Home – Static Transfer Switch
PMI Static Transfer Switches provide seamless and automatic transfer between independent power sources. Controlled by a microprocessor-based system, the STS continuously monitors input sources and transfers the load within |
milliseconds to maintain uninterrupted supply for critical applications.
| STATIC TRANSFER SWITCH | |
|---|---|
| Topology | Thyristor controlled transfer switch |
| Nominal Voltage | 220/230/240 VAC 1 Phase 380/400/415 VAC 3 Phase |
| Nominal Frequency | 50Hz / 60 Hz |
| Overloading Capacity | |
| between 100% – 125% | 10 min. |
| between %125 – 150% | 5 sec. |
| Transfer Management | Make before break |
| Synchronous Transfer Time | < 5 msec. (¼ cycle at 50 Hz) |
| Asynchronous Transfer Time | < 11 msec. |
| Other Controlled Transfers | 0 msec. |
| Efficiency | >99% |
| Protection | Over temperature Protection, MCB Protection at Source Inputs, Overvoltage Protection at Source Inputs |
| Front Panel Indications and Warnings | Synchronization Failure (Light), Asynchronous Transfer Enabled (Light), Prioritized Source Preference (Light), Input Source Fault (Light and Sound), Over current (Light and Sound), Over temperature (Light and Sound), Thyristor Failure (Light and Sound) |
| Buttons | “Asynchronous Transfer Enable” Button, “Manual Transfer Enable” Button, “Reset” Button |
| SAFETY & ENVIRONMENT | |
|---|---|
| Protection Level / Color | IP 20 / RAL 7035 (Standard), (Higher IP rating and different colors are available, please consult) |
| Enclosure Material | Mild Steel, Zinc-phosphate coated; 100 µm electrostatic paint; 1.5 mm thickness |
| Cooling | Forced Fan (Standard) / Natural (OPTIONAL) |
| Cable Entry | Bottom (Standard) / Top (OPTIONAL) |
| Operating Temperature | -10 / +40 °C (Higher operating temperatures are available, please consult) |
| Relative Humidity | 0 – 90% (Higher relative humidity available upon request) |
| Operating Altitude | Max. 1000 m (Higher altitudes require de-rating, please consult) |
From design to commissioning, we deliver dependable power electronics for critical systems worldwide.
PMI designs and manufactures reliable power electronics solutions for critical industrial applications, delivering quality, safety, and long-term performance worldwide.
