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
Summary of Contents for 615 Series ANSI
Page 1: ...Relion Protection and Control 615 series ANSI Technical Manual ...
Page 2: ......
Page 29: ...1MAC050144 MB C Section 615 series ANSI 22 Technical Manual ...
Page 389: ...Section 4 1MAC050144 MB C Protection functions 382 615 series ANSI Technical Manual ...
Page 485: ...Section 6 1MAC050144 MB C Supervision functions 478 615 series ANSI Technical Manual ...
Page 635: ...Section 10 1MAC050144 MB C Other functions 628 615 series ANSI Technical Manual ...
Page 711: ...Section 16 1MAC050144 MB C Glossary 704 615 series ANSI Technical Manual ...
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