Stulz ENS 18 A - Cable dimensions

© STULZ GmbH, Hamburg DE / 06-2016 / 1000687
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STULZ UltraSonic -System for duct humidication ENS 14 A - 18 A- Installation
Type Electrical
supply
Current Maximum cable
length (1.5 mm²)
Maximale Leitungs-
länge (2,5 mm²)
Rows
transducer
ENS 14 A 48 V AC 2 x 7,81 A 2 x 5 m 17 m
2
ENS 18 A 48 V AC 2 x 10,0 A 2 x 4 m 13 m
2
7.5.2. Cable dimensions
The connecting cable bet
ween th
e ultrasonic humidier and the control box (transformer) reduces the
voltage at the ultrasonic humidier as per the formulas below:
i = Voltage drop [V]
L = Cable length [m]
I = Current [A]
A = Cable cross-section [mm²]
ϒ = Electrical conductivity [m / (Ω x mm
2
)]
Note: 56.2 [m / (Ω x mm
2
)] for copper
(4% of 48 V AC electrical supply, i.e. maximum voltage drop 1.92 V. This results in a minimum permitted
electrical supply of 46.08 V AC).
If the voltage drop between the control cabinet and the ultrasonic humidier is 4% or lower, the voltage
is still within tolerance. If the voltage falls below this value, however, please select a larger cable cross-
section with the aid of the table.
7.5.1.3. Connection of humidier accessory sets
CAUTION
Connection of accessory sets.
To connect accessory sets, please pay attention to the circuit diagrams in the technical
documentation for accessory sets.
Note
CAUTION
Danger of death. Electric shock risk.
The cable dimensions must be calculated by expert personnel.
WARNING
DANGER
2 x L x I
i =
ϒ x A
2 x L x I
=
56.2
[m / (Ω x mm
2
)]
x A