SEL-701-1 Monitor
Date Code 20011009
List of Figures
xii
Figure B.14 Power Factor Elements Logic. ...................................................B.40
Figure B.15 Overvoltage Element Logic. ......................................................B.41
Figure B.16 Over-/Underfrequency Element Logic. .....................................B.43
Figure B.17 Load-Jam Elements Logic. ........................................................B.44
Figure B.18 Load-Loss Logic; No Voltage Option. ......................................B.44
Figure B.19 Load-Loss Logic; Voltage Option Included. .............................B.45
Figure B.20 Reactive Power Elements Logic. ...............................................B.46
Figure B.21 Speed Switch Tripping Logic. ...................................................B.46
Appendix D: SEL-2020/SEL-2030 Compatibility Features
Appendix E: Motor Thermal Element
Motor Thermal Limit Characteristic
Plotted With Motor Starting Current. ..................................... E.4
Electrical Analog of a Thermal System. ...................................... E.5
Typical Induction Motor Current,
Torque, and Rotor Resistance versus Slip. ............................. E.6
Motor Starting Thermal Element. ................................................ E.8
With Resistance and Trip Level Undefined.
Calculating the Normal Operating
Energy Using Locked Rotor Trip Times. ............................... E.9
Motor Running Thermal Element. ............................................. E.10
Содержание SEL-701-1
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