Graphical Front Panel - GE L90 Instruction Manual

CHAPTER 5: SETTINGS
: "0.02 pu"
CURRENT CUT-OFF LEVEL
: "1.0 V"
VOLTAGE CUT-OFF LEVEL
: "100 A"
PHASE CT PRIMARY
: "66.4 V"
PHASE VT SECONDARY
: "208.00 : 1"
PHASE VT RATIO
: "Delta"
PHASE VT CONNECTION
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
= ( × 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 does not display. As well, the three-phase energy data do not accumulate if
the total power from all three phases does not exceed the power cut-off.
Lower the
VOLTAGE CUT-OFF LEVEL
measurements. Unless dictated otherwise by a specific application, the default settings of "0.02 pu" for
and "1.0 V" for
CUT-OFF LEVEL

5.3.3 Graphical front panel

The graphical front panel is a hardware option. See the Order Codes section in chapter 2 for details.
Use the EnerVista software to configure the graphical front panel. The settings are not accessible from the graphical front
panel.
The following screens are available:
• Home page
• Rolling mode
• Metering editor
• Single-line diagram editor
• Annunciator editor
• Configurable navigation
The settings menu and the event record pages are not configurable.
5.3.3.1 Home page
This page sets the display on the home page and the date and time formats for all pages. Options include display of
product information, alarms, actual values, and event records.
The path is Settings > Product Setup > Graphical Panel > Home Page. The menu does not display when there is no
graphical front panel.
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
x = 66.4 V x 208 = 13811.2 V
PHASE VT RATIO
×
OLTAGE CUT-OFF LEVEL
V
and
CURRENT CUT-OFF LEVEL
are recommended.
VOLTAGE CUT-OFF LEVEL
× CT primary × VT primary)/VT secondary
with care as the relay accepts lower signals as valid
PRODUCT SETUP
CURRENT
5
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