Protection Relays & Controls
© 2013 Littelfuse Protection Relays & Controls
Littelfuse.com/mps
Motor Protection–Advanced
PHASE
VOLTAGES
MPS-CTU
CONTROL UNIT
RELAY
OUTPUTS
I/0 MODULE
DIGITAL
INPUTS
4-20 mA
ANALOG
INPUT
+
ANALOG
OUTPUT
4-20 mA
+
39 40
53 52
43 51
......
5 16
......
1
2
60 56
20 17
......
33 22
CONTROL
POWER
RS-485
35 37
......
30 29 27 26 23 22
PHASE CURRENT
TRANFORMERS
GROUND-FAULT
CURRENT
TRANSFORMER
OPERATOR
INTERFACE
MPS-OPI
(recommended)
(required)
(required)
MPS-RTD
RTD MODULE
(optional)
(optional)
MPS-DIF
DIFFERENTIAL
MODULE
Wiring Diagram
A
B
C
D
1
2
Specifications
Protective Functions
(IEEE Device Numbers)
Input Voltage 65-265 Vac, 25 VA; 80-275 Vdc, 25 W
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 DFT, 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
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)
Features & Benefits
FEATURES IEEE # BENEFITS
Overload 49, 51
Extends motor life and prevents insulation failures and fires
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
Optional RTD temperature protection (MPS-RTD module) for
high ambient or loss of ventilation protection
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
Provides protection through starting, running, overload, and cooling cycles
Reduced overcurrent mode
Minimizes Arc-Flash hazards during maintenance
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
MPS SERIES (PGR-6300)
Motor Protection System
Rev: 4-A-050213
Based on Manual Rev 5
(3 Seiten)
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