Teleprotection - GE C70 Instruction Manual

CHAPTER 5: SETTINGS
In three-terminal applications, both the remote terminals must grant permission to trip. Therefore, at each terminal, direct
inputs 5 and 6 are ANDed in FlexLogic and the resulting operand configured as the permission to trip (
setting).

5.9.7 Teleprotection

5.9.7.1 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.
5.9.7.2 Teleprotection inputs
SETTINGS  INPUTS/OUTPUTS  TELEPROTECTION  TELEPROT INPUTS
 TELEPROT INPUTS

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."
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
Figure 5-169: Signal flow for direct input and output
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"
HYB POTT RX1
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
INPUTS/OUTPUTS
5
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