33
Basic Function Details Section 2-4
region in which the current is limited, as shown in the current tripping charac-
teristics graphs.
Abnormal Total Current Tripping Function
The S8AS monitors the total output current as well as the branch output cur-
rents. When the total output current exceeds the set value, all branch outputs
will be cut off. There are a number of conditions for the tripping current and
time. If even one of these conditions is detected, the abnormal total current
tripping function will be activated. The following table outlines the tripping con-
ditions. (Input voltage range: 200 to 240 VAC)
−: Not applicable
Note (1) If the input voltage range is not within the values specified above or the
total output current exceeds the maximum peak current value, internal
operation will become unstable and the branch outputs may be cut off.
(2) Maintain the total current for normal operation after the load devices have
started to within the rated ranges.
(3) Do not allow a peak current to flow again for at least 60 seconds after a
peak current has exceeded the rated current.
Current value
Time
Example sampling chart
Converted digital value
Current actually flowing
1 ms sampling period
Power-ON
time (s)
Total current (A) Operation Error code and
alarm output
Conditions
required to
reset
240W 480W
1 s min. --- 27 A When the total
current reaches
these values, all
branches will be
cut off within 20
ms.
The error code
A12 will flash on
the seven-seg-
ment display
and the Trip-
ping Alarm Out-
put (TRP)
photoswitch out-
put will turn
OFF.
After tripping
(15 s has
elapsed after
the previous
reset.)
2 s min. 17 A 25 A
5 s min. 15 A 22.5 A
10 s min. 13 A −
20 s min. 12 A −
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