Control Cables, Frequency Converter Mode

Electrical Connections

Frequency Converter Mode

If a frequency converter configuration is used, connect the AC input supply cables to the rectifier input busbars (A-B-C terminals). Torque to 88 lb-in (10N-m) for M8 bolts. Ensure correct phase rota- tion. There will not be any AC bypass supply cables to the bypass input (A-B-C terminals) and tighten the connections.

NOTE

The operations described in this section must be performed by authorized electricians or qualified technical personnel. If any difficulties arise, contact Liebert at 1-800-LIEBERT.

NOTE

For frequency converter operation, ensure that the linking busbars between the bypass and the rectifier input are removed.

2.2Control Cables

2.2.1Monitor Board Features

Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery system (external battery circuit breaker, battery temperature sensor), communicate with a personal computer or provide alarm signaling to external devices or for Remote Emergency Power Off (REPO). The monitor board, arranged for this purpose, is located on the rear of the operator access door. The main features are:

•Input and Output dry contacts signal (one pair of contacts of relay)

•Emergency Power Off control (EPO)

•Environmental parameter input interface

•User communication (for data setting and user background monitor)

•Liebert IntelliSlot® interface

•Modem interface

•Temperature detect interface

Figure 5 shows the relationship and connection between the monitoring (U2) board and other boards in the UPS.

Figure 5 Monitor board U2

DSP Control

Key & LED Board

Auxiliary Power

Monitor Board

Parallel Logic

Board

User Interface

Board

480V specifications

The Emerson 480V power systems play a critical role in modern industrial applications, providing reliable and efficient power distribution. These systems are designed for facilities that require robust performance and operational efficiency while adhering to safety regulations. With voltage ratings at 480V, they cater primarily to industries such as manufacturing, data centers, and commercial buildings.

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Energy efficiency is another characteristic that distinguishes Emerson 480V systems from traditional alternatives. With advanced power management features, these systems effectively reduce energy waste and lower electricity bills. Emerson’s commitment to sustainability is evident in its designs, which aim to minimize environmental impact through energy-efficient technologies.

The build quality of Emerson 480V systems is also noteworthy. They are designed to withstand harsh industrial environments and are constructed with high-grade materials that promote longevity and reliability. The modular design allows for easy maintenance and repair, which further extends the lifespan of the system.

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In summary, Emerson 480V power systems are a leading solution for industrial power distribution, characterized by their scalability, smart technology integration, energy efficiency, robust build quality, and user-friendly operation. These attributes make them a valuable investment for any organization aiming to improve its electrical management and operational performance.