9424200996
84-11
BE1-11
m
Settings Calculation Examples
Figure 84-12. Protection, Thermal, RTD Bias Curve Screen
Set the Center RTD Bias Temperature (point 2) to the motor hot running temperature. Recall from the
motor manufacturer data that the insulation is class F and the manufacturer allows an 80
°
C stator
temperature rise. Allow for a 10 percent overage for hot spots. Refer to the Center RTD Bias Temperature
𝐶𝐶𝑠𝑠𝑠𝑠𝑅𝑅𝑠𝑠𝑠𝑠
𝑅𝑅𝐶𝐶𝑅𝑅
𝐵𝐵𝑅𝑅𝐿𝐿𝐴𝐴
𝐶𝐶𝑠𝑠𝐴𝐴𝐴𝐴𝑠𝑠𝑠𝑠𝐿𝐿𝑅𝑅𝐹𝐹𝑠𝑠𝑠𝑠
=
�𝐶𝐶𝑠𝑠𝐴𝐴𝐴𝐴𝑠𝑠𝑠𝑠𝐿𝐿𝑅𝑅𝐹𝐹𝑠𝑠𝑠𝑠
𝑅𝑅𝑅𝑅𝑅𝑅𝑒𝑒
𝑜𝑜𝑜𝑜
𝑆𝑆𝑆𝑆𝑆𝑆𝑆𝑆𝑜𝑜𝑆𝑆
∙
10%
𝐿𝐿𝑜𝑜𝑠𝑠𝑠𝑠𝐿𝐿𝑉𝑉𝑠𝑠�
+
𝐴𝐴𝐴𝐴𝐴𝐴𝑅𝑅𝑠𝑠𝑠𝑠𝑅𝑅
𝐶𝐶𝑠𝑠𝐴𝐴𝐴𝐴𝑠𝑠𝑠𝑠𝐿𝐿𝑅𝑅𝐹𝐹𝑠𝑠𝑠𝑠
= (80°
𝐶𝐶 ∙
1.10) + 40°
𝐶𝐶
= 88°
𝐶𝐶
+ 40°
𝐶𝐶
= 128°
𝐶𝐶
Equation 84-4. Center RTD Bias Temperature
A good starting point for the center point Thermal Capacity (%TC) is the percentage difference between
the Hot Safe Stall Time and the Cold Safe Stall Time. This point can be modified later after observation
and motor monitoring. The initial calculation for %TC is given in Equation 84-5.
%
𝐶𝐶𝐶𝐶
= 100%
�
1
−
𝐻𝐻𝐿𝐿𝑅𝑅
𝑆𝑆𝐿𝐿𝑆𝑆𝑠𝑠
𝑆𝑆𝑅𝑅𝐿𝐿𝐹𝐹𝐹𝐹
𝐶𝐶𝑅𝑅𝐴𝐴𝑠𝑠
𝐶𝐶𝐿𝐿𝐹𝐹𝐿𝐿
𝑆𝑆𝐿𝐿𝑆𝑆𝑠𝑠
𝑆𝑆𝑅𝑅𝐿𝐿𝐹𝐹𝐹𝐹
𝐶𝐶𝑅𝑅𝐴𝐴𝑠𝑠
�
= 100%
�
1
−
9
10
�
= 10 %
𝐶𝐶𝐶𝐶
Equation 84-5. Center Point Thermal Capacity
Set the Center RTD Bias Temperature (point 2) to 128
°
C and 10 percent thermal capacity per the results
from Equation 84-4 and Equation 84-5.
The Maximum RTD Bias Temperature (point 3) is set to 155
°
C and 100 percent thermal capacity. These
values are determined by the maximum insulation factor of F according to the motor manufacturer data.
Resistance Temperature Detector (49RTD)
The RTDs can be used as a direct source for protection as well. The maximum stator winding insulation
temperature is 155
°
C per the motor manufacturer data.
Set the 49RTD-1 protection element as shown in Figure 84-13 to protect the stator winding insulation.
Voting is set to 2, meaning at least 2 RTDs must be at 155
°
C or higher to result in a trip. A delay is not
required for the reason that temperatures change slowly because of the large motor thermal mass.
Summary of Contents for BE1-11m
Page 8: ...vi 9424200996 Revision History BE1 11m...
Page 12: ...x 9424200996 Contents BE1 11m...
Page 21: ...9424200996 1 9 BE1 11m Introduction Figure 1 1 Style Chart...
Page 22: ...1 10 9424200996 Introduction BE1 11m...
Page 40: ...3 6 9424200996 Controls and Indicators BE1 11m Figure 3 3 Front Panel Display Setup Screen...
Page 54: ...5 6 9424200996 Phase Undervoltage 27P Protection BE1 11m...
Page 56: ...6 2 9424200996 Negative Sequence Voltage 47 Protection BE1 11m...
Page 61: ...9424200996 7 5 BE1 11m Phase Overvoltage 59P Protection Figure 7 3 Overvoltage Settings Screen...
Page 62: ...7 6 9424200996 Phase Overvoltage 59P Protection BE1 11m...
Page 68: ...8 6 9424200996 Auxiliary Overvoltage 59X Protection BE1 11m...
Page 80: ...12 4 9424200996 Instantaneous Overcurrent 50 Protection BE1 11m...
Page 84: ...13 4 9424200996 Breaker Failure 50BF Protection BE1 11m...
Page 92: ...14 8 9424200996 Inverse Overcurrent 51 Protection BE1 11m...
Page 105: ...9424200996 18 3 BE1 11m Power Factor 55 Protection Figure 18 2 Power Factor Settings Screen...
Page 106: ...18 4 9424200996 Power Factor 55 Protection BE1 11m...
Page 110: ...19 4 9424200996 Resistance Temperature Detector 49RTD Protection BE1 11m...
Page 118: ...20 8 9424200996 Thermal Curve 49TC Protection BE1 11m...
Page 122: ...22 2 9424200996 Starts per Time Interval 66 Protection BE1 11m...
Page 124: ...23 2 9424200996 Restart Inhibit Protection BE1 11m...
Page 140: ...28 4 9424200996 Breaker Control Switch 101 BE1 11m...
Page 148: ...29 8 9424200996 Setting Groups BE1 11m...
Page 156: ...30 8 9424200996 Metering BE1 11m Figure 30 11 RTD Meter Screen...
Page 158: ...31 2 9424200996 Digital Points BE1 11m Figure 31 2 Digital Points Monitor Screen...
Page 177: ...9424200996 34 5 BE1 11m Motor Reporting Figure 34 9 Learned Motor Data Screen...
Page 178: ...34 6 9424200996 Motor Reporting BE1 11m...
Page 184: ...35 6 9424200996 Alarms BE1 11m...
Page 186: ...36 2 9424200996 Differential Reporting BE1 11m...
Page 196: ...38 4 9424200996 Demands BE1 11m...
Page 198: ...39 2 9424200996 Load Profile BE1 11m...
Page 208: ...41 6 9424200996 Trip Circuit Monitor 52TCM BE1 11m...
Page 212: ...42 4 9424200996 Fuse Loss 60FL BE1 11m...
Page 218: ...43 6 9424200996 BESTnet Plus BE1 11m Figure 43 8 Power Quality Page...
Page 221: ...9424200996 44 3 BE1 11m Mounting Figure 44 3 Case Side Dimensions...
Page 235: ...9424200996 45 5 BE1 11m Terminals and Connectors Figure 45 7 Example of Reversed CT Polarity...
Page 236: ...45 6 9424200996 Terminals and Connectors BE1 11m...
Page 269: ...9424200996 48 15 BE1 11m BESTlogic Plus Figure 48 4 Logic Page 1 for Default Logic...
Page 288: ...49 10 9424200996 Communication BE1 11m Figure 49 14 Modbus Mapping Screen...
Page 306: ...52 4 9424200996 Device Information BE1 11m...
Page 314: ...53 8 9424200996 Configuration BE1 11m Figure 53 3 Display Units Screen...
Page 318: ...54 4 9424200996 Introduction to Testing BE1 11m...
Page 330: ...56 6 9424200996 Commissioning Testing BE1 11m...
Page 336: ...58 4 9424200996 Phase Undervoltage 27P Test BE1 11m...
Page 340: ...59 4 9424200996 Phase Overvoltage 59P Test BE1 11m...
Page 352: ...60 12 9424200996 Auxiliary Overvoltage 59X Test BE1 11m...
Page 360: ...61 8 9424200996 Frequency 81 Test BE1 11m...
Page 364: ...62 4 9424200996 Instantaneous Undercurrent 37 Test BE1 11m...
Page 376: ...63 12 9424200996 Instantaneous Overcurrent 50 Test BE1 11m...
Page 396: ...65 16 9424200996 Inverse Overcurrent 51 Test BE1 11m...
Page 408: ...67 6 9424200996 Power 32 Test BE1 11m...
Page 412: ...68 4 9424200996 Loss of Excitation Reverse Var Based 40Q Test BE1 11m...
Page 426: ...70 10 9424200996 Thermal Curve 49TC Test BE1 11m...
Page 432: ...72 4 9424200996 Starts per Time Interval 66 Test BE1 11m...
Page 436: ...73 4 9424200996 Restart Inhibit Test BE1 11m...
Page 440: ...74 4 9424200996 Virtual Control Switches 43 Test BE1 11m...
Page 450: ...75 10 9424200996 Logic Timers 62 Test BE1 11m...
Page 464: ...79 8 9424200996 Troubleshooting BE1 11m...
Page 480: ...80 16 9424200996 Specifications BE1 11m...
Page 600: ...84 56 9424200996 Settings Calculation Examples BE1 11m Figure 84 70 Logic Page 4 Part 1...
Page 602: ...84 58 9424200996 Settings Calculation Examples BE1 11m...
Page 608: ...85 6 9424200996 BESTCOMSPlus Settings Loader Tool BE1 11m...
Page 609: ......