L. Regulating Apparatus

1. Properties and Types

Identify properties, types, and applications ^{2, 3, 4}

Step Voltage Regulators

• Step Voltage Regulators Introduction and Theory
• How Step-Voltage Regulators Operate
• Step-Voltage Regulators in Utility Distribution Systems

Load Tap Changers

• Understanding Load Tap Changers
• 4 Essential Features of Transformer On-Load Tap Changer (OLTC)
• Introduction to Paralleling of LTC Transformers by the Circulating Current Method
• The Basics of Transformer Voltage Regulation
• Control The Voltage At The End Of a Distribution Feeder
• Using Tap Changers to Match the System Voltage

Phase Shift / Autotransformers

• Autotransformer Connection Explained
• Where and Why Do We Use Phase-Shifting Transformers?

2. Inspection and Test Procedures

Apply visual and mechanical inspections ^{2, 3, 4}

• Transformer Tap Changers: Basic Principles and Testing Explained

Employ methods and procedures for electrical tests ^{3, 4}

• The Basics of Transformer Tap changers

3. Interpretation of Test Results

Evaluate results of electrical tests ^{3, 4}

• NETA-ATS 2017: Section 7.12 Regulating Apparatus ^2 3 4
• NETA-MTS 2019: Section 7.12 Regulating Apparatus ^2 3 4

Last Update: Feb 02, 2025