12 Hazardous Area Considerations; Ex Safety Aspects And Ip Protection (Europe) - ABB JDF300 Operating Instruction

46 J D F 3 0 0 | F I E L D I N D I C ATO R | O I/ J D F 3 0 0 - E N R E V. B

12 Hazardous Area considerations

Ex Safety aspects and IP Protection (Europe)

According to ATEX Directive (European Directive 2014/34/EU of
26 February 2014) 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) the JDF300 field indicator has 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.
IMPORTANT
The number close to the CE marking of the field indicator
safety label identifies the Notified Body which has
responsibility for the surveillance of the production.
a) II 1 G Ex ia IIC T6...T4 Ga, II 1 D Ex ia IIIC T85 °C Da; IP66, IP67.
FM Approvals certificate number FM 18 ATEX 0055X.
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)
Application for field indicator Ex ia categories Ga and Da
Application with Gas
Zone 0
JDF300
Category 1 G Ex ia
Note: the field indicator must
be connected to a supply
(associated apparatus)
certified [Ex ia]
The other marking part refers to the protection type used
according to relevant EN standards and is valid also for IECEx
as detailed in FM Approvals certificate number IECEx FME
18.0004X:
• Ex ia: Intrinsic safety
• IIC: Gas group
• T4: Temperature class of the field indicator (corresponding to
135°C max) with a Ta from -50°C to +85°C
• T5: Temperature class of the field indicator (corresponding to
100°C max) with a Ta from -50°C to +40°C
• T6: Temperature class of the field indicator (corresponding to
85°C max) with a Ta from -50°C to +40°C
• Ga: Equipment Protection Level
• IIIC: for Dust application
• Da: Equipment Protection Level
About the applications, this field indicator can be used in "Zone
0" (Gas) or "Zone 20" (Dust) classified areas (continuous
hazard) as it is shown on the following sketches.
Important. This ATEX Category depends on the application
(see below) and also on the intrinsic safety level of the
field indicator supply (associated apparatus) which can
sometimes suitably be [ib] instead of [ia]. As it is well known,
the level of an intrinsic safety system is determined by the
lowest level of the various apparatus used, i.e., in the case of
[ib] supply, the system takes over this level of protection.
Application with Dust
Zone 20
JDF300
Category 1 D Ex ia; IP6x
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]