During test plug insertion and extraction maneuvers care should be taken to align and insert
properly the test plug in the block, one uniform movement should be done to avoid
misalignment between plug and block.
Reference lines
When the test plug is inserted into the test block, the user should push it until there is no gap
between the test block and the test plug, in order to guarantee that the retention system is
working during the safety extraction operation. To verify this, two lines have been arranged in
the plug. Once they are aligned with the framework of the block, they will help us to check
visually whether the plug is properly inserted or not.
Banana Connection
There are 28 banana plugs in the test plug, which allow the use of safety
banana plugs: 14 banana plugs of 4mm are used for the test injection of
the relay protection, and the other 14 to provide access to field elements.
All the banana plugs of the test plug are identified by a number that
corresponds to the same number in the test block.
In cases where a multiple plug banana connection in series is required, the
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