Vavg
V1-2
V1-3
V2-3
For more detailed information see “ Instructions for electronic module” FRCC.PI.031.
Voltage imbalance
The maximum allowable voltage imbalance is 2%. Voltage imbalance causes high amperage over one or several
phases, which in turn leads to overheating and possible motor damage. Voltage imbalance is given by the formula:
% voltage imbalance = | Vavg − V1−2 | + | Vavg − V1−3 | + | Vavg − V2−3 |
2 × Vavg
× 100
Mean voltage of phases 1, 2, 3.
Voltage between phases 1 and 2.
Voltage between phases 1 and 3.
Voltage between phases 2 and 3.
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Scroll compressors, CH290 and CH485 | Electrical connections