Quick Answer
Calculate Third Rail Voltage Drop Calculator for Rail Transit Systems
Calculator
Result Interpretation
Third Rail Voltage Drop Calculator for Rail Transit Systems Calculator computes Voltage Drop in V using the defined engineering formula and the input values provided.
Worked Example
Verified calculation
Given:
- Rail Segment Length = 50
- Load Current = 2000
- Electrical Efficiency Factor = 0.94
- Electrical Resistivity of Rail Steel = 1.72E-7
- Rail Cross-Sectional Area = 0.002
Expected Result:
- Voltage Drop = 9.1489361702128
Engineering Interpretation:
Under the given input conditions, the calculated result is: Voltage Drop = 9.1489361702128 V.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
voltage drop = load current * electrical resistivity of rail steel * rail segment length / (rail cross-sectional area * electrical efficiency factor)Formula family: formula_railtransit_third_rail_current_capacity_and_voltage_drop_calculator
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| current | Load Current | INPUT | Load Current |
| length | Rail Segment Length | INPUT | Rail Segment Length |
| cross_sectional_area | Rail Cross-Sectional Area | INPUT | Rail Cross-Sectional Area |
| efficiency_factor | Electrical Efficiency Factor | INPUT | Electrical Efficiency Factor |
| resistivity_steel | Electrical Resistivity of Rail Steel | INPUT | Electrical Resistivity of Rail Steel |
| voltage_drop | Voltage Drop | OUTPUT | Voltage Drop |
Calculation Steps
- Enter the load current in A.
- Enter the rail segment length in m.
- Enter the rail cross-sectional area in m^2.
- Enter the electrical efficiency factor in 1.
- Enter the electrical resistivity of rail steel in Ω·m.
- Step 1: Compute voltage drop.
- Read the voltage drop (V) from the results.
Engineering Summary
Calculate Third Rail Voltage Drop Calculator for Rail Transit Systems
Frequently Asked Questions
What does this calculator calculate?
The Third Rail Voltage Drop Calculator for Rail Transit Systems Calculator estimates Voltage Drop based on the input parameters you provide
Why is load current important in this calculation?
load current is directly proportional to voltage drop. When you enter load current in A, the calculator uses it in the engineering formula to compute the output
How should I interpret the result voltage drop?
The calculator outputs voltage drop in V. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Load Current (A), Rail Segment Length (m), Rail Cross-Sectional Area (m^2), Electrical Resistivity of Rail Steel (Ω·m). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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