IEEE C57.12.50 : 1981
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
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 34500 VOLTS, LOW-VOLTAGE 120 TO 600 VOLTS
17-10-2023
01-01-1981
1. Scope
1.1
1.2
1.3
1.4
1.5
2. Related Standards and Guides
2.1 General
2.2 Terminology
2.3 Revision of American National Standards Referred
to in This Document
Part I: Basic Electrical and Mechanical Requirements
3. Usual Service Conditions
4. Ratings and Characteristics
4.1 Kilovolt-Ampere Ratings
4.2 Kilovolt-Ampere and Voltage Ratings
4.3 Taps
4.4 Insulation Levels
4.5 Polarity, Angular Displacement, and Terminal
Markings
4.6 Impedance Voltage
5. Construction
5.1 Insulation System
5.2 Accessory Location
5.3 Nameplate
5.4 Transformer Connections
5.5 Tap Changing
5.6 Lifting Facilities and Stability
5.7 Grounding Facilities
5.8 Transformer Enclosure
6. Routine Tests
7. Tolerances
Part II: Other Requirements or Alternatives That May Be
Specified for Some Applications
8. Other Ratings and Characteristics
8.1 Other Kilovolt-Ampere Ratings
8.2 40 degree C Average Ambient Temperature
Conditions
8.3 Other Winding Temperature Rises
8.4 Other Insulation Systems
8.5 Other High-Voltage Ratings and Connections
8.6 Y-Y Connected Transformers
8.7 Increased Neutral Insulation
8.8 Other Basic Lightning impulse Insulation Levels
(BILs)
9. Other Construction
9.1 High-Voltage Connection Arrangements
9.2 Low-Voltage Connection Arrangements
9.3 Surge Arresters
9.4 Unit Substation
9.5 Temperature Devices
9.6 Forced-Air Cooling
9.7 Provision for Future Forced-Air Cooling
9.8 Space Heaters
9.9 Current Transformers (or Provision for Their
Addition in the Future)
9.10 Terminal Blocks
9.11 Contacts
9.12 Jacking and Moving Facilities
10. Other Tests
Defines characteristics relating to performance, limited mechanical and electrical interchangeability, and safety of the equipment described, and to assist in the proper selection of such equipment.
| DocumentType |
Standard
|
| PublisherName |
Institute of Electrical & Electronics Engineers
|
| Status |
Withdrawn
|
| IEEE C57.94-1982 | IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers |
| IEEE C57.12.51-2008 | IEEE Standard for Ventilated Dry- Type Power Transformers, 501 kVA and Larger, Three-Phase, with High- Voltage 601 V to 34 500 V; Low- Voltage 208Y/120 V to 4160 V- General Requirements |
| IEEE DRAFT C57.12.91 : D3 2000 | DRAFT STANDARD TEST CODE FOR DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS |
| ANSI C57.12.52 : 2012 | Sealed Dry-Type Power Transformers, 501 kVA and Higher, Three-Phase, with High-Voltage 601 to 34500 Volts, Low-Voltage 208Y/120 to 4160 Volts—General Requirements |
| NEMA TR1 : 2013 | TRANSFORMERS, STEP VOLTAGE REGULATORS AND REACTORS |
| IEEE DRAFT C57.12.01 : D6 2005 | GENERAL REQUIREMENTS FOR DRY-TYPE DISTRIBUTION AND POWER TRANSFORMERS INCLUDING THOSE WITH SOLID-CAST AND/OR RESIN ENCAPSULATED WINDINGS |
| ANSI C57.12.57 : 1987 | AMERICAN NATIONAL STANDARD FOR TRANSFORMERS - VENTILATED DRY-TYPE NETWORK TRANSFORMERS 2500 KVA AND BELOW, THREE-PHASE, WITH HIGH-VOLTAGE 34500 VOLTS AND BELOW, LOW-VOLTAGE 216Y/125 AND 480Y/227 VOLTS - REQUIREMENTS |
| IEEE C37.121-2012 | GUIDE FOR SWITCHGEAR - UNIT SUBSTATION - REQUIREMENTS |
| IEEE C57.12.52-2012 | IEEE Standard for Sealed Dry-Type Power Transformers, 501 kVA and Higher, Three-Phase, with High-Voltage 601 to 34500 Volts, Low-Voltage 208Y/120 to 4160 Volts—General Requirements |
| IEEE C57.12.91-2011 | IEEE Standard Test Code for Dry-Type Distribution and Power Transformers |
| IEEE C57.12.70-2011 | IEEE Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers |
| IEEE C57.12.56-1986 | IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers |
| IEEE C37.121-2012 REDLINE | IEEE Guide for Switchgear - Unit Substation - Requirements |
| IEEE C57.12.51-2008 | REQUIREMENTS FOR SEALED DRY-TYPE POWER TRANSFORMERS, 501 KVA AND LARGER, THREE-PHASE, WITH HIGH-VOLTAGE 601 TO 34500 VOLTS, LOW-VOLTAGE 208Y/120 TO 4160 VOLTS |
| IEEE C57.12.01-2015 REDLINE | IEEE Standard for General Requirements for Dry-Type Distribution and Power Transformers |
| ANSI C57.12.52 : 2012 | Sealed Dry-Type Power Transformers, 501 kVA and Higher, Three-Phase, with High-Voltage 601 to 34500 Volts, Low-Voltage 208Y/120 to 4160 Volts—General Requirements |
| ANSI C84.1 : 2016 | ELECTRIC POWER SYSTEMS AND EQUIPMENT - VOLTAGE RATINGS (60 HERTZ) |
| NFPA 70 : 2017 | NATIONAL ELECTRICAL CODE |
| IEEE C57.12.70-2011 | IEEE Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers |
| IEEE C57.12.91-2011 | IEEE Standard Test Code for Dry-Type Distribution and Power Transformers |
| IEEE C57.94-1982 | IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers |
| IEEE C57.105-1978 | IEEE Guide for Application of Transformer Connections in Three-Phase Distribution Systems |
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