13 List of terms

13.1Technical 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 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

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 from 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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