1. What is a DLO Cable Voltage Drop Calculator?

Definition: This calculator estimates the voltage drop in DLO (Diesel Locomotive) cables based on cable properties and electrical current.

Purpose: It helps electrical engineers and technicians determine voltage loss in heavy-duty cable installations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( VD \) — Voltage drop (volts)
• \( \rho \) — Resistivity of conductor material (ohm-m)
• \( L \) — Length of cable (meters)
• \( I \) — Current flowing through cable (amps)
• \( A \) — Cross-sectional area of conductor (m²)

Explanation: The formula calculates voltage drop considering both outgoing and return paths (hence the factor of 2).

3. Importance of Voltage Drop Calculation

Details: Proper voltage drop estimation ensures equipment receives adequate voltage and prevents performance issues or damage.

4. Using the Calculator

Tips: Enter the conductor resistivity (default 1.72×10⁻⁸ ohm-m for copper), cable length, current, and cross-sectional area. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the resistivity value important?
A: Different materials have different resistivities (copper = 1.72×10⁻⁸, aluminum = 2.65×10⁻⁸ ohm-m), affecting voltage drop.

Q2: What's a typical acceptable voltage drop?
A: Generally 3% or less for branch circuits, 5% or less for feeders, but consult local codes.

Q3: Why multiply by 2 in the formula?
A: It accounts for both the outgoing and return paths in the circuit.

Q4: How do I find the cross-sectional area?
A: Check cable specifications or calculate using πr² for round conductors.

Q5: Does this include temperature effects?
A: No, for precise calculations at different temperatures, adjust resistivity accordingly.