IEEE C57.12.26 1992
$50.92
IEEE Standard for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase Distribution Transformers for Use with Separable Insulated High-Voltage Connectors (34 500 GrdY/19 920 Volts and Below, 2500 kVA and Smaller)
| Published By | Publication Date | Number of Pages |
| IEEE | 1992 | 31 |
New IEEE Standard – Inactive – Withdrawn. Withdrawn Standard. Withdrawn Date: Mar 06, 2000. No longer endorsed by the IEEE. This standard is intended for use as a basis for determining performance, interchangeability, and safety of the equipment covered, and for assisting in the proper selection of equipment. It covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of three-phase, 60 Hz, mineral-oil-immersed, self-cooled, pad-mounted, compartmental-type distribution transformers with separable insulated high-voltage connectors. These transformers are rated at 2500 kVA and smaller, with high voltages of 34 500 Grd Y/19 920 V and below and with low voltages of 480 V and below. These transformers are used generally for step-down purposes from an underground primary cable supply. Connector and terminal arrangements for both radial-feed and loop-feed systems are included.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | Title Page |
| 3 | Introduction Participants |
| 6 | CONTENTS |
| 7 | 1. Purpose and Scope 1.1 Purpose 1.2 Scope |
| 8 | 2. References 3. Ratings 3.1 Kilovolt-Ampere Ratings |
| 9 | 3.2 Voltage Ratings 3.3 Tap Ratings |
| 10 | 4. Basic Lightning Impulse Insulation Levels and Dielectric Test Levels 4.1 Basic Lightning Impulse Insulation Levels |
| 11 | 4.2 Dielectric Test Levels 5. Impedance Voltage 5.1 Percent Impedance Voltage 5.2 Tolerance 5.3 Tolerance on a Tap 6. Tests 6.1 General 6.2 Dielectric Test |
| 12 | 7. Construction 7.1 General |
| 13 | 7.2 Connectors and Terminals |
| 28 | 7.3 High-Voltage and Low-Voltage Compartments 7.4 Instruction Nameplate 7.5 Oil Preservation |
| 30 | 7.6 Tanks |
| 31 | 7.7 Components for Loop Primary Cable Systems 8. Installation 9. Storage |
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