30 deg c vs 40 deg c
30 deg c vs 40 deg c
(OP)
Question for cooling electrcial rooms - if condcutors are tested at 30 deg c ambient but equipment terminations are tested at 40 deg ambient - what do you tell the mechanical engineer to keep the room temperature at?
Thanks.
Thanks.






RE: 30 deg c vs 40 deg c
The proper temperature to ensure that any ambient derating factors do not cause any ratings to be exceeded. A 10 deg increase in ambient can possibly lead to derating cable ampacity to 80% or so.
RE: 30 deg c vs 40 deg c
RE: 30 deg c vs 40 deg c
RE: 30 deg c vs 40 deg c
DESTINATION MAX.TEMP. MIN.TEMP. RH% MAX.TEMP. MIN.TEMP. RH%
CONTROL ROOM 25 20 60 35 10 40
RELAY ROOM 25 20 60 35 10 40
Low Voltage Switchgear 35 10 60 40 10 40
Medium V.Switchgr. 35 10 60 40 10 40
CABLE ROOM 35 10 60 40 10 40
But you have to get the electrical losses for each room including lighting and crew[appr.150 w/man].