Vertiv UL891 Installation and maintenance instructions

UL891 Switchboard
Installer/User Guide

Proprietary and Confidential ©2024 Vertiv Group Corp.
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Vertiv™ UL891 Switchboard Installer/User Guide

TABLE OF CONTENTS
1 Important Safety Instructions 1
2 Introduction 1
2.1 General Information 1
2.2 Product Overview 1
2.3 Design Features and Components 3
2.4 Typical Switchboard Layouts 4
2.5 Typical Customer Connections 5
2.6 Typical Ground Layout 8
2.7 Technical Information 10
2.8 Labels and Markings 10
3 Packaging and Handling 13
3.1 Receiving 13
3.2 Handling 13
3.2.1 Unloading from Truck 13
3.2.2 Unloading off Pallet 14
3.3 Storage 20
4 Installation 21
4.1 Pre-Installation Preparation 21
4.2 Anchoring 21
4.3 Considerations for Installation 23
4.4 Joining Sections 24
4.5 Transformer Close Coupled Connection 26
4.6 Electrical Connections 27
4.6.1 Fish Plates 27
4.6.2 Ground Bus Connection 35
4.6.3 Cable Connections 36
4.6.4 Busway 38
5 Energization 39
5.1 Pre-Energization 39
5.1.1 Pre-Energization Tests 39
6 Maintenance 41
6.1 Setting Up a Maintenance Schedule 41
6.2 Maintenance Inspections 41
7 Torque Table 43
8 Accessories 45
8.1 OHLD Installation 46
8.2 OHLD Operation 47
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Vertiv™ UL891 Switchboard Installer/User Guide

Appendices 49
Appendix A: Technical Support and Contacts 49
Appendix B: Submittal Drawings 50
ii Proprietary and Confidential ©2024 Vertiv Group Corp.
Vertiv™ UL891 Switchboard Installer/User Guide

1 Important Safety Instructions
All information provided in this instruction manual and additional referenced documentation should be reviewed and
acknowledged by all personnel responsible for the use of the equipment. All models represented in this manual are for
illustrative purposes only, due to the individual specifications associated with each customer. Vertiv will not assume
responsibility for actual use establish by the models.
Proper installation, operation, and maintenance are critical to the performance of the equipment.
Correct operating conditions in terms of input voltage, current and the fault capacities must be ensured at the time of
installing UL891 switchboard.
Refer ANSI C37.20.1 for abnormal operational conditions.
General instructions
•Read all the instructions included in this IUG before working with the equipment.
•Store and keep this IUG to ensure proper commissioning and maintenance to ensure the prolong use of the
equipment.
•Install the switchboard based on the design limitations as given in this IUG. The design limitations are presented
on the main nameplate and should never be installed in applications that exceed the limits presented by the
nameplate.
•Always follow standard safety protocols set forth by your company.
•Turn off all the power sources and de-energized the equipment before removing the covers and opening of
doors of the equipment. All components should be locked out and tagged in line with standard protocol and
ANSI Standard Z244.1 Control of Hazardous Energy – Lockout/Tagout.
•Wear PPEs while working on the switchboard.
•Only Veritv qualified personnel should work on the Switchboard.
•If additional information is needed, please contact your Vertiv representative.
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Vertiv™ UL891 Switchboard Installer/User Guide

2 Introduction
2.1 General Information
Vertiv™ UL891 Switchboard range offers a fully customizable solution that improves efficiency, saves space, and enhances
operator safety. The switchboard UL891 is engineered with influence from our proven IEC 60349-1 technology that has been
fully tested and certified to comply with UL891 standards. The Switchboard range also includes power distribution units and
remote power panels.
Features of UL891 Switchboard:
•Fully customized and design for flexibility.
•Type tested arc prevention busbar systems.
•Equipped with Type 1 gasket, and Type 3R enclosures.
•Switchboard ampacity to 6000A.
•Segregation available up to Form 4 type 7 for enhanced user safety and protection.
•Molded case circuit breaker (MCCB) UL489 and air circuit breaker (ACB) UL1066 large selection from main
breaker manufacturers.
•Integration of TVSS, PQM’s, Protective Relays and Controls based on site specific needs.
2.2 Product Overview
Compact
Vertiv manufactures one of the most compact switchboard designs in the North American market. UL891 Switchboard packs
more power into a smaller footprint, with our flexible modular design offering a standard shallow depth of 30.2 in. This
innovative design helps our customer to accommodate the demand for higher power capacity without losing valuable real
estate.
Safe and Reliable
Built and tested with IEC influence, the design of our UL891 Switchboard is focused on achieving the highest standard of
performance reliability and operator safety. Internal segregation as outlined by IEC 61439-2 reduces operator risk by limiting
the propagation of internal arc fault and preserves uptime during maintenance and upgrade operations.
Flexible
Vertiv modular switchboard design facilitates a component agnostic solution, giving the customer more freedom to choose
their preferred components from an extensive range of well known manufacturers. Designs can be customized to fit the most
challenging specifications and site specific needs, while maximizing space and performance.
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Vertiv™ UL891 Switchboard Installer/User Guide

Figure 2.1 Typical Switchboard
Figure 2.2 Typical Power Distribution Unit (PDU)
Figure 2.3 Typical Remote Power Panel (RPP)
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2.3 Design Features and Components
Typical switchboards are available with a variety of options. Below shows a typical arrangement with components and
features for a switchboard. PDUs and RPPs use the same typical layouts, but use different components to achieve their
designated goal, such as transformers and panelboards.
Figure 2.4 Rear Internal View
Figure 2.5 Front Internal View
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Vertiv™ UL891 Switchboard Installer/User Guide

Sr. No. Item Description
1 Cableway Compartment Designated for customer connections.
2 MCCB Compartment Housing unit for MCCB.
3 MCCB – UL489 fixed mount circuit breaker Equipment designed to break electrical circuit if tripped.
4 ACB – UL1066 draw out circuit breaker Equipment designed to provide protection for overcurrent and short circuits using air.
5 Neutral Busbar Voltage difference to each phase is approximately equal in magnitude and are equally
spaced in phase.
6 Main Busbar Carries the majority of the current.
7 Panel Flange Connection Connection point between switchboard and busway route in a facility.
8 Ground Busbar Ground network for the lineup with taps.
9 Instrument Compartment Designated as the metering and control section.
2.4 Typical Switchboard Layouts
Switchboards provide typical layouts for ACBs and MCCBs within the lineup. Typical layouts include front and rear access,
with single and double stack ACBs in individual sections. See Figure 2.6 below .
Standard MCCB columns with MCCBs stacked on top of each other in individual sections. See Figure 2.7 on the facing page .
MCCB’s use rotary handles for turning the breakers on and off. In a front access only switchboard, there is a cableway for field
termination.
Figure 2.6 Typical ACB Layout
Front Access - Single ACB Front Access -Double ACB Rear Access - Single ACB Rear Access - Double ACB
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Vertiv™ UL891 Switchboard Installer/User Guide