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When extended back-up time is required (more than 1-2 hours), a
diesel generator combined with a UPS having 5-10 min. back-up power
often provides the optimal solution. In the event of mains failure,
Silcon pulls power from the battery while the diesel generator is
started and stabilized. As soon as the supply is re-established by
the diesel generator, the Silcon provides the load with conditioned
generator-supplied power.
Before the introduction of the innovative Silcon, combining UPS
and generator power presented a serious problem. When switching back
to normal operation with a traditional UPS, the thyristor controlled
rectifiers draw high inrush current to magnetize the rectifier input
transformer. They also cause a major distortion of the supply due to
the commutation of the thyristors. The generator must be
significantly over-sized to prevent the generator output voltage
from being distorted, by commutation of the thyristors in a
thyristor controlled rectifier.
With the Silcon you can use diesel generators without
over-sizing. In fact, you can size to the same rating, because the
sinusoidal input current causes no distortion feedback to the
generator.
For very sensitive diesel installations the Silcon can even be
programmed for soft start. When switching back to normal operation
it slowly transfers the load from battery to generator. | 
