6 – 10
6 Buffer memory
QE81WH4W
6.2.6 Alarm 1 item (Un
\
G11), alarm 2 item (Un
\
G21)
Set which measuring item will be monitored for the upper/lower limit alarm.
Alarm 1 and 2 operate independently.
(1) Setting procedure
(a) Set the item for alarm 1 and 2 in the buffer memory. Setting range is as follows:
Setting value
Description
0 No
monitoring
1
Current demand upper limit
2
Current demand lower limit
3
Voltage (L-L) upper limit
4
Voltage (L-L) lower limit
5
Electric power demand upper limit
6
Electric power demand lower limit
7
Power factor upper limit
8
Power factor lower limit
9
Voltage (L-N)upper limit
10
Voltage (L-N)lower limit
(b) Measuring items for the monitoring target are as follows:
Description
Measuring item of monitoring target
Current demand upper limit
1-phase current demand
2-phase current demand
3-phase current demand
Neutral current demand *1
Current demand lower limit
1-phase current demand
2-phase current demand
3-phase current demand *1
Voltage (L-L) upper limit
Voltage (L-L) lower limit
1 - 2 line voltage
2 - 3 line voltage
3 - 1 line voltage *1
Electric power demand upper limit
Electric power demand lower limit
Electric power demand
Power factor upper limit
Power factor lower limit
Power factor *2
Voltage (L-N) upper limit
Voltage (L-N) lower limit
1 - 0 phase voltage
2 - 0 phase voltage
3 - 0 phase voltage *1
*1 When multiple number of measuring items are targeted for monitoring, the alarm judgment
condition will be as following.
Alarm judgment conditions
Upper/lower limits
Condition for occurrence
Condition for
non-occurrence
Current demand upper limit
Line voltage upper limit
Voltage (L-N) upper limit
Any one of alarm item
exceeds the alarm value.
All alarm item go below the
alarm value.
Current demand lower limit
Line
voltage lower limit
Voltage (L-N)
lower limit
Any one of alarm item go
below the alarm value
All alarm item exceeds the
alarm value
