© STULZ GmbH, Hamburg
DE / 06-2016 / 1000687
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51
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STULZ UltraSonic -System for duct humidification 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 between the ultrasonic humidifier and the control box (transformer) reduces the
voltage at the ultrasonic humidifier 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 humidifier 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 humidifier 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
Summary of Contents for ENS 14 A
Page 4: ......
