Understand the difference.

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

SL

Symbols

Synchronising lamps

Synchronising lamps are connected between corresponding phases of the running system and the incoming machine. As the phase difference changes the lamps brighten and dim, and in the dark-lamp method the breaker is closed when they are dark, showing the voltages are in phase.

Drawing use

Schematic

Application

Metering & protection

Reference family

IEC / Manufacturer

A distinction that matters

Synchronising lamps give a visual indication; a synchroscope shows phase angle and slip direction directly.

Full referenceAdd to legend

SYNC SCOPE

Symbols

Synchronoscope

A synchronoscope indicates the phase relationship and relative frequency behaviour of two AC sources. Its input connections identify which source is incoming and which is the reference.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEC / Manufacturer

A distinction that matters

A synchronoscope provides indication; a synchronism-check relay provides a configured permissive output.

Full referenceAdd to legend

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.