Table 43. Three-phase thermal overload protection for motors (MPTTR) main settings
Parameter Function Value (Range) Step
Env temperature
mode
MPTTR FLC Only
Use RTD
Set Amb Temp
-
Env temperature set MPTTR -20.0...70.0 deg 0.1
Alarm thermal value MPTTR 50.0...100.0 % 0.1
Restart thermal value MPTTR 20.0...80.0 % 0.1
Overload factor MPTTR 1.00...1.20 0.01
Weighting factor p MPTTR 20.0...100.0 0.1
Time constant normal MPTTR 80...4000 s 1
Time constant start MPTTR 80...4000 s 1
Table 44. Motor start-up supervision (STTPMSU)
Characteristic
Value
Operation accuracy At the frequency f = f
n
±1.5% of the set value or ±0.002 × I
n
Start time
1)2)
I
Fault
= 1.1 × set Start
detection A
Typical 25 ms (± 15ms)
Operate time accuracy ±1.0% of the set value or ±20 ms
Reset ratio Typical 0.90
1) Current before = 0.0 x I
n
, f
n
= 50 Hz, overcurrent in one phase
2) Includes the delay of the signal output contact
Table 45. Motor start-up supervision (STTPMSU) main settings
Parameter
Function Value (Range) Step
Motor start-up A STTPMSU 1.0...10.0 pu 0.1
Motor start-up time STTPMSU 0.3...80.0 s 0.1
Lock rotor time STTPMSU 2.0...120.0 s 1.0
Operation mode STTPMSU IIt
IIt, CB
IIt & stall
IIt & stall, CB
-
Restart inhibit time STTPMSU 0...250 min 1
Motor Protection and Control 1MRS756977 D
REM630
Product version: 1.1 Issued: 2011-05-18
36 ABB
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