If The Power Source Fails, eSTS Transfers
The Series 70: eSTS Static Transfer Switch (STS) switches between two independent power sources in less than a quarter cycle, allowing for uninterrupted power that is ideal for mission-critical and industrial applications. The eSTS features a solid-state transfer switch that automatically or manually provides static transfers between two AC sources. The eSTS provides an extremely high-reliability transfer.
The eSTS performs open-transition transfer in such a manner that the connected load disruption is minimized without ever cross-connecting the power sources. A power source is specified as the preferred source, and if the preferred source fails, the unit will automatically connect to the alternative source until the preferred source is available again.
The eSTS features Triple Modular Redundancy (TMR), fail-safe mechanics, InSight portholes, a touch screen interface, waveform capture, "black box" forensic diagnostics, voice guided bypass, and front-only access. The eSTS line has been developed with an emphasis on reliability, safety, connectivity, and information centricity.
All components of the machine are safely replaceable without the need to de-energize the load.
- Documentation
- Fundamentals
- Product Options
- Reliability
- Safety
- Information Centricity
- Connectivity
Technical Documentation
White Papers
- Circuit Breaker Selective Trip Coordination in 225A and 400A Distribution Panelboards, Anthony Pinkey.
- Double Your Power at the Rack …by Eliminating Inrush for Out-of-Phase Transfers, Milind Bhanoo.
Opinion Papers
- Analysis and Opinion on the Operation of Switch Mode Power Supplies under Switched Voltage Phase Conditions, James M. Galm, Ph.D., P.E.
- A Case For The Omission of Shunt Trips in STS, James M. Galm, Ph.D., P.E.
- On the Inability to Truly Detect Open SCRs on the Inactive Side of Static Transfer Switches, LayerZero Power Systems.
Product Options
All of our products are custom built to exact specifications, fully configurable through our eBOSS portal.
The Series 70 eSTS line offers the following configurations:
| Current | Voltage | Heat Dissipation | Weight | Dimensions |
| 250A | 208V, 4-wire, 60Hz 480V, 3-wire, 60Hz 600V, 3-wire, 60Hz 380V, 4-wire, 50Hz 400V, 4-wire, 50Hz 415V, 4-wire, 50Hz |
4,750 BTU/Hr | 1,350 lbs | 48”W x 36”D x 80”H |
| 400A | 7,000 BTU/Hr | 1,400 lbs | 48”W x 36”D x 80”H | |
| 600A | 9,500 BTU/Hr | 1,500 lbs | 48”W x 36”D x 80”H | |
| 800A | 12,500 BTU/Hr | 1,950 lbs | 58”W x 36”D x 80”H | |
| 1200A | 18,750 BTU/Hr | 2,750 lbs | 71"W x 32"D x 86"H |
Number of CBs: 1, 2
Redundancy:SMR, TMR
Color: Black, White
