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CHAPTER 4: ACTUAL VALUES
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
TIME-BTWN-START
Time in seconds left until the Time Between Starts feature's inhibit expires. Has a value
of zero if this feature is set to OFF, or if the time has expired.
RESTART INHIBIT
Time in seconds left until the Restart Timer feature's inhibit expires. Has a value of zero if
this feature is set to OFF, or if the time has expired.
MOTOR LOCKOUT TIME
Displays the longest lockout time among the following 5 timers: THERMAL INHIBIT,
STARTS/HOUR INHIBIT, TIME-BETWEEN-STARTS INHIBIT, RESTART INHIBIT and THREMAL
O/L LOCKOUT.
THERMAL O/L LKT
A thermal overload lockout will occur after a thermal overload trip so that the user
cannot start the motor until the TCU drops to 15%. Following a thermal overload trip, this
value indicates how long it will take for the 339 relay TCU to decrease from the current
value to 15%.
CURRENT UNBALANCE
Displays the current unbalance level as a percentage. Refer to the Current Unbalance
section.
HOTTEST STATOR RTD
Displays the temperature of the hottest Stator RTD.
HOTTEST RTD NO.
Indicates the hottest Stator RTD.
MOTOR RUNNING HOUR
Displays the actual motor running time in hours.
MOTOR STARTS NUM
Displays the actual number of motor starts.
EMERG RESTARTS NUM
Displays the actual number of motor Emergency Restarts.
Figure 3: Motor Status logic diagram
SETTI G
Enable Two Speed
= Enabled
CO TACT I PUT
52a Contact Input
52b Contact Input
SETTI GS
52a Contact
= Enabled
52 b Contact
= Enabled
CO TACT I PUT
High Speed Switch
Low Speed Switch
AND
AND
OR
AND
OR
AND
AND
OR
A1 STATUS
AND
OPERA D
OR
Motor Online
AND
896839.cdr
4–5
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