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Operation 53
Maximum Auto-Retransfer Attempts
When a UPS output overload condition exceeds a pre-programmed current-versus-time window (based on the
SCC current rating), the UPS automatically transfers the critical load to the bypass line. After the overload condi-
tion has been corrected, the UPS attempts to automatically retransfer the critical load to the UPS output (unless
zero attempts is selected). The Maximum Auto-Retransfer Attempts limits the number of times (0 to 5) that
the UPS attempts to retransfer the load back to the UPS within a one-hour time period.
If more than the selected number of overloads occurs during one hour, the critical load remains on the bypass line
and must be manually retransferred to the UPS system. Note that you should determine the cause of any overload
condition.
Note that automatic re transfers are initiated only if the critical load was transferred to the bypass line because of
a system overload. If an automatic transfer to bypass occurred for any other reason, an automatic retransfer will
not be initiated. Refer to 3.4.3 - Automatic Retransfers to UPS.
Figure 34 Maximum Auto-Retransfer Attempts Screen
To change the Maximum Auto-Retransfer Attempts parameter, do the following at the SCC:
1. From the System Configuration Screen, press the Up or Down pad to highlight Maximum Auto-
Retransfer Attempts.
2. Press the Select pad. The screen above will appear.
3. Press the Up pad to increase the value or the Down pad to decrease it.
4. Press the Select pad to set the value and to return to the System Configuration screen.
MAXAUTO-REXFER ATTEMPTS
UPPERLIMIT
5
LOWE R INPUT
0
INCREASE
DECREASE
EXIT
UP :
DOWN :
SELECT :
VALUE
3
DISCONTINUED
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