Littelfuse MP8000 Series User manual

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E-mail: [email protected]
www.littelfuse.com/mp8000
MP8000
MOTOR PROTECTION RELAY
Instruction Manual
REVISION 0-A-030818
Copyright © 2018 Littelfuse. All rights reserved.

Page A
REV. 0-A-030818
MP8000 Motor Protection Relay
All brand or product names appearing in this document are the trademark or registered
trademark of their respective holders. No Littelfuse trademarks may be used without written
permission. Littelfuse products appearing in this document may be covered by U.S. and
Foreign patents.
Littelfuse, Inc. reserves all rights and benefits afforded under federal and international
copyright and patent laws in its products, including without limitation software, firmware, and
documentation.
The information in this document is provided for informational use only and is subject to
change without notice. Littelfuse, Inc. has approved only the English language document.
This product is covered by the standard Littelfuse 5-year warranty. For warranty details, visit
www.littelfuse.com or contact your customer service representative.

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MP8000 Motor Protection Relay
TABLE OF CONTENTS
SECTION PAGE
1 Preface .......................................................................................3
1.1 Manual Overview.................................................................3
1.2 Safety Information ...............................................................3
1.2.1 Dangers, Warnings, and Cautions...........................3
1.2.2 Safety Symbols........................................................3
1.2.3 Warnings, Cautions, and Notes ..............................4
1.2.4 Compliance Approvals.............................................4
1.3 General Information .............................................................4
1.3.1 Typographic Conventions.........................................4
1.3.2 Examples..................................................................4
1.3.3 Product Labels .........................................................4
1.3.4 Instructions for Cleaning and Decontamination......4
2 Introduction and Specifications ...........................................5
2.1 Overview ..............................................................................5
2.2 Features................................................................................5
2.2.1 Standard Protection Features..................................5
2.2.2 Monitoring Features ................................................5
2.2.3 Communications and Control ..................................5
2.2.4 Connectivity .............................................................5
2.2.5 Security....................................................................5
2.2.6 Power Supply...........................................................5
2.3 Models, Options, and Accessories ......................................5
2.3.1 Models.....................................................................5
2.3.2 Accessories..............................................................5
2.4 Applications .........................................................................6
2.5 Getting Started.....................................................................7
2.5.1 Powering the Relay..................................................7
2.5.2 Establishing Communication ...................................7
2.6 Specifications.......................................................................7
2.6.1 Compliance ..............................................................7
2.6.2 General ....................................................................7
2.6.3 Type Tests ................................................................8
2.6.4 Current Transformers (CTs) ......................................9
2.6.5 Relay Elements ........................................................9
2.6.6 Metering ................................................................11
3 Installation..............................................................................12
3.1 Overview ............................................................................12
3.2 Phone Application ..............................................................12
3.3 Relay Placement.................................................................12
3.3.1 Physical Location ...................................................12
3.4 Relay Features and Connections........................................12
3.4.1 Relay Mounted on DIN Rail...................................13
3.4.2 Relay Mounted on Solid Surface or Panel ............14
3.5 Relay Connections..............................................................14
3.5.1 Terminal Block Connections ..................................14
3.5.2 Wire Sizes..............................................................14
3.5.3 Voltage Connections (L1, L2, L3)............................14
3.5.4 Power Supply Connections (A1, A2)......................15
3.5.5 Relay Contacts (1 Form C and 1 Form A)
Connections ...........................................................15
SECTION PAGE
3.5.6 Current Connections .............................................15
3.5.7 Power Supply Connections (A1, A2)......................15
3.5.8 Inputs, PTC, ZSCT Connections .............................15
3.5.9 Input Connections (I.1)...........................................15
3.5.10 PTC Connections (T1, T2).......................................16
3.5.11 Zero-Sequence Current Transformer (ZSCT)
(Z1, Z2) (for Ground Fault detection)......................16
3.5.12 Connecting to a PC ................................................16
3.5.13 Connecting to the Littelfuse MP8000 App ............16
3.6 AC/DC Control Connection Diagrams ................................16
3.6.1 Three-Phase Motor under 100 FLA with
optional ZSCT and PTC connected ........................16
3.6.2 Three-Phase Motor over 100 FLA..........................17
3.6.3 Single-Phase Applications.....................................18
4 Littelfuse MP8000 Smartphone and Tablet App...............19
4.1 Overview ............................................................................19
4.2 Installing the Android App .................................................19
4.3 Installing the iPhone App...................................................19
4.4 Running the Littelfuse MP8000 App..................................19
4.5 Advertising Page ................................................................19
4.6 Configuration Pages ...........................................................20
4.7 Configuration Basic Page (Protective Features).................21
4.7.1 Low Voltage (LV) ....................................................21
4.7.2 High Voltage (HV)...................................................22
4.7.3 Voltage Unbalance (VUB).......................................22
4.7.4 Overcurrent (OC) ....................................................22
4.7.5 Undercurrent (UC) ..................................................22
4.7.6 Current Unbalance (CUB).......................................22
4.7.7 Trip Class (TC) ........................................................22
4.7.8 Restart Delay Zero (RD0) .......................................22
4.7.9 Restart Delay One (RD1)........................................23
4.7.10 Restart Delay Two (RD2)........................................23
4.7.11 Restart Delay Three (RD3) .....................................23
4.7.12 Undercurrent Restart Attempts (RU) .....................23
4.7.13 Other Faults Restart Attempts (RF)........................23
4.7.14 Basic Settings Default Values...............................23
4.8 Configuration Advanced Page (Protective Features)..........23
4.8.1 Current Transformer Ratio (CT)..............................23
4.8.2 Potential Transformer Ratio (PT)............................24
4.8.3 Undercurrent Trip Delay (UCTD) ............................24
4.8.4 Linear OC Trip Delay (LINTD) .................................24
4.8.5 Ground Fault Trip Current (GFTC)...........................24
4.8.6 Ground Fault Trip Delay (GFTD) .............................24
4.8.7 Low Power Trip Limit (LKW) ..................................24
4.8.8 High Power Trip Limit (HKW).................................24
4.8.9 High Power Trip Delay (HPTD) ...............................25
4.8.10 Stall Percentage (STLP) .........................................25
4.8.11 Stall Trip Delay (STTD)...........................................25
4.8.12 Stall Inhibit Delay (STID) .......................................25
4.8.13 Advanced Settings Default Values........................25

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SECTION PAGE
4.8.14 Hardware Configuration Fields
Single-Phase Motor (SPM) ....................................25
4.8.15 Communication Settings........................................26
4.8.16 RTD Module...........................................................26
4.8.17 Change Device Name ............................................26
4.8.18 Change Password ..................................................26
4.8.19 Reset Password .....................................................26
4.9 Real-Time Page (Measurements & Monitoring)................26
4.9.1 Device ID................................................................26
4.9.2 Reset Relay............................................................26
4.9.3 System Status........................................................26
4.9.4 Active Timer...........................................................26
4.9.5 Line-to-Line Voltage...............................................27
4.9.6 Voltage Unbalance.................................................27
SECTION PAGE
4.9.7 Line Current ...........................................................27
4.9.8 Current Unbalance.................................................27
4.9.9 Power.....................................................................27
4.9.10 Power Factor..........................................................27
4.9.11 Run-Time................................................................27
4.9.12 Start Count.............................................................27
4.9.13 Thermal Capacity...................................................27
4.9.14 Fault Page ..............................................................27
4.10 Time Settings ...................................................................28
4.11 Real-Time Page (Measurements & Monitoring)..............28
4.11.1 DHCP Assigned IPv4 Address................................28
4.11.2 Point to Point IP Address Assignment (no
DHCP).....................................................................28
4.11.3 Setting a Static IP Address....................................28
5 PC Interface............................................................................31
6 Troubleshooting .....................................................................32
6.1 Overview ............................................................................32
7 Ground Fault Testing Procedure .........................................33

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1. PREFACE
1.1 Manual Overview
The MP8000 Motor Management Relay Instruction
Manual describes common aspects of motor relay
application and use. It includes the necessary
information to install, set, test, and operate the relay.
An overview of each manual section and topics follows:
1. PREFACE
Describes the manual organization and conventions
used to present information.
2. INTRODUCTION AND SPECIFICATIONS
Describes the basic features and functions of the
MP8000; lists the relay specifications.
3. INSTALLATION
Describes how to mount and wire the MP8000;
illustrates wiring connections for various applications.
4. SMARTPHONE/TABLET APPLICATION
Describes the features, installation methods, and
types of help available with the Littelfuse MP8000
App, including setting the relay, meter and monitoring,
control, and fault retrieving.
5. PC INTERFACE
Describes the features, installation methods, and
types of help available with the Littelfuse MP8000
Software, including setting the relay, meter and
monitoring, control, and events retrieving.
6. TROUBLESHOOTING
Describes common causes for various trip/fault
conditions.
7. GROUND FAULT TESTING
1.2 Safety Information
1.2.1 Dangers, Warnings, and Cautions
This manual uses three kinds of hazard statements,
defined as follows:
DANGER
WARNING
CAUTION NOTE:
Refer to accompanying documents.
Earth (ground)
Protective earth (ground)
Direct current
Alternating current
Both direct and alternating current
Instruction manual
CAUTION
Indicates an imminently hazardous situation that, if not
avoided, will result in death or serious injury.
DANGER
WARNING
CAUTION NOTE:
Refer to accompanying documents.
Earth (ground)
Protective earth (ground)
Direct current
Alternating current
Both direct and alternating current
Instruction manual
CAUTION
Indicates a potentially hazardous situation that, if not
avoided, could result in death or serious injury.
DANGER
WARNING
CAUTION NOTE:
Refer to accompanying documents.
Earth (ground)
Protective earth (ground)
Direct current
Alternating current
Both direct and alternating current
Instruction manual
CAUTION
Indicates a potentially hazardous situation that, if not
avoided, may result in minor or moderate injury or
equipment damage.
1.2.2 Safety Symbols
The following symbols are often marked on Littelfuse
products.
DANGER
WARNING
CAUTION NOTE:
Refer to accompanying documents.
Earth (ground)
Protective earth (ground)
Direct current
Alternating current
Both direct and alternating current
Instruction manual
CAUTION

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MP8000 Motor Protection Relay
1.2.3 Warnings, Cautions, and Notes
DANGER
WARNING
CAUTION NOTE:
Refer to accompanying documents.
Earth (ground)
Protective earth (ground)
Direct current
Alternating current
Both direct and alternating current
Instruction manual
CAUTION
Use of this equipment in a manner other than specified
in this manual can impair operator safety safeguards
provided by this equipment.
DANGER
WARNING
CAUTION NOTE:
Refer to accompanying documents.
Earth (ground)
Protective earth (ground)
Direct current
Alternating current
Both direct and alternating current
Instruction manual
CAUTION
Installation should be done by qualified personnel
following all national, state and local electrical codes.
Have only qualified personnel service this equipment.
If you are not qualified to service this equipment, you
can injure yourself or others, or cause equipment damage.
DANGER
WARNING
CAUTION NOTE:
Refer to accompanying documents.
Earth (ground)
Protective earth (ground)
Direct current
Alternating current
Both direct and alternating current
Instruction manual
CAUTION
Equipment components are sensitive to electrostatic
discharge (ESD). Undetectable permanent damage
can result if you do not use proper ESD procedures.
Ground yourself, your work surface, and this equipment
before installing this equipment. If your facility is not
equipped to work with these components, contact
Littelfuse about returning this device and related
Littelfuse equipment for service.
NOTE: This device is shipped with default passwords.
Default passwords should be changed to private
passwords at installation. Failure to change each
default password to a private password may allow
unauthorized access. Littelfuse shall not be responsible
for any damage resulting from unauthorized access.
1.2.4 Compliance Approvals
1.3 General Information
1.3.1 Typographic Conventions
You can communicate with the MP8000 in three ways.
• Use the Littelfuse MP8000 app, iPhone/iPad
or Android. The MP8000 uses Bluetooth 4.0
(Bluetooth Low Energy - BLE). The smartphone or
tablet must have BLE to connect to the MP8000.
• Use the Ethernet port connected to a PC (via
network) with Littelfuse MP8000 Software installed.
• Use the Ethernet port connected to a network
and create a Modbus TCP or Ethernet/IP program
using the MP8000 memory map.
1.3.2 Examples
This instruction manual uses several example
illustrations and instructions to explain how to
effectively operate the MP8000. These examples
are for demonstration purposes only; the firmware
identification information or settings values included
in these examples may not necessarily match those in
the current version of your MP8000.
1.3.3 Product Labels
The MP8000 label is shown below. The label is located
on the right side panel of the product.
Product Compliance Label for the MP8000
MP8000
Control Power Input: 90-265VAC
Advanced Motor Protection Overload Relay
Voltage Input (L-to-L): 90-690VAC 50/60Hz 1Ø/3Ø
Input Current: 0.5-100A Direct; 100-1000A*
Contact Rating: 5A @ 240VAC, B300
Pair Code Password: 966352
Setpoint Default Password: admin
MAC Address: 00:21:6F:00:41:F5
*With External CT’s Date Code: 2018/06
Contains FCC ID: TFB-1002
Contains IC: 5969A-1002
Patent Pending
IND. CONT. EQ.
LISTED
®
1.3.4 Instructions for Cleaning and
Decontamination
Use a mild soap or detergent solution and a damp
cloth to carefully clean the MP8000 chassis when
necessary. Avoid using abrasive materials, polishing
compounds, and harsh chemical solvents (such as
xylene or acetone) on any surface of the relay.

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MP8000 Motor Protection Relay
2.1 Overview
The MP8000 Motor Protection Relay is designed
to protect three-phase or single-phase motors. The
basic relay provides locked rotor, overload, over-
temperature, and unbalance protection. Voltage-based
protection elements are standard. Additionally, the
relay includes inverse time-over current elements
suitable for overload protection. All relay models
provide monitoring functions.
The relay operates as a fail-safe device. This means
when the voltage is within the programmed limits,
the relay will energize—the NO contact will close.
When the unit loses power or senses a fault condition,
the relay will de-energize and contacts will return to
their original state. Once the unit has been installed
and programmed, the unit is ready to operate. Once
acceptable voltage is applied and the RD0 timer
expires, the relay will energize—the NO contact
will close.
This manual contains the information needed to install,
set, test, operate, and maintain any MP8000.You need
not review the entire manual to perform specific tasks.
2.2 Features
2.2.1 Standard Protection Features
• Overload (Overpower) (49)
• Underload (Underpower) (37P)
• Undercurrent (Load Loss) (37)
• Current Unbalance/Phase Loss (46)
• Overcurrent (Load Jam) (51)
• Ground Fault—Zero-Sequence (50Ns)
• Manual Motor Reset input
• Phase Time-Overcurrent (51)
• Phase Reversal (47), voltage based
• Voltage Unbalance (47)
• Motor Starting/Running
• Start Motor Run-Timer
• Thermal Capacity Utilization (TCU)
• Contactor Failure Protection
• Positive Temperature Coefficient (PTC) Over-
Temperature Switching Thermistor (49)
• Undervoltage (27)
• Overvoltage (59)
• Power Elements (32)
2.2.2 Monitoring Features
• Event Summaries that contain relay ID, date and
time, trip cause, and current/voltage magnitudes
• Sequential Multiple Events Recorder (SER)
• Power Factor
• Running times
• Number of starts
• A complete suite of accurate metering functions
• Thermal Capacity Used
2.2.3 Communications and Control
• Ethernet Modbus TCP, Ethernet FTP, Ethernet/IP
• Bluetooth 4.0 (Bluetooth Low Energy - BLE)
2.2.4 Connectivity
• Voltage: direct connection (as high as 690 VAC,
line-to-line); three-wire delta, open-delta or single-
phase connected Potential Transformers
• Current: Built-in pass-through current transformers
for 0.5-100A phase current measurements
• External current transformer inputs for >100A
phase current measurements
• Zero-Sequence Ground Fault CT input
• Positive Temperature Coefficient Input (PTC)
• Digital Outputs: one Form-A output contacts, one
Form-C output contact
• Digital Inputs: Externally wetted to 110/240 VAC
2.2.5 Security
• Pairing and Setpoint change pass codes on side
labels, unique to each MP8000
2.2.6 Power Supply
• Wide input range 85-264VAC
2.3 Models, Options, and Accessories
2.3.1 Models
Complete ordering information is not provided in this
instruction manual. See the latest MP8000 Model
Option Table at www.littelfuse.com.
2.3.2 Accessories
Contact your Technical Service Center or the Littelfuse
factory for additional detail and ordering information
for the following accessories/options:
• Zero-Sequence CTs
2. INTRODUCTION AND SPECIFICATIONS

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2.4 Applications
Section 3: Installation includes connection diagrams
for various applications. The following is a list of
possible application scenarios:
• With or without external current and/or
voltage transformer
• Full voltage non-reversing (FVNR) starter
(across the line)
• Forward/reverse starter – Accomplished by
placing the MP8000 “above” the forward and
reverse contactors.
Figure 2.1 shows across-the-line starting AC
connections with optional ZSCT and PTC. Refer to
Section 3: Installation for additional applications and
the related connection diagrams.
NO
(15)
C
(13)
.
I.2 I.1
MP8000
PTC
(OPTIONAL)
RESET
FROM A2
PE
C
(95)
L1 L3L2 A2/L
Z1 Z2 T1 T2
PHASE A
PHASE B
PHASE C
AUX VOLTAGE
SUPPLY
ZERO-SEQUENCE
CURRENT
TRANSFORMER
(OPTIONAL)
ABC
NO
(96)
NC
(14)
C
PILOT
STARTC
STOP
AUTO
HAND
OFF
FROM A1
M
A1/N
85 – 264 VAC
90 - 690 VAC
0.5 - 100A (100A+ using external CTs)
Figure 2.1 AC Connections - Across-the-Line Starting

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2.5 Getting Started
Understanding basic relay operation principles and
methods will help you use the MP8000 effectively.
This section presents the fundamental knowledge
you need to operate the MP8000, organized by task.
These tasks help you become familiar with the relay
and include the following:
• Powering the relay
• Establishing communication
• Inputting configuration settings
• Checking relay status
Perform thesetasks to gain a fundamental understanding
of relay operation.
2.5.1 Powering the Relay
Power the MP8000 with 85-264 VAC.
• Connect the earth ground lead; see figure 2.1 for
Power Supply Connections.
• Once connected to power, the relay does an
internal self-check , flashing all LEDs. After the
self-check, either the green STATUS LED, or the
red ERROR LED will be illuminated. If the green
STATUS LED is on, the relay status is “ok”, and
the control relay will be closed. If any condition
is present that will not allow the control relay to
close, or the relay is tripped (and/or restarting), the
red ERROR LED will be illuminated and the green
STATUS LED will be off.
2.5.2 Establishing Communication
The standard MP8000 has a Bluetooth Low Energy
(BLE) interface via Littelfuse MP8000 app and an
Ethernet port via Littelfuse MP8000 Software. When
the MP8000 has successfully connected to a Bluetooth
Low Energy enabled device running the MP8000 app,
the blue LED is illuminated.
See Section 4: Littelfuse MP8000 Smartphone and
Tablet App for more information on app installation and
operation.
See Section 5: PC Interface for more information on
MP8000 Software installation and operation.
2.6 Specifications
NOTE: Motors/loads with FLA > 100 amps must use external CTs. You
must use CTs that have a rated secondary current of 5 amps (examples
50:5, 100:5, 200:5, etc.).
2.6.1 Compliance
CE Mark: EMC Directive Low-Voltage
Directive
IEC: IEC 60947-1 Edition 5.2 (UL 60947),
IEC 60947-8-1, EC 60947-4-1
UL, cUL: UL-1053, C.22.2 No. 14
RCM: AS/NZS 4417.1
AS/NZS 4417.2
2.6.2 General
AC Current Inputs—Phase
Full Load Amperage (FLA): 0.5–100.0 A
(> 100 A with external CTs)
Rated Frequency: 50/60 Hz
Burden (Per Phase): 0.0025 VA @ 30 A
Zero-Sequence CT Current (IN)
Zero-Sequence CT Ratio: 100:1
Input Rated Current Range: 0.010–50.0 mA
Input Rated Continuous
Thermal Current: 150 mA
One Second Thermal
Current: 1.5 A
Saturation Current: 5-50 mA
Burden: 0.09 VA at 50 mA
AC Voltage Inputs (Line-to-Line)
Rated Operating
Voltage (Ue): 90–690 VAC
Rated Continuous Voltage: 800 VAC
Rated Frequency: 45/65 Hz
Burden: < 0.72 VA @ 690 VAC
Power Supply
Rated Supply Voltage: 85-264 VAC
Power Consumption: < 5 W
Interruptions: 20 ms minimum
Output Contacts
General
Mechanical Durability: 100,000 no load operations
Pickup/Dropout Time: < 10 ms
(coil energization to contact closure)
AC Output Ratings for relays;
CONTROL (Form A),
ALARM (Form C)
Contact Rating
Designation: B300
(B = 5 A, 300 = rated insulation voltage)
Maximum Operational
Voltage: 250 VAC
Maximum Operational
Current: 5 A
Rated Frequency: 50/60 ±5 Hz
Electrical Durability Make
VA Rating: 3600 VA
Electrical Durability Break
VA Rating: 360 VA

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MP8000 Motor Protection Relay
Optoisolated Control Inputs
(Externally Wetted to 110/240 VAC)
Maximum Current Draw: 5 mA @ 110 VAC, 10 mA @ 240 VAC
Rated Impulse Withstand
Voltage (Uimp): 4000 V
Pickup Time: < 200 ms
Dropout Time: > 1000 ms
Frequency and Phase Rotation
System Frequency: 50, 60 Hz
Phase Rotation: ABC, ACB
Frequency Tracking: 45–65 Hz
Time-Code
Format: Unix Time (UTC)
Accuracy (Clock Drift): 10 minutes per year, typically
Communications Ports
Ethernet Port: Single, 10/100BASE-T copper
(RJ45 connector)
Communications Protocols
Modbus TCP, FTP, Ethernet/IP
OperatingTemperature
Rated Operating Range: -40° to +70°C (-40° to +158°F)
Rated Storage Range: -40° to +85°C (-40° to +185°F)
Operating Environment
Pollution Degree: 3
Overvoltage Category: III (up to 300 VAC to earth)
II (up to 600 VAC to earth)
Atmospheric Pressure: 80–110 kPa
Relative Humidity: 5–95%, non-condensing
Maximum Altitude
Without Derating: 3000 m
(Consult Factory for Higher Altitude Derating)
Dimensions
Height: 74.4 mm (2.9 in.)
Width: 103.6 mm (4.1 in.)
Depth: 121.7 mm (4.8 in.)
Weight 0.4 kg (0.9 lbs)
Terminal Connections
Compression Plug
(Black, 5.08mm spacing)
Tightening Torque
Maximum: 0.62 Nm (5.5 in-lb)
Earth Ground Lug Tightening
Torque Maximum: 0.89 Nm (7.9 in-lb)
2.6.3 Type Tests
Dielectric Strength and Impulse Tests
Dielectric (HiPot): (See Table 2.1)
Dielectric Strength (Volts)
Measuring Input (L1, L2, L3) Power Supply (A1,A2) Relay-Alarm (C (13), NO (15), NC (14)) Relay-Control (C (95), NO (96)) ZSCT (Z1, Z2) PTC (T1, T2) Digital In (I.1) Ground Terminal RS485 CAN Bus Ethernet
Measuring Input (L1, L2, L3) X 2380 2380 2380 2380 2380 2380 2380 2380 2380 2380
Power Supply (A1, A2) 2380 X 1528 1528 1528 1528 X 1528 1528 1528 1528
Relay-Alarm (C (13), NO (15), NC (14)) 2380 1528 X 1528 1528 1528 1528 1528 1528 1528 1528
Relay-Control (C (95), NO (96)) 2380 1528 1528 X 1528 1528 1528 1528 1528 1528 1528
ZSCT (Z1, Z2) 2380 1528 1528 1528 X 1528 1528 X 1528 1528 1528
PTC (T1, T2) 2380 1528 1528 1528 1528 X 1528 1528 1528 1528 1528
Digital In (I.1) 2380 X 1528 1528 1528 1528 X 1528 1528 1528 1528
Ground Terminal 2380 1528 1528 1528 X 1528 1528 X 1528 1528 1528
RS485 2380 1528 1528 1528 1528 1528 1528 1528 X 1528 1528
CAN Bus 2380 1528 1528 1528 1528 1528 1528 1528 1528 X 1528
Ethernet 2380 1528 1528 1528 1528 1528 1528 1528 1528 1528 X
Table 2.1 MP8000 Insulation Between Inputs And Outputs

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RFI and InterferenceTests
Electrostatic Discharge (ESD): IEC 61000-4-2, Level 3, 6kV contact,
8kV air
Radio Frequency Immunity
(RFI), Conducted : IEC 61000-4-6, Level 3 10V/m
Radio Frequency Immunity
(RFI), Radiated: IEC 61000-4-3, Level 3 10V/m
Fast Transient Burst: IEC 61000-4-4, Level 3,
3.5kV input power
Surge: IEC 61000-4-5, Level 3, 2kV line-to-
line; Level 4, 4kV line-to-ground
FCC Rating: Part 15.107 for emissions, Part
15.247 for intentional radiators
Fault Events Recorder
Number of faults stored: 1,000 (most recent faults)
Time-Stamp Resolution: 1 second
Time-Stamp Accuracy
(With Respect to
Time Source): ±1 second
2.6.4 Internal Current Transformers (CTs)
Our Full-Load Current
(FLA) Limits: 0.5–100.0 A
2.6.5
NOTE: Motors/loads with FLA > 100 amps must use external CTs. You
must use CTs that have a rated secondary current of 5 amps (examples
50:5, 100:5, 200:5, etc.).
Relay Elements
See section Littelfuse MP8000 Smartphone and Tablet App >
Configuration Page for details on programming relay behavior.
The numbers in parenthesis in the following specifications are
ANSI device numbers.
Phase-to-Phase Under Voltage (27)
NOTE: Motors/loads operating at voltages higher than 690 VRMS must
use external PTs.
Parameter Name: Low Voltage (LV)
Enable/Disable: No disable available
Setting Range: 90 VRMS minimum
Accuracy: ±1% of setting ±2 VRMS
High Power (49)
Parameter Name: High Kilo-Watt (HKW)
Enable/Disable: Default is disabled
Setting Range: Not limited
Accuracy: ±5% of setting ±5 Watts
Under Power (37P)
Parameter Name: Low Kilo-Watts (LKW)
Enable/Disable: Default is disabled
Setting Range: Not limited
Accuracy: ±5% of setting ±5 Watts
Undercurrent (Load Loss) (37)
Parameter Name: Under Current (UC)
Enable/Disable: Default is enabled
Setting Range: Not limited; Suggest 0.75–0.95 • FLA
Accuracy: ±2% of setting ±0.01 ARMS
Pickup/Dropout Time: 1 second + programmable delays
Current Unbalance and Phase Loss (46)
Parameter Name: Current Unbalance (CUB)
Enable/Disable: Default is enabled
Setting Range: Not limited; Default 5; Suggest
5–45%
Accuracy: ±5% of setting
Maximum Pickup/
Dropout Time: See Table 2.2. Additional delays for
motor startup may apply
MEASURED VALUE OF CURRENT UNBALANCE TRIP TIME
CUB setting 30 seconds
CUB setting + 1% 15 seconds
CUB setting + 2% 10 seconds
CUB setting + 3% 8 seconds
CUB setting + 4% 6 seconds
CUB setting + 5% 5 seconds
CUB setting + 6% 4 seconds
CUB setting + 10% 3 seconds
CUB setting + 15% or more 2 seconds
Table 2.2 CUB Trip Time, CUTD=30
Example:
CUB setting = 5% If measured value of current
unbalance is 6% the MP8000 will
trip in 15 seconds
Voltage Unbalance (47)
Parameter Name: Voltage Unbalance (VUB)
Enable/Disable: Default is enabled
Setting Range: Not limited; Default 5%;
Suggest 2%-25%
Accuracy: ±1% of setting ±2 VRMS
Phase Reversal (47)
NOTE: This condition is detected prior to motor startup. After startup this
condition is not monitored.
Rotation Direction: Programmable; Default ABC

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Incomplete Sequence (Load Jam/Stall) (48)
Parameter Name: Stall Percentage Current (STLP)
Enable/Disable: Default is disabled
Setting Range: Not limited; Suggest is 400% of OC
Accuracy: ±2% of setting
Maximum Pickup/
Dropout Time: Programmable
(Stall Time Delay seconds)
PTC Over-Temperature (49)
Type of Control Unit: IEC 60947-8, mark A
Max. Number
of Thermistors: Must adhere to the limits below
Over Temp Trip Resistance: ≥ 1650 ± 80 ohms
Reset Range: ≥ 25 ohms and ≤ 1500 ohms
Short circuit Detection
Resistance: ≤ 20 ± 5 ohms
Maximum Cold Resistance: 1500 ohms
Ground Fault - Residual Method (Zero-Sequence)(50N)
Best protection is with a resistively grounded system
Parameter Name: Ground Fault Trip Current (GFTC)
Ground Fault Trip Delay (GFTD)
GFTC Setting Range: GFTC = 0 is OFF (disabled);
Default is disabled.
Suggested Range is 0.20–4.5 A
Accuracy: ±2% of setting ±0.01 ARMS
Time Delay: Class I operation 0.5 – 1.0 seconds
Class II operation 1.1 – 5.0 seconds
Values above 5 seconds are
non-standard
Timing Accuracy: ±250 ms
Overcurrent (51)
Parameter Name: Linear Overcurrent Trip Delay
(LINTD)
Enable/Disable: Default is disabled
Setting Range: Not limited; Default is 5 Seconds; 1
second minimum
Accuracy: ±2% of setting ±0.1 second
Figure 2.2 OvercurrentTrip Curves

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Inverse-Time Overcurrent (51)
Parameter Name: Trip Class (TC)
Enable/Disable: Default is enabled
Setting Range: Not limited; common values 5, 10,
15, 20, 30
Accuracy: See Figure 2.2; ±2% of setting
±0.1 second
Phase-to-Phase Overvoltage (59)
NOTE: Motors/loads operating at voltages higher than 690 VRMS must
use external PTs.
Parameter Name: High Voltage (HV)
Enable/Disable: No Disable available
Setting Range: Not limited
Accuracy: ±1% of setting ±2 V
Timers (See section 4.7 for details on RD0-RD3)
Setting Range: Various
Accuracy: ±0.5% of setting ±1 second
2.6.6 Metering
Accuracies are specified at 20°C, 50 or 60 Hz nominal frequency,
AC currents within 0.5 – 100 ARMS, and ac voltages within
90–690 VRMS unless otherwise noted.
Line-to-Line Voltages: ±1% of reading ±0.5 VRMS
Voltage Unbalance (%): ±1% of reading
Phase Currents: ±2% of reading ±0.05 ARMS
Current Unbalance (%): ±2% of reading
Real Power (kW): ±5% of reading for 0.10 < pf < 1.00
Power Factor: ±3% of reading
Thermal Capacity Used: ±5% of reading
THE FOLLOWING ITEMS ARE ONLY AVAILABLE
THROUGH NETWORK ACCESS OF THE MEMORY MAP:
System Frequency: ±0.1 Hz of reading for frequencies
within 45–65 Hz (V1 > 90 V)
IG (Ground Current): ±2% of reading ±0.001 ARMS

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3. INSTALLATION
3.1 Overview
The first steps in applying the MP8000 Motor
Protection Relay are installing and connecting the
relay. This section describes common installation
features and requirements. To install and connect the
relay safely and effectively, you must be familiar with
relay configuration features and options. You should
carefully plan relay placement, cable connections, and
relay communication.
This section contains drawings of typical AC and DC
connections to the MP8000. Use these drawings
as a starting point for planning your particular relay
application.
3.2 Smartphone/Tablet Application
The installation details for the Littelfuse MP8000 app
are presented in Section 4. There are two options:
• Android (supports versions 4.3 and higher)
• iOS (supports versions 9.0 and higher)
3.3 Relay Placement
Proper placement of the MP8000 helps to ensure
years of trouble-free motor management. Use the
following guidelines for proper physical installation of
the MP8000.
3.3.1 Physical Location
Mount the MP8000 in a sheltered indoor environment
(a motor control center drawer or bucket, a building,
or an enclosed cabinet) that does not exceed the
temperature, humidity, and IP ratings for the relay.
See environmental specifications in section 2.6.
3.4 Relay Features and Connections
Figure 3.1 shows the relay features and connections
to cover all the ordering options. The wiring terminal
blocks are labeled as shown on the relay.
Relay Output
Control/Alarms
Voltage Inputs
90 – 690 VAC (50/60 Hz)
1-phase or 3-phase
Zero-Sequence
CT Input for Direct or
Resistive Grounded
Power Systems
Universal Control Power
85 – 264 VAC
Built-In CurrentTransformers (CTs)
0.5A – 100A Direct
>100A with External CTs
Ethernet Port
External Reset Button Input
Figure 3.1 Relay Features and Connections
PTC (Optional)
Earth Ground
Connection Lug

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Figure 3.2 Relay Panel-Mount Dimensions
4.79 (121.67)
2.93 (74.42)
3.10 (78.74)
2.50 (63.50)
4.08 (103.63)
2.50 (63.50)
4.08 (103.63)
Figure 3.2 shows the relay drawings with dimensions
to cover all the ordering options. The wiring terminal
blocks are labeled on the relay.
3.4.1 Relay Mounted on DIN Rail
The MP8000 can be mounted on a 35 mm (1.38 in)
DIN rail. Install the relay on the DIN rail as shown in
Figure 3.3 and push the relay towards the rail until the
bottom clip latches and the relay clicks into place.
To remove the relay, use a small flat-bladed screw
driver or other similar tool. Insert the tool into the
latching clip and pry it towards the relay. The clip slides
away from the DIN rail, releasing it.
Figure 3.3 Relay Mounting on DIN Rail

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3.4.2 Relay Mounted on Solid Surface or Panel
The drawing in Figure 3.4 shows how the relay is
mounted on a panel or a flat surface. The screws are
#8 or 4 mm and the tightening torque specification is
9.0 in-lbs (1.0 Nm). Use the panel drilling template for
the location of the screw holes.
Figure 3.4
Relay Mounting on Solid Surface or Panel
3.5 Relay Connections
This section will provide a guide to complete
connections to the relay for various functions.
3.5.1 Terminal Block Connections
The connection terminal blocks are labeled on the
relay as shown in Figure 3.5
Figure 3.5 RelayTerminal Block connections labeling
The terminal blocks are depluggable and can be
removed by gently prying them with a small, flat
screwdriver. The torque requirements for the terminal
blocks are:
• Compression Plug (Black, 5.08mm spacing)
Tightening Torque
• Maximum: 0.62 Nm (5.5 in-lb)
• Earth Ground Lug Tightening Torque
• Maximum: 0.89 Nm (7.9 in-lb)
3.5.2 Wire Sizes
Acceptable wire sizes for earth grounding and terminal
blocks are shown in Table 3.1. Conductors used for
carrying the motor load should be determined by NEC
code. Strip the wire insulation for terminal blocks to 8
mm (0.31 in) before installation.
Table 3.1 Wire Connection Selection Guide
CONNECTION TYPE MIN. WIRE SIZE MAX. WIRE SIZE
Earth Grounding
Connection 18 AWG (0.8 mm2) 14 AWG (2.1 mm2)
Terminal Blocks 18 AWG (0.8 mm2) 12 AWG (3.3 mm2)
3.5.3 Voltage Connections (L1, L2, L3)
Terminals L1, L2, and L3 are used to measure the
input voltages and detect phase sequence/rotation.
The acceptable phase rotation is programmable. See
Section 4.8, Phase ACB Rotation.
Table 3.2 AC Voltage Inputs
(as High as 690 VAC Line-to-Line)
TERMINAL LABEL DESCRIPTION
L1 Line 1 (Phase A) voltage input
L2 Line 2 (Phase B) voltage input
L3 Line 3 (Phase C) voltage input

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MP8000 Motor Protection Relay
3.5.4 Power Supply Connections (A1, A2)
The POWER terminals on the relay A1 and A2 must
connect to 85-264 VAC power source (see Power
Supply in section 2.6.2 for complete power input
specifications). The POWER terminals are isolated
from chassis ground.
3.5.5 Relay Contacts (1 Form C and 1 Form A)
Connections
The MP8000 comes with one Form C (AUXILIARY)
and one Form A (CONTROL) relay contacts. They are
rated for continuous carry current of 5A at 70 degrees
C. See Table 3.3 below.
• The Motor Contactor relay coil is energized if all
conditions for safe motor operation are met.
• When the MP8000 generates a trip signal, the
relay coil is de-energized.
• The relay coil is also de-energized if the MP8000 power
supply voltage is removed or if the MP8000 fails.
The MP8000 Auxiliary relay may be energized for
alarms or other control.
Table 3.3 Two (2) Relay Contact Connections
TERMINAL LABEL DESCRIPTION
C (13)
Auxiliary relay (Form C) May be energized for
alarms or other control functions.
NO (15)
NC (14)
C (95) Motor Contactor Control (Form A) If no trip or
hold-off condition is present these contacts
will close.
NO (96)
3.5.6 Current Connections
IMPORTANT, THE WIRING REQUIREMENTS LISTED
BELOW ARE REQUIRED FOR ACCURATE POWER
FACTOR AND POWER MONITORING:
1. The current carrying conductor connected to the
L1 voltage must pass through the Phase A hole.
2. The current carrying conductor connected to the
L2 voltage must pass through the Phase B hole.
3. The current carrying conductor connected to the
L3 voltage must pass through the Phase C hole.
The MP8000 has markings on the top to indicate the
direction of the current flow. The SOURCE side (A,B,
C) is the side from which the current from the power
system flows through the relay.
The MP8000 directly supports currents up to Full-
Load Amps (FLA) of 100 A. Refer to Figure 2.1 for an
application example.The CT ratio setting is set equal to
1 for the direct current inputs. For higher FLA currents,
the relay supports external CT connections. Figure 3.6
shows an application example with external CTs. This
application requires a CT ratio equal to or greater than
10, and a CT setting equal to the primary of the CT.
For the additional information, please see Section 4.8.
All external CTs require the secondary to be 5 Amps
(150:5, 400:5, etc.).
LOW CURRENT APPLICATIONS
If improved accuracy of the current readings is desired
for applications where the FLA is less than 2 amps
the current wires may be passed through each phase
current ‘window’ multiple times (up to 10 times max).
In this configuration the CT number reflects the
number of passes through the window the wires have
been ‘looped’. Example: 5 passes of each conductor
through each CT window will require a CT ratio setting
of 5. See Table 4.3 for examples.
3.5.7 Ground Terminal Connection
Connect the ground terminal of the relay to the chassis
or cabinet ground. See Figure 2.1. Ground connection
is required to meet all EMC requirements.
3.5.8 Inputs, PTC, ZSCT Connections (optional)
Table 3.4 Input, PTC Input, ZSCT input
TERMINAL LABEL DESCRIPTION
I.1 (Reset) Normally Open Reset Button Input
(relay reset button - momentary)
T2 (PTC) PTC Thermistor input terminals
T1 (PTC)
Z2 (ZSCT) Zero-Sequence Ground Fault Current
Transformer input terminals
Z1 (ZSCT)
3.5.9 Input Connections (I.1) (optional)
Connect Terminal I.1 as a Reset (relay reset) input.
When the Normally Open Reset button is pressed,
A2 terminal voltage should be applied to I.1 (Reset)
input. Figure 2.1 shows the connection diagram for an
MP8000 Reset (relay reset) button.

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3.5.10 PTC Connections (T1,T2) (optional)
Connect the positive temperature coefficient (PTC)
thermistor to Terminals T2 (PTC) and T1 (PTC). Table
3.6 shows the maximum cable lengths for the
PTC connections.
Table 3.5 PTC Cable Requirements
WIRE SIZE, TWISTED
PAIR AWG NO.
MAXIMUM LENGTH (METERS)
SHIELDED CABLE UNSHIELDED CABLE
20 200 100
18 300 100
17 400 100
16 600 100
14 1000 100
3.5.11 Zero-Sequence Current Transformer
(ZSCT) (Z1, Z2)
(for Ground Fault detection) (optional)
The ZSCT input terminals Z1, Z2 allow you to connect
a zero-sequence current transformer for measuring
the ground fault current directly from the three-phase
motor conductors passing through it. This method
is best suited for use on high-impedance grounded
power systems. It is also preferred when a sensitive
measurement is required. The maximum length of the
twisted pair of wires from the ZSCT to the MP8000
relay terminals Z1, Z2 should be limited to 5 feet or
less and currently limited to 100A zero-sequence CTs.
Refer to Figure 2.1 for an example of ZSCT application
connections. Refer to Basic Settings in Section 4:
Littelfuse MP8000 Smartphone and Tablet
Section 4.8.5 for details on ZSCT application and
settings considerations.
3.5.12 Connecting to a PC (optional)
The PC Ethernet port is connected to the MP8000
Ethernet port using a Standard Ethernet (RJ-45) cable.
See Section 5: PC Interface for more information on
MP8000 Software installation and operation.
3.5.13 Connecting to the Littelfuse MP8000 App
Connection to the Littelfuse MP8000 App is performed
over a Bluetooth Low Energy (BLE) wireless interface.
The Littelfuse MP8000 App is available for iPhone,
iPad, and Android smartphones and tablets.
See Section 4: Littelfuse MP8000 Smartphone and
Tablet App for more information on app installation
and operation.
3.6 Motor Configuration Connection
Diagrams
The following section describes various types of
applications for the MP8000 and provides the
connection for each one. If the 3-phase voltage inputs
are not connected properly, the MP8000 will not allow
motor operation. The voltage inputs must be aligned
with the current inputs (pass through window/hole).
L1 input must connect to Line 1 (Phase A) and the
Phase A motor power wire must pass through the
Phase A "window" (hole). It must pass through the
window with the power source (side with the letter
"A") and load (motor) being on the correct side of
the MP8000.
3.6.1 Three-Phase Motor under 100 FLA with
optional ZSCT and PTC connected
See Figure 2.1. Refer to Sections 4.7 and 4.8 for
appropriate settings.

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3.6.2 Three-Phase Motor over 100 FLA
Refer to Figure 2.1 for all voltage and control wiring.
Refer to Figure 3.6 for external current transformer
wiring. Refer to Sections 4.7 and 4.8 for all settings.
NOTE: CT ratio must be changed to accommodate the
CT ratio used. Example: a CT ratio of 200:5, program
200 for CT.
NOTE: For accurate power measurements, the CT
must be wired as shown in Figure 3.6 for both direction
and polarity.
MP8000
PHASE A
PHASE B
PHASE C
ABC
M
HI
X1
HI
X1
HI
X1
See Figure 2.10 for
additional control
wiring
External CT’s
Figure 3.6 Power wiring for three-phase motors greater than 100 FLA

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3.6.3 Single-Phase Applications
Refer to Figure 3.7 for single-phase motor applications.
Refer to Sections 4.7 and 4.8 for all settings.
NO
(15)
C
(13)
.
I.2 I.1
MP8000
PTC
(OPTIONAL)
RESET
FROM A2
PE
C
(95)
L1 L3L2 A2
Z1 Z2 T1 T2
PHASE A
PHASE B
AUX VOLTAGE
SUPPLY
ABC
NO
(96)
NC
(14)
C
PILOT
STARTC
STOP
AUTO
HAND
OFF
FROM A1
M
A1
85 – 264 VAC
90 - 690 VAC
0.5 - 100A
Figure 3.7 Typical Single-Phase Motor