Intelligence made easy

Eaton Power Xpert® C445

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Why sacrifice simplicity for intelligence. The Power Xpert C445 motor management relay is powerful yet simple. An intuitive user interface provides advanced motor monitoring, parameter editing, and complete fault identification with no specialty tools or knowledge required. Commissioning is easy with the user interface or Eaton’s Power Xpert inControl software. Multiple built-in network options and free integration tools like EIP-Assist and Add-on Instructions make connecting C445 to any PLC or DCS system fast and error free.

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STEP 2: Explore Settings

STEP 3: Edit a Value

STEP 4: Complete Wizard


Press “YES” to complete Setup Wizard on the user interface

Press NEXT button to walk through and learn about each item in the Setup Wizard.

Let’s change Trip Class to learn how to edit in the user interface 1. Press “EDIT” (TIP: Pressing and holding edit will open digit edit mode)

2. Use arrow keys to change value. (TIP: Holding arrow key will speed up change)

3. Press “SAVE”

Press NEXT button to walk through the remaining settings and complete setup. The remaining settings are all motor nameplate data.

You've reached the end of this demo. Thanks for completing the Setup Wizard demo.

1. Let’s go through a quick demonstration of how to edit a value by enabling Low Power Trips using the User Interface. Press MODE/BACK until the PRG menu is highlighted

2. Use arrow key to scroll down to 7. Protections

3. Press “OK”

4. Press “OK” again to select 1. General

5. Press “OK” to view enabled protection trips in “1. Protection Enable”

6. Press “OK” again to view enabled protection trips in “1. Trip Enable”

7. Use arrows to scroll to Low Power

8. Press “EDIT” to change

9. Select the checkmark to enable this protection. Press “SAVE”

You've reached the end of this demo. Thanks for completing the Viewing/Editing Parameters demo.

1. Press Start

2. Scroll through “I – Current” menu to see values

3. Explore other menus by pressing MODE/BACK:  V – Voltage, P – Power, T – Thermal, O – Other

You've reached the end of this demo. Thanks for completing the Motor Monitoring demo.

1. Simulate a “Overvoltage fault” by pressing the Overvoltage fault button.

2. The system will fault after a few seconds. Press the Overvoltage button again.

3. Press the RESET button. Fault warnings will stop.

4. Press the START button.

5. Fault is reset. Demo is over.

1. “Low Power Fault”. Press the button to start the demo.

2. The system will fault after a few seconds. To clear the fault press the Low Power Fault button again.

3. Press RESET.

4. The fault has reset. Press the RUN button.

5. The start light should be solid red. Demo is over.

1. "Overload Fault". Press the button to start the demo.

2. Percentage of overload will go up and then the system faults. To clear the fault press the Overload Fault button.

3. Press RESET.

3. Press RESET.

4. System should go back to normal level. Press Start.

5. System will go to a solid state. Demo is over.

1. "Zero Sequence/High Resistance Ground Fault". Press the button to start the demo.

2. The "FAULT" LED will turn red and the fault screen will become active. To clear the fault press the GF Zero Sequence Fault button.

3. Press reset button.

4. Demo is over.

1. "Ground Fault Pulse Detection". Press the button to start.

2. The warning light will turn on and unit will continue to function. To remove the warning press the Ground Pulse Detection button again.

3. The warning light will turn off. Demo is over.

< Back to previous step

Low Power Fault

Overload Fault

GF Zero Sequence Fault

Ground Fault Pulse

Overvoltage Fault


Setup Wizard

Motor Monitoring

Fault Diagnostics


When you first power your system, Setup Wizard will prompt. The wizard will walk you through the required settings. While further customization is possible, this is all you need to get up and running!

You can also complete the wizard in Power Xpert inControl instead of the User Interface. The same settings are in both.

Active Operation Mode defines what type of application the device will be configured for. This pre-configures I/O such as defining two outputs for contactor control in Reverser. If Overload Only is set, the device will act like a standard overload relay instead of a motor management relay (protection only, no control). The default mode is Direct (forward, non-reversing starter).

Local Control Source selects the source for local control for all modes except Overload Only (control is done outside of C445 in Overload Only). The default is User Interface. Fieldwire or None are other options.

If the User Interface is not the Local Control source or if a control button is disabled, the LCD screen will indicate this when pressed.

Remote Control Source selects the source for remote control for all modes except Overload Only. The default is Fieldbus, but Fieldwire or None can also be selected.

As a motor management relay, control signals can be sent to C445 directly from the network with no hardwired auto circuit required.

2-Wire/3-Wire allows the user to customize control behavior. Selecting 3-Wire control will change how inputs are defined if fieldwire is used as a control source.

3-Wire control uses a dedicated start and stop (permissive) input while 2-wire control uses a single Run input

Trip Class sets the overload behavior—It is user settable from 5-40.

The overload function models thermal characteristics of a motor and generates a trip before motor damage occurs.

Trip curves are defined by agency standards. A lower setting has a lower trip time.


Only Motor1 values will appear for single motor operation modes. Two-motor operation modes will have Motor1 and Motor2 settings.

Users can enter rated power in HP or Watts. Press NEXT for Watts. Only one value must be entered.

Users can always re-run the wizard at PRG >14. Setup Wizard.

Users can change any parameter in C445 with the user interface or Power Xpert inControl. Often initial commissioning may be done with inControl so that a file can be saved and copied to multiple devices.

Ongoing troubleshooting and maintenance may then be done with the user interface—this is especially nice for maintenance personnel who may not have a PC with software installed handy. Don’t worry, password protection can be set for any source that makes changes.

C445 makes faults easy to diagnose and correct by providing a full fault description and data automatically on the screen.

C445 provides comprehensive motor and system monitoring on the user interface broken into simple menu groups. Users can also monitor this data over the network or in Power Xpert inControl. (TIP: You can set a default measurement value to return to after an Idle period or after pressing and holding MODE/BACK in PRG > User Interface Settings.)

Select each number to learn more

Power Xpert inControl


C445 Modules Overview

Welcome to the Power Xpert C445 Global Motor Management Relay Online Demo. A typical C445 system includes the following components and tools.

  • A Monitoring User Interface, Base Control Module and Measurement Module
  • Optional accessories such as Communication Cards and the Real Time Clock / Memory Backup Module
  • System Connection Cables
  • Power Xpert inControl configuration software

Monitoring User Interface (C445UM)

Base Control Module (C445B…)

On-board I/O

Communication Cards (C445XC…)

Real Time Clock and Memory Backup Module (C445XO-RTC)

On-board Modbus Serial (RS-485) Port

Measurement Module (C445M…)

Voltage Terminals

PTC Terminal

Expansion I/O

Ground Fault Module

Zero Sequencing/Ground fault current transformers (C445XG-CTx)

Power Xpert inControl

The window to the C445 system– unlocking advanced functionality in an intuitive format.

It provides:

  • A quick start wizard
  • System monitoring
  • Parameter editing
  • Fault diagnostics
  • Optional local control
  • Micro USB port

C445UM mounts safely on the Motor Control Center or Enclosure door.

This module is the core of the system and provides monitoring, protection and control algorithms.

  • Basic motor protection - default overload setting
  • Modbus communications
  • Logic engine is function block, programing internal and external I/O, system parameters, control of remote vs local control and etc.
  • Internal and expansion I/O
  • Control source can be changed from remote to local via the logic engine
  • Ground fault detection and monitoring
  • Advanced motor control options
  • Provides power for the C445 system devices and is available in 120-240 Vac or 24 Vdc input voltages

The base control module offers on board I/O:

Four Digital Inputs:

  • Terminal on front
  • 120Vac or 24Vdc
  • Predefined by operation mode if fieldwire is selected as a control source
  • Unused inputs can be used as general purpose.

Three Relay Outputs (2 NO + 1 Form C NO/NC):

  • Terminals at bottom
  • Predefined by operation mode for contactor control and protection
  • Unused outputs can be used as general purpose

When installed in the Base Control Module, the resulting solution is compact:

C445XC-E (shown):

  • Modbus TCP and Ethernet/IP
  • Allows 4 Simultaneous Ethernet connections
  • Embedded web pages
  • Allows Power Xpert inControl connectivity using Modbus TCP


  • Profibus DVP1 and DVP0
  • Provides both a D-SUB connector and an A/B terminal for more compact wiring

Installs behind the communication card and provides two key functions

Real Time Clock Function:

  • Time stamping
  • Clock stored as Modbus registers that can be synced to an upstream clock by the network master
  • Battery backed-up with an alarm for low battery

Memory Backup Function:

  • Fast, error free device replacement
  • Stores configuration data to non-volatile memory
  • If placed in a new unit, automatically copies configuration to new device
  • Not reliant on the battery

An additional Modbus serial port provides connection to any Modbus master. This serial network can be run alongside another network such as Ethernet/IP or Profibus.

The port also provides a single point of connection to upgrade firmware on any or all connected modules using the C445XS-USBLEADS cable.

Base Control Module Part Numbers ending in M have Modbus Serial on-board

This module is used to measure the current, voltage, PTC, residual ground and provides the ground fault pulse detection. The module size is based on the current measurement. If higher currents are needed an external CT can be used on each phase for currents between 136 and 800A.

C445MA… 45mm frame:

  • 0.3 to 45A systems

C445BA… 55mm frame:

  • 9-72A systems


  • 17 to 136A systems

Connection for voltage measurement—required for voltage and power monitoring and protection.

Measurement Part Numbers ending in A & V have voltage terminals

Optional input to connect a Positive Temperature Coefficient sensor—Accepts Mark A type as described in EN 60947-8/A1:2006.

Measurement module parts ending in A have a PTC input.

Utilizing the ELC I/O and communication card allows the Base Control Module to expand I/O up to 64 inputs and 64 outputs plus 8 analog cards at the same time. Examples of the available I/O:

  • Digital input both 24Vdc and 120Vac
  • Digital output – relay and transistor
  • Analog cards – 4-20mA, -10 to +10Vdc
  • Temperature PT100 RTD, and thermocouple (J, K, R, T etc)

The ground fault module is used in conjunction with the zero sequencing ground fault current transformers (CT). This module accepts the output of the corresponding CTs and communicates to the base module.

30mA to 10A sensitivity for monitoring ground currents in high, medium and low resistance grounded power systems.

These CTs when used in conjunction with the ground fault module (C445XG-MOD) will detect zero sequencing currents 30mA to 10A.

  • C445XG-CT2 – aperture size 25mm circular
  • C445XG-CT3 – aperture size 52mm circular
  • C445XG-CT4 – aperture size 63mm circular
  • C445XG-CT7 – aperture size rectangular 80 X 175mm

A free software tool for commissioning of Eaton control products. Two ways to connect:


Allows you to connect to multiple devices on the network from one location – best method for MCC commissioning. *Requires C445XC-E card


One-to-one connection using micro USB port on User Interface or front of Base Control Module. Connect with C445XS-USBMICRO

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