EMAS PSA020OK422S voltmeter measuring cam switch, a 20 A four-pole rotary selector designed for phase-to-phase voltage measurement in three-phase electrical systems.
£27.19
The EMAS PSA020OK422S is a reliable three-phase voltmeter measuring cam switch designed for selecting voltage measurement points in industrial electrical panels and control systems. As part of the EMAS PSA series rotary cam switches, it provides dependable manual switching, compact installation and long service life for electrical monitoring applications.
This switch is designed for phase-to-phase voltage measurement, allowing a single voltmeter to be used for monitoring different combinations of a three-phase supply. Its four-position selector arrangement enables operators to select the required measurement circuit while maintaining reliable mechanical operation.
With a 20 A rated current, four-pole configuration, four-position selector function and 45° switching angle, the EMAS PSA020OK422S is suited for industrial control panels, distribution boards and electrical measurement systems.
Measuring cam switches such as the EMAS PSA020OK422S provide a simple and effective method of selecting voltage measurement circuits. They allow operators to monitor different phase combinations using a single voltmeter, reducing panel space requirements and simplifying electrical monitoring.
The PSA series is designed for industrial applications where compact installation, reliable switching and long operating life are required. The PSA020OK422S can be integrated into electrical distribution panels, automation systems and industrial monitoring equipment.
| Manufacturer | EMAS |
|---|---|
| Series | PSA Rotary Cam Switches |
| Model | PSA020OK422S |
| Product type | Voltmeter measuring cam switch |
| Rated current | 20 A |
| Number of poles | 4P |
| Measurement type | Phase-to-phase voltage selection |
| Number of positions | 4 |
| Switching angle | 45° |
| Rated voltage | 400 V AC |
| Insulation voltage | 690 V |
| Short circuit breaking capacity | 6 kA |
| Frame size | 48 × 48 mm |
| Protection rating | IP54 / IP20 depending on installation conditions |
| Mechanical life | 100,000 operations |
| Electrical life | 50,000 operations |
| Contact material | AgNi |
The EMAS PSA020OK422S is a voltmeter measuring cam switch used for selecting phase-to-phase voltage measurement points in three-phase electrical systems.
The PSA020OK422S has a rated current of 20 A.
This voltmeter selector switch features a four-position switching arrangement.
The PSA020OK422S is designed for phase-to-phase voltage measurement in three-phase electrical systems.
The switch is typically installed in electrical control panels, distribution boards and industrial measurement systems.
EMAS PSA series cam switches are widely used in industrial control and measurement applications where reliable manual switching, compact installation and long service life are required.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...