Page ii
MPS Motor Protection System Rev. 6-F-022117
. Table of Contents
TABLE OF CONTENTS
SECTION PAGE
List of Figures ....................................................................... iv
List of Tables ........................................................................ iv
Disclaimer .............................................................................. v
1 Introduction .......................................................... 1-1
1.1 General .................................................................... 1-1
1.2 MPS Features .......................................................... 1-1
1.2.1 Protection .................................................... 1-1
1.2.2 Control – Starting Methods ........................ 1-1
1.2.3 Metering ...................................................... 1-1
1.2.4 Data Logging .............................................. 1-1
1.2.5 Inputs and Outputs ...................................... 1-1
1.2.6 MPS-OPI Operator Interface ..................... 1-2
1.2.7 MPS-RTD Module ..................................... 1-2
1.2.8 MPS-DIF Differential Module ................... 1-2
1.2.9 Communications Interface ......................... 1-2
1.3 Ordering Information .............................................. 1-2
2 Installation ............................................................. 2-1
2.1 General .................................................................... 2-1
2.2 MPS-CTU Control Unit ......................................... 2-1
2.3 MPS-OPI Operator Interface .................................. 2-1
2.4 MPS-RTD Module ................................................. 2-1
2.5 MPS-DIF Differential Module ............................... 2-1
2.6 Earth-Fault CT’s ..................................................... 2-1
3 System Wiring ....................................................... 3-1
3.1 General .................................................................... 3-1
3.2 Wiring Connections ................................................ 3-1
3.2.1 MPS-CTU Connections ............................. 3-1
3.2.1.1 Supply Voltage .............................. 3-1
3.2.1.2 Current Inputs ................................ 3-1
3.2.1.3 Voltage Inputs ............................... 3-1
3.2.1.3.1 Direct Connection ........ 3-3
3.2.1.3.2 1-PT Connection .......... 3-3
3.2.1.3.3 2-PT Connection .......... 3-3
3.2.1.3.4 3-PT Connection .......... 3-3
3.2.1.4 Digital Inputs ................................. 3-3
3.2.1.4.1 DC Operation ............... 3-4
3.2.1.4.2 AC Operation ............... 3-4
3.2.1.4.3 Combined AC and
DC Operation ............................... 3-4
3.2.1.4.4 Tachometer
Input (HSI) ................................... 3-4
3.2.1.5 Analog Input (AN IN) ................... 3-4
3.2.1.6 Analog Output (AN OUT) ............ 3-4
3.2.1.7 PTC Input ...................................... 3-4
3.2.1.8 IRIG-B Input ................................. 3-4
3.2.1.9 I/O Module Communication ......... 3-4
3.2.1.10 RS-485 Network
Communications ......................................... 3-4
3.2.2 MPS-OPI Connections and
Address Selection ....................................... 3-4
3.2.3 MPS-RTD Connections and
Address Selection ....................................... 3-5
3.2.4 MPS-DIF Connections ............................... 3-5
3.2.4.1 Core Balance ................................. 3-5
TABLE OF CONTENTS
SECTION PAGE
3.2.4.2 MPS Summation ............................ 3-5
3.2.4.3 DIF Summation ............................. 3-5
3.2.5 Dielectric-Strength Testing ........................ 3-5
4 Operation and Setup ............................................ 4-1
4.1 General .................................................................... 4-1
4.2 MPS-CTU ............................................................... 4-1
4.2.1 LED Indication ........................................... 4-1
4.2.2 Reset Switch ................................................ 4-1
4.2.3 Phase-CT Inputs .......................................... 4-1
4.2.4 Earth-Fault-CT Input .................................. 4-2
4.2.5 Voltage Inputs ............................................. 4-2
4.2.6 Motor Data .................................................. 4-2
4.2.7 Output Relay Assignment .......................... 4-2
4.2.8 Digital Inputs 1 to 7 .................................... 4-3
4.2.9 Tachometer Input (HSI) ............................. 4-4
4.2.10 Analog Output ............................................. 4-4
4.2.11 Analog Input ............................................... 4-5
4.2.11.1 Metering only .............................. 4-5
4.2.11.2 Protection ..................................... 4-5
4.2.11.3 Synchronize to ASD .................... 4-5
4.2.11.4 Motor Speed ................................ 4-5
4.2.12 Starter .......................................................... 4-5
4.2.13 Protection .................................................... 4-5
4.2.14 Miscellaneous Configuration ..................... 4-5
4.2.15 Network Communications .......................... 4-5
4.3 MPS-OPI ................................................................. 4-5
4.3.1 General ........................................................ 4-5
4.3.2 Configuring the MPS-CTU for
OPI Operation ............................................. 4-5
4.3.3 Starter Control ............................................. 4-6
4.3.3.1 OPI Control .................................... 4-6
4.3.3.2 Local Control ................................. 4-6
4.3.3.3 Remote Control ............................. 4-6
4.3.4 Metering ...................................................... 4-7
4.3.5 Messages ..................................................... 4-7
4.3.5.1 Trip Reset ....................................... 4-7
4.3.5.2 Status .............................................. 4-7
4.3.5.3 Data Logging ................................. 4-9
4.3.5.4 Statistical Data ............................... 4-9
4.3.5.5 Emergency Thermal Reset ............ 4-9
4.3.6 Password Entry and Programming ............. 4-9
4.4 MPS-RTD ............................................................. 4-10
4.5 MPS-DIF ............................................................... 4-10
4.6 Waveform Capture ............................................... 4-10
5 Protective Functions ......................................... 5-1
5.1 General ............................................................... 5-1
5.2 Overload ............................................................. 5-1
5.2.1 Thermal Model ....................................... 5-1
5.2.2 Locked-Rotor Times ............................... 5-4
5.2.3 Emergency Thermal Reset ...................... 5-4
5.3 Overcurrent ........................................................ 5-4
5.4 Auxiliary Overcurrent ........................................ 5-5
5.5 Reduced Overcurrent ......................................... 5-5
5.6 Jam ..................................................................... 5-5
5.7 Earth Fault .......................................................... 5-5
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