Options

5.0OPTIONS

5.1Load Bus Synchronization

The Load Bus Synchronizer (LBS) keeps the output of two independent UPS systems or parallel UPS systems in synchronization even when the systems are operating in different modes and even when either or both systems are operating on batteries. When the LBS is used, one UPS system is desig- nated as master, the other as slave.

The LBS option is typically used with dual-corded equipment or with either the Liebert SmartSwitch or Static Transfer Switch (STS) for single-corded equipment.

5.1.1Performance Requirements

The DBS operates under the following conditions:

Both master and slave are on inverter

(either system may be on inverter through the rectifier or on inverter through the batteries)

Master on inverter, and slave on bypass

Master on bypass, and slave on inverter

Master and slave on bypass IF the bypass source is the same for both systems

5.1.2DBS Cable and Settings

For NX-to-NX dual bus configuration, only one optional LBS cable is required, the built-in LBS will operate normally without extra LBS control box or interface box. The LBS port is X4 on the parallel board (M3). The parallel board is on the interior of the NX, above and left of the power electronics; see Figure 30.

An optional, 9-pin LBS cable is used to connect two UPS systems through each system’s DB9 port on its parallel board. For two parallel systems, the LBS cable can be mounted between any two units belonging to different parallel systems. For information about the LBS kit or to order the optional equipment, see your local Liebert representative.

The LBS cable is connected as illustrated in Figure 21.

Figure 21 Load Bus Synchronization cable connection

Parallel Board

 

X3

X4

 

X2-1

X2-2

X1-1

X1-2

LBS Cable

Parallel Board

X4

 

X2-1

X2-2

X1-1

X1-2

The parallel board is on the interior of the NX, above and left of the power electronics; see Figure 30

UPS Module or

UPS Module or

System #1

System #2

The LBS function is activated with configuration software; when the LBS takes effect, the graphic LCD will display “LBS active.”

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Emerson 10-30kVA Load Bus Synchronization, Performance Requirements, DBS Cable and Settings, LBS Cable, System #2

10-30kVA specifications

The Emerson 10-30 kVA, 208V uninterruptible power supply (UPS) solution is a robust system designed to provide reliable power protection for critical applications in commercial and industrial settings. This UPS is ideal for safeguarding IT equipment, communication systems, and other sensitive electronics against power disturbances and interruptions.

One of the standout features of the Emerson 10-30 kVA UPS is its modular design, allowing for flexibility and scalability. This means that as the power needs of a facility grow, the UPS can be easily expanded without requiring a complete system overhaul. This modularity contributes to a more efficient use of resources and minimizes operational costs.

The UPS also incorporates advanced technologies such as double-conversion online architecture, which provides the highest level of power quality. This technology ensures that the output power is consistently clean and stable, effectively eliminating harmful voltage fluctuations and frequency variations. Consequently, connected load receives a pure sine wave output, preventing potential damage or operational issues with sensitive equipment.

Another key feature is the high efficiency rating of the Emerson UPS, which exceeds 95 percent in typical operating conditions. This high efficiency translates to reduced energy costs and a smaller carbon footprint, aligning with modern sustainability goals. The cooling system is designed to be efficient as well, ensuring optimal performance while maintaining a compact footprint.

The user-friendly interface enhances operability, featuring an intuitive LCD display that allows for easy monitoring of critical power parameters. Users can access real-time data related to battery health, load levels, and operational status, which aids in effective management of the power supply.

Battery management is another critical aspect of the Emerson UPS. It employs advanced battery management technologies to ensure optimal battery life and performance. Features such as intelligent battery testing and monitoring help predict potential battery failures before they occur, allowing for proactive maintenance and minimized downtime.

In summary, the Emerson 10-30 kVA, 208V UPS offers a combination of modularity, high efficiency, advanced technologies, and effective power management features that cater to the demanding needs of critical applications. With its reliable performance and user-friendly operation, this UPS solution is an excellent choice for organizations looking to protect their valuable equipment from power disturbances.