#Product Trends
Flat heating plates
for housings, switch cabinets and devices
Low surface temperature
> Limited space requirement, just 3mm thick
> Even heat distribution over the whole surface
> Without ventilator – no dust whirls
> Maintenance-free, long service life
Housings with electrical, electronic or mechanical installations are often subject to temperature
fluctuations, which lead to condensation, corrosion and leakage currents. In order
to guarantee the functional safety of these installation elements, it makes sense and
is cost-efficient to create a balanced inside temperature. HORN heating consists of an
anodised 1.5 mm thick aluminium plate vulcanised onto a 1.5 mm thick silicone heating
film. A small amount of space is required thanks to this flat construction and extensive
heat radiation is still provided.
TECHNICAL DATA
Operating voltage 220 – 240 V, 50/60 Hz alternative 115 V, 50 Hz
Electrical power 40 W, 100 W, 200 W
Heating element Silicone heating
Surface temperature With bi-metal 65/45°C controller, higher temperatures
can be reached without a temperature controller
depending on the environmental conditions
Connection 0,5 m line 2 x 0,75 mm2
Plate Aluminium
Fixing Retainer bracket on TS 35 mounting rail or M4 screws
Protection type/class IP X4 / 1
Approvals VDE + UL
INSTALATION NOTES
Installation must take place according to the valid
VDE and CE guidelines for the respective application.
The corresponding protection measure and contact
protection are to be realised by the user with
installation. To achieve good temperature control
in the full space in the housing, the heating plate
should be mounted in the lowest area. A distance
of at least 10 mm to the side walls and 50 mm to
the underside is required so convection can form.
A distance of 35 mm to thermo-plastic parts is
recommended. A separate room temperature controller
in front of the heating plate must be switched
to control the inside housing temperature.
ESTABLISHMENT OF NECESSARY HEATING POWER
The necessary heating power depends on the following parameters:
> Location (inside, outside), switch cabinet size (surface)
> Environmental temperature, material, insulation, loss power of installed components
> An estimated calculation is possible as follows:
a.) Standstill heating: inside P = T (K x A)
outside P = T (K x A) x2
b.) Operating heating: inside P = T (K x A) – Pv
(Installation devices switched on) outside P = T (K x A) x2 – Pv
P = required heating power
T = Temperature difference between the required average switch cabinet inside
temperature and environmental temperature
K = heat transmission figure (for steel sheet metal 5 – 6 W/m2 K)
A = overall free-standing housing surface in m2
Pv = overall installed loss power in W