Installation guide

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3.29 String Box Alarms
3.29.1 Overview
There is one screen for setting all string box alarms. It is divided into two sections:
• Module alarms are triggered if any string monitoring module meets the conditions. SMS or Emails
are then sent according to the Group SMS and Email settings.
• Alarms between modules in a group are triggered if the values from any module deviate from the
average of all modules in the same group.
Deviation alarms operate by comparing the value from an input against an average value calculated from
several units.
Module alarms
Module alarms can be as shown on the screen. Minimum string current and voltage down alarms should only
be used for fault finding over short time periods as they will trigger when the plant is not producing.
Alarms between modules in a group
PV Clinic Runtime compares the values from each module in a group against the average value for the en-
tire group. If the deviation from the average exceeds the group average an alarm is given (by SMS or Email
according to the configuration). These alarms allow the quick identification of underperforming strings so that
corrective action can be taken to restore production.