4-27
IM CW240E
W
ir
ing
4
●
If the results of one or more wiring check are NG, check the following:
Results
Voltage input judgment
is NG.
Current input judgment
is NG.
Phase difference judgment
(voltage - current) is NG.
Voltage phase judgment
is NG.
Current phase judgment
is NG.
Frequency source check
is NG.
Scott connection check
is NG.
Measures
• Check if the voltage probes are connected properly to
the circuit under test.
• Check if the voltage probes are connected properly to
the voltage input terminals of the product.
• Check if the voltage range is appropriate to the input level.
• Check if the clamp-on probe(s) is clamped onto
the circuit under test properly.
• Check if clamp-on probe(s) is connected to the
current input terminal of the product properly.
• Check if the current range is appropriate to the input
level.
• Check if the voltage phase sequence is correct.
• Check if the direction of the arrows and the phase of
the clamp-on probe(s) are correct.
• Check if the voltage phase sequence is correct.
• Check if the circuit under test and the setting of the
wiring system agree with each other.
• Check if the direction of the arrows and the phase of
the clamp-on probe(s) are correct.
• Check if the circuit under test and the setting of the
wiring system agree with each other.
• Check if the voltage input selected for the frequency
source is stable.
• Check if the voltage probes selected for the frequency
source are connected properly.
• Check if the connection setting of the single-phase
3-wire load agrees with the circuit under test in the
Scott connection.
• Check if the voltage phase sequence is correct.
4.7 Checking Wiring