12 Introduction
1.6 Options
Anumber of standard pre-designed options areavailable from Liebert for your UPS system. Described beloware
themost frequently provided options. Note thatthe battery items (1-3) are required to complete theUP Ssystem.
Theremaining options provide improved system performance or convenience.
1. Battery
Thebatteries provide power in the event of a power outage. The LiebertUPS can use a variety of battery
types,provided the battery plant is designed for the UPS DC voltagerange and the load requirements of
yourapplication.
2. BatteryRacks or Cabinets
Thebattery racks are specifically designed for stationary servicebatteries. They are painted with electrolyte-
resistantpaint for corrosion resistance. Battery cabinets are availablefor 150 through 600 kVA modules.
3. Module Battery Disconnect
TheUPS system utilizes a separateModule Battery Disconnect for remotelylocated batteries. A sensingcir-
cuitin the UPS module, set at the battery low voltage limit,trips the Module Battery Disconnect to safe-
guardthe battery from excessive discharge. The Module BatteryDisconnect has an undervoltage release
mechanismdesigned to ensure that during any shutdown or failure mode all batterypotential is removed
fromthe U PS system
4. Input Distortion Filter
Thisfilter reduces rectifier input current reflected harmonic distortion to less than 7% THD, and less than
4%THD for modules with the optional 12-pulse rectifier. The filteris factory installed within the UPS. This
filteralso improves the input power factor to better than 0.92 lagging.
5. 12-PulseRectifier
Certainmodels may be ordered with the optional12-pulse rectifier section. This providesinput isolation and
reducesreflected input current THD to less than 9%, or less than 4% with optionalinput filter.
6. IsolationTransformers
Anoptional rectifier input isolation transformeris available in a matching transformer cabinet. A bypassiso-
lationtransformer is also available.
7. ThreeBreaker Maintenance Bypass
Thisswitchboard provides make-before-break maintenance bypass.It includes: UPS Bypass Input Breaker
(BIB),Maintenance Bypass Breaker (MBB), and Maintenance Isolation Breaker (MIB).
8. TwoBreaker Maintenance Bypass
Thisswitchboard provides make-before-break maintenance bypass.It includes: Maintenance Bypass
Breaker(MBB) and Maintenance IsolationBreaker (MIB).
9. LoadBus Synchronization (LBS)
TheLoad Bus Sync (LBS) option keeps two independent UPS systems (and therefore their criticalload
buses)in sync, even when the modules are operating on batteries or asynchronous AC sources.This means
thatcritical loads connectedto both load buses through a Static Bus TransferSwitch can be switched seam-
lesslybetween the two.
10. SiteScan Central Monitoring System
Liebertmanufactures a central monitoring system that automatically displays key UPS measurementsa nd
alarms,as well as data from a variety of sensors. This monitoring systemsignals alarms so corrective action
canbe taken. Events and data can be printed in hard copy. Data can be loggedfor analysis.
11. RemoteMonitor Panel
TheUPS system may also be provided with an optional Remote Monitor Panel. ThisP anelprovides eight
LEDindicators and may be placed at a convenient locationnear the critical load. A functional description of
theRemote Monitor Panel is provided in 3.0 - Operation of this manual.
12. CustomerAlarm Interface
Thisoptional interface board allows thei nputand display of 8 alarms from customer-suppliedcontacts, each
witha customer-selected name of up to 16 characters. The following attributes can be userprogrammed for
eachalarm: latching, summary, freeze history,sound horn, auto-dial, and time delay (0 to 999.9 seconds).
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