EX 5/7/11RT Systems
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 |
| 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. |
Inverter mode | See |
I | Current. |
IEC | International Electrotechnical Commission. |
IEEE | Institute of Electrical and Electronic Engineers. |
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. |
IGBT | Insulated gate bipolar transistors. |
I/O | Input/Output. |
I/T or IT | Information Technology. |
kVA | |
L | Line. |
LCD | |
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. |
NO | Normally open. |
NEC | National Electrical Code. |
NFPA | National Fire Protection Association. |
G — 2 | Glossary |
