Hazardous Area Considerations - ABB 2600T-Serie Bedienungsanleitung

7 Hazardous Area considerations

7.1 Ex Safety aspects and IP Protection (Europe)
According to ATEX Directive (European Directive 94/9/EC of 23
March 1994) and relative European Standards which can
assure compliance with Essential Safety Requirements, i.e.,
EN 60079-0 (General requirements) EN 60079-1 (Flameproof
enclosures "d") EN 60079-11 (Equipment protection by intrinsic
safety "i") EN 60079-26 (Equipment with equipment protection
level -EPL- Ga) EN 61241-0 (General requirements)
EN 61241-1 (Protection by enclosures "tD") EN 61241-11
(Protection by intrinsic safety"iD") the pressure transmitters of
the 2600T SERIES have been certified for the following group,
categories, media of dangerous atmosphere, temperature
classes, types of protection.
Examples of application are also shown below by simple
sketches.
a) Certificate ATEX II 1 G Ex ia IIC T4/T5/T6 and II 1 D Ex iaD
20 T85°C
FM Approvals certificate number
FM09ATEX0024X (Lenno products)
FM09ATEX0069X (Minden products)
FM11ATEX0035X (Faridabad products)
The meaning of ATEX code is as follows:
— II : Group for surface areas (not mines)
— 1 : Category
— G : Gas (dangerous media)
— D: Dust (dangerous media)
— T85°C: Maximum surface temperature of the transmitter
enclosure with a Ta (ambient temperature) +40°C for Dust
(not Gas) with a dust layer up to 50 mm depth.
Application for pressure transmitter Ex ia categories 1G and 1D
Application with Gas
Note: the transmitter must be connected to a supply
(associated apparatus) certified [Ex ia]
Zone 0
266 Tx Category 1G Ex ia
Important. The number close to the CE marking of the transmitter
safety label identifies the Notified Body which has responsibility for
the surveillance of the production.
The other marking refers to the protection type used according
to relevant EN standards:
— Ex ia: Intrinsic safety, protection level "a"
— IIC: Gas group
— T4: Temperature class of the transmitter
(corresponding to 135°C max) with a Ta from -50°C to +85°C
— T5: Temperature class of the transmitter
(corresponding to 100°C max) with a Ta from -50°C to +40°C
— T6: Temperature class of the transmitter
(corresponding to 85°C max) with a Ta from -50°C to +40°C
About the applications, this transmitter can be used in "Zone 0"
(Gas) and "Zone 20" (Dust) classified areas (continuous hazard)
as it is shown on the following sketches.
Application with Dust
Note: the protection is mainly assured by the "IP" degree
associated to the low power from supply. This can either be [ia]
or [ib] certified [Ex ia]
2600T Series Pressure transmitters | SOI/266-XC Rev. D 17
7 Hazardous area considerations
Zone 20
266 Tx Category 1D
IP6x (Ex ia)