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

BIDM

Symbols

Breaker interrupted-current duty monitor

Accumulates the selected current interruption events according to the documented maintenance model. Yard equipment supervision carries the condition and support-system information of primary equipment into station alarms. A monitor's declared alarm, measurement and self-fault output need separate point names.

Drawing use: Schematic
Application: Power distribution
Reference family: Manufacturer

A distinction that matters

The model is specific to the equipment 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 reference

Symbols

Partial discharge sensor

Partial discharge sensors detect small electrical discharges inside insulation before it fails. Common types include transient earth voltage sensors on metal-clad switchgear, UHF antennas in gas-insulated equipment and high-frequency CTs on cable earth straps, each feeding a monitoring unit that records and trends the activity.

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

A distinction that matters

A partial discharge sensor assesses insulation condition; an insulation monitoring relay measures insulation resistance of an unearthed system.

Full reference

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.