Dc circuit breaker calculator

A DC circuit breaker calculator is a tool used to determine the correct size and type of DC circuit breaker needed for a specific electrical circuit. Here's a simple calculator you can use:

DC Circuit Breaker Calculator

Input Values:

1. Voltage (V): Enter the DC voltage of the circuit (e.g., 12V, 24V, 48V, etc.)
2. Current (I): Enter the maximum current draw of the circuit (e.g., 10A, 20A, 30A, etc.)
3. Circuit Length (L): Enter the length of the circuit (e.g., 10 feet, 20 feet, 30 feet, etc.)
4. Wire Size (AWG): Enter the size of the wire used in the circuit (e.g., 14AWG, 16AWG, 18AWG, etc.)
5. Temperature Rating: Enter the temperature rating of the circuit (e.g., 60°C, 80°C, 100°C, etc.)

Calculations:

1. Calculate the maximum power (P): P = V x I
2. Calculate the maximum energy (E): E = P x t (where t is the time the circuit is energized)
3. Calculate the maximum current (I): I = E / (V x t)
4. Calculate the required circuit breaker rating: Use the following formula:

Breaker Rating = √(2 x P / (V x t))

Output Values:

1. Recommended Circuit Breaker Rating: The calculated breaker rating is the recommended size and type of DC circuit breaker needed for the circuit.

Example:

Let's say we have a DC circuit with:

• Voltage: 12V
• Current: 20A
• Circuit Length: 20 feet
• Wire Size: 16AWG
• Temperature Rating: 80°C

Using the calculator, we get:

• Maximum Power: 240W (12V x 20A)
• Maximum Energy: 240W x 1 second = 240 Joules
• Maximum Current: 240 Joules / (12V x 1 second) = 20A
• Recommended Circuit Breaker Rating: √(2 x 240W / (12V x 1 second)) = 10A

Therefore, a 10A DC circuit breaker is recommended for this circuit.

Note: This calculator is a simplified tool and should be used as a guide only. It's always recommended to consult the manufacturer's specifications and follow local electrical codes and regulations when designing and installing electrical circuits.