Emerson 250 External Protective Devices, Power Cables, UPS Electrical Installation, Dual Input

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UPS Electrical Installation

2.0UPS ELECTRICAL INSTALLATION

This chapter provides guidelines for qualified installers who must have knowledge of local wiring practices pertaining to the equipment to be installed.

! WARNING

Risk of electrical shock. Can cause injury or death.

The UPS contains high DC as well as AC voltages. Check for voltage with both AC and DC voltmeters before working within the UPS.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and glasses should be involved in installing the UPS or preparing the UPS for installation.

2.1External Protective Devices

For safety, it is necessary to install circuit breakers in the input AC supply and external battery sys- tem. Given that every installation has its own characteristics, this section provides guidelines for qualified installation personnel with knowledge of operating practices, regulatory standards and the equipment to be installed.

External overcurrent protection must be provided. See Table 6 - Liebert NXL UPS specifications for overload capacity.

Dual Input

When wiring the UPS with a separate rectifier and bypass input, each input must be protected sepa- rately. Size the breakers according to the input currents shown in Table 6.

2.2Power Cables

The UPS requires both power and control cabling. All control cables, whether shielded or not, should be run separate from the power cables in metal conduits or metal ducts which are electrically bonded to the metalwork of the cabinets to which they are connected

The cable design must comply with the voltages and currents in Table 6, follow local wiring practices and take into consideration the environmental conditions (temperature and physical support media), room temperature and conditions of installation of the cable and system’s overload capacity (see 5.0 - Specifications).

For cable entry terminal, refer to Figure 7.

! WARNING

Risk of electrical shock. Can cause injury or death.

Before cabling the UPS, ensure that you are aware of the location and operation of the external isolators that connect the UPS input/bypass supply to the power distribution panel.

Check that these supplies are electrically isolated, and post any necessary warning signs to prevent their inadvertent operation.

NOTICE

For dual input operation ensure that any busbars between the bypass and the rectifier input are removed.

When sizing battery cables, a maximum volt drop of 2VDC is permissible at the current ratings given in Table 7.

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Contents Liebert NXL Product Warranty Registration Contacting Liebert for SupportTable of Contents Figures Important Safety Instructions Page Preliminary Checks SINGLE-MODULE Mechanical InstallationIntroduction Environmental ConsiderationsPositioning System CompositionMaintenance Bypass Cabinet Cable EntryExternal Protective Devices Power CablesUPS Electrical Installation Dual InputPower Cable Connection Procedure Top Cable EntryControl Cable and Communications External Interface Board connections layoutControl Status Inputs Dry Contact Dry ContactsEPO Input Dry Contact Remote EPO inputControl Status Output Dry Contacts Switch Auxiliary Inputs Dry ContactsLoad Bus Synch Connection Communication and Monitoring Single-Module System OptionsOptional Equipment Installation Drawings Main components location, 250kVA Liebert NXL UPSTop View Doors Open Doors and Inner Skins Removed Outline drawing, 300kVA Liebert NXL UPS Front Front View Side View Front View Right Side View Front Doors Removed Front Detail a Battery & DC Parameters SpecificationsLiebert NXL UPS specifications 250 300 400 Input Parameters250 300 400 Physical Parameters and Standards, in mm Environmental ParametersCurrent ratings-rectifier input Current ratings-batteryLiebert NXL system and inverter efficiencies Current ratings-bypass inputRectifier Input BatteryRecommended conduit and cable sizes Bypass InputRecommended lug sizes Series Cable Size One Hole Two HoleTi n Ne tIti That
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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.
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