5-26
Location Message Line Description
S 4.27
TRIP RELAY
PULSED
This display indicates that the Trip relay is ready to have its mode of
operation set up. This controls whether the relay will operate in a pulsed or
latched mode, as follows:
Pulsed Operation
If pulsed operation is selected, the Trip relay is energized and the pulse
timer is initiated upon a trip declaration. If the fault current drops below pick
up before the pulse timer expires, this is taken as an indication that the
breaker has opened successfully. In this case, the Trip relay will become
de-energized when the pulse time does expire. Note that this pulse time,
which is programmed in message S4.30, 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, the relay
will remain energized. When the fault current eventually drops below pick
up, the 565 seal-in timer is initiated. After this 2.5 - 3.5 cycle seal-in delay
elapses, the Trip relay de-energizes.
NOTE: The 565 relays are not designed to regularly break inductive
current. Pulsed relay becomes latched to act as the seal-in
contact as used in electromechanical relays.
CONDITION OUTPUT TRIP RELAY FACEPLATE TRIP LED MODBUS READ EXCEPTION STATUS
NO TRIP DE-ENERGIZED OFF 00H
TRIPPED
(Current > P/U)
ENERGIZED ON 88H
TRIPPED
(Current < P/U)
DE-ENERGIZED FLASHING 08H
KEYPAD RESET DE-ENERGIZED OFF 00H
Latched Operation
If latched operation is chosen for the Trip relay, it will energize when a trip
occurs. Pressing the RESET key on the front panel will unlatch the Trip
relay only if the current is below the programmed trip level. This may be
convenient if the relay is being used to annunciate a fault condition.
CONDITION OUTPUT TRIP RELAY FACEPLATE TRIP LED MODBUS READ EXCEPTION STATUS
NO TRIP DE-ENERGIZED OFF 00H
TRIPPED
(Current > Trip Level)
ENERGIZED ON 88H
TRIPPED
(Current < Trip Level)
ENERGIZED ON 88H
KEYPAD RESET DE-ENERGIZED OFF 00H
Message S 4.28will only appear if pulsed operation is assigned to the Trip relay.
S 4.28
TRIP RELAY PULSE
TIME 0.6 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.
NOTE: The 565 Trip relay does not look at the status of the 52a/52b
(565)
(575)
AUX 1 RELAY
PULSED
(565)
SETPOINTS MODE - CONFIGURATION
To Next Page
Loading...
