General sales and delivery conditions of UV-Technik Speziallampen GmbH are valid
.
Provision of the manual is mandatory
.
operating manual EVG UVT 200-480W
subject to change without notice
page 15 of 17
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
100000
70
80
90
100
110
lif
e tim
e
h
temperature of electrolytic capacitor in
°
C
Grounding
A clean earth potential and a proper grounding with an adequate cable cross section are the preconditions
for compliance with the EMC standards. Only if this is guaranteed, high frequecy disturbances can be
derived an thus prevented. Therefore, always connect all grounding terminals. Ground the mounting base
plate. Do not forget to ground the cabinet door. Use toothed washers for a reliable contacting of painted
surfaces/housings. Avoid ground loops.
Additional notes for cabling
Any damage to the cables must be avoided. Cable penetrations through housings shall have no burrs and
must be adequate insulated. The same applies to edges touched by the cable. Use cable glands and bent
protections and consider the allowed bending radiuses. The cable specification must comply with the
environmental conditions on site. If necessary, special cables need to be used (e.g. waterproof, oil- or
flame-resistant, etc.). Should cables be exposed to UV radiation or to ozone, generated by UV lamps, they
must be insulated with Teflon (PTFE) or fibre glass. All other materials are not sufficiently UV-stable and
need therefore to be protected in an appropriate manner.
Temperature behaviour
The lifetime of an electronic device is determined by the error rate of the electronic components of which
it consists. Generally spoken, the higher the temperature, the higher the error rate, the shorter the lifespan.
In the EVG UVT, the electrolytic capacitor is the lifespan-determining component (see chart). We use only
premium-quality capacitors of the highest temperature
stability. In compliance with the installation
instructions as well as the maximum housing
temperature, a lifetime of at least 50,000 hours is
expected. That a temperature change of 10K doubles
or halves the life of the capacitor can be seen as rough
calculation. Please make sure that the specified
maximum case temperature is not exceeded even in
extreme operation (worst case). If you measure the
temperature contact-free, please make sure that the
correction factor for the measured surface is adjusted correctly. Otherwise, significant measurement errors
may occur.
A sufficiently large cabinet should be chosen. The contained air must be able to circulate. If possible, use
sheet metal housings. In comparison, plastic and stainless steel are the worse heat conductors. Also with
regards to the shielding of electromagnetic radiation caused by the ballasts, the sheet metal is the best
choice. When calculating the size of the cabinet according to the specified loss, do not forget to add the
loss of other build in components. Assemble the ballasts if possible in the lower part of the cabinet, as it is
cooler. The distance between the EVG UVT must be at least 1 cm. Do not restrict the air convection with
other fixtures or installation channels. If you need to assemble the devices above each other, please note
that their operation is influenced by heat generation. The maximum case temperature must not be
exceeded even for the upper unit. Avoid the input of heat from the outside. Assemble a roof for shading
the control box for example. Decouple warm lamp housings from the ballast housings. Otherwise, it is of
course beneficial to couple thermally cold equipment (e.g. reactor with cold water) to the cabinet of the
EVG UVT. Turn on active cooling when overheating threatens. Wait long enough while doing temperature
tests to reach the thermal balance of the ballasts. This can take up to several hours. Try to keep the case