Series 70: eSTS 150A-800A
Series 70: eSTS 1200A-4000A
Series 70: ePODs™ Type-P
Series 70: ePODs™ Dual Type-P
Series 70: ePODs™ Type-S
Series 70: ePODs™ Type-N
Series 70: ePODs™ Type-X
Series 70: eRPPs
Series 70: ePanel-1
Series 70: ePanel-2
Series 70: ePanel-HD
What is a Static Transfer Switch?
A Static Transfer Switch (eSTS) is able to select between two sources of power, and helps ensure maximum reliability in critical operations. LayerZero Static Transfer Switch products utilize puck-style SCR semiconductors, SCR signaling gate drives, and processing control boards with built in Power Quality Analyzers.
LayerZero TMR-Enabled Static Transfer Switches utilize independent system identification and control strategies, each identifying and controlling the same process. A voting mechanism monitors each signal, and majority vote determines the outcome.
Normally all systems agree. If one of the three control systems disagrees with the other two, it is out-voted, and the disagreement can be monitored and flagged.
If the root-cause of the disagreement is eliminated; then reliability level increases further through "renewal" process. Such designs can increase total system reliability by orders of magnitude. LayerZero Static Transfer Switch products are 10x more reliable than other products when enabled with TMR.
In a Static Transfer Switch, one source is selected as the preferred source, and the critical load is normally powered by the preferred source. A Static Transfer Switch schematic diagram of Source 1 power is shown below.
If Source 1 fails, the system transfers to Source 2. Nominally, the total transfer time of a LayerZero Static Transfer Switch is ¼ electrical cycle. The critical load continues to be powered without interruption. A Static Transfer Switch schmatic diagram of Source 2 power is shown below.
True System Redundancy Maximizes Power Reliability. Learn more about the LayerZero Series 70 eSTS Static Transfer Switch.
