Contact Outputs - GE D90 Plus Instruction Manual

PROTECTION INPUTS AND OUTPUTS

Contact outputs

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Figure 279: Contact input chatter detection configuration
The following settings are applied to all available protection and automation contact
inputs.
Function
Range: Enabled, Disabled
Default: Disabled
This setting enables and disables the chatter detection feature.
Chatter Time
Range: 1 to 100 seconds in steps of 1
Default: 10 seconds
This setting specifies the time window that the relay contacts are monitored for contact
input state changes.
Chatter State Changes
Range: 10 to 100 in steps of 1
Default: 30
This setting specifies the number of state changes that must occur in the time window
defined by the
Chatter Time
Since chatter detection is a hardware diagnostic, a trouble indication is logged regardless
of the setting being enabled or disabled for a particular input.
Events
Upon startup of the relay, the main processor will determine from an assessment of the
modules installed in the chassis which contact outputs are available and present the
settings for only these outputs.
Select the Settings > Protection > Protection Inputs/Outputs > Contact Outputs menu
item to access the contact output configuration settings.
Figure 280: Protection contact output configuration settings
The settings listed below are available for all contact outputs.
ID
Range: up to 12 alphanumeric characters
Default: Cont Op 1
This setting specifies an alphanumeric identifier for the contact output.
setting before issuing the trouble operand.
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION