Publicité
Les langues disponibles
Les langues disponibles
Screw the cover on the box using the stainless steel bolts A4-70 minimum. Ensure that all the bolts are
screwed. After tightening the bolts, check with a shim of 15/100 mm all around the flam path that the
shim cannot penetrate the enclosure. Its non-penetration on full perimeter is the insurance of the
conformity of the product with the standards
It is also necessary to observe the regulations in the country of use.
11. Mounting and installation
Check if the data on the label of the enclosure are consistent with the permitted conditions for the
explosive atmosphere of use Group II (surface industries) Category 2 (high level of protection), G for
Gas, D for Dusts, IPxx rating (waterproofness for solids and liquids)
Before installing and commissioning, ensure that the flameproof enclosure Ex d:
o Is not damaged externally
o The surfaces of the lid which are in contact with the surfaces of the housing have no damage
o The threads of the housing for closing the lid are not damaged
Check if there is a specific position of mounting
The wiring of the cable conductors must be made with a particular care
The conductor insulation must reach the terminal. The conductive soul must not be damaged
Not to exceed the authorized maximal temperature, it is advisable to choose the appropriate cables
and take a particular care in installing them
Follow the instructions contained in the specifications
Installation of intrinsic safety elements:
The installation of the intrinsic safety circuits (IS) inside the enclosure is subordinated to the respect of
the requirements of their documents of certification, their certificates and with that after:
o Circuits IS are cabled with connection wires of which the thickness of insulator is ≥ 0,5 mm and the
section ≥0,5 mm ².
o The connection wires support a dielectric test of 500 V effective.
o The air gap between the active parts under voltage of the connection elements of the intrinsic safety
circuit compared to connection elements of an non intrinsic safety circuit is higher or equal to 50
millimeters
o The air gap and creepage distances in the air between the active parts under voltage of the intrinsic
safety circuit compared to an intrinsic safety circuit close are higher or equal to 6 millimeters
o The air gap and creepage distances in the air between the active parts under voltage of the intrinsic
safety circuit compared to the metal parts which can be with the ground are higher or equal to 3
millimeters.
o The active parts of the intrinsic safety circuits support a dielectric test of rigidity under an effective
alternating voltage of 500 Volts compared to the metal mass
o The active parts of an intrinsic safety circuit support a dielectric test of rigidity under an effective
alternating voltage of 500 Volts compared to an intrinsic safety circuit close.
o Circuits NIS are cabled with conductive wires whose insulation is such as they can support a
dielectric test of 2 U + 1000 V effective, U being the sum of the tensions of the IS and NIS circuits,
with a minimum of 1500 V
o
The sketch below shows the requirements of intrinsically safe devices
1. Isolating IS and Non-IS circuits
Cable core
IS
Non-IS
2 cable ducts
Metallic screen earthed
IS
Non-IS
1 duct and metallic screen
DE8143A12-07 01/12/2016
Insulating wall
IS
Non-IS
Duct with insulating wall
≥ 8 mm
Flanging
IS
Non-IS
Duct with cables flanging
Operating instructions
Flameproof enclosure - DE8BA/XB8BA series
2. Clearance and creepage distances between IS and Noni-IS
devices
≥ 3 mm
≥ 3 mm
ENG
13/16
Publicité
