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

MRRR

Symbols

Microgrid resource runback request

Requests the documented reduction of an assigned resource output following its initiating condition. Active-power dispatch allocates the electrical work performed by the microgrid resources. A total site target, a resource power limit and the actual measured contribution are different quantities that must be connected clearly in the diagram.

Drawing use: Schematic
Application: Microgrid systems
Reference family: Manufacturer

A distinction that matters

Runback differs from immediate resource disconnection. 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

PPC

Symbols

Power plant controller

A power plant controller measures voltage, current, active and reactive power at the plant connection point and adjusts setpoints of all inverters or turbines to meet the network operator's requirements. Typical functions include active power limits, ramp rates, frequency response, voltage or reactive power control and power factor control.

Drawing use: SLD
Application: Microgrid systems
Reference family: IEC / IEEE / ANSI

A distinction that matters

A power plant controller manages one generating plant at its connection point; a microgrid controller also manages loads and islanding.

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.