Rackmount Solutions VA 3000, VA 700, VA 10000 Display and Operation Elements Active, Overload Load

Chapter 2 Display and Operation Elements (Active)

The Uninterruptible Power System (UPS) is connected between AC power and the load. It protects the load against mains disturbances, especially power failures.

Its operation is based on the on-line principle. The connected load is supplied power through the UPS’s inverter. Power disturbances from the mains are suppressed which increases the loads’ operational security (PC, network server, multi-user systems etc.)

In the event of a mains failure, maintenance-free batteries provide an uninterrupted supply of energy. In practice, mains failures are of relatively short duration, dependent on the mains quality. Therefore, the UPS’ energy is in most cases sufficient to ensure continuous operation of the connected systems, until the mains is reestablished. In the event of a longer lasting mains failure it allows for controlled shutdown of connected systems.

The UPS indicates by acoustical (buzzer) and optical (LED) alarms that a mains failure has occurred and is still persistent. Battery runtimes vary depending upon load, number of batteries and environmental conditions.

The following chart shows the approximate values of the emergency runtime (assuming fully charged battery at the onset of the mains failure.)

• The actual battery capacity can be read from the LED-”battery” chain (see table below).

35 - 55%

55 - 75%

75 - 95%

95 - 100%

The most reliable method for determining actual battery runtime is the application of Chloride MopUPS® software. With this software, the prospective remaining battery capacity is indicated before and during an AC power failure. Furthermore, shutdown procedures can be automated. Depending on the application program, operating system and computer hardware, it can be ensured that in the event of a power failure the application programs are automatically closed, the subscribers logged in at the server are logged out, the data is stored and the operating systems are shut down. For further information please refer to our publication about the Chloride ManageUPS™NET SNMP Adapter.

After return of the mains voltage, the UPS automatically initiates a restart. The connected systems are restarted according to their specifications.

In the event of overload or internal failure, the load is supplied from the mains via an automatic bypass. As soon as the normal status is reestablished, automatic switchover to inverter operation is performed.

This operation manual contains all relevant information to install and operate the UPS.