S&C BankGuard PLUS, Инструкции по устранению неисправностей, Страница: 13 / 16

13 1011-550
Alarm Indicator LED and button
If this “LED” is ON, the control device has set a voltage alarm the bank/reactor (based
on the “Alarm Level” and “Alarm Time Delay” setpoints). To clear the LED and the
alarm, click the ALARM INDICATOR RESET button. Click OK.
NOTE: If the conditions that led to the alarm are still present, the control device will set
the alarm again after the “Alarm Time Delay” has elapsed.
Model Number
This field shows the model number for this control device.
Control Software Revision
This field shows the S&C name for the Control Device software version present in this
control device.
Serial Number
This field shows the serial number of this control device.
Installation Type
This is the type of installation with which this control device is used: ungrounded wye-
connected shunt capacitor bank (“Ungnd Wye Cap Bank”), grounded wye-connected
shunt capacitor bank (“Gnd Wye Cap Bank”), or ungrounded wye-connected shunt
reactor (“Ungnd Wye Reactor”). This value is set on the
Setup screen.
N-G/Unbalance Voltage
For ungrounded, wye-connected capacitor banks / reactors these fields display the
capacitor bank neutral-to-ground voltage. The maximum voltage displayed is 65,536
Volts divided by the voltage sensor ratio. This field will display that maximum value
even when voltage is above that limit. When the Installation Type is
Gnd Wye Cap
(Grounded Wye Capacitor Bank) this field displays the sum of the three intermediate-
tap-point voltages (percent of unbalance) in percent.
Unbalance Compensation in Use
This field shows the present magnitude of the correction value that the control device
is using to compensate for neutral-to-ground error voltages. These voltages may be
caused by system voltage imbalances and/or inherent capacitor unit variations. If the
Unbalance Compensation feature is disabled, this field displays “Disabled”.
Lockout Level
This is the voltage level or tap-point voltage percent imbalance at which the control
device isolates and locks out the bank or reactor after capacitor unit or reactor turn
failures.
Lockout Time Delay
This is the amount of time (in seconds) that the neutral-to-ground voltage must exceed
the “Lockout Level” setpoint before the control device isolates and locks out the bank
or reactor.
Alarm Level
This is the voltage level or tap-point voltage percent imbalance at which the control
device issues an optional alarm.