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The MPU-32 Motor Protection Unit is used to provide currentand temperature-based protection, metering, and data logging for three-phase low-voltage medium-horsepower induction motors. This relay is ideal for retrofitting and upgrading obsolete or aging motor protection using existing CTs. See the PMA Family of Panel Mount Adapter Kits to replace common obsolete relays.
The MPU-CIM Current Input Module is the interface between the MPU-32 relay and the 5-A-secondary, 1-A-secondary, and sensitive current transformers. The MPU-CIM is ordered separately from the MPU-32 and can be surface- or DIN-rail mounted. Wire-clamping terminals are standard but the MPUCTI is available for those who require ring-tongue terminals.
| ORDERING NUMBER | COMMUNICATION |
| MPU-32-00-00 | TIA-232 |
| MPU-32-01-00 | TIA-232 & TIA-485 |
| MPU-32-02-00 | TIA-232 & DeviceNet™ |
| MPU-32-04-00 | TIA-232 & EtherNet/IP™ & Modbus® TCP |
| ACCESSORIES | REQUIREMENT |
| Phase CTs | Required |
| MPS-RTD-01-00 | Optional |
| MPS-DIF-01-00 | Optional |
| MPU-32-SMK | Optional |
| CA-945 | Optional |
| MPU-16A-Y92A-96N | Optional |
Phase Current Transformers
Phase CTs are required to detect phase currents. For upgrade applications, existing CTs can be used.
Ground-Fault Current Transformer
Optional zero-sequence current transformer detects ground-fault current. Available with 5-A and 30-A primary ratings for low-level pickup.
MPS-RTD Temperature Input Module
Optional module provides 8 inputs to connect Pt100, Ni100, Ni120, and Cu10 RTDs.
MPS-DIF Differential Current Module
Optional motor differential protection, compatible with core balance and summation current transformer connections.
MPU-32
Install The MPU-32 For Advanced Functionality
MP8000 Series
Bluetooth-enabled Interface
777 Series
Simplify Motor Safeguarding With The 777 Series
A large oil & gas exploration company made what is expected to be one of the biggest oil and gas discoveries of the decade in the Permian region’s western part of Texas. The company began evaluating several brands of protection relays to protect their investments in pumps and motors, optimise productivity, and improve safety. After the company’s engineers tried the Littelfuse Bluetooth® Overload Relay MP8000, the search was over.
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Our brands are carefully selected and have a great track record of quality, reliability and safety.
Since being established in 1996, our company has been synonymous with great customer service.
Fuseco has strong relationships with many clients from a wide range of industries.
The MP8000 has a wide voltage and current range and operates on 50/60 Hz to protect any motor or pump.
It can also be used to retrofit older current-only based electronic overloads.
It can operate between 90-690VAC and 0.5-1,000A.
-40oC to 70oC
Traditional relays require the user to open the electrical cabinets (where relays are typically installed) panel door to use the relay, whether it’s to modify the settings, or to review the cause of a trip event.
Opening the panel door exposes the worker to shock hazards. Bluetooth, however, enables remote access to these settings, metering and data log information which prevents personnel from unnecessarily having to open the door, thus less exposure to risks.
The MP8000 can be used in both single phase and 3 phase applications.
Yes, the MP8000 can be put into current-only mode which will disable voltage-based protection functions. However, Littelfuse strongly recommends utilizing the voltage-based protection functions for superior protection especially prior to motor startup.
The current-only mode is intended for retrofit applications on voltages above 690 VAC.
The MP8000 can be surface or panel mounted, or installed on a DIN rail.
No, the MP8000 uses Bluetooth to connect to your smart phone or tablet via the Littelfuse app, This enhances the users safety as it allows remote access.
Yes, you can access the information remotely through the Littelfuse MP8000 PC software or through other software programs communicating with the MP8000 through the Ethernet interface. Contact Fuseco for information on how to download this software.
Hi Tim, just wanted to thank you and the Fuseco team for your help. You've managed to help us solve some nagging issues here and the Littelfuse SE-330AU relay installation has saved us a lot of time. Thanks!
Mark Sherman
PGS Silver, Queensland
Just wanted to send a note of thanks to you guys. When it comes to relays, your advice & service is high level & appreciated. Cheers.
Jesse Marshall
Newcrest WA
The Littelfuse SE-701 & the CT's are functioning well. Thanks guys, really appreciate your help. Good to work with people you can rely on.
Cliff Peligro
Alpha Coal, Queensland
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