1. What is a Transformer Efficiency Calculator?

Definition: This calculator determines the efficiency of a transformer by comparing its output power to input power.

Purpose: It helps electrical engineers and technicians evaluate transformer performance and energy losses.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Efficiency — Percentage of input power that becomes useful output power
• Output Power — Power delivered to the load (Watts)
• Input Power — Power drawn from the source (Watts)

Explanation: The ratio of output to input power shows what percentage of energy is effectively transferred versus lost as heat.

3. Importance of Transformer Efficiency

Details: Higher efficiency means less energy wasted as heat, lower operating costs, and better environmental impact.

4. Using the Calculator

Tips: Enter both output and input power in watts. Input power must be greater than or equal to output power.

5. Frequently Asked Questions (FAQ)

Q1: What is a good efficiency percentage for transformers?
A: Modern power transformers typically have 95-99% efficiency, while smaller transformers may be 85-95% efficient.

Q2: Why can't efficiency be 100%?
A: Some energy is always lost as heat due to winding resistance, core losses, and other factors.

Q3: How do I measure input and output power?
A: Use a wattmeter or calculate as Voltage × Current × Power Factor for AC systems.

Q4: Does efficiency change with load?
A: Yes, transformers typically have peak efficiency at 50-75% of full load.

Q5: What improves transformer efficiency?
A: Better core materials, proper sizing, cooling systems, and high-quality windings.