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Heat Load Formula:
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The Heat Load Calculation Formula estimates the thermal energy generated by electrical losses in panels using current, resistance, and number of phases. This helps in proper thermal management and cooling system design for electrical installations.
The calculator uses the heat load formula:
Where:
Explanation: The formula calculates power loss as heat using Joule's law (P = I²R) multiplied by the number of phases to account for total system heat generation.
Details: Accurate heat load calculation is essential for designing proper ventilation, selecting appropriate cooling systems, preventing equipment overheating, and ensuring electrical system reliability and safety.
Tips: Enter current in amperes, resistance in ohms, and select the number of phases. All values must be positive numbers. For single-phase systems, select 1-phase option.
Q1: Why calculate heat load in electrical panels?
A: To determine cooling requirements, prevent thermal damage to components, and ensure system operates within safe temperature limits.
Q2: What is the difference between 1-phase and 3-phase calculation?
A: Three-phase systems generate three times the heat of single-phase systems for the same current and resistance values.
Q3: How accurate is this calculation for real-world applications?
A: This provides a theoretical maximum. Actual heat generation may vary due to factors like ambient temperature, ventilation, and component efficiency.
Q4: What are typical resistance values for electrical panels?
A: Resistance depends on specific components and wiring. Consult manufacturer specifications or measure actual resistance for accurate calculations.
Q5: Can this formula be used for DC systems?
A: Yes, for DC systems use P = I²R directly without the phase multiplier.