Control of Humidity in Bus Duct 2

[DANSES]

Refer with IEEE C37.23 section 7.6, Seal or Frame will be installed to separate section inside outside building. The bus duct having sections located inside and outside a building, so that ambient temperature may be appreciably different at the same moment. Sealing or baffles shall prevent an interchange of air between the sections. Installation of the sealing shall be maintain the bus duct to be capable of operating partly indoors and partly outdoors under climatic conditions.
We will be applicated this system for the Bus Duct - ventilated.
Question: How to control humidity between inside and outside refer to our past experience some of moisture / condensed vapor collecting in seal or frame??

Another type of installation, we want to install busduct- non ventilated- dry air pressure...and then we dont install a vapour barrier because there is no ventilated at enclosure of bus duct. But, how to equalising the temperature between aoutside and inside?? The enclosure outside will be under UV and possibility will be higher temperature than inside because air conditioning room. Is it common installation?? We inject dry air pressure to avoid corrosion?? Can any body share the related experience?? Many Thanks

 

[7anoter4]

The buses shall have adequate filtered breathers that shall prevent dust
moisture and insects entry into the bus enclosure
Provisions shall be made to ensure drainage of any condensation that may
collect in the bus enclosure. Filter drains shall be provided at the terminations to
equipment and in all the low points in the horizontal sections of the enclosure.
The bus ducts shall be provided with anti-condensation heaters
The heaters shall be mounted inside of the enclosure
Thermostat with electrical contacts [for instance 230 V AC] shall be mounted on the bus enclosure.
See- for instance- Delta_Unibus system[or other]:

http://www.powellind.com/main/Uploadpdf/Delta_Bus_Systems.pdf

 

[waross]

Thermostat with electrical contacts [for instance 230 V AC] shall be mounted on the bus enclosure.

Given that the formation of condensation has more to do with temperature differences and temperature increases with time, be cautious with thermostat settings. A safe setting is above the highest expected ambient temperature so that the heaters are on at all times except when the bus is carrying sufficient current to maintain the temperature above the ambient temperature.

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[DANSES]

Zanoter & Waros,

I try to make summary if your answer is Heater.
For the first type of installation (non dry air pressure injected) we will plan to install heater.
However, for the other type where bus duct will be injected by dry air pressure, we dont want to install heater. Any concern?? Any comment??