OnLine Power

3-2-2 Turning off the Fire Alarm Back-up UPS1481 :

1.Turn off the Output Breaker(s), if provided.

2.Turn off the Battery Breaker.

3.Turn off the Input Breaker, if provided.

3-3 Theory of Operation

Illustration NO TAG is a simplified block diagram of the Fire Alarm Back-up UPS1481. This diagram provides an excellent tool in identifying the major building blocks within the Fire Alarm Back-up UPS1481 .

1.External Main input circuit breaker (CB2) — The main input circuit power provides overcurrent protection to the input side of the Fire Alarm Back-up UPS1481 .

2.Input Contactor (KI) — The microprocessor based control circuitry:

•Verifies UPS to be normal condition and not the one ‘at fault”.

•Verifies correct input voltage and frequency to be within acceptable range and commands the closure of this. Contactor via control transformer T2 and fuse Fl.

3.Input Chokes (LI, U) — They act as a filter and an important circuitry of an up chopper, boosting input voltage to a higher internal DC bus voltage.

4. Battery charger — The battery charger converts AC power into regulated DC power to charge and to maintain the charge on the battery bank. The charger is fully automatic with a current limiting feature so that damage will not occur to the batteries in case of a charger malfunction. The charger is sized such that the batteries will be maintained at full charge even when the input voltage is at the low line limit for indefinite periods of time.

5.Battery — The battery bank, consisting of eight (8), ten (10), sixteen (16), or twenty (20), 12 volt, VRLA batteries, provides the reserve energy to power the load when suitable AC input power is not present. The batteries are sealed, maintenance—free construction.

6.Inverter — When the AC input power is not available to power the load, the inverter converts the energy stored in the battery bank to AC power to supply the powers the load. The pulse width modulated (PWM) inverter utilizes high speed, high efficiency IGBT5 for fast response, sinusoidal power.

7. DC Choke (U) — If helps boosting battery voltage to an internal higher DC bus voltage.

8.Output AC Choke (L4) — This acts as a buck circuit component connecting high DC bus voltage to an appropriate AC output voltage.

(6002-1646) REV.X8

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IBM UPS1481 UNIT user manual Turning off the Fire Alarm Back-up UPS1481
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UPS1481 UNIT specifications

The IBM UPS1481 is a robust uninterruptible power supply (UPS) designed to ensure the seamless operation of critical equipment in various environments, including data centers, telecommunications, and enterprise applications. This model is particularly noted for its reliability, efficiency, and advanced features, catering to the demands of modern IT infrastructures.

One of the main features of the UPS1481 is its high-capacity output, which can handle significant power loads. With an impressive power rating, the unit is equipped to support various devices, from servers to networking equipment, guaranteeing that essential operations remain uninterrupted during power outages or fluctuations. This capability is crucial for maintaining business continuity and minimizing potential downtime.

In terms of technology, the IBM UPS1481 integrates advanced power management systems that provide real-time monitoring and control. This functionality allows users to track power consumption, battery status, and overall system health through an intuitive interface. Additionally, the UPS includes features such as an automatic voltage regulator (AVR), which helps stabilize voltage levels, protecting connected equipment from surges, spikes, and drops that can cause damage or data loss.

The UPS1481 also comes with a modular design, allowing for scalability. Users can expand the capacity of the UPS to meet growing power demands without needing to replace the entire unit. This flexibility is beneficial for organizations undergoing rapid growth or technological upgrades.

Another important characteristic of the IBM UPS1481 is its energy efficiency. Designed to comply with various energy standards, the unit operates with minimal power loss, thereby reducing operational costs and contributing to a greener environment. By optimizing energy usage, organizations can enhance their sustainability initiatives while ensuring reliable power protection.

Furthermore, the UPS1481 offers a robust battery system that supports extended runtime options. Users can configure the UPS with additional battery packs to ensure that critical systems remain operational for extended periods during extensive outages.

In summary, the IBM UPS1481 UNIT stands out for its high capacity, advanced power management features, modular design, and energy efficiency. It is an ideal solution for businesses looking to safeguard their critical equipment and maintain operational integrity in the face of power disruptions.
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