Protection Relays and Controls

© 2017 Littelfuse Protection Relays & Controls

Littelfuse.com/mps

PHASE CT

PHASE CT

GF CT

PHASE CT

MPU-CIM

MPS-RTD

RTD x 8

L2

L1

MPU-32

M

(Current Input Module)

(Motor Protection Relay)

PHASE CT

PHASE CT

GF CT

PHASE CT

L2

MPS-CTU

L1

M

MPS-RTD

MPS-OPI

RTD x 8

(Control Unit)

(Temperature

Input Module)

(Temperature

Input Module)

(Operator Interface)

Motor Protection–Advanced

MPS SERIES (PGR-6300)

Motor Protection System

1

2

Description

The MPS Motor Protection System monitors voltage, current,

and temperature to provide a comprehensive package of

22 protective functions.The MPS is a modular system with

integrated protection, motor control, metering, and data-logging

functions.This system is typically used to provide protection for

three-phase low- and medium-voltage, medium-

to high-horsepower induction motors.

Operator Interface (MPS-OPI)

g

Large, bright, 4 x 20 vacuum-fluorescent display

g

Display metered values

g

Access set points

g

Powered by Control Unit

g

Panel mount or attach directly to Control Unit

g

Remote mounting (1.2 km or 4000 ft maximum loop length)

g

1/2 DIN size

g

Hazardous-location certified

Control Unit (MPS-CTU)

g

Current inputs—5-A or 1-A secondary phase current transformers

g

Voltage inputs—up to 600 V without PTs

g

Earth-leakage input—5-A or 1-A secondary or sensitive transformer

g

Tachometer (high-speed pulse) input

g

8 digital inputs, 5 relay outputs, 1 analog input and output

g

24-Vdc supply for OPI and RTD modules, and for digital inputs

g

IRIG-B time-code input

g

1/2 DIN size, surface mount

g

RS-485 network communications (Standard)

g

1

2

Phase CurrentTransformers

Phase CTs are required to detect phase

currents.

Ground-Fault CurrentTransformer

Required zero-sequence current transformer

detects ground-fault current. Available with 5-A

and 30-A primary ratings for low-level pickup.

MPS-RTDTemperature 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.

B

C

Accessories

A

ACCESSORIES

REQUIREMENT

MPS-OPI-01-00

Recommended

Phase CTs

Required

Ground-Fault CT

Recommended

MPS-RTD-01-00

Optional

MPS-DIF-01-00

Optional

SE-IP65CVR-M

Optional

1

2

ORDERING NUMBER

COMMUNICATIONS

MPS-CTU-01-00

RS-485

MPS-CTU-02-00

MPS-CTU-03-00

MPS-CTU-04-00

RS-485 & EtherNet

Ordering Information

Simplified Circuit Diagram

B

C

A

D

Rev: 4-B-061517

Based on Manual Rev: 6-F-022117