User manual

86-86000-00 B02 - Page 68
5. Appendix
dBrnC
Decibel above reference noise.
DC or dc
Direct current, or voltage.
Earth ground
A ground circuit that has contact with the earth.
Electrician
Refers to an installation electrician qualified to install heavy-duty electrical
components in accordance with local codes and regulations. Not necessarily qualified
to maintain or repair electrical or electronic equipment.
FET
Field effect transistor.
Freq.
Frequency.
Frequency slew rate
The change in frequency per unit of time. Given in term of Hz per second (Hz/sec.).
GND
Ground (safety).
Hz
Hertz, frequency measurement unit, 1Hz is one cycle per second.
I
Current.
IEC
International Electrotechnical Commission.
IEEE
Institute of Electrical and Electronic Engineers.
IGBT
Insulated gate bipolar transistors.
Input branch circuit
The input circuit from the building power panel to the equipment.
Inverter
An electrical circuit that generates an AC voltage source from a DC voltage source.
Inverter mode
See “on-line” mode.
I/O
Input/Output.
I/T or IT
Information Technology.
kVA
KiloVolt-Ampere; is equal to 1000 Volt-Ampere.
L
Line.
LCD
Liquid-Crystal Display unit.
LED
Light Emitting Diode.
Mains or Mains 1
Main AC input source.
Mains 2
Bypass AC input source.
mA
Milliampere.
MAX.
Maximum.
MCM
Thousand circular mil; standard wire sizes for multiple stranded conductors over 4/0
AWG in diameter. M is from Roman numerical system indicating 1000.
N
Neutral.
NC
Normally closed.
NEC
National Electrical Code.
NFPA
National Fire Protection Association.
NO
Normally open.