5-27
Location Message Line Description
contacts.
Message S 4.29 will only appear if pulsed operation is assigned to the Aux. 1 relay.
S 4.29
AUX1 RELAY PULSE
TIME 0.1 SEC
This message allows the user to set the length of the pulse for the Trip relay
when selected for pulse operation. The pulse time controls the minimum
length of time that the relay will be energized. The range of values for this
setpoint is 0.1 to 0.6 seconds in steps of 0.1 seconds. Aux. 1 will act as Trip
Annunciate with Trip & Aux. 1 acting together when a trip function is
programmed to Trip & Aux. 1.
S 4.30
AUX 2 RELAY
UNLATCHED
As with the Aux. 1 relay, this setpoint allows the mode of operation for the
Aux. 2 relay to be selected. The available modes are pulsed, latched or
unlatched.
S 4.31
AUX 1 RELAY
UNLATCHED
This setpoint allows the user to select the mode of operation for the Aux 1
relay. The available modes are pulsed, latched, or unlatched. If the Aux 1
relay is programmed as pulsed,
only trip conditions should be assigned to
it. When programmed in this pulsed mode, Aux 1 is intended to be used as
a trip follower. Alarm conditions assigned to a pulsed Aux 1 will only reset
if the breaker is open.
Pulsed Operation
If pulsed operation is selected, the Aux 1 relay is energized and the pulse
timer is initiated upon a trip/alarm declaration. In order for the 565 to
determine that the breaker has opened successfully, two conditions must
be met. First, the fault current must be below pick up. Secondly, either the
52a contact must be detected as open or the 52b contact must be
detected as closed. When this happens before the pulse timer expires, the
Aux 1 relay will become de-energized when the pulse time does expire.
Note that this pulse time which is programmed in message S4.32 will be
the minimum amount of time that the trip relay will remain energized. On
the other hand, if the pulse timer expires before the fault current drops
below pick up and the 52a/52b contacts respond, the relay will remain
energized. When these two conditions eventually occur, the 565 seal-in
timer is initiated. After this 2.5 - 3.5 cycle seal-in delay elapses, the Aux 1
relay de-energizes.
CONDITION
OUTPUT AUX. 1
RELAY
FACEPLATE
AUX. 1 LED
MODBUS READ EXCEPTION
STATUS
NO TRIP DE-ENERGIZED OFF 00H
TRIPPED
(Current > P/U)
ENERGIZED ON 44H
TRIPPED
(Current < P/U)
(Brkr. Open)
DE-ENERGIZED FLASHING 04H
KEYPAD RESET DE-ENERGIZED OFF 00H
(575)
(575)
(565)
SETPOINTS MODE - CONFIGURATION
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