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3.2.5.1.1.2.6 Logic Operation Selection
This screen is used to perform the logical operation between the three limit
parameters. i.e. Limit - 1, Limit - 2 and Limit - 3.
User can perform any of the following operations using this screen :
1) None (To trip the relay based on only one limit parameter)
2) AND (To trip the relay when all the three limit parameters conditions are
satisfied)
3) OR (To trip the relay when any one of the three limit parameters
conditions are satisfied )
Pressing the “ ” key accepts the present value and advances to the “Relay Configuration” screen (see
Section 3.2.5.1.1.2.7).
Pressing the “ ” key accepts the present value and advances to the :
i)“Limit - 1 setting screens (see Section 3.2.5.1.1.2.1 to Section 3.2.5.1.1.2.5) in case of logical operation is set
as “None” (see Section 3.2.5.1.1.2.6).
OR
ii)“Limit - 3 setting screens (see Section 3.2.5.1.1.2.1 to Section 3.2.5.1.1.2.5) in case of logical operation is set
as other than “None” (see Section 3.2.5.1.1.2.6).
Pressing the “ ” key advances to Logic Operation edit mode.
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Pressing “ ” and “ ” keys scrolls through the options available.
1)None
2)AND
3)OR
Pressing the “ ” key sets the displayed value and advances to “Logic
Operation” Screen (see Section 3.2.5.1.1.2.6).
Note : (1) Default Selection is set to ‘None’.
(2) Limit Output Parameter Screens (see Section 3.2.5.1.1.2.1) for Limit - 2 and Limit - 3 are displayed or
configured only when logic operation screen (see Section 3.2.5.1.1.2.6) is set as AND or OR .
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