Static Transfer Switches
LayerZero Power Systems designs and manufactures Web-Enabled Static Transfer Switches (eSTS) from sizes ranging from 150 Amps to 4000 Amps. LayerZero Static Transfer Switches are the most robust, reliable, and technologically-advanced Static Transfer systems available, integrating Triple Modular Redundancy, Power Quality Monitoring, Remote Connectivity, Dynamic Phase Compensation, in a convection-cooled, safe-to-maintain design.
Providing an automatic and seamless transfer of the critical load, LayerZero Static Transfer Switches keep the power in critical data processing operations always-on. The eSTS Static Transfer Switch transfers power between two or three sources in less than a quarter electrical cycle, maintaining continuity for the critical load from lapses that may be as short as a few electrical cycles long. eSTS protects data centers, mission critical applications, and even entire buildings.
The LayerZero eSTS Static Transfer Switch Maximizes Power Reliability
The LayerZero eSTS is designed to transfer power between two or three input power sources without interrupting the critical load. The LayerZero eSTS requires two or three input power sources (Preferred Source + Secondary Source) and outputs to one power source. Made to protect mission-critical applications, eSTS is the last line of defence against power outages. eSTS monitors the power quality, and if a source goes out of specification, eSTS automatically transfers from the Preferred to the Secondary source. LayerZero's eSTS Static Transfer Switch requires no moving parts, and utilizes Silicon Controlled Rectifiers (SCRs) to transfer between sources. Transfers are very fast, less than 1/4 of an electrical cycle.
eSTS Is Designed for Operator Safety
For maximum operator safety, the LayerZero eSTS utilizes a sectionalized design, housing the power quality monitoring and SCRs in a cabinet adjacent to the circuit breakers and customer cable connections. The sectionalized compartment design of the eSTS allows the equipment to be safely operated and serviced. In normal operation of the eSTS, the inner dead-front doors remain closed. A mechanical interlock is built into the door, permitting safe operation of the bypass procedure by eliminating human error. A polycarbonate window allows for status LEDs in the control section to be safely viewed with the door closed. INSIGHT IR® cameras (optional) or IR Ports (standard) provide the ability to monitor the temperatures of critical connections with the doors safely closed.
eSTS is Designed For Low Maintenance
The eSTS has been designed to be accessible from the front-only, there is no need to ever access difficult-to-reach locations. Input/output terminals can be accessed from the front/bottom of the equipment. The buswork of LayerZero eSTS systems is epoxy coated for additional operator safety and connections are silver plated for reliability. Internal connections are permanently brazed and are maintenance-free.
eSTS Is Designed with Fail-safe Topology For Maximum Reliability
The LayerZero eSTS Static Transfer Switch is designed with internal redundancy, every logical machine segment of the eSTS Static Transfer Switch is powered with triple redundant power supplies. To eliminate the risk of signal interferance and to maximize system reliability, control communications utilize fiber optic signals.
LayerZero eSTS is equipped standard with Single Module Redundancy (SMR), a cost-effective topology that provides redundant power paths to mission-critical equipment. In SMR systems, sources each have built-in triple redundancy of processors, and every phase is controlled with a separate gate drive board. LayerZero Single Modular Redundant topology is unique that it the system is fail-safe, maintaining full switching functionality even if a critical board were to fail.
For applications where reliability simply cannot be compromised, eSTS offers Trip le Modular Redundant (TMR) architecture, so that a failure of any component on any board will not compromise the critical load. With appropriate and timely service and maintenance an eSTS TMR system will maintain virtually 100% probability of mission success.
eSTS Has Innovative Technologies for Maximum Availability
Operator error during maintenance bypass has been known to be a reliability hazard. In order to minimize the possibility of operator error during equipment bypass operations, LayerZero provides:
eSTS Eliminates Transformer Inrush
The LayerZero eSTS eliminates downstream inrush by incorporating a patented “Dynamic Phase Compensation” algorithm that intelligently introduces an appropriate time delay at the instant of transfer. LayerZero provides an ITIC Plotting tool to audit the quality of transfers, to ensure that transfer times stay within the limits of ITIC curve parameters.
Highly Connected Systems Designed for Direct Access to Information
INSIGHT IR® is a thermal monitoring system for LayerZero Power Systems products, designed to continuously monitor the temperatures of critical components. INSIGHT IR® captures data from a network of fixed infrared cameras and continuously looks for abnormal changes in thermal conditions. When a problematic connection is detected early, repairs can be made on equipment before the problem leads to downtime.
Every eSTS is equipped with an advanced Power Quality Monitoring (PQM) system equipped with local and remote communications options that are accessible utilizing non-proprietary protocols. LayerZero eSTS Systems include basic monitoring, alarms, Waveform Capture, and ITIC Plotting capabilities. The LayerZero ITIC Plotting utility is used to audit the quality of transfers. In addition, systems can be configured to automatically email users waveform captures as an attachment - so that if an event occurs, users do not have to look for the waveform capture image.
Designed and Tested for Seismic Compliance
The LayerZero eSTS is designed and tested to meet the seismic requirements of critical facilities worldwide. Products are seismic tested on a tri-axial shake table that provides independent motions of different magnitudes in 3 directions. The shake table testing proves how LayerZero equipment will actually respond in the event of an earthquake. Mere seismic paper studies are no substitute for a calibrated shake-table verification. Testing verifies that the mounting bolts remain seated, doors remain closed, mechanically locked critical components do not jam, and all of the controls are fully operational after a seismic event. LayerZero ensures product reliability in earthquake-prone locations by designing and testing equipment on an actual seismic shake table.
eSTS Has A Proven History of Reliability
LayerZero Power Systems has been designing and building Static Transfer Switches since 2001. The LayerZero eSTS is designed to be extremely reliable. LayerZero products are designed, fabricated, and tested in the same location. Our in-house development team has complete control over all processes that contribute to the quality aspects the manufacturing process - including the electrical designs, mechanical designs, and the software. As a result, LayerZero products are innovative, high-quality, and exceptionally reliable.
LayerZero Power Systems is an Innovator in Static Transfer Switch Design
• First Static Transfer Switch with Triple Modular Redundant design
• First Static Transfer Switch with real-time Waveform Capture
• First Static Transfer Switch with Triple Digital Signal Processors
• First Static Transfer Switch with Dynamic Phase Compensation technology for out-of-phase transfers
• First Static Transfer Switch with Voice Guided Bypass Procedure