1 Answer
The formula to calculate **kilowatts (kW)**, which is a measure of power, depends on the type of system you're working with. Here are the most common formulas:
---
### **For Electrical Systems (Single-Phase AC or DC):**
**1. DC or Single-Phase AC:**
$$
\text{kW} = \frac{V \times I \times \text{PF}}{1000}
$$
* **V** = Voltage (Volts)
* **I** = Current (Amps)
* **PF** = Power Factor (typically between 0 and 1; use 1 for resistive loads like heaters)
* Divide by **1000** to convert watts to kilowatts
---
**2. Three-Phase AC:**
$$
\text{kW} = \frac{\sqrt{3} \times V \times I \times \text{PF}}{1000}
$$
* Same terms apply, but use **line-to-line voltage** and current.
---
### **For Mechanical Systems:**
$$
\text{kW} = \frac{\text{Torque (Nm)} \times \text{Speed (RPM)}}{9550}
$$
* This is used for motors and rotating machinery.
---
Would you like help applying one of these formulas to a specific problem?
---
### **For Electrical Systems (Single-Phase AC or DC):**
**1. DC or Single-Phase AC:**
$$
\text{kW} = \frac{V \times I \times \text{PF}}{1000}
$$
* **V** = Voltage (Volts)
* **I** = Current (Amps)
* **PF** = Power Factor (typically between 0 and 1; use 1 for resistive loads like heaters)
* Divide by **1000** to convert watts to kilowatts
---
**2. Three-Phase AC:**
$$
\text{kW} = \frac{\sqrt{3} \times V \times I \times \text{PF}}{1000}
$$
* Same terms apply, but use **line-to-line voltage** and current.
---
### **For Mechanical Systems:**
$$
\text{kW} = \frac{\text{Torque (Nm)} \times \text{Speed (RPM)}}{9550}
$$
* This is used for motors and rotating machinery.
---
Would you like help applying one of these formulas to a specific problem?