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EMAS PSA120MS335S EMAS 120 A 3 POLES STAR DELTA CAM SWIT.(O-Y-U) 60
EMAS PSA120MS335S 120 A three-phase star-delta rotary cam switch designed for industrial motor control and electrical automation applications.
£159.48
Why Choose the EMAS PSA120MS335S Star-Delta Cam Switch?
The EMAS PSA120MS335S is a robust and reliable rotary cam switch designed for manual star-delta motor starting control in three-phase industrial applications. As part of the trusted EMAS PSA Series cam switch range, it provides dependable switching performance for motor control panels, machinery and electrical automation systems.
This switch is engineered for high-performance industrial switching applications, offering precise rotary operation, long mechanical life and a compact panel-mounted design. The star-delta switching configuration allows controlled motor starting by reducing initial starting current and improving the operation of three-phase motors.
With a rated current of 120 A and a three-phase star-delta (O-Y-U) switching configuration, the PSA120MS335S is suitable for larger industrial motors, control cabinets and machinery requiring reliable manual motor starting solutions. Its 85 × 85 mm mounting format enables straightforward integration into electrical panels.
Key Advantages
- Heavy-duty rotary cam switch designed for industrial motor control.
- 120 A current rating suitable for high-power three-phase motor applications.
- Star-delta (O-Y-U) switching function for controlled motor starting.
- Reliable manual operation with long service life.
- Compact 85 × 85 mm panel mounting design.
- Suitable for industrial machinery, automation systems and electrical control panels.
Key Features
- EMAS PSA Series rotary cam switch.
- 120 A rated operational current.
- Three-phase star-delta motor starting configuration.
- O-Y-U switching positions.
- 60° switching angle.
- 85 × 85 mm frame size for panel mounting.
- High mechanical durability for industrial environments.
- Suitable for manual motor control applications.
Reliable Motor Control for Industrial Applications
The EMAS PSA120MS335S provides a dependable manual solution for controlling star-delta motor starting sequences. By switching between star and delta configurations, it helps reduce motor starting current while supporting smooth operation of three-phase induction motors.
Designed for industrial electricians, machine builders and automation engineers, the PSA Series combines compact construction with reliable switching performance. Its durable contacts and enclosed design make it suitable for demanding control panel environments.
Typical Applications
- Industrial motor control panels.
- Star-delta motor starter assemblies.
- Manufacturing machinery.
- Pumps and industrial equipment.
- Automation and electrical control systems.
- Heavy-duty three-phase motor applications.
Technical Specifications
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| Product Series | Emas PSA Series | |
|---|---|---|
| Device Type | Cam Switch | |
| IP Rating | IP54 | |
| Manufacturer | EMAS | |
| Series | PSA Series | |
| Model | PSA120MS335S | |
| Product type | Rotary cam switch | |
| Switch type | Star-delta | |
| Rated current (Ie) | 120 A | |
| Input phases | 3-phase | |
| Switching positions | O-Y-U | |
| Switching angle | 60° | |
| Frame size | 85 × 85 mm | |
| Protection rating | IP54 | |
| Insulation voltage (Ui) | 690 V | |
| Impulse withstand voltage (Uimp) | 4 kV | |
| Usage category | AC21A | |
| Mechanical life | minimum 100,000 operations | |
| Electrical life | minimum 50,000 operations | |
| Operating temperature | -25 to +80 °C |
Frequently Asked Questions
What is the EMAS PSA120MS335S used for?
The EMAS PSA120MS335S is used for manual star-delta switching control of three-phase motors in industrial applications.
What is the current rating of this cam switch?
The switch has a rated current of 120 A.
What type of switching function does the PSA120MS335S provide?
The PSA120MS335S provides a star-delta (O-Y-U) switching function for three-phase motor starting applications.
What is the protection rating of this switch?
The switch has an IP54 protection rating, suitable for industrial control panel environments.
Where is this cam switch typically installed?
The PSA120MS335S is typically installed in electrical control panels and machinery systems requiring manual motor control.
Trusted by Industrial Control Engineers
EMAS PSA Series cam switches are widely used in industrial automation and motor control applications where reliable switching, durability and straightforward panel integration are required.
