Testing; Force Contact Inputs; Test Mode - GE D90 Plus Instruction Manual

D90
Chapter 14: Testing

Test mode

Force contact inputs

PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
Plus
Line Distance Protection System

Testing

This section outlines the D90
Plus
The D90 provides test settings to verify functionality using simulated conditions for
contact inputs and outputs. To initiate test mode, the
"Enabled" and the operand assigned to the
Specifically, test mode is initiated as follows:
• To initiate test mode through the D90
then start test mode by "Enabling" the
• To initiate test mode through a user-programmable condition, such as FlexLogic
operand, set the Test Mode Function
the desired operand. The test mode starts when the selected operand assumes a logic
1 state.
When in test mode, the D90
procedures. The only difference between normal operation and test mode is the behavior
of the input and output contacts. The former can be forced to report as open or closed or
remain fully operational; the latter can be forced to open, close, freeze, or remain fully
operational. The response of the digital input and output contacts to the test mode is
programmed individually for each input and output using the force contact inputs and
force contact outputs test functions described in the following sections.
The force contact inputs feature provides a method to perform checks on the function of
all contact inputs. Once enabled, the D90
to override the normal function of contact inputs. All contact input operations return to
normal when all settings for this feature are disabled.
Select the Settings > Testing > Force Contact Inputs menu to open the force contact
inputs configuration window.
Plus
testing features.
Test Mode Initiate
Plus
settings, set the
Test Mode Function
setting to "Enabled" and the
Plus
remains fully operational, allowing for various testing
Plus
is placed into test mode, allowing this feature
setting must be
Test Mode Function
setting must be set to logic 1.
Test Mode Initiate
setting.
Test Mode Initiate
to "ON,"
to
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