Eaton COOPER POWER SERIES Installation And Operation Instruction Manual

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CBC-8000 capacitor bank control descriptionCBC-8000 capacitor bank control installation and operation instructions MN916001EN—October 2018 Eaton.com 13Adaptive voltage sensingAdaptive voltage sensing is a predictive algorithm that isused to determine if a control operation will cause an OVUVor emergency OVUV voltage condition. The average deltavoltage, which measures the change in voltage due to acapacitor bank operation, is used along with a 10 secondaverage of the instantaneous line voltage to see if a controloperation will cause the voltage to be outside of the OVUVthresholds or emergency voltage thresholds.If the pending control operation will cause an OVUV oremergency OVUV voltage condition and it has a priority lowerthan OVUV or emergency voltage control, the controloperation is ignored. Any control operation that has a higherpriority than OVUV or emergency OVUV voltage control isallowed.Adaptive voltage sensing is used only if OVUV control oremergency voltage control is enabled.Note: The average delta voltage is only updated when thecontrol believes its operation changed the capacitorbank to the opposite state.For example, if the capacitor bank is closed and you executea close command, or if the capacitor bank is open and youexecute a trip command, the control will not update theaverage delta voltage reading since the control did notchange the state of the capacitor bank.AlarmingAlarming allows the control to set alerts under specificconditions. The alarming feature is used to indicate when anevent or condition has occurred. The control supports threetypes of alarms:• Data – Sets an alarm if a metering value stays outside athreshold for a configurable period of time. High and lowthresholds may be set for each metering value. Dataalarming is available for the following conditions:• Line voltage: high, low and THD.• 3-phase: kvar high and low, kW high and low.• VAR power factor: leading and lagging.• Temperature: high and low.• Sensor inputs 1 through 6: high and low.• Neutral current: total, fundamental, and THD.• Phases A through C: voltage total high and low, voltageTHD, current total, current THD, leading power factor,lagging power factor, kW high and low, kvar high andlow.• Status – Sets an alarm if a status value stays active for aconfigurable period of time. Status alarms include:• Phases A through C: power flow• VAR power flow• Event – Sets an alarm if a specific event occurs. Eventalarms that can be viewed on the front panel displayinclude:• Abnormal delta voltage• AC power present• Bad active relay: close or trip• Control request• Controller mode• Ignored control reason• Maximum operations count• Neutral current lockout• Operation failed• Override mode: CVR or SCADA• Power fail• Relay stuck: closed or tripped• Relay sense failed• Track timer: sensor input 1-6, emergency, fault current,OVUV or varInformation about an alarm can be stored in the Sequence ofEvent (SOE) log.Note: Alarms are not enabled by default and they must beconfigured by using the front panel or with theProView NXG software.Priority table controlPriority table control is used to determine if one controlmethod can override another control method when morethan one control method is enabled. The following table liststhe default priority level for each control method and if thatcontrol method’s priority is configurable.Note: The lower the number, the higher the priority.If more than one control method has been configured withthe same priority, the default priority level is used todetermine which control method has the highest priority.Table 2. Priority control levels.Default PriorityLevelControl Method Priority LevelConfigurable?0 Manual Control No1 SCADA Override Yes2 Fault Current Control Yes3 Emergency OVUV Yes4 Time Control (when set to On/Off) Yes5 OVUV Control Yes6 VAR Control Yes7 Phase A Secondary Voltage Yes8 Phase B Secondary Voltage Yes