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Appendix
Word Definitions
(1) Whole UPS concern
UPS: Uninterruptible P
ower System
(2) Circuit breakers
MCCB: Molded C
ase Circuit Breaker
ACB: Air Circuit Breaker
(3) Graphical interface
Graphic display panel: It contains push buttons, an LCD and LED’s
to show the operating procedure and/or the UPS status.
LCD: Liquid Crystal Display. This shows the operational
procedures and the status of the UPS.
LED: Light Emitting Diode. Individual lamps located on the
graphic panel indicate the status of the UPS.
Scroll buttons: The up and down buttons are used to scroll forward/backward
LCD screens. It scrolls back to the 1
st
screen after circulating
all the screen pages.
(4) Control system
Synchronized mode: The UPS output tracks the phase and frequency of the Bypass.