1. What is a Step-Down Transformer?

A step-down transformer converts high-voltage, low-current power into low-voltage, high-current power. The 120VAC to 24VDC transformer is commonly used in control systems, lighting, and other low-voltage applications.

2. How Does the Calculator Work?

The calculator determines key transformer parameters:

Calculations performed:

• Current Ratio = Input Voltage / Output Voltage
• Output Current = Power Rating / Output Voltage
• Input Current = Power Rating / Input Voltage

3. Importance of Transformer Calculations

Details: Proper transformer sizing ensures efficient power conversion, prevents overheating, and matches the requirements of connected devices.

4. Using the Calculator

Tips: Enter input voltage (typically 120VAC), output voltage (typically 24VDC), and the transformer's VA rating. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What does VA rating mean?
A: VA (Volt-Ampere) rating indicates the maximum power the transformer can handle without overheating.

Q2: Why convert 120VAC to 24VDC?
A: 24VDC is safer for control systems and low-voltage applications while maintaining good power efficiency.

Q3: How do I select the right transformer?
A: Choose one with VA rating ≥ your load's requirement and correct input/output voltages.

Q4: What's the difference between AC and DC transformers?
A: This calculator assumes an AC-DC converter is included in the system.

Q5: Where can I buy these transformers?
A: For sale through electrical suppliers, online retailers, and industrial equipment vendors.