Yokogawa ADMAG AXR Uživatelský manuál stáhnout pdf (Strana 190)

IM 01E30D01-01EN

NSTALLATION AND OPERATING PRECAUTIONS

FOR TIIS FLAMEPROOF EQUIPMENT

ApparatusCertiedUnderTechnicalCriteria

(IEC-compatible Standards)

1. General

The following describes precautions on electrical

apparatusofameproofconstruction(hereinafter

referredtoasameproofapparatus)inexplosion-

protected apparatus.

Following the Labour Safety and Health Laws

ofJapan,ameproofapparatusissubjectedto

type tests to meet either the technical criteria for

explosionproof electrical machinery and equipment

(standardsnoticationno.556fromtheJapanese

Ministry of Labour) (hereinafter referred to as

technical criteria), in conformity with the IEC

Standards, or the “Recommended Practice for

Explosion-Protected Electrical Installations in

General Industries,” published in 1979. These

certiedapparatuscanbeusedinhazardous

locationswhereexplosiveorinammablegasesor

vapours may be present.

Certiedapparatusincludesacerticationlabeland

anequipmentnameplatewiththespecications

necessary for explosion requirements as well as

precautionsonexplosionprotection.Pleaseconrm

these precautionary items and use them to meet

specicationrequirements.

For electrical wiring and maintenance servicing,

please refer to “Internal Wiring Rules” in the

Electrical Installation Technical Standards as well as

“USER’S GUIDELINES for Electrical Installations for

Explosive Gas Atmospheres in General Industry,”

published in 1994.

Tomeetameproofrequirements,equipmentthat

canbetermed“ameproof”must:

(1) BecertiedbyaJapanesepublicauthorityin

accordance with the Labour Safety and Health

LawsofJapanandhaveacerticationlabelin

an appropriate location on its case, and

(2) Beusedincompliancewiththespecications

markedonitscerticationlabel,equipment

nameplate and precautionary information

furnished.

2. Electrical Apparatus of

Flameproof Type of Explosion-

Protected Construction

Electricalapparatuswhichisofameproof

constructionissubjectedtoatypetestandcertied

by the Japanese Ministry of Labour aiming at

preventing explosion caused by electrical apparatus

inafactoryoranylocationwhereinammable

gasesorvapoursmaybepresent.Theameproof

construction is of completely enclosed type and

its enclosure shall endure explosive pressures in

cases where explosive gases or vapours entering

the enclosure cause explosion. In addition, the

enclosureconstructionshallbesuchthatame

caused by explosion does not ignite gases or

vapours outside the enclosure.

Inthismanual,theword"ameproof"isapplied

totheameproofequipmentcombinedwiththe

types of protection "e", "o", "i", and "d" as well as

ameproofequipment.

3. Terminology

(1) Enclosure

An outer shell of an electrical apparatus, which

ncloseslivepartsandthusisneededtocongure

explosion-protected construction.

(2) Shroud

A component part which is so designed that the

fastening of joint surfaces cannot be loosened

unless a special tool is used.

(

3) Enclosure internal volume

This is indicated by:— the total internal volume

ftheameproofenclosureminusthevolumeof

the internal components essential to equipment

functions.

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