GE Multilin 565, Инструкция по эксплуатации

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5-15
Location Message Line Description
S 2.7
PHASE O/C ALARM
DISABLED
This message allows the user to enable or disable the phase overcurrent
alarm. Use the NEXT CHOICE key to select enabled or disabled.
Messages S 2.8 to 2.10 will only appear if ENABLED is selected in message S 2.7.
S 2.8
PHASE O/C ALARM
LEVEL 1.5 X P/U
This is the value of current flowing in any phase which will cause the Relay
to initiate an alarm. This value is entered as a multiple of the phase timed
overcurrent pickup level chosen in message S 2.3. Values can be entered
in these ranges:
1). 0.5 to 3 in steps of 0.1.
If a value which is not an exact multiple of 0.1 or 0.5 is entered, the 565
Relay will select the closest number to the value entered, display and use
it. For example, if 1.4 is entered then a value of 1.5 will be displayed and
used by the 565 Relay. Attempting to enter a value outside these ranges
will cause an OUT OF RANGE error message to flash.
Choose alarm values lower than the trip pickup levels by an amount which
will give adequate warning of impending problems. For example a value of
80% of the phase timed overcurrent level might be chosen, and 0.8 would
be entered here. A level of 1 times pickup can be programmed. The LCD
will then indicate when the Relay is operating above pickup.
S 2.9
PHASE O/C ALARM
DELAY 1 SEC
The value of the timed overcurrent alarm delay is entered here in the range
of 1 to 255, in steps of 1 second. The purpose of the time delay is to
prevent alarms due to momentary high currents which occur when large
equipment is switched on or off the feeder. If the current drops below the
alarm setting before the time delay which you select, no alarm will be
initiated.
S 2.10
PHASE O/C ALARM
RELAY AUX1
This message allows the user to select the relay which the alarm gener-
ated in message S 2.8 will activate.
S 2.11
PHASE INST TRIPS
ENABLED
This setpoint allows the user to enable or disable the phase instantaneous
trip protection in the 565 and 575.
Messages S 2.12 to 2.14 will only appear if ENABLED is selected in message S 2.11.
S 2.12
PHASE INST TRIP
LEVEL 3.0 X P/U
The instantaneous overcurrent trip level for all phases is entered here as
a multiple of the pickup level already set in message S 2.3. The range is 1
to 18 in steps of 0.5. This feature protects the feeder from sudden very high
currents which cannot be tolerated without machine damage.
For example, if the phase overcurrent pickup level was 100 Amps, and a
setting of 5 was chosen here then a current of 500 or higher amps in any
phase, for longer than the time specified in the next message will cause a
trip signal to be produced by the 565/575 Relay.
L
A
L
A
L
A
L
A
(575)
PHASE HISET INST
TRIPS ENABLED
(575)
PHASE HISET INST
TRIPS 3.0 X P/U
SETPOINTS MODE - PHASE CURRENT