Generator Power; Wire Sizing; Connecting The Load - Phase Technology PERFECT PT007 Operation & Installation Manual

Generator Power

Phase Perfect phase converters can be powered by a generator, but it is recommended
that generator be sized 125% of the phase converter rating for proper operation. If a
generator will be used for backup power, a delay timer must be used to allow the phase
converter to completely shut down before transferring to a new power source. This delay
should be a minimum of 15 seconds.

Wire Sizing

Use Table 17 to find minimum guidelines on properly sizing input conductors according to
local electrical code. The voltage drop from the supply to the converter should be limited to
3% to ensure proper starting and operation of motor loads. Increase the wire gauge to
provide adequate voltage to the load. Ensure the wire gauge is suitable to the terminal
block.
Use the following formula to calculate line voltage drop.
Ω
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Connecting the Load

Do not connect single-phase loads to the manufactured leg, T3. This places unnecessary
load on the phase converter and may violate electrical code in some areas. Apply overload
and short circuit protection to protect load side conductors, motors, and other attached
loads according to local electrical code. For some motor loads and wiring configurations
load side short circuit protection may not be required. Consult local electrical code for
guidance.
Important Note:
If the connected load requires a wye configured power source with a neutral connection,
the load must be connected to the phase converter using a delta-wye isolation transformer.
Figure 5 – Delta-Wye Wiring Diagram
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