Direct Inputs And Outputs - GE L30 Instruction Manual

CHAPTER 5: SETTINGS
The three sources of commands each activates the
RESET
command also creates its individual operand
the command. Each of these three operands generates an event in the event record when activated. The
setting here selects the operand that activates the

5.9.6 Direct inputs and outputs

5.9.6.1 Overview
The relay provides eight direct inputs conveyed on communications channel 1 (numbered 1-1 through 1-8) and eight direct
inputs conveyed on communications channel 2 (on three-terminal systems only, numbered 2-1 through 2-8). The user
must program the remote relay connected to channels 1 and 2 of the local relay by assigning the desired FlexLogic
operand to be sent via the selected communications channel.
This relay allows the user to create distributed protection and control schemes via dedicated communications channels.
Some examples are directional comparison pilot schemes and transfer tripping. Note that failures of communications
channel affect direct input/output functionality. The 87L function must be enabled to utilize the direct inputs.
Direct input and output FlexLogic operands to be used at the local relay are assigned as follows:
• Direct input/output 1-1 through direct input/output 1-8 for communications channel 1
• Direct input/output 2-1 through direct input/output 2-8 for communications channel 2 (three-terminal systems only)
On the two-terminal, two channel system (redundant channel), direct outputs 1-1 to 1-8 are sent over both channels
simultaneously and are received separately as direct inputs 1-1 to 1-8 at channel 1 and direct inputs 2-1 to 2-8 at channel
2. Therefore, to take advantage of redundancy, the respective operands from channel 1 and 2 can be ORed with FlexLogic
or mapped separately.
5.9.6.2 Direct inputs
SETTINGS  INPUTS/OUTPUTS  DIRECT  DIRECT INPUTS
 DIRECT INPUTS

— Selects the logic state of this particular bit used for this point if the local relay has just
DIRECT INPUT 1-1(8) DEFAULT
completed startup or the local communications channel is declared to have failed. Setting
"On" means that the corresponding local FlexLogic operand
communications channel failure. When the channel is restored, the operand logic state reflects the actual state of the
corresponding remote direct output.
5.9.6.3 Direct outputs
SETTINGS  INPUTS/OUTPUTS  DIRECT  DIRECT OUTPUTS
 DIRECT OUTPUTS

L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
RESET OP
RESET OP (PUSHBUTTON)
RESET OP (OPERAND)
DIRECT INPUT 1-1

DEFAULT: Off

DIRECT INPUT 1-8

DEFAULT: Off
DIRECT INPUT 2-1

DEFAULT: Off

DIRECT INPUT 2-8

DEFAULT: Off
(DIRECT I/P
DIRECT OUTPUT 1-1:

Off

DIRECT OUTPUT 1-8:

Off
FlexLogic operand. Each individual source of a
, , or
RESET OP (COMMS) RESET OP (OPERAND)
operand.
Range: Off, On
Range: Off, On
Range: Off, On
Range: Off, On
DIRECT INPUT 1-1(8) DEFAULT
1-1(8)) has logic state "1" on relay startup or during
Range: FlexLogic operand
Range: FlexLogic operand
INPUTS/OUTPUTS
RESET
to identify the source of
RESET OPERAND
to
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