Teleprotection - GE N60 Instruction Manual

INPUTS/OUTPUTS

5.9.9 Teleprotection

5.9.9.1 Overview
The relay provides 16 teleprotection inputs on communications channel 1 (numbered 1-1 through 1-16) and 16
teleprotection inputs on communications channel 2 (on two-terminals two-channel and three-terminal systems only,
numbered 2-1 through 2-16). The remote relay connected to channels 1 and 2 of the local relay is programmed by
assigning FlexLogic operands to be sent via the selected communications channel. This allows the user to create
distributed protection and control schemes via dedicated communications channels. Some examples are directional
comparison pilot schemes and direct transfer tripping. Note that failures of communications channels affect
teleprotection functionality. The teleprotection function must be enabled to utilize the inputs.
5.9.9.2 Teleprotection inputs
SETTINGS  INPUTS/OUTPUTS  TELEPROTECTION  TELEPROT INPUTS
 TELEPROT INPUTS

5
Setting the
TELEPROT INPUT ~~ DEFAULT
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."
5.9.9.3 Teleprotection outputs
SETTINGS  INPUTS/OUTPUTS  TELEPROTECTION  TELEPROT OUTPUTS
 TELEPROT OUTPUTS

As the following figure demonstrates, processing of the teleprotection inputs/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 any pair of relays.
5-310
TELEPROT INPUT 1-1

DEFAULT: Off

TELEPROT INPUT 1-16

DEFAULT: Off
TELEPROT INPUT 2-1

DEFAULT: Off

TELEPROT INPUT 2-16

DEFAULT: Off
setting to "On" defaults the input to logic 1 when the channel fails. A value of "Off"
TELEPROT OUTPUT 1-1:

Off

TELEPROT OUTPUT 1-16:

Off
TELEPROT OUTPUT 2-1:

Off

TELEPROT OUTPUT 2-16:

Off
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
Range: Off, On, Latest/Off, Latest/On
Range: Off, On, Latest/Off, Latest/On
Range: Off, On, Latest/Off, Latest/On
Range: Off, On, Latest/Off, Latest/On
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand