1.3
Definitions
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Critical Load
These are loads that require clean, regulated and continuous AC power and
which are connected to the output of the ELI module
ELI Module
The portion of the ELI system that contains one or more of: the rectifier /
DFC, charger, inverter, static bypass switch, maintenance bypass switch,
controls, monitoring, and indicators.
Rectifier / DFC
Contained in the ELI module. Responsible for converting the normal AC input
power to DC power and supplying the inverter with DC power.
Charger
Contained in the ELI module. Responsible for recharging the batteries.
Inverter
Contained in the ELI module. Responsible for converting DC power (supplied
by the rectifier) to regulated and filtered AC power that is then supplied to the
critical loads.
Static Bypass Switch
Contained in the ELI module. Responsible for automatically transferring the
attached load, without interruption, from the inverter AC output to the bypass
AC power source in the event of an overload or degradation of the inverter’s
performance.
Maintenance Bypass Switch
:
Contained in the ELI module. Used to transferring the attached load, without
interruption, from the inverter AC output to the bypass AC power source while
electrically isolating the static bypass switch, rectifier / DFC, charger and
inverter. Used for maintenance purposes.
Battery
The battery system provides DC power to the inverter input when the normal
AC input power to the ELI fails.
IGBT
Isolated Gate Bipolar Transistor.
PWM
Pulse Width Modulation.
ELI
Emergency Lighting Inverter.
BBU
Battery Backup Unit.
PFC
Power Factor Correction.
EPO
Emergency Power Off.
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M4102 Ty-Borealis 8-48KW Operators Manual v1.0 2013-08-14
