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Technical details
Figure 5 – type key for designating Ex fans
RP
60 - 30 / 28 - 4
Description and designation of fans
Figures 5, 6 and Table 3 contain data on important fan di-
mensions, Table 4 contains basic parameters and nominal
values of RP Ex fans.
Table 2
RP 40-20/20-4D Ex
1 –
Power supply
Y
2 –
Max. electric input
P
3 –
Max. current (5c)
I
4 –
Mean speed
n
5 –
Capacitor
C
6 –
Max. working temp.
t
7 –
Air flow max.
V
∆ p
8 –
Total pressure max.
∆ p
9 –
Static pressure min. (5c)
10 –
Weight
m
11 –
Five-stage controller
type
12 –
Protecting relay
type
3× 400 V
50 Hz
281
[W]
max
0.50
[A]
max
[min
-1
]
1400
[µF]
–
[°C]
40
max
[m
/h]
1306
3
max
260
[Pa]
t max
[Pa]
0
s min
[kg]
13
TRN 2
therm. relay
RP fans * - * / * - ** Ex
D
Ex
Explosion-proof design Ex
Electric motor
D – three-phase electric motor
Number of electric motor poles
4 – four-pole
6 – six-pole
Impeller diameter (cm)
Connection dimension B flange (cm)
Connection dimension A flange (cm)
Fan type
Working characteristics
The performance characteristics of RP Ex fans are measu-
red in a REMAK test room for aerodynamic and electrical
measurements of fans and measurement of pressure lo-
sses of passive elements.
In the data part of this catalog, next to the characteristics
of each fan, there is a table of the most important values
(see eg table 2). These values are also listed on the fan na-
meplate.
The meaning of the individual lines is as follows:
1 Value of nominal power supply voltage
2 Maximum power input of the motor at working
point 5c.
3 Maximum current at nominal voltage at working
point 5c.
4 Mean speed, rounded to tens, measured
at working point 5b.
5 Capacitor capacity with single-phase fans.
6 Maximum permissible transported air temperature.
7 Maximum air flow at working point 5c.
8 Maximum total pressure between points 5a–5c
9 Minimum permissible static pressure at point 5c.
10 Total weight of the fan.
11 Recommended fan output controller.
12 Recommended protecting relay of the fan
without controller and control unit
Used designations in fan parameters
m
– hmotnost (±10%)
S
– surface
V
– volume flow
n
– speed
t
– air temperature
∆p
– static pressure difference
s
∆p
– dynamic pressure difference
d
∆p
total pressure difference
–
t
ρ
– specific gravity of air
sound power level
L
–
W
sound power level weighted
L
–
WA
L
– relative sound level. ex. weighted
WA rel
U
– voltage
I
– current
P
– input power
kg
m
2
m
/h
3
min
-1
°C
Pa
Pa
Pa
kg/m
3
dB
dB(A)
dB(A)
V
A
W
5
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