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13 List of terms
13.1 Technical terminology
DC/DC booster Circuit technology for increasing a DC voltage to a higher
voltage level
SBS Static Bypass Switch
Appliance protection Term from overvoltage technology
Classic mains overvoltage protection consists of lighting
surge arrester (class B), overvoltage protection (class C)
and, finally, the so-called appliance protection (class D)
- see also the http://www.phoenixcontact.com
website
(topic "TRABTECH")
IGBT Insulated 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 Power 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 Voltage and Frequency Dependent from 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 Voltage and Frequency Independent from
mains supply. The UPS output is independent of mains
voltage and frequency fluctuations. Earlier designation:
ONLINE