User's Manual

60
12 List of Terms
12.1 Technical terminology
DC/DC booster Circuit technology for increasing a DC voltage to a
higher voltage level
SBS S
tatic Bypass Switch
Appliance protection Term from overvoltage technology
Classic mains overvoltage protection consists of a
lightning surge arrester (class B), overvoltage
protection (class C) and, finally, the so-called
appliance protection (class D) – see also
http://www.phoenixcontact.de (“TRABTECH” topic)
IGBT I
nsulated Gate Bipolar Transistor
The latest design of high-performance transistors with
minimum control power requirement (MOSFET
structure) and minimum losses on the output side
(structure of a bipolar transistor)
Class D See appliance protection
LED L
ight Emitting Diode
Electronic semi-conductor component, commonly
referred to as an LED, used for optic signalling.
PFC P
ower Factor Correction
Circuit technology for minimising system disturbances
(particularly important when connecting non-linear
loads)
PWM P
ulse Width Modulation
Here: circuit technology for generating a sinusoidal
voltage of the highest quality from an existing DC
voltage
SNMP S
imple Network Management Protocol
A protocol encountered frequently in networks for
managing
/ handling components
VFD Output V
oltage and Frequency Dependent on mains
supply. The UPS output is dependent on mains
voltage and frequency fluctuations. Earlier
designation: OFFLINE
VI Output V
oltage Independent from mains supply
The UPS output is dependent on mains frequency
fluctuations, but the mains voltage is prepared by
electronic / passive voltage control units. Earlier
designation: LINE-INTERACTIVE
VFI Output V
oltage and Frequency Independent from
mains supply. The UPS output is independent of
mains voltage and frequency fluctuations. Earlier
designation: ONLINE