Section 4
1MAC050144-MB C
Protection functions
216
615 series ANSI
Technical Manual
4.1.11.8
Monitored data
Table 209: 37 Monitored data
4.1.11.9
Technical data
Table 210: 37 Technical data
4.1.12
Motor stall protection 51LR
4.1.12.1
Identification
4.1.12.2
Function block
Figure 101:
Function block
4.1.12.3
Functionality
The stalled motor protection 51LR 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 51LR
is normally blocked during the startup period. When the motor has passed the starting
phase, 51LR monitors the magnitude of phase currents. The function starts when the
Name
Type
Values (Range)
Unit Description
PICKUP_DUR
FLOAT32
0.00...100.00
%
Ratio of pickup time / trip time
37
Enum
1=enabled
2=blocked
3=test
4=test/blocked
5=disabled
Status
Characteristic
Value
Pickup accuracy
Depending on the frequency of the current
measured: f
n
±2Hz
±1.5% of the set value or ±0.002 x I
n
Pickup time
Typical 300 ms
Reset time
< 40 ms
Reset ratio
Typical 0.96
Retardation time
< 35 ms
Trip time accuracy in definite time mode
±1.0% of the set value or ±20 ms
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Motor stall protection
JAMPTOC
Ist>
51LR
Содержание 615 Series ANSI
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Страница 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Страница 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
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Страница 707: ...Section 15 1MAC050144 MB C Applicable standards and regulations 700 615 series ANSI Technical Manual ...
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