Single Phase Single Module kWh Meter

Energy Consumption Formula:

\[ E_{kWh} = \frac{V \times I \times PF \times t}{1000} \]

Voltage (V):

volts

Current (I):

amps

Power Factor (PF):

Time (t):

hours

Energy Consumption (E_kWh): kWh

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1. What is a Single Phase Single Module kWh Meter?

Definition: This calculator measures energy consumption in kilowatt-hours (kWh) for single-phase electrical systems using voltage, current, power factor, and time.

Purpose: It helps homeowners, electricians, and engineers calculate electrical energy usage for single-phase appliances and systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ E_{kWh} = \frac{V \times I \times PF \times t}{1000} \]

Where:

\( E_{kWh} \) — Energy consumption (kilowatt-hours)
\( V \) — Voltage (volts)
\( I \) — Current (amperes)
\( PF \) — Power factor (unitless, 0 to 1)
\( t \) — Time (hours)

Explanation: The product of voltage, current, power factor, and time gives watt-hours, which is converted to kWh by dividing by 1000.

3. Importance of Energy Calculation

Details: Accurate energy measurement helps in monitoring electricity usage, calculating costs, and designing efficient electrical systems.

4. Using the Calculator

Tips: Enter the voltage in volts, current in amps, power factor (default 1.0 for resistive loads), and time in hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is power factor?
A: Power factor is the ratio of real power to apparent power, ranging from 0 to 1. Resistive loads have PF=1, while inductive loads have PF<1.

Q2: How do I measure current?
A: Use a clamp meter or multimeter to measure current in the circuit.

Q3: What's typical household voltage?
A: In North America, 120V or 240V; in Europe/Asia, 220-240V.

Q4: Can I use this for three-phase systems?
A: No, this is for single-phase only. Three-phase requires a different formula.

Q5: Why divide by 1000?
A: To convert watt-hours to kilowatt-hours (1 kWh = 1000 Wh).