Series 7400 Single Phase 1+N UPS

Chapter 1

General Description

1.1 Introduction

The Uninterruptible Power Supply system is connected between a critical load, such as digital drives & automation, distributed digital Process Control System, telecom equipment, programmable logic controller, mission critical applications, computer, and its three phase mains power supply. Being designed to furnish a well regulated 1 PH output power supply under all rated load and input supply conditions the system offers the users the following advantages: -

Increased power quality :

The UPS has its own internal voltage and frequency regulator circuits which ensure that its output is maintained within close tolerances independent of voltage and frequency variations on the mains power lines.

Increased noise rejection :

By rectifying the input AC power to DC power, and then converting it back to AC, any electrical noise present on the input mains supply line is effectively isolated from the UPS output, therefore the critical load sees only clean power.

Power blackout protection:

If the mains power fails, the UPS continues to power the critical load from its battery source, leaving the load immune from power disturbances.

1.2 Design Concepts

1.2.1Redundant vs Non-Redundant configuration

The one-plus-onesystem comprises two standard 7400 series UPS modules which are modified to allow their outputs to be connected in parallel. These can then be used in a “redundant” or “non- redundant” configuration as explained below.

In a non-redundant module configuration, the system is sized such that both UPS modules are required to feed the potential load, and if one of the two modules develops a fault, or is for some reason shut down, the other module automatically shuts down also.

Note: In such an event the load is transferred to an unprocessed bypass supply - as described later.

In a redundant module configuration the system is sized such that the potential load can be provided by just one of the two modules. Under normal circumstances both modules are operational and share the load current equally; but if one module develops a fault, or is shut down, the second module is able to take over the full load demand and continue to provide it with processed, backed-up power. The advantages of a redundant system over a non- redundant system in terms of overall system reliability are self- evident.

Changing a one-plus-onesystem’s configuration between redundant and non-redundant is quite straightforward, being carried out by configuration links on the circuit board, which governs the modules’ parallel control operation.

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Emerson 7400 user manual Redundant vs Non-Redundant configuration, Introduction
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7400 specifications

The Emerson 7400 is a state-of-the-art control system designed for industrial applications, offering enhanced performance and reliability in process automation. This robust device is a part of Emerson's larger DeltaV system, known for its scalability and flexibility in various operational environments.

One of the main features of the Emerson 7400 is its advanced control capabilities, which enable precise management of complex industrial processes. The system is built to support a wide range of control strategies, including PID control, advanced control algorithms, and model predictive control, allowing for optimized performance tailored to specific operational requirements. This versatility makes it suitable for industries such as oil and gas, chemical processing, pharmaceuticals, and more.

The Emerson 7400 utilizes cutting-edge technologies to ensure seamless integration and communication with other components within a facility. Its open architecture supports a wide array of field devices, enhancing the interoperability of the entire control system. The integration of Ethernet-based communication protocols is another notable characteristic, facilitating high-speed data transfer and real-time monitoring, streamlining operations, and improving decision-making processes.

With a focus on safety and reliability, the Emerson 7400 is designed with built-in redundancy features. These include dual power supplies and network interfaces, ensuring continuous operation even in the event of component failure. This redundancy is crucial for industries where downtime could result in substantial financial losses or safety hazards.

The user interface of the Emerson 7400 is another highlight, combining intuitive design with powerful analytics capabilities. The system offers advanced visualization tools and customizable dashboards, providing operators with critical insights into process performance and enabling proactive management of potential issues.

Furthermore, the Emerson 7400 supports industry 4.0 initiatives through data analytics and cloud integration. This allows for predictive maintenance, improving equipment longevity and reducing operational costs. The system’s data collection and analysis capabilities empower organizations to leverage big data for enhanced productivity and efficiency.

In summary, the Emerson 7400 is a sophisticated control system that brings together advanced technologies, robust features, and a commitment to operational excellence. Its reliability, adaptability, and integration capabilities position it as a leading choice for industries seeking to enhance their automation processes while ensuring safety and efficiency.
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