Chapter 5—System Configuration and Operation
98
Power Xpert C445 Global Motor Management Relay
MN042003EN—January 2019
www.eaton.com
MCCB Feeder Operation Mode
The MCCB feeder operation mode has two modes of
operation with actuation and without actuation.
When MCCB actuation is enabled, it provides remote control
capability for MCCB installed with motor operators. A close
command will activate Output 1 for the programmed pulse
width providing a close signal to the motor operator. An open
command will activate Output 2 for the programmed pulse
width providing an open signal to the motor operator.
MCCB parameters:
●
MCCB Actuation Enable
●
Actuation Pulse Width
CB On & CB Alarm auxiliary relays provide feedback,
reporting MCCB feeder open, close, & trip status.
In this mode, inputs can used to provide feedback on CB On
and Alarm status. If this feedback is provided, C445 will issue
a control fault if the commanded state does not match the
feedback signal. The parameter “Feedback Signal Source”
selects where the inputs are wired to the C445. Options
include the Base Control Module, the Control User Interface
or to a controller where they are sent to the C445 via a
communication network. For all three locations these input
feedback signals may be wired, the actual input or bit is
pre-defined for each as follows.
●
0 – No Feedback Source
●
1 – Base Control Module: Input 2 (CB On),
Input 3 (CB Alarm)
●
2 – Control User Interface (C445UC..): Input 2 (CB On),
Input 3 (CB Alarm)
●
3 – Input Register 602 from a controller: Bit 1 (CB On)
and Bit 2 (CB Alarm)
Figure 98. Timing Diagram for MCCB Feeder Operation
Mode
The C445 will issue a control fault when:
●
An Open command is active and the CB On feedback input
is true.
●
The CB On & CB Alarm feedback inputs are both “high” at
same time.
●
Current is detected after an open command.
●
A Close command is active and the CB On feedback input
is false.
When the C445 experiences a fault/inhibit condition Output 2
will be activated for the programmed pulse width to open the
breaker feeder.
●
Output 1 – close control (NO)
●
Output 2 – open control (NO)
●
Output 3 – open for user configuration and their function
can be selected by the user.
Recommended User Interface Options for the
MCCB Feeder Operation Mode
Figure 99. C445UM: Monitoring User Interface
The Monitoring User Interface can be used with any
operation mode. If selected as a local control source, the
User Interface Start (Close) and Stop buttons are enabled in
MCCB Feeder Mode. Users may optionally disable local Start
(Close) or reset functionality if desired.
C445UM may still be used in MCCB Feeder if the User
Interface is not the local control source. Start, Stop and Auto
buttons will be disabled. If pressed, the screen will notify the
user that this functionality is not enabled. Control Status
LEDs indicating running, stopped and Auto status will still
function.
CLOSE
Command
Timing Diagram
Pulse Width
If CB ON aux = open
Issue Control fault
CLOSE
Output
OPEN
Output
Pulse Width
Control Fault Delay
If CB ON aux = closed
Issue Control fault
Control Fault Delay
