Multi-phase control display
The CL-7 control is able to cycle through displays for settings
and metering information. When in the multi-phase mode
of operation, the LEDs number 1, 2 and 3 are used to
designate which regulator information is being displayed on
the LCD screen and status LEDs.
Figure42. Multi-phase LEDs designate the regulator
active on the display
Pressing the right arrow button will cycle through the
displays for each connected regulator.
When in the multi-phase mode, after the LCD display goes
into the power-save mode by powering down, the status
LEDs on the control will automatically cycle through to
display the status of all connected regulators. The setting for
the cycle time is set at FC 211.
Multi-phase regulation settings
When the control is operating in the multi-phase mode,
there are a number of settings that are considered to be
control settings and still others that are specific to each
connected voltage regulator and are considered to be
regulator settings.
The control settings include the following:
FC 1 to FC 5 and FC 51 to FC 55 – Forward and Reverse
Direction Settings (when not in Advance Independent
multi-phase mode)
FC 40 – Control Identification
FC 42 – Control Operating Mode
FC 43 – System Line Voltage
FC 46 – Demand Time Interval
FC 148 – Nominal Sec Load Voltage
FC 56 – Reverse Power Mode
FC 80 – Voltage Limiter and other associated Voltage
Limiter function codes
FC 70 – Voltage Reduction Mode and other associated
Voltage Reduction function codes
FC 170 – Tap To Neutral
FC 171 – Tap To Target
FC 79 – Soft ADD-AMP and other associated other Soft
ADD-AMP function codes
The regulator settings are set individually for each regulator.
When entering the settings, scroll through the display for
each regulator by pressing the right arrow key. The multi-
phase LED with cycle through as the arrow is pressed
and will indicate which regulator is active for each specific
control parameter.
The regulator settings include:
FC 1 to FC 5 and FC 51 to FC 55 – Forward and Reverse
Direction Settings (when in Advance Independent multi-
phase mode)
FC 140 – Regulator Type
FC 49 – Tap Changer Type
FC 41 – Regulator Configuration
FC 44 – Overall PT Ratio
FC 44 – Internal PT Ratio
FC 45 – CT Primary Rating
FC 45 – Rated Load Current
FC 45 – % C.T. Rating Level 4
FC 45 – % C.T. Rating Level 3
FC 45 – % C.T. Rating Level 2
FC 45 – % C.T. Rating Level 1
FC 144 – P.I. ADD-AMP High Limit
FC 145 – P.I. ADD-AMP Low Limit
FC 146 – Vin PT Configuration
FC 141 – Regulator Identification
FC 39 – Source Voltage Calculation
Auto tap dead phase
An advantage of using the multi-phase control is the Auto
Tap Dead Phase feature. This feature enables the operation
of the voltage regulator on a dead phase. When power is
lost to one phase, power from the other phases can be
used to operate the regulator on the dead phase. Enabling
this option can be done either on the control HMI using FC
220 through FC 222 or using ProView NXG software.
The Auto Tap Dead Phase options are Tap To Neutral and
Ganged Mode. The Tap To Neutral option will tap the
dead phase regulator to the neutral position until power
is restored. The Ganged Mode will gang operate the
regulators, keeping them on the same tap position until
power is restored. There is also a delay timer that will delay
the operation of the dead phase for a user defined period of
time.
136
INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN225003EN April 2018
CL-7 Voltage Regulator Control
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