GE UR series User Manual

5-14 L60 Line Phase Comparison System GE Multilin
5.2 PRODUCT SETUP 5 SETTINGS
5
CT primary = “100 A”, and
VT primary = PHASE VT SECONDARY x PHASE VT RATIO = 66.4 V x 208 = 13811.2 V
The power cut-off is therefore:
power cut-off = (
CURRENT CUT-OFF LEVEL × VOLTAGE CUT-OFF LEVEL × CT primary × VT primary)/VT secondary
= ( × 0.02 pu × 1.0 V × 100 A × 13811.2 V) / 66.4 V
= 720.5 watts
Any calculated power value below this cut-off will not be displayed. As well, the three-phase energy data will not accumu-
late if the total power from all three phases does not exceed the power cut-off.
Lower the
VOLTAGE CUT-OFF LEVEL and CURRENT CUT-OFF LEVEL with care as the relay accepts lower signals
as valid measurements. Unless dictated otherwise by a specific application, the default settings of “0.02
pu” for
CURRENT CUT-OFF LEVEL and “1.0 V” for VOLTAGE CUT-OFF LEVEL are recommended.
5.2.3 CLEAR RELAY RECORDS
PATH: SETTINGS Ö PRODUCT SETUP ÖØ CLEAR RELAY RECORDS
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 L60 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
SETTINGS Ö PRODUCT SETUP
ÖØ CLEAR RELAY RECORDS menu:
CLEAR DEMAND: “PUSHBUTTON 1 ON”
2. Set the properties for User-Programmable Pushbutton 1 by making the following changes in the
SETTINGS Ö PRODUCT
SETUP
ÖØ USER-PROGRAMMABLE PUSHBUTTONS Ö USER PUSHBUTTON 1 menu:
PUSHBUTTON 1 FUNCTION: “Self-reset”
PUSHBTN 1 DROP-OUT TIME: “0.20 s”
 CLEAR RELAY
 RECORDS
CLEAR FAULT REPORTS:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR EVENT RECORDS:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR OSCILLOGRAPHY?
No
Range: FlexLogic™ operand
MESSAGE
CLEAR DATA LOGGER:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR ARC AMPS 1:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR ARC AMPS 2:
Off
Range: FlexLogic™ operand
MESSAGE
RESET UNAUTH ACCESS:
Off
Range: FlexLogic™ operand
MESSAGE
CLEAR DIR I/O STATS:
Off
Range: FlexLogic™ operand.
Valid only for units with Direct I/O module.
3
NOTE

GE UR series Specifications

General

Brand	GE
Model	UR series
Category	Relays
Language	English