Rockwell Automation Publication 825-UM004D-EN-P - November 2012
13
Chapter
1
Introduction
Overview
The 825-P Motor Relay is designed to protect three-phase motors. The basic
relay provides locked rotor, overload, unbalance, and short circuit protection.
Voltage-based and RTD-based protection is available as an option. All relay
models provide monitoring functions.
This manual contains the information for installing, setting, testing, operating,
and maintaining an 825-P. It is not necessary to review the entire manual to
perform specific tasks.
A Quick Start Guide, Publication 825-QS001, is also available. It will help to step
the first-time user through the device commissioning process.
Features
Standard Protection Features
•
Thermal Overload (thermal model)
•
PTC (positive temperature coefficient) Overtemperature
•
Undercurrent (Load Loss)
•
Current Imbalance and Phase Loss
•
Overcurrent (Load Jam)
•
Short Circuit
•
Ground Fault (Residual)
•
Ground Fault (Zero Sequence)
•
Motor Starting/Running
–
Protection Inhibit During Start
–
Start Motor Timer
–
Notching or Jogging Device
–
TCU (Thermal Capacity Utilization) Start Inhibit
–
Anti-Backspin Timer
–
Emergency Start
–
Two Speed Protection
–
Reduced Voltage Starting (Star-Delta)
–
Stall-Speed Switch
•
Frequency
Summary of Contents for 825-P
Page 1: ...Modular Protection System for Motors Catalog Number 825 P User Manual...
Page 4: ...4 Rockwell Automation Publication 825 UM004D EN P November...
Page 64: ...64 Rockwell Automation Publication825 UM004D EN P November 2012 Chapter 5 Using MPS Explorer...
Page 234: ...234 Rockwell Automation Publication 825 UM004D EN P April 2012 Chapter B ParameterList...
Page 265: ......