GE Industrial Solutions Spectra RMS Molded Case - Manual (Page 24)

GEH-702 Users Manual
23
Metering Mode
Spectra microEntelliGuard TM breakers are available with
basic and advanced metering options. Basic metering
includes an ammeter that displays phase currents only.
Advanced metering includes an ammeter and voltmeter
and can display energy, real power, apparent power,
and frequency. Current and voltage are computed as
true RMS values. All metering displays are computed
and updated at a rate of one times per second. All
values, except frequency, are displayed to three
significant figures. For example, current might be
displayed as 60.7 amps, 492 amps, or 1.20 kA. The trip
unit must be energized to display metered values (refer
to the power requirements section of this instruction).
Operating Mode
To enter the metering mode from the “home” page
(SETUP, METERING, STATUS, EVENTS) press the UP or
DOWN button until METERING is highlighted and then
push the right button to get into the METERING screens.
Use the RIGHT and LEFT buttons to move to the various
metering options. Use the UP and DOWN buttons to
cycle between phases A, B, and C. The following sections
describe each of the different metering screens.
Current (all trip units)
This screen displays RMS current on phases A, B, and C.
Any current value less than 5% of the breaker’s current
sensor rating is displayed as zero.
Voltage (advanced metering only)
This screen displays RMS current on phases A, B, and C.
The value of voltage displayed depends on how the trip
unit was configured in the SETUP mode (reference the
Potential Transformer Connection section on page
21). If the breaker was configured with line-to-neutral
connections, the display will show individual phase
voltages. If the breaker was configured with line-to-line
connections, the display will show voltages between
phases.
Real Power (advanced metering only)
This screen displays real power on or between phases
A, B, and C. The value of power displayed depends on
how the trip unit was configured in the SETUP mode
(reference the Potential Transformer Connection
section on page 21). If the breaker was configured with
line-to-neutral connections, the display will show the
real power in each phase. If the breaker was configured
with line-to-line connections, the display will show the
aggregate power. Display values will range from 0 to
999 kW or from 1.00 to 999 MW.
Reactive Power (advanced metering only)
This screen displays reactive power on or between
phases A, B, and C. The value of power displayed
depends on how the trip unit was configured in the
SETUP mode (reference the Potential Transformer
Connection section on page 21). If the breaker was
configured with line-to-neutral connections, the display
will show the reactive power in each phase. If the
breaker was configured with line-to-line connections,
the display will show the aggregate power. Display
values will range from 0 to 999 kVAR or from 1.00 to
999 MVAR.
Apparent Power (advanced metering only)
This screen displays apparent power on or between
phases A, B, and C. The value of power displayed
depends on how the trip unit was configured in the
SETUP mode (reference the Potential Transformer
Connection section on page 21). If the breaker was
configured with line-to-neutral connections, the display
will show the apparent power in each phase. If the
breaker was configured with line-to-line connections, the
display will show the aggregate power. Display values
will range from 0 to 999 kVA or from 1.00 to 999 MVA.
Peak Power Demand (advanced metering only) This
screen displays the peak power demand on or between
phases A, B, and C. There are two values displayed on
the peak power screen. The first value shows the power
demand in the most recent interval. The second value
displays the maximum power that has been measured.
Display values will range from 0 to
999 kW or from 1.00 to 999 MW.