Monitored Data; Technical Data; Differential Protection; Motor Differential Protection 87M - ABB RELION 620 Series Technical Manual

Section 4
Protection functions
4.5.3.8
4.5.3.9
4.6
4.6.1
4.6.1.1
404

Monitored data

Table 331: 49M Monitored data
Name Type
TEMP_RL FLOAT32
THERMLEV_ST FLOAT32
THERMLEV_END FLOAT32
T_ENARESTART INT32
49M Enum

Technical data

Table 332: 49M Technical data
Characteristic
Operation accuracy
1)
Trip time accuracy
1) Overload current > 1.2 x Operate level temperature

Differential protection

Motor differential protection 87M

Identification

Function description
Motor differential protection
Values (Range) Unit
0.00...9.99
0.00...9.99
0.00...9.99
0...99999 s
1=Enabled
2=blocked
3=test
4=test/blocked
5=Disabled
Value
Depending on the frequency of the measured
current: f ±2 Hz
n
Current measurement: ±1.5% of the set value or
±0.002 x I (at currents in the range of 0.01...4.00 x
n
I )
n
±2.0% of the theoretical value or ±0.50 s
IEC 61850 IEC 60617
identification identification
MPDIF 3dI>M
1MAC504801-IB E
Description
The calculated temperature of
the protected object relative to
the trip level
Thermal level at beginning of
motor startup
Thermal level at the end of
motor startup situation
Estimated time to reset of
block restart
Status
ANSI/IEEE C37.2
device number
87M
620 series ANSI
Technical Manual