Understand the difference.

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

PH LOSS

IEEE / ANSI

ANSI/IEEE Phase-loss monitoring relay form

This reference locates phase-loss monitoring relay in Autodesk's IEEE-oriented miscellaneous relays family. A phase-loss relay supervises the presence of the specified phases in a three-phase system. The drawing identifies the monitored source and output used by control or protection logic. The public library uses HCR1F42 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Relay Sensing Lack of Phase in Three Phase System. Autodesk IEEE Symbol Preview: Miscellaneous Relays, block HCR1F42. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.

A distinction that matters

Phase loss is different from phase reversal or current unbalance.

Full referenceAdd to legend

PH LOSS

Symbols

Phase-loss monitoring relay

A phase-loss relay supervises the presence of the specified phases in a three-phase system. The drawing identifies the monitored source and output used by control or protection logic.

Drawing use

SLD / Schematic

Application

Metering & protection

Reference family

Manufacturer

A distinction that matters

Phase loss is different from phase reversal or current unbalance.

Full referenceAdd to legend

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