Side-by-side reference

Understand the difference.

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

First referenceCompare with

W/var

Symbols

Combined recording wattmeter and varmeter

This form represents one recording instrument that logs both active power and reactive power on the same time base. It is drawn at generator and interconnection points where the relationship between watts and vars matters, for example when checking excitation control or reactive power commitments.

Drawing use: SLD / Schematic
Application: Metering & protection
Reference family: IEC

A distinction that matters

The combined recorder logs watts and vars together; a recording wattmeter logs active power only.

Full reference

W REC

Symbols

Recording wattmeter

A recording wattmeter measures active power and records it according to the specified instrument. The schematic identifies voltage and current inputs while the logging settings belong in the instrument configuration.

Drawing use: SLD / Schematic
Application: Metering & protection
Reference family: IEC / Manufacturer

A distinction that matters

A wattmeter records power at a time or interval; an energy meter accumulates power over time.

Full reference

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