Powerware 9335 specification

contactor and together are wired to enable the inverter and rectifier to be bypassed when this path is active. The static switch, as an electronically controlled device, can be turned on immediately to pick up the load from the inverter. The backfeed protection contactor is normally always closed, ready to support the static switch unless the bypass input source becomes unavailable.

During an outage, transfers to bypass are prohibited and for the safety of those who may be working on the power lines upstream from the UPS, the back feed protection contactor is opened, preventing system output voltage from bleeding across the static switch snubber components to the bypass input source. In the bypass mode, which can be used for higher efficiency operation, the static switch is turned on to supply the load current directly from the bypass supply, with the inverter ready to take over the load if the bypass supply should vary outside preset limits.

If the inverter is unable to support the load on the output of the system, the UPS will transfer the critical load to the internal bypass. The critical load will be transferred automatically to the internal bypass if any of the following abnormal conditions occur on the output of the system: If the output of the system exceeds acceptable voltage tolerances; Critical load current exceeds the overload specifications of the inverter; Inverter failure. The transfer is initiated by turning on the static switch and blocking the IGBT gate signal. This kind of transfer is normally referred to as a Make-Before-Break transfer. The transfer takes place in less than 4 ms (one-quarter cycle) to ensure loads on the systems output are not interrupted. The static switch remains on until either the inverter is able to support the system output or the unit is placed into a maintenance position where repairs can be made.

If the UPS initiates its own transfer to bypass for any reason other than operator intervention, the UPS will attempt to restart the inverter (if not running already) and attempt a retransfer back on line to support the output of the system. Three attempts will be made within ten minutes to bring the inverter back on-line automatically before the UPS will lock out any further attempts. After three attempts have been made, the UPS will remain in bypass and an alarm condition will be annunciated. The UPS can also be transferred to bypass using the front panel controls.

Bypass mode is a normal operating mode, not requiring an alarm condition. However, if the UPS is unable to return to Normal mode following an automatic transfer to Bypass mode, an alarm condition is recorded.

Powerware 9335 (80 kVA and120 kVA) Installation and Operation	5-7
164201396 REV. A 071103

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.