Chapter 6—Motor Protection
110
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
Chapter 6—Motor Protection
Introduction
The Power Xpert C445 is capable of providing fully
configurable intelligent motor protection. Programming
the numerous protection parameters can be accomplished
through a variety of methods including the monitoring
user interface, Power Xpert
in
Control Software tool,
communication networks, or built-in Web Pages (Ethernet
options only).
WARNING
The C445 may reset at any time enabling a motor start.
The Base Control Module monitors motor current, supply
voltage, power, and frequency to provide advanced motor
protection. The software contained in the Base Control
Module is central to the monitoring of a wide range of motor
and load functionality. In this section, various features and
protection options are described.
The purpose of this section is to provide detailed information
regarding the trip and alarm thresholds and time delays of
the warning functions of the monitoring user interface,
Power Xpert
in
Control Software tool, communication
networks, or built-in Web Pages (Ethernet options only).
Configuration Parameter Locking
The configuration parameters can be locked for three sets of
registry values.
●
Motor-running Lock
●
Administrator Lock
●
USB Lock
Each lock will prevent the changing of select parameters
unless a password is entered. A password may be created
for each lock separately using any number from 1 to
4,294,976,295. Setting the password to 0 will result in the
lock being disabled.
CAUTION
Record all passwords in a safe location. Once a password has
been set it cannot be displayed. If a password is forgotten
the only method of resetting the password(s) is a factory
reset.
For a list of the parameters that will be included for each of
the three locks, refer to
Appendix D
– Modbus Register
Map.
Motor Running Lock
When the motor is commanded to run and/or there is motor
current flowing, this feature will lock selected parameters.
Any attempt to write values to those parameters will be
ignored. An error exception code will be returned to the
sender. Reading the values is allowed. When parameters are
not locked, reads and writes follow normal behaviors.
Using the C445UM user interface or the Power Xpert
in
Control Software Tool, navigate to the following parameter:
●
Param Lock – to set the password (default 0). Register
5009
●
Param Lock – to login (enter password). Register 5010.
Note:
The Motor Running Lock parameter Param Lock will
display a value of 0 if a no password has been
programmed into the unit (default). If the C445 has
been programmed with a password, a value of 0 will
be displayed if logged out, or a value of 4,294,976,295
will be displayed when logged in, in order to obscure
the set password value.
Administrator Lock
This feature sets an administrative password to lock selected
parameters. Any attempt to write values to locked
parameters will be ignored. An error exception code will be
returned to the sender. Reading the values is allowed. When
parameters are not locked, reads and writes follow normal
behaviors.
Using the C445UM user interface or the Power Xpert
in
Control Software Tool, navigate to the following parameter.
Password settings are in the PRG
R
Security menu in
C445UM.
Admin Password – to set the password (default 0). Register
5000
Admin Password – to login (enter password). Register 5002
Note:
The Administrator Password parameter Admin
Password will display a value of 0 if a no password has
been programmed into the unit (default). If the C445
has been programmed with a password, a value of 0
will be displayed if logged out, or a value of
4,294,976,295 will be displayed when logged in, in
order to obscure the set password value.
USB Lock
This feature sets a password on USB communication access.
Other communications are not locked.
Any attempt to write values to locked parameters will be
ignored. An error exception code will be returned to the
sender. Reading the values is allowed. When parameters are
not locked, reads and writes follow normal behaviors.
