List of abbreviations

Meaning of abbreviations used in this document

Abbreviation

Meaning

1PH + N

Single-phase network with 1 phase and neutral conductor

3PH

Three-phase 3-wire network with 3 phases without neutral conductor

3PH + N

Three-phase 4-wire network with 3 phases and with neutral conductor

AC

Alternating voltage

ATSE

Automatic transfer switching equipment

Cu

Copper

DC

Direct voltage

DPS

Dual power supply

EN

European Standard

ESD

Electrostatic discharge

IEC

International Electrotechnical Commission

IP

International Protection

N

Neutral conductor

PH

Phase

RTSE

Remotely operated transfer switching equipment

Meaning of symbols and abbreviations

Symbol/abbreviation

Meaning

ΔU

Voltage tolerance

ΔF

Frequency tolerance

I2t

Let-through energy

Icm

Short-circuit current making capacity

Icw

Short-time withstand current

Ith

Thermal current

Ue

Rated operational voltage

UImp

Impulse withstand voltage

Un

Nominal voltage