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Quatech INTERBUS S Ex-1.4.3 Temperature classes, Application in Explosive Environments, Maximum

Models: INTERBUS S

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Ex-1.4.3 Temperature classes

Application in Explosive Environments

• 7

Classifications meeting the NEC 500

 

 

 

Ex-1.4.3 Temperature classes

Electrical components for explosive areas are differentiated by temperature classes:

Temperature classes

Maximum

Ignition temperature

 

surface temperature

of the combustible materials

T1

450 °C

> 450 °C

 

 

 

T2

300 °C

> 300 °C ≤ 450 °C

 

 

 

T2A

280 °C

> 280 °C ≤ 300 °C

 

 

 

T2B

260 °C

> 260 °C ≤ 280 °C

 

 

 

T2C

230 °C

>230 °C ≤ 260 °C

 

 

 

T2D

215 °C

>215 °C ≤ 230 °C

 

 

 

T3

200 °C

>200 °C ≤ 215 °C

 

 

 

T3A

180 °C

>180 °C ≤ 200 °C

 

 

 

T3B

165 °C

>165 °C ≤ 180 °C

 

 

 

T3C

160 °C

>160 °C ≤ 165 °C

 

 

 

T4

135 °C

>135 °C ≤ 160 °C

 

 

 

T4A

120 °C

>120 °C ≤ 135 °C

 

 

 

T5

100 °C

>100 °C ≤ 120 °C

 

 

 

T6

85 °C

> 85 °C ≤ 100 °C

 

 

 

WAGO-I/O-SYSTEM 750 Modular I/O-System

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Page 155
Image 155
Quatech INTERBUS S Ex-1.4.3 Temperature classes, Application in Explosive Environments, Classifications meeting the NEC
Page 154 Page 156