3 Phase Line Chokes Transformers
A 3 Phase Line Choke (often referred to as a 3 Phase Line Reactor) is not a transformer in the traditional sense, but it's an inductor used in 3-phase power systems. It’s commonly placed in series with the power line feeding into Variable Frequency Drives (VFDs), servo drives, or other sensitive equipment.
What is a 3 Phase Line Choke?
- It is a three-phase inductor.
- Placed between the power source and equipment like a VFD or servo drive.
- Made of coils of wire wound on a magnetic core—looks physically similar to a transformer but functions differently.
Function of a 3 Phase Line Choke
- Reduces Harmonics: Limits high-frequency harmonics generated by power electronics.
- Improves Power Factor: Helps maintain a more sinusoidal current waveform.
- Limits Inrush Current: Reduces spikes when equipment is turned on.
- Protects Equipment: Shields sensitive electronics from voltage transients or line disturbances.
- Prevents Nuisance Tripping: Helps avoid overvoltage trips in VFDs and similar devices.
Where is it Used?
- Before a VFD or servo drive
- In industrial automation panels
- In motor control centers
- With AC drives for HVAC, pumps, and conveyors