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12.1 DEFINITIONS OF TECHNICAL TERMS
DC/DC booster Switching technology for increasing a DC voltage to
a higher voltage level
Device protection Term from the field of overvoltage technology
Conventional mains overvoltage protection consists of
a lightning arrester (class B), overvoltage protection
(class C), and what is referred to as the device
protection (class D)
IGBT Insulated Gate Bipolar Transistor
High-performance, state-of-the-art transistors with
an ultra-low control power requirement (MOSFET
structure) and ultra-low losses on the output side
(structure of a bipolar transistor)
Class D See device protection
LED Light Emitting Diode
Electronic semiconductor component used for optical
signaling
PFC Power Factor Correction
Switching technology for minimizing circuit feedback
(especially important when connecting non-linear
loads)
PWM Pulse-Width Modulation
In this case: switching technology for generating a
maximum-quality sinusoidal voltage from an existing
DC voltage
SNMP Simple Network Management Protocol
Common protocol in the network for managing
components
VFD Output Voltage and Frequency D
supply. The UPS output is dependent on mains
voltage and frequency fluctuations. Previously called:
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