Understand the difference.

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

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.

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CT

Symbols

Current transformer

A current transformer produces a secondary current related to the current in its primary conductor. A drawing uses the CT representation to show where current is measured and which metering or protection circuit receives that measurement. It does not, by itself, specify the CT ratio, accuracy class, burden or secondary connection.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEC / IEEE / ANSI

A distinction that matters

A CT measures current. A VT measures voltage. Their secondary circuits and isolation/testing arrangements are different.

Full referenceAdd to legend

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