GE Multilin 565 Instruction Manual page 63

Location Message Line
Message S 3.7 will not appear if CUSTOM CURVE is selected in message S 3.6.
GROUND O/C TIME
S 3.7
DIAL
GROUND O/C RELAY
S 3.8
GROUND O/C ALARM
S 3.9
DISABLED
L
A
Messages S 3.10 to 3.12 will only appear if ENABLED is selected in message S 3.9.
GND O/C ALARM
S 3.10
LEVEL
L
A
GND O/C ALARM
S 3.11
DELAY
L
A
GND O/C ALARM
S 3.12
RELAY
L
A
S 3.13
GROUND INST
TRIPS ENABLED
GND HISET INST
TRIPS ENABLED
(575)
Messages S 3.14 to 3.16 will only appear if ENABLED is selected in message S 3.13.
S 3.14
GND HISET TRIP
LEVEL 3.0 X P/U
GND HISET INST
TRIP 3.0 X P/U
(575)
Description
The ground overcurrent time dial number is entered here. This allows the
1
user to select a curve to match the system requirements. Refer to the "Use
of standard curves" in section 3 to determine the correct curve and select
it by entering its number here. Any number between 1 and 32 may be
entered.
This message allows the user to select the relay which the ground
TRIP
overcurrent trip will activate.
This message asks if you want the ground overcurrent alarm ENABLED or
DISABLED.
The ground overcurrent alarm level is entered here as a multiple of the
1.5 X P/U
pickup level. The range of values allowed is 0.5 to 3 in steps of 0.1. This
setpoint sets the level of ground current at which the 565 Relay initiates an
alarm. A level of 1 times pickup can be programmed. The LCD will then
indicate when the Relay is operating above pickup.
For example, if 0.5 is entered here, then the 565 Relay will initiate an alarm
when the ground current reaches 50% of the pickup level entered in
message S 3.5. Determine the alarm level for your application by referring
to the feeder design specifications. The alarm must be far enough below
the trip setting to allow corrective action to be taken.
The time delay for the ground alarm is entered here. This feature prevents
1 SEC
the alarm for the timed period and stops nuisance alarms due to momen-
tary high ground currents. Should the alarm condition persist beyond the
timed period the alarm will occur. The range for this setpoint is 1 to 255
seconds in steps of 1 second.
This message allows the user to select the relay which the alarm signal
AUX1
generated in message S 3.10 will activate.
This message asks if you want the ground instantaneous trip ENABLED or
DISABLED.
NOTE: This setpoint must be enabled and a proper trip level must be
The instantaneous ground current trip level is entered here as a multiple of
the pickup level already chosen in message S 3.5. This feature protects the
feeder from sudden very high ground current. For example, say the ground
pickup level is 50 amps, and a setting of 2 was chosen here. If a ground
current of 100 or more amps lasts for longer than the time delay set in
message S 3.15, then a trip signal will be produced by the 565 Relay. The
range of the ground current protection will be set by the value of the ground
overcurrent pickup level. In addition, the pickup level selects the appropri-
SETPOINTS MODE - GROUND CURRENT
selected if a pickup level has been selected greater than 100% of
CT (5A tap only). See caution in section "Protection Application
Information."
5-19