Setting Group Control - GE D90 Plus Instruction Manual

CONTROL ELEMENTS

Setting group control

320
• A fault is not seen in the forward zone 2 distance elements or ground directional
forward function (if configured) for at least 100 ms.
• The reverse zone 4 distance elements or ground directional reverse function (if
configured) did not pickup to set the transient blocking.
If all of these conditions are met, then the directional comparison unblocking scheme will
echo (transmit the
DCUB TX1
signals back to the remote relay based on the echo table.
The keying or transmit signals
echo keying conditions.
The
DCUB TRIP A, DCUB TRIP
to the trip output scheme. As such, if the trip output or breaker control operands (if the
breaker control function is used) are used for tripping, the scheme fully operational. The
permissive key carrier signals DCUB TX1 through DCUB TX4 must still be assigned to the
tripping or operating logic, and to output contacts as per the usual D90
output assignments.
The setting groups control function activates and deactivates of up to six setting groups.
Select the Settings > Protection > Control > Setting Group Control menu item to access
the setting group control settings.
Figure 261: Setting group control configuration
The following settings are available for setting groups control.
Function
Range: Enabled, Disabled
Default: Disabled
This setting is used to enable and disable the setting groups control functionality.
Block
Range: any FlexLogic™ operand or shared operand
Default: OFF
This setting prevents the active setting group from changing when the assigned operand
is asserted. This can be useful in applications where it is undesirable to change the
settings under certain conditions, such as the breaker being open.
through operands) the received permissive DCUB RX
DCUB TX4
through
DCUB TX1 DCUB TX4
C, and
B, DCUB TRIP DCUB TRIP 3P
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: PROTECTION
consist of all normal keying or
output operands are hard-wired
Plus
logic and