ABB RELION REX640 Technical Manual page 421

1MRS759142 F
The value of
thermal capacity of the motor without causing a trip due to a long overload time.
Generally, the prior alarm level is set to a value of 80 to 90 percent of the trip level.
4.1.10.7 Signals
MPTTR Input signals
Table 478: MPTTR Input signals
Name
I3P
BLOCK
START_EMERG
AMB_TEMP
MPTTR Output signals
Table 479: MPTTR Output signals
Name
OPERATE
ALARM
BLK_RESTART
TEMP_RL
4.1.10.8 MPTTR Settings
Table 480: MPTTR Group settings (Basic)
Parameter Values (Range)
Overload factor 1.00...1.20
Alarm thermal value 50.0...100.0
Restart thermal Val 20.0...80.0
Table continues on the next page
REX640
Technical Manual
Alarm thermal value is set to a level which allows the use of the full
Type
SIGNAL
BOOLEAN
BOOLEAN
FLOAT32
Type
BOOLEAN
BOOLEAN
BOOLEAN
FLOAT32
Unit Step
0.01
% 0.1
% 0.1
Protection functions
Default Description
- Three-phase currents
0=False Block signal for acti-
vating the blocking
mode
0=False Signal for indicating
the need for emer-
gency start
0 The ambient temper-
ature used in the cal-
culation
Description
Operate
Thermal Alarm
Thermal overload indicator,
to inhibit restart
The calculated temperature
of the protected object rela-
tive to the operate level
Default
1.05
95.0
40.0
Description
Overload factor (k)
Thermal level above
which function
gives an alarm
Thermal level above
which function in-
hibits motor re-
starting
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