTALLING AND MAINTAINING DRY-TYPE TRANSFORMERS Organization: NECA
Date: 2015-01-01
Description: Products and Applications Included This standard describes the installation and maintenance procedures for single- and threephase general purpose dry-type transformers and associated accessories rated 1000 Volts AC or less, and 0.25 kVA or more.
UL 1008A OUTLINE - OUTLINE OF INVESTIGATION FOR TRANSFER SWITCH EQUIPMENT, OVER 600 VOLTS - ISSUE 1 Organization: UL
Date: 2006-08-02
Description: These requirements cover transfer switch equipment rated greater than 600 Volts, up to 15 kV. These requirements cover transfer switches together with their associated control devices including voltage sensing relays, frequency sensing relays, time delay relays, and the like.
ANSI - ANSI C57.12.13 - CONFORMANCE REQUIREMENTS FOR LIQUID-FILLED TRANSFORMERS USED IN UNIT INSTALLATIONS, INCLUDING UNIT SUBSTATIONS Organization: ANSI
Date: 1982-01-01
Description: This standard does not cover the following types of liquid-filled transformers: (1)Overhead-type distribution transformers, including those mounted in surface enclosures (2)Pad-mounted compartmental-type transformers as described and defined in the following standards: American National Standard Requirements for Pad-Mounted Compartmental-Type Self-Cooled Single-Phase Distribution Transformers with High-Voltage Bushings (High-Voltage, 34 500 GrdY/19 920 Volts and Below; Low-Voltage, 240/120; 167 kVA and Smaller), ANSI C57.12.21-1980 American National Standard Requirements for Pad-Mounted Compartmental-Type Self-Cooled Three-Phase Distribution Transformers with High-Voltage Bushing (34 500 GrdY/19 920 Volts and Below; 2500 kVA and Smaller), ANSI C57.12.22-1980 American National Standard Requirements for Pad-Mounted Compartmental-Type Self-Cooled Single-Phase Distribution Transformers with Separable Insulated High-Voltage Connectors, High-Voltage 34 500 GrdY/19 920 Volts and Below; Low-Voltage, 240/120; 167 kVA and Smaller, ANSI C57.12.25-1981 American National Standard Requirements for Pad-Mounted Compartmental-type Self-Cooled Three-Phase Distribution Transformers for Use with Separable Insulated High-Voltage Connectors, High-Voltage, 24 940 GrdY/14 400 Volts and Below; 2500 kVA and Smaller, ANSI C57.12.26-1975 (3) Subsurface or submersible-type transformers as described and defined in the following standards: American National Standard requirements for Underground-Type Single-Phase Distribution Transformers, with Separable Insulated High-Voltage Connectors, High Voltage 24 940 GrdY/14 400 Volts and Below, Low Voltage 240/120, 100 kVA and Smaller, ANSI C57.12.23-1978 American National Standard Requirements for Underground-Type Three-Phase Distribution Transformers, 2500 kVA and Smaller; High Voltage 24 940 GrdY/14 400 Volts and Below; Low Voltage 480 Volts and Below, ANSI C57.12.24-1982 American National Standard Requirements for Secondary Network Tranformers, Subway and Vault Types (Liquid Immersed), ANSI C57.12.40-1982 (4) Rectifier transformers (5) Mobile transformers (6) All transformers for use in ships and other watercraft, railway rolling stock, aircraft, and automotive vehicles other than mobile home and recreational vehicles (7) Transformers used in mines (8) Transformers installed in railways for the generation, transformation, transmission, or distribution of power and used exclusively for operation of rolling stock, or transformers installed in railways and used exclusively for signaling, or communication purposes (9) Instrument transformers (10) Step-voltage regualors and induction voltage regulators (11) Arc furnace transformers (12) Transformers installed with communication equipment under the exclusive control of communication utilities, located outdoors or in building spaces used exclusively for such installations (13) Transformers that are used under the exclusive control of electric utilities for the purpose of communication or metering, or for the generation, control, transformation, transmission, and distribution of electric energy and that are located in buildings used exclusively for such purposes or located outdoors on property owned or leased by the utility, or on public highways, streets, roads, etc, or by established rights on private property
UL 1561 - UL STANDARD FOR SAFETY DRY-TYPE GENERAL PURPOSE AND POWER TRANSFORMERS - FOURTH EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING JUNE 16, 2015 Organization: UL
Date: 2011-03-02
Description:   These requirements do not cover ballasts for high intensity discharge (HID) lamps (metal halide, mercury vapor, and sodium types) or fluorescent lamps, exposed core transformers, compound-filled transformers, liquid-filled transformers, voltage regulators, general use or special types of transformers covered in requirements for other electrical equipment, autotransformers forming part of industrial control equipment, motor-starting autotransformers, variable voltage autotransformers, transformers having a nominal primary or secondary rating of more than 600 volts, or overvoltage taps rated greater than 660 volts.
UL 1562 - UL STANDARD FOR SAFETY TRANSFORMERS, DISTRIBUTION, DRY-TYPE - OVER 600 VOLTS - FOURTH EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING OCTOBER 22, 2015 Organization: UL
Date: 2013-01-25
Description: These transformers are intended for installation in accordance with the National Electrical Code, ANSI/NFPA 70. These requirements do not cover the following transformers: a) Instrument transformers b) Step-voltage and induction voltage regulators c) Current regulators d) Arc furnace transformers e) Rectifier transformers f) Specialty transformers (such as rectifier, ignition, gas tube sign transformers, and the like) g) Mining transformers h) Motor-starting reactors and transformers These requirements do not cover transformers under the exclusive control of electrical utilities utilized for communication, metering, generation, control, transformation, transmission, and distribution of electric energy regardless of whether such transformers are located indoors, in buildings and rooms used exclusively by utilities for such purposes; or outdoors on property owned, leased, established rights on private property or on public rights of way (highways, streets, roads, and the like).
UL 1598A - UL STANDARD FOR SAFETY SUPPLEMENTAL REQUIREMENTS FOR LUMINAIRES FOR INSTALLATION ON MARINE VESSELS - FIRST EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING APRIL 17, 2015 Organization: UL
Date: 2000-12-04
Description: These requirements do not apply to marine lighting luminaires for use in hazardous locations, as defined in the National Electrical Code, ANSI/NFPA 70, emergency lighting marine luminaires, or low voltage marine luminaires (less than 50 volts) supplied solely by a battery, transformer, converter, or similar power supply source.
UL 1472 - UL STANDARD FOR SAFETY SOLID-STATE DIMMING CONTROLS - SECOND EDITION Organization: UL
Date: 2015-09-25
Description: These requirements cover dimmers, including touch dimmers, and electronic switches, having a minimum power rating of 300 watts incandescent or 300 volt-amperes in increments of 50 watts or 50 volt-amperes. Devices may have additional current ratings based upon the additional lighting loads as specified by the manufacturer.
CSA C22.2 NO 184.1 - SOLID-STATE DIMMING CONTROLS - SECOND EDITION Organization: CSA
Date: 2015-01-01
Description: These requirements cover dimmers, including touch dimmers, and electronic switches, having a minimum power rating of 300 watts incandescent or 300 volt-amperes in increments of 50 watts or 50 volt-amperes. Devices may have additional current ratings based upon the additional lighting loads as specified by the manufacturer.
NEMA - C37.121 - SWITCHGEAR - UNIT SUBSTATIONS - REQUIREMENTS - NOW COPYRIGHTED BY IEEE Organization: NEMA
Date: 1989-01-01
Description: This standard covers the requirements for three-phase unit substations for step-down operation in the range of 112.5 kVA through 10 000 kVA at primary voltages of 601 volts through 38 kilovolts. The standard is intended for use as the basis for the coordination of equipment by assisting in the selection of components.
NECA NEIS 700 - STANDARD FOR INSTALLING OVERCURRENT PROTECTION TO ACHIEVE SELECTIVE COORDINATION Organization: NECA
Date: 2010-01-01
Description: Products and Applications Included This standard covers the installation of low-voltage overcurrent protective devices, circuit breakers and fuses, rated 600 volts and less, for selective coordination in electrical distribution systems for residential, commercial, and industrial applications.
UL 428B OUTLINE - OUTLINE OF INVESTIGATION FOR ELECTRICALLY OPERATED VALVES FOR DIESEL FUEL, BIODIESEL FUEL, DIESEL/BIODIESEL BLENDS WITH NOMINAL BIODIESEL CONCENTRATIONS UP TO 20 PERCENT (B20), KEROSENE, AND FUEL OIL - ISSUE 1 Organization: UL
Date: 2012-11-02
Description: These requirements cover electrically operated general purpose and safety valves rated 600 volts or less and intended for the control of the fluids specified in 1.2.
UL 428B - UL STANDARD FOR SAFETY ELECTRICALLY OPERATED VALVES FOR DIESEL FUEL, BIODIESEL FUEL, DIESEL/BIODIESEL BLENDS WITH NOMINAL BIODIESEL CONCENTRATIONS UP TO 20 PERCENT (B20), KEROSENE, AND FUEL OIL - FIRST EDITION Organization: UL
Date: 2015-06-05
Description: These requirements cover electrically operated general purpose and safety valves rated 600 volts or less and intended for the control of the fluids specified in  Electrically operated valves, other than automotive fuel valves, covered by these requirements are intended to be used in other than hazardous locations as defined in accordance with the National Electrical Code, ANSI/NFPA 70.
UL 283 - UL STANDARDS FOR SAFETY AIR FRESHENERS AND DEODORIZERS - THIRD EDITION; REPRINT WITH REVISIONS THROUGH AND INCLUDING DECEMBER 16, 2016 Organization: UL
Date: 2015-06-16
Description: Electric toy transformers are covered by the Standard for Toy Transformers, UL 697.
UL 428A - UL STANDARD FOR SAFETY ELECTRICALLY OPERATED VALVES FOR GASOLINE AND GASOLINE/ETHANOL BLENDS WITH NOMINAL ETHANOL CONCENTRATIONS UP TO 85 PERCENT (E0 - E85) - FIRST EDITION Organization: UL
Date: 2015-06-04
Description: These requirements cover electrically operated general purpose and safety valves rated 600 volts or less and intended for the control of the fluids specified in 1.2.
UL 428A OUTLINE - OUTLINE OF INVESTIGATION FOR ELECTRICALLY OPERATED VALVES FOR GASOLINE AND GASOLINE/ ETHANOL BLENDS WITH NOMINAL ETHANOL CONCENTRATIONS UP TO 85 PERCENT (E0 – E85) - ISSUE 1 Organization: UL
Date: 2012-11-02
Description: These requirements cover electrically operated general purpose and safety valves rated 600 volts or less and intended for the control of the fluids specified in 1.2.

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