EN
14170746.05 03/2022 EN/DE/FR/ES
WIKA additional information model TR21 (Ex i)
13
3.6 Mounting examples
■
Model TR21-A
■
Model TR21-B
associated electrical
equipment
Intrinsically safe
supply or suitable
barrier
fully in z
one 0 or 20, marking 1G or 1D
fully in z
one 1 or 21, marking 2G or 2D
Zone 0 Zone 20
Zone 1, marking 1/2G Zone 21, marking 1/2D
Separ
ation of Ex z
ones
14103747.01
Intrinsically safe
supply or suitable
barrier
Non-hazardous
area
Hazardous area
Hazardous area
Non-hazardous
area
Hazardous area
associated electrical
equipment
Intrinsically safe
supply or suitable
barrier
fully in z
one 0 or 20, marking 1G or 1D
fully in z
one 1 or 21, marking 2G or 2D
Zone 0 Zone 20
Zone 1, marking 1/2G Zone 21, marking 1/2D
Separ
ation of Ex z
ones
14103747.01
Intrinsically safe
supply or suitable
barrier
Non-hazardous
area
Hazardous area
Hazardous area
Non-hazardous
area
Hazardous area
3. Commissioning, operation
Summary of Contents for TR21-A
Page 20: ...EN 14170746 05 03 2022 EN DE FR ES WIKA additional information model TR21 Ex i 20...
Page 38: ...DE WIKA Zusatzinformation Typ TR21 Ex i 38 14170746 05 03 2022 EN DE FR ES...
Page 56: ...FR 14170746 05 03 2022 EN DE FR ES Informations suppl mentaires WIKA type TR21 Ex i 56...
Page 74: ...14170746 05 03 2022 EN DE FR ES WIKA additional information model TR21 Ex i 74...
Page 75: ...14170746 05 03 2022 EN DE FR ES WIKA additional information model TR21 Ex i 75...