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Beschikbare talen
Beschikbare talen
6.6 Cable sizing
Grundfos can supply submersible drop cables for
any type of installation.
The cross-section of the submersible drop
cable must be large enough to meet the
Caution
voltage requirements specified in section
5.1
General.
The table values below are calculated from the
following formula:
I x 2 x 100 x PF x L x ρ
q =
U x ΔU
where
q
= Cross-section of submersible drop cable
2
[mm
].
I
= Rated maximum current of the motor [A].
PF = 1.0.
L
= Length of submersible drop cable [m].
ρ
= Specific resistance: 0.02 [Ωmm
U
= Nominal voltage [V].
ΔU = Voltage drop [%] = 4 %.
The 4 % voltage drop is according to IEC 3-64,
HD-384 Series.
The calculation gives the following maximum cable
lengths at a supply voltage of 240 V:
Motor
I
N
(P2)
[kW]
[A]
0.7
5.2
1.15
8.4
1.55
11.0
1.85
12
12
2
/m].
Max. cable length [m]
2
2.1 mm
/
2
1.5 mm
14 AWG
80
112
50
69
37
52
35
49
Cable size
2
3.3 mm
/
2
2.5 mm
12 AWG
133
176
83
109
62
82
58
76
2
2
4 mm
6 mm
213
320
132
198
99
149
92
139
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