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3.
INSTALLATION IN AN ExPLOSION HAzARD AREA
3.1
General
The EE300Ex has been certified in accordance with the ATEX 94/9EC Directive, IECEX
Scheme, , National Electrical Code (ANSI-NFPA 70 (NEC
Canadian Electrical Code (CSA C22.1).
Devices in explosion-hazard areas are only permitted for operation in atmospheric conditions
-20 °C
0.8 bar
In air normally 21 % (V/V)
If suitable measures have been carried out in accordance with EN1127-1, the EE300Ex is also
permitted for operation outside atmospheric conditions in line with the manufacturer's instruc-
tions.
When conducting measurements in explosion-hazard areas, the EE300Ex must always be con-
nected via intrinsically safe power supply devices or protective barriers.
Even if only the measurement probe is installed in the explosion hazard area, the EE300Ex
must be supplied using intrinsically safe equipment.
Rules for the interconnection of intrinsically safe electrical circuits in accordance with EN60079-14,
EN60079-25 and IEC60079-14, IEC60079-25 (proof of intrinsic safety in the system description)
and national requirements should be followed. For the U.S., Canada see Controll Drawing
M1_1309080 and ANSI/ISA RP12.6.01, NEC and CEC.
If a risk analysis of the installation in line with EN1127-1 reveals a risk of lightning strike, an
overvoltage protection device should be installed in the intrinsically safe circuits.
Requirements for the installation of overvoltage protective devices can be found in the standard
EN60079-25. For the U.S., Canada see ANSI/ISA RP12.6.01, NEC and CEC.
Example of an overvoltage protection device
Manufacturer: Dehn
Type:
to protect intrinsically safe
measurement circuits for 2DA
C2 nominal discharge surge current:
Nominal voltage:
max. permiss. input voltage:
max. permiss. input current:
Alu housing, grey, protection rating:
ATEx Approval:
II 2 (1) G Ex ia IIC T4, T5, T6
II 2 G Ex ib IIC T4, T5, T6
Follow the installation instructions from DEHN!
Each EE300Ex is provided with its production date. The production date is shown on the label
(after the series) as follows:
wwYYYY
ww
YYYY
≤ T ≤ 40 °C
(-4°F)
≤ p ≤ 1.1 bar
(12 psi)
ITAK ExI BxT 24
week of the year of construction
year of construction
) and
©
(104 °F)
(16 psi)
(8/20) 20 kA
30 V DC
33 V DC
0.5 A
IP 65
12
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