w w w . a i r t e c h n i c . g r
Energy Box AC-Α, AC
16
w w w . a i r t e c h n i c . g r
ATHENS
+30 211 70 55 500 /
THES/NIKI
+30 2311 82 40 00
SELECTION OF ELECTRICAL CABLE CROSS-SECTION
(energy BOX AC-A EC / AC EC)
ENERGY-BOX
AC-Α EC /
AC EC
Unit
Voltage
(V)
Unit Power Input
(kW)
Current
(A)
Fuse
(A)
Cable Cross-Section
(mm²) for 50 M
and PF = 0,8
500
230
1,37
7,44
2 x 16
1,5
750
2,29
12,44
1.000
2,64
14,34
2 x 20
1.500
2,9
15,76
2.000
3,57
19,4
2 x 25
2,5
*3.000
400
Comp. 4,9 kW /
Fan 1,5 kW
Comp. 8,85 A /
Fan 8,15 A
3 x 25
4.000
10,68
19,29
* Compressor 400V and fan 230V for ENERGY-BOX AC-Α EC/ENERGY-BOX AC EC 3.000 unit models.
CABLE CROSS-SECTION FORMULAS
1
I current ꞊
P
U.CosQ
I cable > I current
2
%e ꞊
100.P.L
k.S.U²
, S ꞊
100.P.L
k.%e.U²
%e ꞊ %3
3
I cable > I fuse ≥ I current
Cable Cross-Section
S = Max (S1, S2, S3, 1,5 mm²)
* It is suitable for units with 230 V supply voltage.
P:
Power
I:
Current
U:
Voltage
S:
Conductor cross section
k:
Conductor coefficient
L:
Conductor length
%e:
The voltage drop
P:
1,37 kW
L:
50 m
U:
230 V
%e:
%3
PF: CosQ
: 0,8
k:
56 m/Ω
EXAMPLE OF CABLE CROSS-
SECTION CALCULATION
1
I current ꞊
1370 W
230.0,8
꞊ 7,44 A
The cable will be used, is selected from
the cable cross-section table so that the
equivalent ampere value in the table should
be higher than calculated “I current” value.
S1 = 0,5 mm²
2
%e ꞊ %3
S ꞊
100.1370.50
56.3.230²
꞊ 0,77 mm²
S2 ≥ 0,77 mm² > 1 mm²
S2 = 1 mm²
3
I cable > I fuse ≥ I current
I cable > 10 A ≥ 7,44 A
“I fuse” which will be higher than “I current”,
is selected.
The cable will be used, is selected from
the cable cross-section table so that the
equivalent ampere value in the table should
be higher than selected “I fuse” value.
I cable = 12 A
S3 = 0,5 mm²
Cable cross-section
S=Max (S1, S2, S3, 1,5 mm²)
S=Max (0,5, 1, 0,75, 1,5)
S=1,5 mm²
* It must be considered the above information for fan and compressor calculation in ENERGY-BOX AC-Α EC/
ENERGY-BOX AC EC 500, 750, 1.000, 1.500, 2.000 unit models.
Summary of Contents for ENERGY BOX AC
Page 43: ......
