GE 339

6–166 339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
S5 INPUTS/OUTPUTS CHAPTER 6: SETPOINTS
Figure 6-77: Contactor: Wiring for Start Inhibit and Trip (Failsafe) – INPUT/OUTPUT
Option ‘R’
Output Relay 2 Alarm - Input/Output “R”
Any Alarm condition will activate the Form-A ALARM relay. The ALARM relay is selectable
for either Non-Failsafe or Failsafe operation. If an alarm indication is required only while
an alarm is present, select Unlatched. With the Unlatched output type, once an alarm
condition is cleared, the alarm and associated message automatically clear. To ensure all
alarms are acknowledged, select Latched. If an alarm condition is no longer present, the
Latched Alarm relay can be cleared only by a Reset command.
PATH:
SETPOINTS > S5 INPUTS/OUTPUTS > OUTPUT RELAYS > RLY 2 ALARM
RELAY OPERATION
Range: Non-Failsafe, Failsafe
Default: Non-Failsafe
OUTPUT TYPE
Range: Self-Reset, Latched
Default: Self-Reset
Auxiliary Output Relay 3 - Input/Output “R”
When the setting S2 SYSTEMS SETUP > SWITCHING DEVICE is selected as CONTACTOR, there
is one output relay (Output Relay 3) available for customer-specific requirements. The
Auxiliary relay can be selected as either Self-Reset or Latched. If the Self-Reset output
type is selected, this relay will be energized as long as the element is in operating mode
and will reset when the element drops out. If the Latched type is selected, the output relay
will stay energized after the element dropout, and will be de-energized upon the Reset
command. The Auxiliary relay can also be selected as either Non-Failsafe or Failsafe. If an
output is required when the 339 is not operational due to a loss of control power, select
Failsafe operation, otherwise choose Non-Failsafe. Note that the Auxiliary relay is
defaulted to operate when a Start Inhibit is active, this is selectable with setting
S4
CONTROLS > START INHIBIT > OUTPUT RELAY 3
. If the Auxiliary relay is to be controlled by
the Start Inhibit feature, it is recommended that the Output Type be set to Self-Reset.
PATH:
SETPOINTS > S5 INPUTS/OUTPUTS > OUTPUT RELAYS > RLY 3 AUXILIARY
RELAY OPERATION
Range: Non-Failsafe, Failsafe
Default: Non-Failsafe
OUTPUT TYPE
Range: Self-Reset, Latched
Default: Self-Reset
Control Power
START
START INHIBIT
(Output Relay 3:
Fail safe)
Close
Coil
896849A1.cdr
STOP
TRIP
(Output Relay 1:
Fail safe)
Motor Seal-in
Contact