618 D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
TEST MODE CHAPTER 14: TESTING
Figure 544: Force contact inputs configuration settings
The following settings are available.
Test Mode Function
Range: Enabled, Disabled
Default: Disabled
This setting enables and disables the test mode functionality for contact inputs.
Test Mode Initiate
Range: any FlexLogic operand
Default: ON
The test mode initiates when the operand assigned to this setting is logic 1.
Cont Ip 1, Cont Ip 2, ..., Cont Ip 12
Range: Normal, Open, Closed
Default: Normal
These settings allow the D90
Plus
contact inputs to respond to the test mode in the
following ways:
– If set to “Normal,” the input remains fully operational. It is controlled by the
voltage across its input terminals and can be turned on and off by external
circuitry. Select this value if a given input must be operational during the test. This
includes, for example, an input initiating the test, or being a part of a user pre-
programmed test sequence.
– If set to “Open,” the input is forced to report as opened (logic 0) for the entire
duration of the test mode regardless of the voltage across the input terminals
– If set to “Closed,” the input is forced to report as closed (logic 1) for the entire
duration of the test mode regardless of the voltage across the input terminals
These setting names reflect the programmed contact input names.
Force contact outputs
The force contact output feature allows relay contact outputs to be pre-programmed to
respond to the test mode. These settings are applied two ways. First, external circuits can
be tested by energizing or de-energizing contacts. Second, by controlling the output
contact state, relay logic can be tested and undesirable effects on external circuits
avoided.
Select the Settings > Testing > Force Contact Outputs menu to open the force contact
outputs configuration window.
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