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 describes the D90
Plus
The D90 provides test settings to verify that functionality using simulated conditions for
contact inputs and outputs. To initiate the test mode, the
be "Enabled" and the operand assigned to the
logic 1.
In particular, the test mode is initiated as follows.
• To initiate test mode through the D90
The test mode starts when the
to "Enabled".
• 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 the test mode, the D90
procedures. The only difference between the normal operation and the 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 of performing checks on the function
of all contact inputs. Once enabled, the D90
feature 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 item to open the force contact
inputs configuration window.
Plus
testing features.
Test Mode Initiate
Plus
settings, set the
setting is changed from "Disabled"
Test Mode Function
setting to "Enabled" and the
Plus
remains fully operational, allowing for various testing
Plus
is placed into test mode, allowing this
setting must
Test Mode Function
setting must be set to
to "ON".
Test Mode Initiate
Test Mode Initiate
to
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