Figure 85. Timing Diagram For The Star/Delta Operation Mode; Figure 86. C445Um: Monitoring User Interface; Figure 87. C445Uc-I0: Iec Control And Status; Figure 88. C445Uc-I1: Iec Status Only - Eaton Power Xpert C445 User Manual

Star/Delta Operation Mode
Description
The Star/Delta starter control provides the logic to control a
Star/Delta connected motor.
C445 outputs:
Q1 output – star/delta motor starter LINE coil (NO)
●
Q2 output – star/delta motor starter DELTA coil (NO)
●
Q3 output – star/delta motor starter STAR coil (NO)
●
A STOP command deactivates all contactor controls
effectively dropping out the motor.
A START command activates the STAR contactor control
then activates the LINE contactor control after the Network
Contactor Delay expires initiating a start in the STAR winding
configuration. This parameter can be found in the Operation
Mode category in the Power Xpert inControl Software Tool.
Switching to Delta: The control will switch to delta when the
control detects the motor is up to speed or when the
Maximum Star Winding Time expires. The STAR contactor
control will first be deactivated. The DELTA contactor control
will then be activated after the net delay time expires and
current readings = 0. The Maximum Star Winding Time
parameter can be found in the Operation Mode category in
the Power Xpert inControl Software Tool.
The control will set MOTOR1 as the active motor parameters
when starting in the star configuration and will set MOTOR2
as the active motor parameters when running in the delta
configuration.
The C445 will issue a control fault when:
Run command is active and phase voltage is present with
●
no phase current detected after delay expires
Stop command active and current detected after delay
●
expires
Note: Even with the control fault disabled, the C445 will
NOT transition to the delta winding until current
readings in star decrease to zero.
Figure 85. Timing Diagram for the Star/Delta Operation
Mode
Timing Diagram
Settle Time
Control Fault Delay
LINE
STAR
Settle Time
DELTA
Max Star Time
Control Fault Delay
Power Xpert C445 Global Motor Management Relay MN042003EN—October 2016 www.eaton.com
Chapter 5—System Configuration and Operation
Recommended User Interface Options for the
Star/Delta Operation Mode

Figure 86. 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 and Stop buttons are enabled in Star/
Delta. Users may optionally disable local start or reset
functionality if desired.
C445UM may still be used in Star/Delta 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.

Figure 87. C445UC-I0: IEC Control and Status

Figure 88. C445UC-I1: IEC Status Only

Figure 89. C445UC-I4: IEC Control and Status

81