Category: Piller UPS Application Design Guidance 2
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UPS Application Design Guidance 2
UNIBLOCK UBTD Diesel UPS - Operation
UNIBLOCK UBTD Dual Output Diesel UPS
In normal operation the load is fed via the coupling choke. The
special design of the coupling choke allows a high level of decoupling
between the input and output and blocks all harmonics and transient
events between the input and output.
The coupling choke is tapped with the UNIBLOCK machine. The generator
winding of this synchronous machine ensures the output voltage is kept
constant irrespective of the mains voltage. The generator winding feeds
the loads with the same dynamic response of an ideal AC supply. Peak
currents and high short circuit current (up to 18 times nominal current)
can be supplied by the UNIBLOCK machine even in the event of a mains
failure.
In the event of a mains failure power flows from the Powerbridge
(rotating kinetic energy store) or battery to the load via the UNIBLOCK
machine. If the kinetic energy store) or battery to the load via the
UNIBLOCK machine. If the mains does not return then the diesel starts
and comes up to speed. The overrunning clutch then closes for a soft
start. The load is ramped on to the diesel from the Powerbridge/battery.
The Powerbridge is then fully recharged and thus enables the full
stabilisation function (i.e. the Powerbridge will stabilise the output
frequency during load steps on and off the diesel by providing power or
absorbing power as required). Once in diesel operation, the motor
winding of the UNIBLOCK machine can become a generator and the same
diesel can supply the essential loads through an essential load output
and the second winding. The ‘clean’ UPS and ‘dirty’ mechanical loads are
kept isolated from each other by the two windings. On restoration of the
mains, the output voltage is synchronised to the mains and the input
breaker closes and the diesel is shut down.
Piller UNIBLOCK UBTD Diesel UPS Guide to Dimensions* & Weights -
Single Output Range
Piller UNIBLOCK UBTD Diesel UPS Guide to Dimensions* & Weights -
Dual Output Range
*Note: Mains connection and energy storage modules are available in
many configurations. Please consult us for details.
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Piller (UK) Ltd
91 Chesterton Lane
Cirencester
GL7 1YE
Tel: 01285 657721
Fax: 01285 654823
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