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CHAPTER 6: SETPOINTS
Emergency restart
CAUTION:
Lockout reset (86)
Reset
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
EMERGENCY RESTART
Range: Off, Contact Input 1 to 10, Virtual Input 1 through 32, Logic element 1 through 16,
Remote Input 1 to 32
Default: Off
All relay protection is defeated while the Emergency Restart contact input is closed.
Emergency restart is for use in situations where continuation of the process driven by
the motor is more important than protecting the motor itself. Closing this contact input
discharges the thermal capacity used register to zero, resets the Starts/Hour Block
count, resets the Time Between Starts Block timer, and resets all trips and alarms so that
a hot motor may be restarted. Therefore, while the Emergency Restart contact input
terminals are shorted, the trip output relay will remain in its normal non-trip state. As the
name implies, this feature should only be used in an emergency – using it otherwise
defeats the purpose of the relay, namely, protecting the motor.
LOCKOUT RESET
Range: Off, Contact Input 1 to 10, Virtual Input 1 through 32, Logic element 1 through 16,
Remote Input 1 to 32
Default: Off
Closing this contact input resets any lockouts, as well as any trips or latched alarms
provided that the condition that caused the lockout, alarm or trip is no longer present. If
there is a lockout time pending, the start inhibit output will not reset until the lockout
time has expired.
RESET
Range: Off, Contact Input 1 to 10, Virtual Input 1 through 32, Logic element 1 through 16,
Remote Input 1 to 32
Default: Off
Reset allows a pushbutton or other device located external to the relay to perform the
same functions as the reset pushbutton on the relay faceplate. Closing this contact input
resets any trips or latched alarms provided that the condition that caused the alarm or
trip is no longer present. Lockouts and start inhibits are also reset if the lockout reset
setting is Off.
S4 CONTROLS
6–139
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