5-268
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
INPUTS/OUTPUTS
CHAPTER 5: SETTINGS
5
Figure 5-147: Signal flow for direct input and output
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 (
HYB POTT RX1
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
Setting the
TELEPROT INPUT ~~ DEFAULT
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.”
TELEPROT INPUTS
TELEPROT INPUT 1-1
DEFAULT: Off
Range: Off, On, Latest/Off, Latest/On
TELEPROT INPUT 1-16
DEFAULT: Off
Range: Off, On, Latest/Off, Latest/On
TELEPROT INPUT 2-1
DEFAULT: Off
Range: Off, On, Latest/Off, Latest/On
TELEPROT INPUT 2-16
DEFAULT: Off
Range: Off, On, Latest/Off, Latest/On
Summary of Contents for b30
Page 10: ...x B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TABLE OF CONTENTS ...
Page 486: ...5 278 B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Page 616: ...iv B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...
Page 632: ...xvi B30 BUS DIFFERENTIAL SYSTEM INSTRUCTION MANUAL INDEX ...