Voltagehighvoltagelow

Voltagehighvoltagelow is a term used in electronics and automation to describe a binary signaling condition in which a signal line or device presents either a high voltage level or a low voltage level. The phrase is not a formal standard, but appears in documentation, code comments, and schematic annotations to denote the two logical states of a line, such as a digital output, interlock signal, or sensor reading.

Definitions of high voltage and low voltage vary by region, standard, and application. In general, high voltage refers to levels capable of causing harm or arcing, often hundreds or thousands of volts, while low voltage refers to safer levels typically used for logic and control, such as single-digit or tens of volts. In consumer electronics, low voltage commonly means voltages in the 3.3–5 V or 12–24 V range, whereas industrial systems may use higher ranges.

Usage: In designs, a label like voltagehighvoltagelow may be used to describe the required input levels for a device, or the expected state of a protective interlock. A voltage high indicates the line is at or near the supply rail, while voltage low implies it is near ground or a defined reference. Designers often map these states to specific logic thresholds and include decoupling, isolation, and protection as needed.

Measurement and safety: Verifying voltagehighvoltagelow states requires appropriate instrumentation, such as a multimeter, oscilloscope, or HV probe for high voltages. When dealing with high voltage, strict safety practices and proper insulation, shielding, and interlocks are essential to prevent shock hazards and equipment damage.

See also: High voltage, Low voltage, Logic level, Digital signal, Interlock, Safety standards.