Caution, Notice – GE Industrial Solutions Arc Vault Protection System User Manual

Page 23

DEH-41483 Rev. 3

Arc Vault™ Protection System

Equipment

Installation

SECTION 4. EQUIPMENT INSTALLATION

GENERAL

This chapter contains complete instructions for installing

General Electric Arc Vault Low-voltage equipment.

CAUTION

Personnel installing this equipment must be familiar

with this instruction manual and all articles of the

National Electrical Code applicable to the installation

of this switchgear. In addition, all drawings, both

mechanical installation and electrical, must be

understood and strictly followed to prevent damage

to the switchgear or equipment being protected by

the switchgear.

NOTICE

Before installation work is started, it is important to

review all of the drawings provided, including the

General Electric equipment arrangement drawings,

site installation drawings, elementary and remote

connection drawings, mechanical connection

drawings, and the summary of equipment list.

All expendable hardware for shipping purposes only,

is painted yellow or tagged with yellow adhesive tape

and may be discarded at completion of the

installation phase.

Site Location

In general, the location of the switchgear equipment will

have been predetermined during the specification and/or

procurement of equipment phases. Indoor locations within

buildings impose certain requirements which must be met

so that the switchgear may operate efficiently with a

minimum of maintenance.

In locating the Arc Vault equipment, adequate aisle space

must be provided at the front and rear of the equipment to

ensure proper ventilation of and to allow service and

maintenance with the front and rear doors open. The

recommended aisle space is shown on the floor plan

supplied with the equipment drawings.

The switchgear equipment should be placed in an area

where clean, dry air is free to circulate around and above it.

Since air is taken into the equipment at the bottom of each

section and exhausted at the top, a location with good

airflow must be provided for efficient operation. A minimum

of 30 inches of clear space above the equipment is

recommended.

Foundation Requirements

For optimum performance of your General Electric

switchgear equipment, the foundation requirements

expressed in this chapter should be strictly adhered to.

NOTICE

The foundation for the outdoor switchgear must

provide proper drainage of ground and surface water

accumulations away from the equipment.

The foundation must be strong enough to prevent

sagging due to the weight of the switchgear structure

and to withstand the shock stress caused by the

opening of the breakers under fault conditions. The

shock loading is approximately 1.5 times the static

load.

The foundation must be flat and level in all planes. Refer to

Figure 4-1 for definition of flat and level.

Figure 4-1 Definition of flat and level

Foundation Preparation

Refer to Figure 4-2 along with the owner's foundation

construction drawings, and the General Electric

supplemental installation drawings. Although the indoor

switchgear equipment can be mounted directly on a

smooth, level floor, it is recommended that recessed steel

channels be installed for supporting the equipment. Anchor

bolts and channels are to be provided by the purchaser.

NOTICE

When the equipment is installed on a surface subject

to impact (shock) loads due to operating conditions or

environmental seismic (earthquake) conditions, the

anchor bolts should be fabricated of medium carbon

steel (grade 5 load rating).

The floor channels under the front and rear switchgear

anchor points (see Figure 4-2) should be embedded in a

level concrete slab with their top surfaces flush with the

finished floor. It is essential that these steel channels be

level and aligned with each other prior to final anchoring, to

062"

Plumb line

Plane#1

Plane#2

Surface of pad

Perpendicular

on both axes

to within 0.25"

over 10' span