Graphical Front Panel - GE C70 Instruction Manual

CHAPTER 5: SETTINGS
For Wye connections:
where VT primary = VT secondary × VT ratio and CT primary = CT secondary × CT ratio.
For example, given the following 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 itself and the event record pages are not configurable.
Multiple screens can be opened in the EnerVista software, but the first remains active and the others can be read-only. For
example, the Annunciator Editor and Single Line Diagram Editor can be open and active, then subsequently opened Rolling
Mode and Home Page screens are read-only. Close the windows, then re-open the one required.
C70 CAPACITOR BANK PROTECTION AND CONTROL 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
Eq. 5-4
Eq. 5-5
5
CURRENT
5-27