GE D90 Plus Instruction Manual page 406

PROTECTION INPUTS AND OUTPUTS
Teleprotection output settings
Teleprotection input states
396
The following setting is available for all 16 teleprotection inputs on channels 1 and 2.
Teleprotection Input 1 Default States
Range: Off, On, Latest/Off, Latest/On
Default: Off
Programming this setting to "On" defaults the input to logic 1 when the channel fails. A
value of "Off" defaults the input to logic 0 when the channel fails.
The "Latest/On" and "Latest/Off" values freeze the input in case of lost communications.
If the latest state is not known, such as after relay power-up but before the first
communication exchange, then the input defaults to logic 1 for "Latest/On" and logic 0
for "Latest/Off".
Select the Settings > Protection > Protection Inputs/Outputs > Teleprotection >
Teleprotection Outputs menu item to open the teleprotection outputs configuration
window.
Figure 339: Teleprotection outputs configuration settings
The following setting is available for all 16 teleprotection inputs on channels 1 and 2.
Teleprotection Output 1 Operands
Range: any FlexLogic™ operand
Default: Off
Processing of the teleprotection inputs and outputs is dependent on the number of
communication channels and terminals. On two-terminal two-channel systems, they
are processed continuously on each channel and mapped separately per channel.
Therefore, to achieve redundancy, the user must assign the same operand on both
channels (teleprotection outputs at the sending end or corresponding teleprotection
inputs at the receiving end). On three-terminal two-channel systems, redundancy is
achieved by programming signal re-transmittal in the case of channel failure between
Plus
any pair of UR -series devices.
Select the Actual Values > Protection > Protection Inputs/Outputs > Teleprotection
Inputs menu item to open the teleprotection inputs states window.
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION