ex protector
Member
- Location
- Gemany, Bühl
Hi colleagues and Ex specialists,
I'm an engineer and need to plan a purged cabinet for use I Class II Division 2 area.
The cabinet is pressurized with bebco system.
So my problem is the equipment in the cabinet, it can only start at a inside temperature of 32°F.
Because of the deep temperature I chose a cabinet heater from Hoffman with integrated adjustable thermostat.
Heater is not Ex, because I believe after cleaning and closing the cabinet I can use normal execution of a heater.
An additional mounted non Ex thermostat (Stego) e.g. adjusted to +41°F will switch power to the equipment on the backplane.
Hoffman told me maximum surface temperature of the heater is 140°C.
In my opinion this will work.
But in case of opening the door e.g. some dust will invade through the cooling slots of the heater.
Has this to be considered in Division 2?
I`m grateful for any comment.
.
Best regards
I'm an engineer and need to plan a purged cabinet for use I Class II Division 2 area.
The cabinet is pressurized with bebco system.
So my problem is the equipment in the cabinet, it can only start at a inside temperature of 32°F.
Because of the deep temperature I chose a cabinet heater from Hoffman with integrated adjustable thermostat.
Heater is not Ex, because I believe after cleaning and closing the cabinet I can use normal execution of a heater.
An additional mounted non Ex thermostat (Stego) e.g. adjusted to +41°F will switch power to the equipment on the backplane.
Hoffman told me maximum surface temperature of the heater is 140°C.
In my opinion this will work.
But in case of opening the door e.g. some dust will invade through the cooling slots of the heater.
Has this to be considered in Division 2?
I`m grateful for any comment.
.
Best regards