IEEE DRAFT C57.12.23 : 1992
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
TRANSFORMERS - UNDERGROUND-TYPE, SELF-COOLED, SINGLE-PHASE DISTRIBUTION TRANSFORMERS WITH SEPARABLE, INSULATED, HIGH-VOLTAGE CONNECTORS; HIGH VOLTAGE (24 940 GRDY/14 400 V AND BELOW) AND LOW VOLTAGE (240/120 V, 167 KVA AND SMALLER)
25-11-2009
12-01-2013
1. INTRODUCTION
1.1 Scope
1.2 Purpose
1.3 General
2. REFERENCES
3. RATINGS
3.1 Kilovoltampere Ratings
3.2 Voltage Ratings and Tap Ratings
4. BASIC LIGHTNING IMPULSE INSULATION LEVELS AND
DIELECTRIC TEST LEVELS
5. TESTS
5.1 General
5.2 Dielectric Tests
6. CONSTRUCTION
6.1 General
6.2 Connectors and Terminals
6.3 Instruction Nameplate
6.4 Oil Preservation
6.5 Tanks
6.6 Components for Looped Primary Cable System
7. STORAGE AND INSTALLATION
7.1 Storage
7.2 Installation
FIGURES
Fig 1 Location of High-Voltage and Low-Voltage
Connectors and Terminals
Fig 2 Spade Terminals
TABLES
Table 1 Transformer and Connector High-Voltage Ratings
and Electrical Characteristics
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