Phasor Construction Methods

Here are a couple of ways to design AM Phasors :

The KAHS Phasor was built on aluminum panels that were, literally, screwed to wooden studs running from floor to ceiling. The various roller coils and variable capacitors were fastened to these panels, and the safety interlock was connected to a wooden door that allowed access to the rear of the phasor. Just like the door to a closet. All the contractors that switched fromn day to night pattern were fastened to a wooden sheet secured to the floor. This construction is inexpensive, fast to build, and is common for low powered stations.

By contrast, the phasor for 50 KW KXTA is built in 5 large metal cabinets. The parts mount to vertical aluminum walls built between the compartments, and to the metal floor.

The contactors are also mounted on these walls, as they are stout enough to handle the mechanical vibration without concern. Whereas the KAHS Phasor uses many roller coils, KXTA uses vacuum capacitors for most of the adjustments. They're much more reliable, especially at the higher power levels. Also, they seem much more stable electrically over long periods of time.


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