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 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.

Inverter mode

See “on-line” mode.

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

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.

NO

Normally open.

NEC

National Electrical Code.

NFPA

National Fire Protection Association.

G — 2

Glossary

86-86000-00 B00

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MGE UPS Systems EX-5, EX-7, EX-11RT manual Iec