Littelfuse PGR-6300 User Manual

Protection Relays & Controls

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)

(Temperature
Input Module)

Motor Protection–Advanced

MPS SERIES (PGR-6300)

Motor Protection System

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-

1

2

Simplified Circuit Diagram

PHASE CT

A

PHASE CT

L1
L2

Ordering Information

MPS-OPI

1

(Operator Interface)

MPS-CTU

(Control Unit)

ORDERING NUMBER COMMUNICATIONS

MPS-CTU-01-00 RS-485

MPS-CTU-02-00 RS-485 & DeviceNet

MPS-CTU-03-00 RS-485 & Profibus

MPS-CTU-04-00

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

GF CT

B

PHASE CT

™

®

2

RS-485 & EtherNet/IP™ & Modbus

MPS-RTD

(Temperature
Input Module)

C

M

®

TCP

RTD x 8

to high-horsepower induction motors.

1

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

2

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

DeviceNet™, Profibus®, or Ethernet communications available

Accessories

A

B

C

D

Phase Current Transformers

Phase CTs are required to detect phase
currents.

Ground-Fault Current Transformer

Required 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.

© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/mps

Rev: 4-A-050213

Based on Manual Rev 5

Protection Relays & Controls

Motor Protection–Advanced

MPS SERIES (PGR-6300)

Motor Protection System

Features & Benefits

FEATURES IEEE # BENEFITS

Overload 49, 51
Current unbalance/

Phase loss/Phase reverse

46 Prevents overheating and extends motor life

Overcurrent/Jam 50, 51 Prevents catastrophic failures and fires and extends motor life
Undercurrent 37 Detects low-level or no-load conditions
Ground fault 50G/N, 51G/N Prevents catastrophic failures and fires

RTD temperature

38, 49

Overvoltage 59 Prevents stress to insulation
Undervoltage 27 Prevents a start attempt when it will damage the motor
Voltage unbalance 47 Detects unhealthy supply voltage
Phase differential 87 Provides sensitive protection for high-resistance winding faults
Dynamic thermal mode
Reduced overcurrent mode
Starter control Simplifies the installation by reducing component count
Metering Displays the measured and calculated motor parameters
Data logging On-board 64-event recorder helps with system diagnosis
Communications Remotely view measured values, event records & reset trips
Conformal coating Internal circuits are conformally coated to protect against corrosion and moisture

Extends motor life and prevents insulation failures and fires

Optional RTD temperature protection (MPS-RTD module) for
high ambient or loss of ventilation protection

Provides protection through starting, running, overload, and cooling cycles
Minimizes Arc-Flash hazards during maintenance

Wiring Diagram

PHASE CURRENT
TRANFORMERS

(required)

A

33 22

30 29 27 26 23 22

RELAY

OUTPUTS

2

1

CONTROL

POWER

5 16

......

GROUND-FAULT
CURRENT
TRANSFORMER

(required)

PHASE

VOLTAGES

20 17

MPS-CTU

CONTROL UNIT

RS-485

35 37

......

......

B

ANALOG
OUTPUT

4-20 mA

+

39 40

MPS-OPI

OPERATOR
INTERFACE

MPS-RTD

RTD MODULE

MPS-DIF

DIFFERENTIAL
MODULE

60 56

I/0 MODULE

43 51

(recommended)

(optional)

(optional)

53 52

+

ANALOG

DIGITAL
INPUTS

......

4-20 mA

INPUT

Specifications

Protective Functions
(IEEE Device Numbers)

1

C

Input Voltage 65-265 Vac, 25 VA; 80-275 Vdc, 25 W

D

Power-Up Time 800 ms at 120 Vac
Ride-Through Time 100 ms minimum
24-Vdc Source 100 mA maximum
AC Measurements True RMS and DF T, Peak, 16 samples/cycle, and

positive and negative sequence of fundamental

Frequency 50, 60 Hz or ASD
Inputs Phase current, Earth-leakage current, Phase voltage,

7 digital, tachometer, 1 analog

Output Contacts 5 contacts — See Product Manual
Approvals CSA Certified, C-Tick (Australian)
Communications Allen-Bradley® DFI and Modbus® RTU (Standard);

DeviceNet™, Profibus®, Ethernet (Optional)

Conformally Coated Standard feature
Warranty 10 years

2

Mounting
(Control Unit) Surface

(Operator Interface) Panel, Control-Unit mounted

Overload (49, 51)
Phase reverse (current) (46)
Overfrequency (81)
Overcurrent (50, 51)
Jam
Underfrequency (81)
Ground fault (50G/N, 51G/N)
Undercurrent (37)
Unbalance (voltage) (47)
Failure to accelerate
RTD temperature (38, 49)

Unbalance (current) (46)
Underspeed (14)
Starts per hour (66)
Phase loss (voltage) (47)
Overvoltage (59)
Differential (87)
Phase loss (current) (46)
Undervoltage (27)
Phase reverse (voltage) (47)
Power factor (55)

© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/mps

Rev: 4-A-050213

Based on Manual Rev 5