Direct current (DC) is an electric current that does not change direction and flows continuously in one direction with a relatively stable voltage.
Main features:
- Direction: Only one (from «+» to «–»).
- Voltage: Can be constant (batteries) or pulsating (after rectification).
- Frequency: 0 Hz (no periodic changes).
Where is it used?
- Batteries and accumulators (phones, laptops, electric vehicles).
- Electronics (microchips, LED lamps, motherboards).
- Solar panels (generate DC, then the inverter converts to AC).
- DC motors (in electric vehicles, industry).
- Low-voltage networks (for example, 12V/24V in cars).
DC voltage monitoring:
Portable voltage testers (for example, Dielectric Tester HVC-Test) are used for safe measurement of high-voltage DC circuits.
DC is a stable current that powers almost all electronics and portable devices. Unlike AC, it is not suitable for long-distance transmission, but it easily accumulates in batteries.
