MA-025 – DGA 900 Operator Guide – Rev 2.0 12-Apr-19 Page 46 of 92
6.11.6.1 Alarm Reflash
The Alarm Reflash option ensures that a relay’s digital output reflashes (if already
activated) when another source triggers the same relay. An alarm reflash applies only to
relays 1-6 and is achieved by deactivating the relevant digital output for a duration of 1
second before reactivating it to achieve a flashing effect. This signifies to an operator or
control room in real time that multiple sources have triggered the same relay.
Note: This ensures that further alarms raised by the same source have no further
effect.
6.11.6.2 Clear Historical Data Only
Clears all historical data — DGA measurements, alarm data and Transopto measurements.
Table 6-2 outlines the type of data items that get erased.
6.11.6.3 Reset Configuration Settings
Clears all historical data described previously and resets configuration settings (except
Communications) to the default state. Table 6-2 outlines the type of data items that get
erased.
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