Capacitors play crucial roles in air conditioning (AC) and refrigeration systems, ensuring motors start and run efficiently. Here’s a clear explanation of their functions in these systems:

✅ 1. Start Capacitor

• Function: Provides a high starting torque to the compressor or fan motor.

• How it works: Temporarily connected during motor startup to create a phase shift in the current, giving extra power to start the motor.

• Location: Used in single-phase motors (common in ACs and fridges).

• Note: Disconnected after the motor reaches a certain speed (often via a relay or centrifugal switch).

🧠 Think of it as a "boost" to get the motor spinning.

🔄 2. Run Capacitor

• Function: Keeps the motor running smoothly and efficiently after it starts.

• How it works: Permanently connected to the motor circuit; improves power factor and maintains a rotating magnetic field.

• Location: Found in compressor motors, fan motors, and blower motors.

📉 Improves energy efficiency, reduces noise and heat.

🧹 3. Power Factor Correction

• Function: Improves the power factor of the motor, reducing wasted energy.

• Use: Especially important in large systems to make power consumption more efficient and lower electricity costs.

💡 Summary of Capacitor Functions in HVAC/R Systems

⚠️ Signs of a Bad Capacitor in AC/Refrigeration

• AC doesn't start or struggles to start

• Humming sound from the unit

• Warm air from AC vents

• Tripped circuit breakers

• Bulging or leaking capacitor
  
  
  Our ranges of run capacitors:
  20uf/450V
  25uf
  30uf
  35uf
  40uf
  45uf
  50uf
  60uf
  70uf