Dunno what he meant, but the static phase converter mentioned that only powered two phases after startup is pretty lame.
The voltage you get from an RPC is skewed relative to ground. That can occasionally cause problems, especially if auxillary circuitry picks off a single phase to derive a 120VAC to neutral. With an RPC, that works for two of the three phases, but the phase created by the RPC (the "wild leg") runs at 208VAC relative to ground.
VFDs don't have that problem, but because they use pulse-width modulation to simulate a sine wave, they do generate a lot of RF noise.
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The voltage you get from an RPC is skewed relative to ground. That can occasionally cause problems, especially if auxillary circuitry picks off a single phase to derive a 120VAC to neutral. With an RPC, that works for two of the three phases, but the phase created by the RPC (the "wild leg") runs at 208VAC relative to ground.
VFDs don't have that problem, but because they use pulse-width modulation to simulate a sine wave, they do generate a lot of RF noise.
Sent from my Pixel XL using Tapatalk