4-26
IM CW240E
● Wiring Check Items and Error Conditions - 2
Item
Current phase
Frequency source
Scott connection
Error Conditions
• The result of current input judgment is NG.
• For 3P3W2I:
The phase of I3 lags behind that of I1.
• For 3P3W3I, 3P4W, or 3P4W4I:
The phase of I3 lags behind that of I1 or the phase of I2
leads that of I1.
• Frequency measurement is unstable.
• Input frequency is 40 Hz or less, or 70 Hz or more.
When the connection setting of a single-phase, 3-wire
load is set to:
• R-S phase,
V1n+V2n = 10% or more of voltage rating
• S-T phase,
V2n+V3n = 10% or more of voltage rating
• T-R phase,
V3n+V1n = 10% or more of voltage rating
4.7 Checking Wiring
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