Liebert 1000kVA manual Battery Racks or Cabinets, Module Battery Disconnect, Pulse Rectifier

Introduction

2.Battery Racks or Cabinets

The battery racks are specifically designed for stationary service batteries. They are painted with electrolyte-resistant paint for corrosion resistance. Battery cabinets are available for 150 through 600kVA modules.

3.Module Battery Disconnect

The UPS system utilizes a separate Module Battery Disconnect for remotely located batteries. A sensing circuit in the UPS module, set at the battery low voltage limit, trips the Module Battery Disconnect to safeguard the battery from excessive discharge. The Module Battery Disconnect has an undervoltage release mechanism designed to ensure that during any shutdown or failure mode all battery potential is removed from the UPS system.

4.Input Current Distortion Filter

This filter reduces rectifier input current reflected harmonic distortion to less than 7% reflected THD and less than 4% reflected THD for modules with the optional 12-pulse rectifier. The filter is factory installed within the UPS. This filter also improves the input power factor to better than 0.92 lagging.

5.12-Pulse Rectifier

All 500-750kVA models may be ordered with the optional 12-pulse rectifier section; this feature is standard in 1000kVA models. This provides input isolation and reduces input current reflected THD to less than 9% or less than 4% with optional input filter.

6.Isolation Transformers

An optional rectifier input isolation transformer is available in a matching transformer cabinet; this feature is standard in 1000kVA models. A bypass isolation transformer is also available.

7.Three Breaker Maintenance Bypass

This switchboard provides make-before-break maintenance bypass. It includes: UPS Bypass Input Breaker (BIB), Maintenance Bypass Breaker (MBB) and Maintenance Isolation Breaker (MIB).

8.Two Breaker Maintenance Bypass

This switchboard provides make-before-break maintenance bypass. It includes: Maintenance Bypass Breaker (MBB) and Maintenance Isolation Breaker (MIB).

9.Load Bus Synchronization (LBS)

The Load Bus Sync (LBS) option keeps two independent UPS systems (and therefore their critical load buses) in sync, even when the modules are operating on batteries or asynchronous AC sources. This means that critical loads connected to both load buses through a Static Bus Transfer Switch can be switched seamlessly between the two.

10.SiteScan Central Monitoring System

Liebert manufactures a central monitoring system that automatically displays key UPS measure- ments and alarms, as well as data from a variety of sensors. This monitoring system activates alarms so corrective action can be taken. Events and data can be printed in hard copy. Data can be logged for analysis.

11.Remote Monitor Panel

The UPS system may also be provided with an optional Remote Monitor Panel. This Panel pro- vides eight LED indicators and may be placed at a convenient location near the critical load. A functional description of the Remote Monitor Panel is provided in 3.0 - Operation of this manual.

12.Customer Alarm Interface

This optional interface board allows the input and display of 8 alarms from customer-supplied contacts, each with a customer-selected name of up to 16 characters. The following attributes can be user programmed for each alarm: latching, summary, freeze history, sound horn, auto-dial and time delay (0 to 999.9 seconds).

13.Temperature-Compensated Charging

When battery temperature climbs above a preset limit (typically 77 degrees F), this optional cir- cuit proportionally reduces float charging voltage to prevent overcharging the battery.

14.Battery Load Testing

When activated, this option forces the battery string to assume the load for a short period of time. The UPS then compares the test results to data collected during the UPS commissioning to see if the battery system appears to meet specifications.

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