Product specifications

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reliable source of backup power; however connecting a generator directly to a sensitive load can cause
problems. Inserting a UPS system can mitigate these, but further problems often arise from the
interaction between the UPS and generator. These can be solved by sourcing suitable UPS equipment.
The UPS battery is essential for protection from short term power outages. However the battery typically
has a rectifier charger control circuit which imposes notches on the power feed, interfering severely with
some types of generator control. Additionally, some charger circuits draw non sinusoidal input current,
creating harmonics, measured as total harmonic distortion (THDi).
Generators have inherent frequency control limitations while UPS
inverters have limited ability to synchronize with a fluctuating frequency
source.
UPS technology features solutions to these problems. A THDi of below 7%
at full load, a separate battery charger circuit, together with a Generator
'On' signal between UPS and generator reduces the UPS battery charging
current, in turn reducing load, notching and heating effects on the
generator. Step loading on the generator is controlled firstly by soft start
of the rectifier current, eliminating high current peaks during mains
recovery. UPS uniquely also limits step loading during mains recovery by sequentially switching on the
rectifiers within a parallel configuration. Additionally, UPS systems are designed to eliminate excessive
excitation and generator voltage rise.
Electric Power Distribution
Whether in industrial plants or in buildings: Every technical system depends on a reliable supply of
electric power. Even a short power failure may have serious consequences.
Distribution boards are especially suitable for building, residential and similar installations. They may be
used also in industrial installations. They are manufactured for
mounting into hollow walls, for concealing in plaster walls and for
mounting on the wall.
Sheet-steel switchboard cabinets fulfil all the requirements for
constructing low-voltage electrical distribution installations. These
can be used in such very simple applications as lighting, motor or
control circuits as well as in the most demanding applications that
require very sturdy cabinets, are configured with high rated currents,
or high short-circuiting resistance.
The key to a pleasant feel-good atmosphere in hotel lobbies is the
interplay between decorative light and functional light. From the
moment guests enter the hotel they are made to feel welcome by
light that draw attention to particular areas of the lobby and
therefore makes it easier for them to find their way around. This
area can be promoted by highlighting the ceilings.