9 Glossary
9.1Technical terms
Class D, Class III | see equipment protection |
DC/DC Booster | Circuit technology to boost the direct voltage on |
| a higher voltage level |
Equipment protection | Technology term of the surge voltage protection: |
| the conventional surge voltage protection consists |
| of a lightning current protection (class B, class I), a |
| surge voltage protection (class C, class II) and an |
| equipment protection (class D, class III) – see also |
| e.g. http://www.phoenixcontact.de (topic „TRABTECH“) |
IGBT | Insulated Gate Bipolar Transistor |
| The latest design of |
| with minimum control power requirement (MOSFET |
| structure) and minimum losses on the output side |
| (structure of a bipolar transistor) |
LED | Light Emitting Diode |
| Electronic semiconductor component, commonly |
| called light diode. Used for optical signalling. |
PFC | Power Factor Correction |
| Circuit technology for |
| less mains distortion (important for 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 |
| 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: |
VFI | Output Voltage and Frequency Independent from |
| mains supply |
| The UPS output is independent of mains voltage |
| and frequency variations. Former notation: ONLINE |
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