What is the standard abbreviation for a phase meter on electrical diagrams?

The standard abbreviation for a phase meter on electrical diagrams is "PH." This abbreviation is widely accepted in the industry for indicating a device that measures the phase angle between two alternating current (AC) waveforms. Phase meters are crucial in understanding the relationship between voltage and current in AC systems, impacting various applications such as motor control, power distribution, and energy efficiency.

Using "PH" allows for a clear and concise representation on electrical schematics, which is essential for effective communication among electricians, engineers, and technicians. This standardization helps ensure that anyone reviewing the schematic can quickly recognize the function of the phase meter without confusion.

In contrast, the other options likely do not conform to industry standards for phase meters, leading to potential misinterpretations when reading electrical diagrams.