Motor Starting/Overload Capabilities - Phase Technology Phase Perfect PT007 Operation & Installation Manual

MOTOR STARTING/OVERLOAD CAPABILITIES

All Phase Perfect digital phase convertors are rated to across the line start motors up to the
nameplate horsepower rating of the convertor except for 50 HP models and larger. Motor
starting capability is approximately equivalent to an across the line starter using a Class 10
thermal overload. This capability is accomplished using a Class 4 thermal overload
characteristic with a proprietary algorithm that limits inrush current on the manufactured leg
during startup to prevent nuisance tripping. During startup, voltage is folded back when
current exceeds 400% of Full Load Amps (FLA) of the converter. Below 400% of FLA, a
Class 4 thermal overload curve and thermal measurements, on the IGBTs, control overload
tripping.
10000.0
1000.0
100.0
10.0
1.0
10000.0
1000.0
100.0
10.0
1.0
Overcurrent/Motor Starting Sourcing Limit
0 50
PT007
Overcurrent/Motor Starting Sourcing Limit
0 100
PT030
100
Current (A)
PT010 PT020
200
Current (A)
PT040
V2.0
150 200
300 400
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