MPTTR Settings - Arc protection - Motor protection - Feeder protection - Back-up protection - Technical Manual - REX610 Protection and control - Relion Protection and Control - 1.2 - IEC - ANSI - 12.12.2023

REX610 Technical Manual

Table 1. MPTTR Group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Time constant normal 80...4000 s 1 320 Motor time constant during the normal operation of motor
Time constant start 80...4000 s 1 320 Motor time constant during the start of motor
Time constant stop 80...60000 s 1 500 Motor time constant during the standstill condition of motor
Env temperature Set -20.0...70.0 °C 0.1 40.0 Ambient temperature used when no external temperature measurement available
Alarm thermal value 50.0...100.0 % 0.1 95.0 Thermal level above which function gives an alarm
Restart thermal Val 20.0...80.0 % 0.1 40.0 Thermal level above which function inhibits motor restarting
Overload factor 1.00...1.20 0.01 1.05 Overload factor (k)
Negative Seq factor 0.0...10.0 0.1 0.0 Heating effect factor for negative sequence current
Weighting factor p 20.0...100.0 % 0.1 50.0 Weighting factor (p)
Env temperature mode

1=FLC Only

2=Use input

3=Set Amb Temp

1=FLC Only Mode of measuring ambient temperature
Table 2. MPTTR Non group settings (Basic)
Parameter Values (Range) Unit Step Default Description
Operation

1=on

5=off

1=on Operation Off / On
Table 3. MPTTR Non group settings (Advanced)
Parameter Values (Range) Unit Step Default Description
Initial thermal Val 0.0...100.0 % 0.1 74.0 Initial thermal level of the motor
Current reference 0.30...2.00 xIn 0.01 1.00 Rated current (FLC) of the motor