Fan Specification; Environmental Installation Conditions; Derating Curve And Thermal Conditions; Calculating Flow Capacity Of The Fan - CD Automation REVO I 2PH User Manual

REVO I
2PH from 100A to 700A

6.4 Fan Specification

Size
S11 100A, 125A, 150A
S13 200A
S14 300A, 400A, 500A,
600A
S14 450A, 700A

6.5 Environmental installation conditions

Ambient temperature
Storage temperature
Installation place
Altitude
Humidity
Pollution Level

6.6 Derating Curve and Thermal conditions

The nominal current of the units in specification are referred
to continuous service at 40°C ambient temperature. For
higher temperature multiply the nominal current times
derating coefficient K here represented:

6.7 Calculating flow capacity of the fan

All the thyristor units when are in conduction produces
power loss that is dissipated inside cubicle in terms
of heating. Due to this fact the internal temperature
of cubicle is higher than ambient temperature. To be
cooled the thyristor need of fresh air cooling and to do it
is normally used a fan mounted on the front door or on
the roof of the cabinet.
Procedure to size Fan air mass flow (V): see power loss for
each thyristor and fuse mounted indicated in the manual
related to the current (Output feature and Internal fuse
Chapter).
V=f * Qv
Qv = total power losses (w) (thyristor + fuse power loss)
ta = ambient temperature (°C)
tc-ta
tc = cabinet temperature (°C)
V = fan air mass flow (m3/h)
f = altitude coefficient (see table on right)
The formulas used are for information only and is not a substitute for a proper thermal
rating done by a qualified person.
Number of fans
230Vac - Standard
One Fan - 16W
Two Fans - (16W x 2) 32W
Two Fans - (16W x 2) 32W
Four Fans - (16W x 4) 64W
0-40°C (32-104°F) at nominal current. Over 40°C (104°F) use the derating curve (max
50°C).
-25°C to 70°C -13°F to 158°F
Don't install at direct sun light, where there are conductive dust, corrosive gas,
vibration or water and also in salty environmental.
Up to 1000 meter over sea level. For higher altitude reduce the nominal current of
2% for each 100m over 1000m
From 5 to 95% without condense and ice
Up to 2nd Level ref. IEC 60947-1 6.1.3.2
Number of fans
115Vac - Option
One Fan - 14W
Two Fans - (14W x 2) 28W
Two Fans - (14W x 2) 28W
Four Fans - (14W x 4) 56W
l max = l nominal x K
1,2
1 1
1
0,8
0,6
0,4
0,2
0
15 20 25
For higher cabinet temperature (more than 50°C)
contact the producer of the unit
Operation at ambient operating temperature above 40°C
not covered by UL
®
18
User's manual
Number of fans
24Vdc - Option
One Fan - 7W
Two Fans - (7W x 2) 14W
Two Fans - (7W x 2) 14W
Four Fans - (7W x 4) 28W
Derating
1 1 1
0,9
30 35 40 45
CABINET TEMPERATURE °C
Altitude
0:100 meters f = 3.1 m3k/Wh
100:250 meters f = 3.2 m3k/Wh
250:500 meters f = 3.3 m3k/Wh
500:750 meters f = 3.4 m3k/Wh
0,8
50 55