Eaton COOPER POWER SERIES, Installation And Operation Instruction Manual

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CBC-8000 capacitor bank control description
CBC-8000 capacitor bank control installation and operation instructions
MN916001EN—October 2018
Eaton.com
9
If the control is in Manual or Automatic mode and the
REMOTE button is pressed, any trip or close operation that
was initiated when the control was in Manual or Automatic
mode is performed before the control changes to the
Remote operating mode.
Remote SCADA override
Remote SCADA override is a special remote control request,
to trip or close the capacitor bank. It has a control table
priority that is higher than all of the other control table
priorities, except for Manual control.
Automatic mode
The Automatic operating mode allows control of the
capacitor bank, based on local conditions, while preventing
manual or remote control of the capacitor bank except when
the Remote SCADA Override trip or close command is used.
Note: The AUTO LED illuminates when the control is in
automatic operating mode.
If the control is in Manual or Remote mode and the AUTO
button is pressed, any trip or close operation that was
initiated when the control was in Manual or Remote mode is
performed before the control changes to Automatic
operating mode.
The following automatic control operations are supported:
• Seasonal control – Seasonal control allows the control to
use a different set of control parameters for two separate
control seasons.
• Over Voltage Under Voltage control – Capacitor bank
control is based on the line voltage measurement and
whether or not it is outside of a configurable Over Voltage
Under Voltage (OVUV) threshold for a configurable period
of time.
• Emergency voltage control – Capacitor bank control is
based on the line voltage measurement and whether or
not it is outside of a configurable Emergency OVUV
threshold for a configurable period of time.
• VAR control – Capacitor bank control is based on the
fundamental kvar measurement and whether or not it is
outside of a configurable threshold for a configurable
period of time.
• Time control – Capacitor bank control is based on the
time of day.
• Temperature control – Capacitor bank control is based on
the temperature measurement and whether or not it
outside of a configurable threshold for a configurable
period of time.
• Sensor Input control – Capacitor bank control is based on
the sensor input value and whether or not it is outside of a
configurable threshold for a configurable period of time.
• Current control – Capacitor bank control is based on the
sensor input current value and whether or not it is outside
of the current threshold for a configurable period of time.
• Neutral current fault control – Monitors the health of the
capacitor bank by using the fundamental neutral current
measurement to determine if there is a phase imbalance.
A phase imbalance is common when a capacitor’s fuse is
blown or when a capacitor switch has failed. If a fault
condition is detected, the control will not perform any
control operation.
• Neutral current verification – Capacitor bank operation is
verified by comparing the fundamental neutral current
measurement to a configurable set point.
• Communications loss control – If the control does not
hear from the master station for a configurable period of
time, the control will allow operations to occur based on
local metrics.
• Adaptive voltage control – Capacitor bank control is
based on a predictive algorithm that determines whether
or not a capacitor bank operation will cause an OVUV
condition or emergency voltage condition.
If the resulting control action will place the voltage
outside of the OV, UV, or emergency voltage thresholds,
then the CBC rejects the control command.
Seasonal control
The seasonal control feature is used to configure two
separate seasonal time periods for the following control
methods:
• Voltage control
• VAR control
• Time control
• Temperature control
When seasonal control is enabled, each control method
within season 1 or season 2 can have a unique set of control
parameters.
Over Voltage Under Voltage control
The Over Voltage Under Voltage (OVUV) control feature
allows control of the capacitor bank if the line voltage
measured by the control is outside of the configurable OVUV
thresholds for a configurable period of time.
• The control supports the following OVUV thresholds:
• Non-seasonal OVUV thresholds – Used when the
control performs non-seasonal control.
• Seasonal OVUV thresholds – Used when the control
performs seasonal control.
• Comms Loss OVUV thresholds – Used when the
control loses communications with the master station.
• CVR thresholds – Used when the control performs
CVR (Conservation Voltage Reduction) control.
• The configurable periods of time that the line voltage must
be outside of a threshold are the OV track time and UV
track time, which are in seconds.