Operating Modes, Normal Mode, Battery Mode

Operation

8.2Operating Modes

The UPS is designed to operate as an on-line, double-conversion, reverse-transfer system in the following modes:

•Normal Mode

•Battery Mode

•Auto-Restart Mode

•Bypass Mode

•Battery Start Mode

•Maintenance Mode (Manual Bypass)

•Sleep Mode

•Paralleling Mode

Normal Mode

Operating in normal mode, the Liebert® APM™’s rectifier derives power from a utility AC source and supplies regulated DC power to the inverter, which regenerates precise AC power to supply the connected equipment. The rectifier also uses the utility source power to charge the batteries.

Battery Mode

When utility AC power fails, the Liebert APM protects the critical load by instantaneously channeling battery power to the inverter which continues supporting the critical load without interruption. When utility power returns and is within acceptable limits, the Liebert APM automatically shifts back to Normal mode, with the rectifier powering the critical load.

Auto-Restart Mode

The battery may become exhausted following an extended AC utility failure. The inverter shuts down when the battery reaches the End of Discharge voltage (EOD). The UPS may be programmed to "Auto Recovery after EOD" after a delay time if the AC utility recovers. This mode and any delay time may be programmed by the commissioning engineer.

Bypass Mode

When the Liebert APM is in bypass mode, the load is directly supported by utility power and is without battery backup protection.

The Liebert APM’s static transfer switch will shift the load from the inverter to bypass mode without an interruption in AC power if the inverter is synchronous with the bypass and any of the following occurs:

•inverter fails

•inverter overload capacity is exceeded

•inverter is manually turned off by user

NOTE

If the inverter is asynchronous with the bypass, the static switch will transfer the load from the inverter to the bypass WITH interruption in AC power to the critical load. This interruption will be less than 15ms (in 50Hz), or less than 13.33ms (in 60Hz). This interruption time may be altered by modifying the Output transfer interrupt time setting.

Battery Start Mode

The battery start option permits starting the Liebert APM with power supplied only by the batteries (at charged condition).

115-600V, 115-208, 115-120, 115-50/60HZ, 115-480 specifications

The Emerson 15-90KVA series is a robust and versatile power solution designed for various applications including commercial, industrial, and data center operations. Operating at voltage ranging from 115 to 480 volts, and supporting frequencies of either 50 or 60 Hz, this series is engineered to meet diverse power requirements.

One of the standout features of the Emerson 15-90KVA is its exceptional reliability and performance under varying load conditions. This power system incorporates cutting-edge technologies that enhance operational efficiency while minimizing downtime. The robust design of the system enables it to maintain optimal performance even in harsh environmental conditions, providing power continuity and safeguarding critical operations.

The Emerson 15-90KVA is equipped with advanced protection mechanisms that ensure the safety of connected equipment. These include overload protection, short-circuit protection, and thermal protection systems, which work together to prevent potential damage from power surges or faults. Moreover, the unit features a user-friendly interface that facilitates easy monitoring and control, enabling operators to track performance metrics and manage power supply effectively.

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Energy efficiency is a focal point for the Emerson power series. Utilizing advanced power electronics and intelligent control algorithms, the system minimizes energy losses, ensuring that more power is available for direct usage. This not only reduces operational costs but also aligns with growing sustainability initiatives by lowering the overall carbon footprint.

In summary, the Emerson 15-90KVA series is a high-performance power solution characterized by its reliability, advanced protection features, modular scalability, and energy efficiency. Its versatility across multiple voltage levels and frequency options makes it suitable for a wide range of applications, solidifying its position as a preferred choice in the industry. Whether for industrial facilities, data centers, or commercial spaces, the Emerson 15-90KVA is designed to meet and exceed power demands effectively and efficiently.

Emerson 15-90KVA, 115-120, 115-208 Operating Modes, Normal Mode, Battery Mode, Auto-Restart Mode

Models: 115-600V 115-208 115-120 115-50/60HZ 115-480 15-90KVA