Functional Description - Kohler PowerWAVE EL 100XA User Manual

2.2 FUNCTIONAL DESCRIPTION

The PowerPro ELXA is a modular Static Inverter (SI) comprising power module, distribution and
batteries in one cabinet.
All components are all accessed from the front of the cabinet with all power connections
located at the top of the PowerPro ELXA cabinet.
MCB1
MCB3-8
MCB2
AVR: The first stage of the concept uses a single phase controlled automatic voltage regulator
as a form of surge protector. An AVR monitors the voltage constantly to deal with both dips
and spikes. This feature includes "Buck" and "Boost" technology to output regulated and
controlled voltage at a selectable figure.
CHARGER: In ELXA Series EL INVERTERs, a controlled charger is used to produce DC voltage for
both charging the batteries.
BATTERIES: Batteries are used as reserve DC power supply for the Inverter in case of mains
failure. Batteries are connected in series to obtain a DC supply. Batteries are discharged by
the inverter during mains failure. The discharged batteries are re-charged by the Rectifier on
a constant voltage / current limiting basis, if AC mains power is available.
INVERTER: The Inverter converts the DC BUS voltage supplied by the batteries into a well
regulated, fully digital controlled AC voltage with fixed voltage and frequency.
The output of the inverter is used to supply the critical loads connected to the EL INVERTER
output.
STATIC TRANSFER SWITCH (STS): This is an electronically controlled transfer switch, which
enables the critical load to be connected either to inverter output or to by-pass power source.
During normal operation, the load is supplied by the mains output, in case of a mains
disturbance or a mains failure the load is automatically transferred to the inverter source.
Figure 2.1. Electrical Block Diagram
: Mains Input Circuit Breaker.
: Output Circuit Breaker.
: Battery DC Circuit Breaker.
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