Clear Relay Records - GE D30 Instruction Manual

5.2 PRODUCT SETUP
We have:
CT primary = "100 A", and
VT primary =
PHASE VT SECONDARY
The power cut-off is therefore:
power cut-off = (
CURRENT CUT-OFF LEVEL
= (
= 720.5 watts
Any calculated power value below this cut-off will not be displayed.
Lower the
VOLTAGE CUT-OFF LEVEL
as valid measurements. Unless dictated otherwise by a specific application, the default settings of "0.02
NOTE
pu" for
CURRENT CUT-OFF LEVEL

PATH: SETTINGS PRODUCT SETUP
 CLEAR RELAY
 RECORDS
5
Selected records can be cleared from user-programmable conditions with FlexLogic™ operands. Assigning user-program-
mable pushbuttons to clear specific records are typical applications for these commands. Since the D30 responds to rising
edges of the configured FlexLogic™ operands, they must be asserted for at least 50 ms to take effect.
Clearing records with user-programmable operands is not protected by the command password. However, user-program-
mable pushbuttons are protected by the command password. Thus, if they are used to clear records, the user-programma-
ble pushbuttons can provide extra security if required.
For example, to assign user-programmable pushbutton 1 to clear demand records, the following settings should be applied.
1. Assign the clear demand function to pushbutton 1 by making the following change in the


CLEAR RELAY RECORDS

CLEAR DEMAND:
2. Set the properties for user-programmable pushbutton 1 by making the following changes in the

SETUP USER-PROGRAMMABLE PUSHBUTTONS
PUSHBUTTON 1 FUNCTION:
PUSHBTN 1 DROP-OUT TIME:
5-14
x
PHASE VT RATIO

VOLTAGE CUT-OFF LEVEL
 0.02 pu  1.0 V  100 A  13811.2 V) / 66.4 V
3
and
CURRENT CUT-OFF LEVEL
and "1.0 V" for

CLEAR RELAY RECORDS
CLEAR FAULT REPORTS:
Off
CLEAR EVENT RECORDS:
MESSAGE
Off
CLEAR OSCILLOGRAPHY?
MESSAGE
No
CLEAR ARC AMPS 1:
MESSAGE
Off
CLEAR ARC AMPS 2:
MESSAGE
Off
RESET UNAUTH ACCESS:
MESSAGE
Off
CLEAR DIR I/O STATS:
MESSAGE
Off
menu:
" "
PUSHBUTTON 1 ON
"Self-reset"
"0.20 s"
D30 Line Distance Protection System
= 66.4 V x 208 = 13811.2 V
 CT primary  VT primary)/VT secondary
with care as the relay accepts lower signals
are recommended.
VOLTAGE CUT-OFF LEVEL
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand
Range: FlexLogic™ operand.
Valid only for units with Direct I/O module.
 menu:
USER PUSHBUTTON 1
5 SETTINGS
5.2.3 CLEAR RELAY RECORDS

SETTINGS PRODUCT SETUP

SETTINGS PRODUCT
GE Multilin