Complete Square D transformer date code decoder: how to read YYWW modern codes and legacy alpha codes. Includes model number guide, nameplate reading chart, and common Square D transformer specs.
Square D Transformer Serial Number Lookup & Model Number Guide Read More »
The complete transformer kVA sizing chart with an interactive transformer sizing calculator that shows you exactly how to size a transformer kVA for any load. Includes standard NEMA sizes, power factor tables, and real sizing examples. ⚡ Quick Answer Single-Phase: kVA = Volts × Amps ÷ 1,000 Three-Phase: kVA = Volts × Amps × 1.732
Transformer kVA Sizing Chart: How to Size a Transformer [Calculator + NEMA Tables] Read More »
Learn what causes CT saturation and how it affects protection relays. Includes saturation curve interpretation, step-by-step testing procedures, and 5 proven prevention methods.
CT Saturation: Causes, Effects, Testing & How to Prevent It Read More »
⚡ Quick Answer: A CT ratio tells you how much a current transformer steps down the primary conductor current to a safe, measurable secondary current. A 200/5 CT steps 200A down to 5A (40:1). A 1200/5 CT steps 1200A down to 5A (240:1). You read it directly from the nameplate. The right ratio depends on
CT Ratio Explained: What It Means, How to Read It & Select the Right One Read More »
By Tan, Senior Transformer Technician | April 30, 2026 | 6 min read Your furnace won’t fire. The thermostat screen is dead. The control board LED is dark. Before you call for a $250 emergency service call, there’s a good chance the problem is a $30 part you can replace yourself in 20 minutes: the
Complete padmount transformer cost breakdown by kVA (25-2500 kVA). Unit prices, installation costs, and real-world scenarios. 100 kVA from $12,000. Updated 2026.
Padmount Transformer Cost Guide: 2026 Prices + Full Installation Breakdown by kVA Read More »
