Xantrex Technology 809-0912 manual AC Load Shedding

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FSequence IPM Owners Guide.book Page 34 Thursday, October 6, 2011 3:33 PM

Freedom Sequence Operational Concepts

AC Load Shedding

When the current draw from the main AC source increases beyond the current clamp, Freedom Sequence power manager starts to shed (to disconnect) AC load circuits in a priority order set by the installer. Circuits having the lowest ranking priority gets shed first.

Freedom Sequence takes into account the Line Association of a circuit for load shedding when it operates with a split phase AC source. It will shed the circuit with lowest ranking priority with the group of circuits associated to the line that is overloaded.

When it operates from a single phase supply, Freedom Sequence does not check for line association before shedding the lowest ranking priority load circuit.

After an overload condition is detected, Freedom Sequence waits for two seconds to check if the overload persists before disconnecting a load circuit. If the overload condition is corrected it will not disconnect any load circuit, otherwise, it will shed the lower ranking priority circuit.

If disconnecting of one load circuit was not enough to correct the overload condition, the power manager will continue to shed the next lowest priority ranking load that is On until the overload condition is corrected.

The Freedom Sequence power manager keeps in its onboard memory the current each load circuit was drawing before it got disconnected. This current is displayed on the SCP as the Last Shed Current. The power manager uses the two values, Reconnect MRGN and Last Shed Current to determine if adequate headroom of current is available to reconnect the load circuit. If the headroom of current was available throughout the Connect Seq Delay period the power manager would reconnect the

circuit. However, if during this Connect Seq Delay period the available headroom falls below the Reconnect MRGN plus Last Shed Current then, the power manager will not reconnect the circuit.

The Freedom Sequence power manager will reconnect circuits in the order of highest ranking load circuit in the Off setting. When operating on a split- phase AC, the power manager will reconnect specifically those load circuits which are associated to the line that has adequate headroom.

While operation on a single-phase AC, the power manager will not check for line associations.

See the illustration on the next page.

 

 

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Freedom Sequence Intelligent Power Manager Owner’s Guide

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Contents Freedom Sequence Page Contact Information About This Guide Purpose Conventions UsedRelated Information Important Safety Instructions ReferencePrecautions When Placing the Power Manager Explosion HazardRisk of Damage to the Power Manager FCC Information to the UserContents Page Standard Features IntroductionMaterial List Compatible Products and Accessories1 Product/Accessory Product NumberTypical Xanbus System Diagram Xanbus SystemMechanical Features Ports and TerminalsTypical RV Wiring Typical RV Wiring Diagram With Freedom SequencePower Manager Configuration EnterFuncPower Manager Configuration Cont Circuit StatusCircuit Status Circuit Status Config Basic Configuration SettingsList of configurable settings includes Priority List of circuit configurable settings includesCircuit Config To change the Mode from the Device Status screen ModeMode OperatingShore Breaker Mode SHR BKR ModeAuto ManualBreaker Ratings Shore Breaker Rating30.0A 25.0ARestore Defaults Restore DefaultsTo Restore Defaults from the Device Status screen Circuit Priority Circuit ConfigurationConfig Circuit To change the priority setting from the Device Status screen Config Circuit ConfigEnabled Load ShedTo change the Load Shed from the Device Status screen Load ShedAdvanced Settings Improper Configuration DUE to Lack of ExperienceBKR Derating List of advanced settings includeAdvanced Settings Config Advanced Settings Breaker DeratingGenerator Warmup Delay GEN Warmup DelayGenerator Breaker Rating Screen10sec Connect Sequence DelayConnect Seq Delay AC Disqualification Priority AC Disc Priority12.0V DC Voltage SettingNom DC Voltage Circuit Name Circuit Level Advanced SettingsCircuit2 AC Relay Settings DC Relay SettingsCircuit Name Circuit3Circuit Type AC Line Priority Generator Soft StartBattery Voltage Triggers Reconnect MarginFreedom Sequence Operational Concepts Auto-Detection of AC Input Source Shore/GenAuto-Detection of AC Input Source Type 1-Ph/2-Ph Loading of Shore/Generator Breaker RatingsAC Load Shedding LINE1 L1 LINE2 L2 Using DC Relay to control AC load circuits DC Load SheddingPriority Swapping Between Circuits Override the AC Circuit Load Shedding Battery Voltage Measurement Generator Run Detection B+ SignalFreedom Sequence Interaction with Other Xanbus Devices Freedom SW Interactive Charger De-rating ICDFreedom Sequence SCP Menu Map Specifications Warranty and Return Information WarrantyWarranty and Return Information Disclaimer ProductReturn Procedure Return Material Authorization PolicyOut of Warranty Service Information About Your System Page Xantrex Technology USA Inc
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