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Emerson 250 installation manual Power Cable Connection Procedure, Top Cable Entry

Models: 250

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UPS Electrical Installation

The following are guidelines only and superseded by local regulations and codes of practice where applicable:

•Take special care when determining the size of the neutral cable (grounded conductor), because current circulating on the neutral cable may be greater than nominal current in the case of non- linear loads. Refer to the values in Table 6.

•The grounding conductor should be sized according to the fault rating, cable lengths, type of pro- tection, etc. The grounding cable connecting the UPS to the main ground system must follow the most direct route possible.

•Consideration should be given to the use of paralleled smaller cables for heavy currents, as this can ease installation considerably.

2.2.1Power Cable Connection Procedure

The rectifier input, bypass, output and battery power cables (all require lug type terminations) are connected to busbars situated in the I/O section as shown in Figures 7 through 9.

Equipment Ground

The equipment ground busbar is located in the I/O section as shown in Figure 7. The grounding con- ductor must be connected to the ground busbar and bonded to each cabinet in the system.

All cabinets and cabling should be grounded in accordance with local regulations.

NOTE

Proper grounding reduces problems in systems caused by electromagnetic interference.

! WARNING

Failure to follow adequate grounding procedures can result in electric shock hazard to personnel, or the risk of fire, should a ground fault occur.

All operations described in this section must be performed by properly trained and qualified electricians or technical personnel. If any difficulties are encountered, contact Liebert Services. See the back page of this manual for contact information.

The grounding and neutral bonding arrangement must be in accordance with local and national codes of practice.

Once the equipment has been positioned and secured, connect the power cables as described below (refer to the appropriate cable connection drawing in 4.0 - Installation Drawings):

1.Verify that the UPS equipment is isolated from its external power source and all the UPS power isolators are open. Check that these supplies are electrically isolated and post any necessary warning signs to prevent their inadvertent operation.

2.Open exterior and interior panels on the front of the I/O.

3.Connect the ground and any necessary main bonding jumper to the equipment ground busbar located in the I/O section.

4.Make power connections and tighten the connections to the proper torque according to one of the two procedures below, depending on the type of installation:

Ensure correct phase rotation.

•Top Cable Entry (see Figure 8)

•Bottom Cable Entry (see Figure 9)

Top Cable Entry

When making the power connections for top cable entry, the recommended order of pulling and installing cables is to start from the top connections to the bottom connections. The cables must be routed around the fault braces (see Detail in Figure 8). This is to prevent the cables from contacting other busbars. The recommended conduit layout is shown in Figure 7.

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Emerson 250 installation manual Power Cable Connection Procedure, Top Cable Entry
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250 specifications

Emerson 250 and 350 are cutting-edge products that represent a significant leap in automation technology and process control systems. Designed with a focus on versatility, reliability, and efficiency, these systems are tailored to meet the demands of various industries, including manufacturing, oil and gas, and chemical processing.

One of the standout features of the Emerson 250 and 350 is their advanced control algorithms. These algorithms enable precise control of processes, allowing for enhanced stability and improved operational efficiency. By optimizing real-time decision-making, the systems can adapt to variable operating conditions, thereby reducing downtime and enhancing productivity.

The Emerson 250 and 350 are equipped with intuitive user interfaces that streamline operation and monitoring. These interfaces provide operators with easy access to critical data and insights, facilitating informed decision-making. The systems’ graphical displays and touch-screen capabilities enhance user experience, making it easier to configure settings and respond to alerts promptly.

Moreover, both models are built with robust communication protocols, ensuring seamless integration with existing infrastructure. This adaptability enables businesses to leverage their current investments in technology while expanding their automation capabilities. The systems support various communication standards, including OPC, Ethernet/IP, and Modbus, ensuring they can connect effortlessly to other devices and databases.

Another key characteristic of the Emerson 250 and 350 is their scalability. Designed to grow alongside a business, these systems can be expanded or modified to accommodate increasing operational demands. This flexibility is critical in today's fast-paced industrial environment, where agility and responsiveness are paramount.

In terms of reliability, the Emerson 250 and 350 boast rugged designs that withstand the harsh conditions often present in industrial settings. With features like enhanced environmental resistance and fail-safe mechanisms, these systems ensure continuous operation and minimize the risk of failures, providing peace of mind for operators.

In summary, the Emerson 250 and 350 stand out with their advanced control algorithms, user-friendly interfaces, robust communication capabilities, scalability, and reliability. These characteristics make them ideal solutions for businesses aiming to improve automation and process control while adapting to the ever-evolving demands of the industrial sector.