53
9
Glossary
9.1
Technical terms
AVR
Automatic Voltage Regulation
against mains voltage variations
DC/DC Booster
Circuit technology to boost the direct voltage
on a higher voltage level
EPO
Emergency Power Off
device for emergency shut down
PFC
Power Factor Correction
Circuit technology to minimize circuit
backfeed (important for non linear loads)
Appliance protection
Surge technology term
The conventional mains surge protection
consists of an mains earthwire (class B),
an overvoltage protection (class C) and an
appliance protection (class D) – see also
e.g. under http://www.phoenixcontact.de
(topic „TRABTECH“)
Class D
see appliance protection
LED
Light Emitting Diode
Electronic semiconductor component,
commonly called light diode. Used for optical
signaling.
SNMP
Simple Network Management Protocol
common protocol in networks to manage /
control appliances
VFD
Output Voltage and Frequency Dependent
from mains supply
The UPS output depends of mains voltage
and frequency variations. Former notation:
OFFLINE
VI
Output Voltage Independent from mains supply
The UPS output is independent of mains
voltage and frequency variations. The mains
voltage however is rectified by electronic /
passive voltage regulators. Former notation:
LINE-INTERACTIVE
VFI
Output Voltage and Frequency Independent
from mains supply
The UPS output is independent of mains
voltage and frequency variations. Former
notation: ONLINE
Summary of Contents for A PROTECT B. 1500
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