GE 750 User Manual

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6
750/760 Feeder Management Relay GE Power Management
5.4 MESSAGES 5 FRONT PANEL OPERATION
5
Table 5–1: SELF-TEST WARNINGS
ERROR SEVERITY DESCRIPTION
A/D Virtual Ground Major This warning is caused by a failure of the analog to digital converter. The
integrity of system input measurements is affected by this failure.
Analog Output +32V Minor Caused by the loss of the +32 V DC power supply used to power analog
outputs. Analog output currents are affected by this failure.
Clock Not Set Minor Occurs if the clock has not been set.
Dry Contact +32V Minor Caused by the loss of the +32 V DC power supply used to power dry
contacts of logic inputs. Logic inputs using internal power are affected
by this failure.
EEPROM Corrupt Major This warning is caused by detection of corrupted location(s) in the relay
data memory which cannot be self-corrected. Any function of the relay is
susceptible to malfunction from this failure.
Factory Service Major This warning occurs when the relay is in factory service mode.
FLASH Corrupt Major This warning is caused by detection of a corrupted location in the
program memory as determined by a CRC error checking code. Any
function of the relay is susceptible to malfunction from this failure.
Force Analog Out Minor Occurs when the setpoint
FORCE ANALOG OUTPUTS FUNCTION
is set to
Enabled
.
Force Relays Minor Occurs when the setpoint
FORCE OUTPUT RELAYS FUNCTION
is set to
Enabled
.
Internal RS485 Minor Caused by a failure of the internal RS485 communication link. Attempts
to read Actual Values or write Setpoints will produce unpredictable
results.
Internal Temp Minor Caused by the detection of unacceptably low (less than –40°C) or high
(greater than +85°C) temperatures detected inside the unit.
IRIG-B Failure Minor This warning is caused when IRIG-B time synchronization has been
enabled but the signal cannot be decoded.
Not Calibrated Minor This warning occurs when the relay has not been factory calibrated.
Pickup Test Minor Occurs when the setpoint
PICKUP TEST FUNCTION
is set to
Enabled
.
Prototype Software Minor Occurs when prototype software has been loaded into the relay.
Relay Not Ready Minor This warning occurs when the installation setpoint
750/760 OPERATION
has not been set to
Ready
.
RTC Crystal Minor This warning is caused by a failure of the Real Time Clock circuit. The
ability of the relay to maintain the current date and time is lost.
Simulation Mode Minor This warning occurs when the simulation feature of the relay is active.

GE 750 Specifications

General

Brand	GE
Model	750
Category	Relays
Language	English