Berthold LB 4700 - 8 Explosion Protection Design

Safety Manual / Explosion Protection Manual 8 Explosion Protection Design
56926BA26, Rev. 06, 04/2019
19
8 Explosion Protection Design
The electronics are located in compartment (item 1), which is enclosed by the hous-
ing and the base in the protection type "d" (Ex-d).
The cables are led into the connection compartment through the entries (Pos.3)
using approved cable glands, either in protection type "e" (Ex-e) or "i" (Ex-i). The
conductors are connected directly to approved feed through connectors of the pro-
tection type Ex-d.
1
2
3
4
Electronics compartment Ex-d
O-ring (silicone)
Entry
Housing cover
5
6
7
Equipotential bonding
Connection compartment Ex-e or Ex-i
Ignition gap
Fig
. 2 Explosion Protection Design LB 4700-xx-1x / LB 4700-xx-Ix
1
2
3
4
Electronics compartment Ex-d
O-ring (silicone)
Entry
Housing cover
5
6
7
Equipotential bonding
Connection compartment Ex-e or Ex-i
Ignition gap
Fig
. 3 Explosion Protection Design LB 4700-xx-Fx