4 Functions
QE81WH4W
(4) Restrictions for measuring data
- Measurement cannot be performed immediately after the power loading to the sequencer
system (Module ready signal is under the OFF condition).
After checking that Module ready (Xn0) is ON, obtain measuring data.
- Measurement cannot be performed immediately after operating conditions are set up to the
module. After checking that Operating condition setting completion flag (Xn9) becomes ON,
obtain measuring data.
- Behaviors during operation are as follows:
Measuring item
Behavior of the module
Current
When the input current is less than 0.4% of the rating current, it
becomes 0A.
Current
demand
Current demand is obtained by current moving average.
Therefore, even if current is 0A, current demand may not be 0A.
Voltage (L-N)
When the input voltage (L-N) is less than 55V, it becomes 0V.
If there is no input at voltage V1N, all measurement cannot be
done.
Voltage (L-L)
When the input voltage (L-L) is less than 95V, it becomes 0V.
Electric power
When current is 0A (at all phases are 0A) or when voltage is 0V
(all phases are 0V), it becomes 0kW.
Electric power demand
Electric power demand is obtained by electric power moving
average. Therefore, even if electric power is 0kW, electric power
demand may not be 0kW.
Power factor
When current is 0A (at all phases are 0A) or when voltage is 0V
(all phases are 0V), it becomes 100%.
Voltage condition
When the input voltage (L-N) is less than 55V, it becomes 0Hz.
Frequency
Frequency condition
When it is less than 44.5Hz, it is fixed to 44.5Hz.
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