The voltage of a pressure switch varies depending on whether it is used in a DC (Direct Current) or AC (Alternating Current) control circuit.
Pressure switches are essential components in many control systems, designed to open or close an electrical contact based on a change in pressure. The operational voltage for these switches is not a single, fixed value but rather a range of common voltages used in industrial and commercial applications.
Common Voltage Ranges for Pressure Switches
Control circuits employing pressure switches often utilize either DC or AC power sources. The specific voltage depends on the system requirements and application.
- DC (Direct Current) Voltages: These are typically found in lower-voltage control circuits and battery-powered systems.
- AC (Alternating Current) Voltages: These are common in general-purpose industrial control and building automation systems, especially at standard utility frequencies like 60Hz.
The table below summarizes the common voltages for pressure switches based on the type of circuit:
| Circuit Type | Common Voltages (60Hz for AC) |
|---|---|
| DC | 8V, 12V, 24V, 30V |
| AC | 24V, 120V, 240V, 480V |
As seen, while DC circuits for pressure switches commonly use voltages like 8, 12, 24, and 30 volts, AC circuits often operate at 24, 120, 240, and 480 volts at 60Hz. This shows that the 24-volt level is common across both DC and AC applications, making it a versatile option for various control systems.
Practical Considerations
When selecting or working with pressure switches, it's crucial to consider the intended voltage of the control circuit. Using a switch rated for a different voltage can lead to malfunction, damage to the switch or the circuit, or even safety hazards. Always verify the voltage requirements specified by the equipment manufacturer.
