EMAS PSA020OK723S is a 20 A three-phase seven-position voltmeter measuring cam switch with a 45° rotation angle, 48 × 48 mm frame and IP54 protection.
£30.91
The EMAS PSA020OK723S is a compact and reliable 20 A three-phase voltmeter measuring cam switch designed for selecting different voltage measurement points in industrial electrical panels, distribution boards and control systems. As part of the EMAS PSA series, it provides seven selectable positions, a 45° switching angle and a compact 48 × 48 mm panel format.
The PSA020OK723S is specifically configured as a voltmeter measuring switch for three-phase measurement applications. Its seven-position selector enables an operator to switch a connected voltmeter between different phase-to-neutral and phase-to-phase measurement points in a three-phase electrical system.
With a rated operational current of 20 A, an AC21A utilisation category, a 690 V insulation voltage and a 4 kV impulse withstand voltage, the PSA020OK723S is designed for reliable operation in industrial electrical installations. Its IP54 protection rating, AgNi contacts and compact construction make it suitable for control and measurement panels.
Measuring cam switches provide a simple and dependable method of selecting electrical measurement points from a single rotary control. They are commonly installed alongside voltmeters and other panel instrumentation where operators need to select different phase-to-neutral or phase-to-phase measurement points without changing the measuring instrument.
The EMAS PSA020OK723S is configured specifically for three-phase voltmeter measurement and provides seven selectable positions with 45° rotary operation. Its 48 × 48 mm format and robust contact construction make it suitable for integration into industrial control panels, distribution boards and electrical measurement systems.
| Manufacturer | EMAS |
|---|---|
| Series | PSA |
| Model | PSA020OK723S |
| Product type | Voltmeter measuring cam switch |
| Switch type | Measuring |
| Application | Voltmeter measurement circuit selection |
| Number of phases | 3-phase |
| Rated operational current (Ie) | 20 A |
| Utilisation category | AC21A |
| Number of positions | 7 |
| Rotation angle | 45° |
| Frame size | 48 × 48 mm |
| Insulation voltage (Ui) | 690 V |
| Impulse withstand voltage (Uimp) | 4 kV |
| Dielectric strength, body to contact | 1,890 V AC |
| Dielectric strength, contact to contact | 1,890 V AC |
| Insulation resistance | minimum 10 MΩ at 500 V DC |
| Mechanical life | minimum 100,000 operations |
| Electrical life | minimum 50,000 operations |
| Operating frequency | 120 operations/hour mechanical and electrical |
| Operating temperature | −25 to +80 °C |
| Pollution degree | 3 |
| Protection degree | IP54 |
| Contact material | AgNi |
| Recommended cable section | 1–2.5 mm² |
| Short-circuit breaking capacity (Ics) | 6 kA |
| Standards | TS EN 60947-3 |
The PSA020OK723S is a voltmeter measuring cam switch used to select different voltage measurement points in three-phase electrical panels and measurement systems.
The PSA020OK723S has a 20 A rated operational current and is specified for the AC21A utilisation category.
The PSA020OK723S has seven selectable positions with a 45° rotary switching angle.
The PSA020OK723S uses a compact 48 × 48 mm frame designed for installation in industrial control and measurement panels.
The PSA020OK723S has an IP54 protection rating, providing protection against dust ingress and water splashes from any direction.
EMAS PSA series cam switches provide reliable rotary switching for industrial control, measurement and electrical distribution applications, combining compact panel mounting with dependable long-life contacts.
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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...