12 List of Terms

12.1Technical 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 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

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

Light 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

Pulse Width Modulation

 

Here: circuit technology for generating a sinusoidal

 

voltage of the highest quality from an existing DC

 

voltage

SNMP

Simple Network Management Protocol

 

A protocol encountered frequently in networks for

 

managing / handling components

VFD

Output Voltage and Frequency Dependent on mains

 

supply. The UPS output is dependent on mains

 

voltage and frequency fluctuations. Earlier

 

designation: OFFLINE

VI

Output Voltage 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

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