explosion protectionintrinsic safety, simple electrical equipment conditions in ex areas ex marking...

UL/FM

ATEX/IEC TÜV 10 ATEX 2539 X

Group II

4 II (3)G

Conditions in Hazardous Areas (ATEX 94/9/EG)

Class I Zone 1 AEx ib IIB T 4

[Ex ia] IIB T4

Class I Division 2 Group A, B, C, D T 4A

1 0044

Conditions

Marking

Equipment can be used without restriction

–

Observe special operating conditions

X

Ex component with part certificate cannot be used alone; CE conformity is only certified after installation in complete equipment

U

Associa-ted equip-ment [ ]

Use outside hazardous area, effective in Ex area

EN 60079-0 (2006)

[Ex ib] IIB

EN 60079-0 (starting from Edition 5.0)

[Ex ib Ga] IIB

Equip-ment

Use within hazardous area

EN 60079-0 (2006)

Ex ib IIB T4

EN 60079-0 (starting from Edition 5.0)

Ex ib IIB T4 Ga

Flamma-ble sub-stances

Class Division Group Zone Temporary behavior of the flammable sub-stance in Ex area

Gases, vapors, liquids

Class I 1 A, B, C, D 0 or 1 Permanently, for long periods, frequently Occasionally

2 A, B, C, D 2 Normally not, only for a short period

Dust Class II 1 E, F, G 20 or 21 Permanently, for long periods, frequently Occasionally

2 E, F 22 Normally not, only for a short period

Fibers Class III 1 – 20 or 21 Constantly

Occasionally

2 – 22 Normally not, only for a short period

Gas ignition temperatures

Ammonia 630°C

Methane 595°C

Hydrogen 560°C

Propane 470°C

Ethylene 425°C

Butane 365°C

Acetylene 305°C

Cyclohexane 259°C

Diethyl ether 170°C

Carbon disulfide 95°C

Gas Ignition Temperatures

Ammonia 630°C

Methane 595°C

Hydrogen 560°C

Propane 470°C

Ethylene 425°C

Butane 365°C

Acetylene 305°C

Cyclohexane 259°C

Diethyl ether 170°C

Carbon disulfide 95°C

Year “ATmosphère EXplosible” EC directive

Approval number

Group A: Acetylene, B: Hydrogen, C: Ethylene, D: Propane Group E: Metal dust, F: Coal dust, G: Grain dust

Gas Conditions Group I

Methane Mines susceptible to firedamp (coal mining)

150°C With deposits of coal dust on the operating equipment

450°C Without deposits of coal dust on the operating equipment

Ex mark per Directive 94/9/EG (ATEX)

Associa-ted equip-ment [ ]

Use outside hazardous area, effective in Ex area

ANSI/ISA 60079-0 [AEx ib] IIB

Equip-ment

Use within hazardous area

ANSI/ISA 60079-0 AEx ib IIB T6

Flammable substances

Temporary behavior of the flammable substance in Ex areas

Classification of the hazardous area

Gases, vapors, liquids

Permanently, for long periods, frequently

Zone 0

Occasionally Zone 1

Normally not, only for a short period

Zone 2

Passive Components Energy Storing Devices Energy Sources*

Pt100 Capacitor Thermocouple

Switch Coil Photo cells

Distribution boxes

* Requirements U 1 1.5 V; I 1 100 mA; P 1 25 mW

Resistors Values must be exactly defined and considered when determining overall system safety

Flammable substances

Temporary behavior of flammable substances

Classification of ha-zardous areas

Required marking for equipment to be used per CENELEC

IEC 600079-0 (starting from Edition 5.0)

Device Group Category Equipm. Protect. Level (EPL)

Gases, vapors, liquids

Permanently, for long periods, frequently

Zone 0 II 1G, (1)G Ga, [Ga]

Occasionally Zone 1 II 2G, (2)G Gb, [Gb]

Normally not, only for a short period

Zone 2 II 3G, (3)G Gc, [Gc]

Dust Permanently, for long periods, frequently

Zone 20 II III (IEC 60079-0, starting from Edition 5.0)

1D, (1)D Da, [Da]

Occasionally Zone 21 II III (IEC 60079-0, starting from Edition 5.0)

2D, (2)D Db, [Db]

Normally not, only for a short period

Zone 22 II III (IEC 60079-0, starting from Edition 5.0)

3D, (3)D Dc, [Dc]

Methane, coal dust

Constantly Coal mining I M1 Ma

Methane, coal dust

Frequently Coal mining I M2 Mb

CENELEC Marking

Typical Gas

Ignition Energy/µJ

I II A II B II C

Methane Propane Ethylene Hydrogen

280> 180 60 ... 180 > 40

CENELEC Marking

Typical Gas

Ignition Energy/µJ

I II A II B II C

Methane Propane Ethylene Hydrogen

280> 180 60 ... 180 > 40

IEC 60079-0 (starting from Edition 5.0) CENELEC Marking

Typical dusts

III A III B III C

Flammable lint Non-conducting dust Conducting dust

US marking

Protection type for electrical equipment in gas explosive hazardous areas

Protection principle Zone Standard Class/Zone Application

EN IEC UL

o Oil encapsulation Exclusion of the Ex atmosphere 1 or 2 EN 60079-6 IEC 60079-6 UL 60079-6

Class I, Zone 1

Transformers, starting resistors, switching devices

q Sand encapsulation Spark prevention 1 or 2 EN 60079-5 IEC 60079-5 UL 60079-5 Transformers, relays, safety fuses, switches

ma mb Molded encapsulation Exclusion of the Ex atmosphere 0, 1, 2

1, 2 EN 60079-18 IEC 60079-18 UL 60079-18 Relays, sensors, solenoid valves

px py pz

Pressure encapsulation Exclusion of the Ex atmosphere 0, 1, 2 1, 2 2

EN 60079-2 IEC 60079-2 ISA 60079-2 Class I, Div. 1/2 Switch and control cabinets

d Pressure-tight encapsulation Propagation prevention 1 or 2 EN 60079-1 IEC 60079-1 UL 60079-1 Switch and command systems, heating equipment, lights

e Increased safety Spark prevention 1 or 2 EN 60079-7 IEC 60079-7 UL 60079-7 Class I, Zone 1 Junction and connection boxes, housings, terminal blocks

ia ib ic

Intrinsic safety Ignition energy limitation

0, 1, 2 1, 2 2

EN 60079-11 IEC 60079-11 UL 60079-11 Class I, Div. 1 Measuring and control technology, sensors, actuators

EN 60079-25 IEC 60079-25 UL 60079-25 Intrinsically safe systems

EN 60079-27 IEC 60079-27 UL 60079-27 Intrinsically safe fieldbus systems (FISCO)

nA Non-sparking equipment Comparable with Ex e 2

EN 60079-15 IEC 60079-15 UL 60079-15 Class I, Zone 2 Approved for Zone 2 nC Sparking equipment Comparable with Ex d 2

nR Vapor-proof equipment Protection by housing 2

op is op pr op sh

Optical radiation Intrinsically safe Protected Locked

123

EN 60079-28 IEC 60079-28 UL 60079-28 Optoelectronic devices

Protection type for electrical equipment in areas with flammable dust Protection principle

Zone Standard Class/Zone Application

EN IEC UL

tD Protection by housing Exclusion of the Ex atmosphere 21 or 22 EN 61241-1 IEC 61241-1 Class II, Div. 1 Junction and connection boxes, switching devices and switchgear units, lights

iaD, ibD Intrinsic safety Energy limitation of sparks and temperatures 20, 21 or 22 EN 61241-11 IEC 61241-11 UL 913 Class II, Div. 1 Measuring and control technology, sensors,

actuators

pD Pressure encapsulation Exclusion of the Ex atmosphere 21 or 22 EN 61241-4 IEC 61241-4 NFPA 496 Class II, Div. 1/2 Switch and control cabinets, motors

maD, mbD Molded encapsulation Exclusion of the Ex atmosphere 20, 21 or 22 EN 61241-18 IEC 61241-18 Command, signaling and display devices, sensors

Protection Type

Category

1G Use in a defined area

(1)G Use outside hazardous area, effective up to the described area

Gas Conditions Group I

Methane Mines susceptible to firedamp (coal mining)

150°C With deposits of coal dust on the operating equipment

450°C Without deposits of coal dust on the operating equipment

ID No. Notified Body/Official Testing Agency (Examples)

Country

0044 TÜV Nord Germany 0102 PTB Germany 0158 EXAM Germany 0637 IBExU Germany 0080 INERIS France 0081 LCIE France 0344 KEMA Netherlands 0402 SP Sweden 0163 LOM Spain 0600 EECS (BASEEFA) UK 0518 SCS UK

www.wago.com Please find additional information at

Ex Marking acc. to Standard (Example)

Dust Group

Gas Group / Ignition Energy Permissible Surface Temperature per IEC 505

Protection Type

Intrinsic Safety, Simple Electrical Equipment

Conditions in Ex Areas Ex Marking acc. to Standard

Gas Group / Ignition Energy

Conditions in Hazardous Areas, USA Permissible Surface Temperature per IEC 505 / NEC 500

Protection Type

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UL/FM

Group II

ATEX/IEC

Explosion Protection – Real Progress in Safety

Class/Zone Categorization Class/Division Categorization

EC Type Examination Certificate Additional Conditions

T 1 = 450°C

T 2 = 300°C

T 3 = 200°C

T 4 = 135°C

T 5 = 100°C T 6 = 85°C

T 1 = 450°C

T 2 = 300°C

T 3 = 200°C

T 4 = 135°C

T 5 = 100°C T 6 = 85°C

T2A = 280°C T2B = 260°C T2C = 230°C T2D = 215°C T3A = 180°C T3B = 165°C

T4A = 120°C T3C = 160°C