Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

PCSS

Symbols

PTP client synchronization status

Reports whether the assigned device accepts its required network time reference. A station time system provides a shared time reference for protection records, measurements and automation. Different devices can use different timing protocols, so the time source, distribution path and quality information must remain identifiable.

Drawing use

Schematic

Application

Metering & protection

Reference family

Manufacturer

A distinction that matters

The accepted accuracy must match the application. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.

Full referenceAdd to legend

SOE

Symbols

Sequence-of-events recorder

A sequence-of-events recorder monitors breaker auxiliary contacts, protection trip outputs, alarms and other binary signals, and stores each change with an accurate timestamp. After an incident the list shows which device operated first, which is often impossible to tell from alarms alone.

Drawing use

Schematic

Application

Metering & protection

Reference family

Manufacturer

A distinction that matters

An SOE recorder logs binary changes in time order; a disturbance recorder captures analogue waveforms.

Full referenceAdd to legend

Follow the full entry for source drawings and the appropriate standard or selected product. Equipment previews show a manufacturer drawing where available, otherwise a 3D thumbnail.