operation (cont')

3

AC input

2

6

load

7

5

Fig. 20

battery duration

During an AC input power failure, the duration of inverter operation on battery power depends on:

■ the rated capacity of the battery; ■ the power drawn by the load; ■ the battery temperature;

■ the age of the battery.

The rated backup time corresponds to a minimum for a new battery and with the inverter operating at the rated load.

The real backup time, which depends on the power drawn, may be greater if the inverter operates at less than full rated load. It is possible, during operation on battery power, to increase the battery backup time by reducing the power drawn by the load (shedding of non-priority circuits).

Comet has a battery monitoring function that calculates the remaining backup time. This function may be implemented with a communications option.

A low battery shutdown warning signal is available via the standard communication connector 15 for remote indications. It warns the user of upcoming battery shutdown at a user-determined level of remaining power.

On the UPS itself, the buzzer

17 beeps louder and more rapidly, and the

orange "battery status" light

20 flashes.

The end of battery power occurs when the battery is fully discharged. At this

point, the inverter 7 shuts down.

The recharge time required to restore the battery to its rated backup power varies between 4 and 16 hours depending on the Comet model.

return of AC input power

When the AC input power failure ends or power returns to within tolerances: ■ if the end of battery backup power was not reached, Comet returns to the operating status described above (figure 19);

■ if the end of battery backup power was reached, the rectifier 2 , the charger 6 and the inverter 7 automatically start up (the inverter must be manually started if the system is in manual start mode).

6.2

Comet installation and user manual: E-6761200XT/FA

Merlin Gerin by MGE UPS SYSTEMS

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MGE UPS Systems Comet TM 5 - 30 kVA user manual Battery duration, Return of AC input power
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Comet TM 5 - 30 kVA specifications

MGE UPS Systems Comet TM 5 - 30 kVA is a reliable and efficient uninterruptible power supply (UPS) designed to ensure the smooth operation of critical systems in various applications. This UPS is particularly suited for data centers, telecommunications, and industrial environments that require high availability and robust power protection.

One of the main features of the Comet TM series is its modular design, which allows users to scale the UPS capacity as needed. This flexibility is crucial for businesses that anticipate growth or fluctuating power requirements. The UPS is available in a range of capacities, from 5 kVA to 30 kVA, allowing for tailored solutions that fit specific power needs.

The Comet TM is equipped with advanced double conversion technology, which provides clean and reliable power, isolating the connected equipment from input voltage disturbances. This technology ensures that any fluctuations in the mains supply, such as voltage sags or surges, do not affect the operation of sensitive electronic devices. Additionally, this UPS features a wide input voltage range that contributes to improved efficiency and reduced energy consumption.

An impressive aspect of the Comet TM is its high-efficiency mode, which optimizes energy consumption while maintaining power quality. This mode reduces operating costs and contributes to lower carbon footprints, making it an environmentally friendly choice. Furthermore, the UPS incorporates intelligent battery management systems, which enhance battery performance and extend their lifespan. This is essential in minimizing downtime and ensuring that backup power is readily available when needed.

The user-friendly interface of the Comet TM allows for easy monitoring and management of the system. With graphical displays and comprehensive alarms, users can promptly identify potential issues and take corrective actions. Remote management capabilities are also built into the system, enabling users to monitor and control the UPS remotely, which is particularly beneficial for businesses that operate across multiple locations.

In summary, the MGE UPS Systems Comet TM 5 - 30 kVA is designed for organizations that need reliable power protection and high efficiency. With its modular scalability, advanced double conversion technology, high-efficiency mode, intelligent battery management, and user-friendly interface, the Comet TM series stands out as a robust solution for critical power applications. Its combination of features ensures that businesses can maintain uninterrupted operations while benefiting from cost savings and a reduced environmental impact.
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