Motor Load Jam Protection Jamptoc - ABB RELION 620 Series Technical Manual

1MRS757644 H
4.1.7.9 Technical data
Table 340: T2PTTR Technical data
Characteristic
Operation accuracy
Operate time accuracy
4.1.7.10 Technical revision history
Table 341: T2PTTR Technical revision history
Technical revision
B
C
D
4.1.8

Motor load jam protection JAMPTOC

4.1.8.1 Identification
Function description
Motor load jam protection
4.1.8.2 Function block
Figure 173: Function block
4.1.8.3 Functionality
The motor load jam protection function JAMPTOC is used for protecting the motor
in stall or mechanical jam situations during the running state.
When the motor is started, a separate function is used for the startup protection,
and JAMPTOC is normally blocked during the startup period. When the motor has
1
Overload current > 1.2 x Operate level temperature
620 series
Technical Manual
Value
Depending on the frequency of the measured current: f
Hz
Current measurement: ±1.5% of the set value or ±0.002 x I
(at currents in the range of 0.01...4.00 x I
±2.0% of the theoretical value or ±0.50 s
Change
Added the
AMB_TEMP
Internal improvement.
Internal improvement.
IEC 61850 IEC 60617
identification identification
JAMPTOC Ist>
Protection functions
±2
n
n
)
n
input
ANSI/IEEE C37.2
device number
51LR
351