GE Industrial Solutions Spectra RMS Molded Case - Manual (Page 22)

GEH-702 Users Manual
21
The range of available settings for Load Alarm OFF is
0.50 to 0.95 in increments of 0.05. This value multiplied
by the ampere rating “C” establishes the current that
the Load Alarm relay returns to its original state. The
Load Alarm OFF setting must always be less than the
Load Alarm ON setting.
Input/Output Relays (Optional)
Breakers that are optioned with a 20-Pin harness are
enabled with an Input Relay function. If the Reduced
Energy Let-Through (RELT) function is also optioned,
then the input relay is dedicated to a RELT input signal
and there will be no setup screen. If the RELT function
is not optioned, then the input relay can be used as a
shunting device to trip the breaker. A 24Vac/Vdc signal
is required. The available settings are TRIP or OFF.
Breakers that are optioned with a 20-Pin harness are
enabled with two programmable output relays. These
relays are used as a signaling means for functions such
as ground fault alarm, reduced energy let-through,
zone selective interlocking, protective relays, load
alarm, health status, or an overcurrent trip condition.
For trip units optioned with reduced energy let-through
(RELT), RELAY 2 is dedicated to the RELT output function.
In the setup mode, there are six groups assigned to
RELAY 1 and RELAY 2. The table below describes the
function associated with each group.
Table 18. Output Relay Group Assignments
Relay 1 & 2 Setup Options Assignment
Group 1 Ground Fault Alarm
Group 2 Over Current Trip
Group 3 Protective Relay Trip
Group 4 Load Alarm (Load Shedding)
Group 5 Health Status
Group 6 RELT
Relays 1 and 2 will change state in the event that the
function assigned to that relay experiences an event.
The relays are rated 1 amp, 60Vac/Vdc. The Group 5
“Health Status” assignment will cause a contact closure
in the event that the trip unit’s self-diagnostic feature
detects that the trip unit has malfunctioned.
Waveform Capture (Optional)
When a fault has taken place, it is important to visualize
the event. The Waveform Capture option included in the
advanced trip unit can track and visualize any fault
event. The device tracks eight cycles, four before and
four after the event, with resolution of
48 samples per cycle at 60Hz, and stores the results in
memory. It registers events in all three phases and the
neutral. After the event, the waveform is stored in
COMTrade format and can be accessed by using the
waveform client module of the EnerVista software.
The available setup options for this feature are as follows:
Table 19. Waveform Capture Setup
Setup Options Disable Manual Over Current Prot . Relay
Option 1 X
Option 2 X
Option 3 X
Option 4 X
Option 5 X X
Option 6 X X
Option 7 X X
Option 8 X X X
Each recording event overwrites the previously stored
data. A Modbus command is required to trigger
Manual waveform capture. An outside source of 24Vdc
control power is required for communications and
waveform capture.
Frequency (Standard)
This set point establishes the system frequency. The
available settings for frequency are 50 Hz and 60 Hz.
Potential Transformer Primary Voltage (Optional)
This set point establishes the primary voltage rating of
the potential transformers. The PT Voltage value is used
in calculations for the metering function. The available
range of potential transformer primary voltage is 100
to 690 in steps of 1.
Potential Transformer Connection (Optional) This set
point establishes how voltage and power options are
displayed in the metering mode. The available choices
for potential transformer connection are PH-PH (phase-
to-phase) or PH-N (phase-to-neutral).