5.2.1 Normal Mode

Figure 5–2 shows the path of electrical power through the UPS system when the UPS is operating in Normal mode.

Normal Mode

IA1

 

K4

K1

Input Filter

 

F1

Static Switch

Rectifier

Booster

Inverter

K2

 

IA2

Breaker

Contactors

Switches

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Closed

Open

Battery

Breaker

Battery

Battery

Charger

Main Power

Trickle Current

Energized

De-Energized

Figure 5–2. Path of Current Through the UPS in Normal Mode

During normal UPS operation, power for the system is derived from a utility input source through the input contactor K1 (and externally protected utility feed). “Load Protected” appears on the LCD display and indicates the incoming power is within voltage and frequency acceptance windows. Three phase AC input power is converted to DC using a full-wave, six-pulse, solid-state rectifier block which supplies unregulated DC voltage to a boost converter which in turn supplies a higher, regulated DC voltage to the inverter.

A separate internal battery charger is used to maintain the proper charge level on the battery during normal operation. The battery charger derives its input from the booster output and provides regulated DC voltage and charge current to the battery. The battery charge condition is monitored by the UPS and, when abnormal, reported by the status indicators located on the LCD display. The battery is always connected to the UPS and ready to support the inverter should the utility input become unavailable.

5-4

Powerware 9335 (80 kVA and 120 kVA) Installation and Operation

 

164201396 REV A 071103

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Powerware 9335 operation manual Normal Mode

9335 specifications

The Powerware 9335 is a robust and efficient uninterruptible power supply (UPS) designed to deliver reliable power protection for critical applications. Expanding upon Eaton's tradition of offering advanced power management solutions, the Powerware 9335 is tailored for environments that demand high availability and uptime.

One of the standout features of the Powerware 9335 is its double-conversion online topology, which ensures a continuous supply of clean and regulated power. This design operates without any transfer time to battery power, effectively protecting sensitive equipment from all types of power disturbances, including surges, sags, and outages.

The UPS is available in a range of power ratings, from 8 kVA to 40 kVA, making it versatile enough to support a variety of applications ranging from small server rooms to larger data centers. The modular architecture of the Powerware 9335 allows for seamless scalability, enabling users to add additional capacity or redundancy as their power needs evolve. This feature is particularly beneficial in dynamic environments where equipment and loads can frequently change.

Another significant characteristic of the Powerware 9335 is its high efficiency, often exceeding 94% in normal operation. This efficiency not only reduces energy costs but also minimizes heat generation, leading to lower cooling requirements. The UPS employs advanced technologies such as Intelligent Power Management and Smart APM (Adaptive Power Management) to optimize power usage, further enhancing its overall performance and reducing the total cost of ownership.

The user-friendly LCD display furnishes real-time data regarding UPS status, battery condition, and power settings, facilitating proactive management and monitoring. In addition, the unit can be monitored and managed remotely, ensuring that administrators can access critical information even when they are not on-site.

The Powerware 9335 also comes equipped with various connectivity options, including USB, serial, and SNMP for seamless integration into existing IT infrastructure. Additionally, advanced communication capabilities allow for integration with building management systems, ensuring comprehensive power management and reporting.

Safety is paramount, and the Powerware 9335 incorporates numerous features designed to protect both the UPS and connected equipment. This includes overload protection, battery health monitoring, and environmental monitoring, which collectively contribute to a resilient power protection strategy.

In summary, the Powerware 9335 is an exceptional UPS offering from Eaton, featuring high availability, scalability, efficiency, and robust management options. With its advanced technologies and features, it stands out as a premier choice for organizations seeking to safeguard their critical systems and data.