ABB 266 HART Series, Руководство по эксплуатации

Страница: 69 / 80

2600T Series Pressure transmitters | OI/266/HART-EN Rev. D 69
According to ATEX Directive (European Directive 94/9/EC of 23 March 1994) and relative Standards which can assure compliance
with Essential Safety Requirements, i.e., EN 60079-0 (General requirements) EN 60079-15 (Specification for electrical apparatus
with type of protection “n”) EN 61241-0 (General requirements), 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.
d)
Certificate ATEX II 3 G Ex nL IIC T4/T5/T6 (for T4 = -50°C ≤ Ta ≤+85°C), (for T5 and T6 = -50°C ≤ Ta ≤+40°C) and II 3D Ex tD
A22 IP67 T85°C. FM Approvals Certificate number FM09ATEX0025X (Lenno products) and FM09ATEX0070X (Minden products)
Important
It is the technical support for the ABB Declaration of Conformity
The meaning of ATEX code is as follows:
II : Group for surface areas (not mines)
3 : Category
G : Gas (dangerous media)
D : Dust (dangerous media)
+40°C for Dust (not Gas) with a dust layer up to 50 mm depth.
T85°C: As before for Dust for a Ta +40°C
The other marking refers to the protection type used according to the standards:
Ex nL: Type of protection “n” with “energy limitation” technique
IIC: Gas group
T4: Temperature class of the transmitter (which corresponds to 135°C max) with a Ta from -50°C to +85°C
T5: Temperature class of the transmitter (which corresponds to 100°C max) with a Ta from -50°C to +40°C
T6: Temperature class of the transmitter (which corresponds to 85°C max) with a Ta from -50°C to +40°C
About the applications, this transmitter can be used in “Zone 2” (Gas) and “Zone 22” (Dust) classified areas (unlikely/infrequent
hazard) as it is shown on the following sketch:
Important
When installed this transmitter must be supplied by a voltage
limiting device which will prevent the rated voltage of 42 V d.c.
being exceeded.
Application with Gas Application with Dust
Zone 2
266 Tx Category 3G Ex nL
Note: the transmitter must be
connected to a supply with 42V
d.c. max output voltage as above
indicated. The Ii of the transmitter
is less than 25 mA.
Zone 22
266 Tx Category 3D IP6x
(Ex nL)
Note: the protection is mainly
assured by the “IP” degree
associated to the low power from
supply.
Application for pressure transmitter Ex nL categories 3G and 3D
Important - Note for pressure transmitter with combined approval
Before installation of the Transmitter, the customer should permanent mark his chosen Protection Concept on the safety label. The transmitter can only
be used with according to this Protection Concept for the whole life. If two or more types of protection box (on safety label) are permanent marked, the
pressure transmitter must be removed from hazardous classified locations. The selected Type of Protection is allowed to be changed only by
manufacturer after a new satisfactory assessment.