IEEE C37.121-2012
Superseded
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
GUIDE FOR SWITCHGEAR - UNIT SUBSTATION - REQUIREMENTS
Available format(s)
Hardcopy , PDF
Superseded date
04-26-2021
Superseded by
Language(s)
English
Published date
01-01-2012
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1. Overview
2. Normative references
3. Definitions
4. Service conditions
5. Transformer section
6. Incoming section
7. Outgoing section
8. Ratings
9. Construction
10. Typical arrangements
11. Guide for selection, application, installation and
maintenance of unit substations
Annex A (informative) - Bibliography
Provides three-phase unit substations for step-down operation in the range of 112.5 kVA or greater at primary voltages of 601 V through 38 kV.
| DevelopmentNote |
Supersedes ANSI C37.121. (02/2013)
|
| DocumentType |
Standard
|
| Pages |
42
|
| PublisherName |
Institute of Electrical & Electronics Engineers
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| BS IEC/IEEE 62271-37-013:2015 | High-voltage switchgear and controlgear Alternating-current generator circuit-breakers |
| 14/30257408 DC : 0 | BS IEC/IEEE 62271-37-013 ED 1.0 - HIGH-VOLTAGE SWITCHGEAR AND CONTROLGEAR - PART 37-013: ALTERNATING-CURRENT GENERATOR CIRCUIT-BREAKERS |
| UFC 3-550-01 : CHANGE 1 | UNIFIED FACILITIES CRITERIA - EXTERIOR ELECTRICAL POWER DISTRIBUTION |
| ANSI C57.12.27 : 1982 | LIQUID-FILLED DISTRIBUTION TRANSFORMERS USED IN PAD-MOUNTED INSTALLATIONS INCLUDING UNIT SUBSTATIONS CONFORMANCE STANDARD FOR, |
| IEEE C37.91-2008 REDLINE | IEEE Guide for Protecting Power Transformers |
| IEEE C37.90-2005 | IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus |
| IEEE C37.20.1-2015 | IEEE Standard for Metal-Enclosed Low-Voltage (1000 Vac and below, 3200 Vdc and below) Power Circuit Breaker Switchgear |
| IEEE 241 : 1990 | ELECTRIC POWER SYSTEMS IN COMMERCIAL BUILDINGS |
| ANSI C37.57 : 1990 | SWITCHGEAR - METAL-ENCLOSED INTERRUPTER SWITCHGEAR ASSEMBLIES - CONFORMANCE TESTING |
| IEEE C57.12.01-2015 REDLINE | IEEE Standard for General Requirements for Dry-Type Distribution and Power Transformers |
| ANSI C37.51 : 1989 | SWITCHGEAR - METAL-ENCLOSED LOW-VOLTAGE AC POWER - CIRCUIT BREAKER SWITCHGEAR ASSEMBLIES - CONFORMANCE TEST PROCEDURES |
| NEMA SG 2 : 1993 | HIGH VOLTAGE FUSES |
| IEEE C37.20.2-2015 | IEEE Standard for Metal-Clad Switchgear |
| IEEE C57.12.36-2007 | IEEE Standard Requirements for Liquid-Immersed Distribution Substation Transformers |
| NFPA 70B : 2016 | RECOMMENDED PRACTICE FOR ELECTRICAL EQUIPMENT MAINTENANCE |
| IEEE C57.12.24-2009 | IEEE Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller: High Voltage, 34 500 GrdY/19 920 Volts and Below; Low Voltage, 600 Volts and Below |
| IEEE C57.93-2007 | IEEE Guide for Installation and Maintenance of Liquid-Immersed Power Transformers |
| IEEE C57.12.00-2015 | IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers |
| IEEE C57.91-2011 REDLINE | IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators |
| IEEE C57.96-2013 | IEEE Guide for Loading Dry-Type Distribution and Power Transformers |
| IEEE 4-2013 | IEEE Standard for High-Voltage Testing Techniques |
| IEEE 315 : 1975 | GRAPHIC SYMBOLS FOR ELECTRICAL AND ELECTRONICS DIAGRAMS (INCLUDING REFERENCE DESIGNATION LETTERS) |
| ANSI C37.55 : 1989 | MEDIUM VOLTAGE METAL-CLAD ASSEMBLIES - CONFORMANCE TEST PROCEDURES |
| IEEE C37.20.3-2013 REDLINE | IEEE Standard for Metal-Enclosed Interrupter Switchgear (1 kV-38 kV) |
| IEEE C57.104-2008 | IEEE Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers |
| IEEE C37.010-1999 | IEEE Application Guide for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current Basis |
| 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) |
| IEEE C37.40-2003 | IEEE Standard Service Conditions and Definitions for High-Voltage Fuses, Distribution Enclosed Single-Pole Air Switches, Fuse Disconnecting Switches, and Accessories |
| IEEE 142 : 2007 | GROUNDING OF INDUSTRIAL AND COMMERCIAL POWER SYSTEMS |
| 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 |
| NFPA 70 : 2017 | NATIONAL ELECTRICAL CODE |
| IEEE C57.142 : 2010 | GUIDE TO DESCRIBE THE OCCURRENCE AND MITIGATION OF SWITCHING TRANSIENTS INDUCED BY TRANSFORMERS, SWITCHING DEVICE, AND SYSTEM INTERACTION |
| IEEE C37.24-2003 | IEEE Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear |
| IEEE C57.12.70-2011 | IEEE Standard for Standard Terminal Markings and Connections for Distribution and Power Transformers |
| IEEE C57.12.40-2011 | IEEE Standard for Network, Three-Phase Transformers, 2500 kVA and Smaller; High Voltage, 34 500 GrdY/19 920 and Below; Low Voltage, 600 V and Below; Subway and Vault Types (Liquid Immersed) |
| NEMA ICS 2:2008 | Controllers, Contactors and Overload Relays Rated 600 V |
| IEEE C57.94-1982 | IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers |
| IEEE C37.23-2003 | IEEE Standard for Metal-Enclosed Bus |
| IEEE C57.12.50 : 1981 | 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 |
| IEEE C57.12.10-2010 REDLINE | IEEE Standard Requirements for Liquid-Immersed Power Transformers |
| IEEE 141 : 1993 | IEEE Recommended Practice for Electric Power Distribution for Industrial Plants |
| IEEE C57.106-2006 | IEEE Guide for Acceptance and Maintenance of Insulating Oil in Equipment |
| 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 |
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