Product Overview
The LayerZero eSTS Static Transfer Switch is a safe and reliable solution for ensuring uninterrupted power supply in critical applications. Designed to seamlessly transfer power between multiple sources, it provides enhanced reliability and protection for sensitive equipment.
With its advanced features and robust construction, the eSTS Static Transfer Switch offers seamless switching between power sources, minimizing downtime and preventing disruptions. It incorporates advanced power monitoring capabilities, allowing for real-time monitoring of voltage, frequency, and power quality.
The eSTS Static Transfer Switch is built with safety and reliability in mind, featuring built-in redundancy, inrush mitigation, and fast transfer times. It is designed for easy installation and maintenance, offering a compact design and user-friendly interface for seamless operation and configuration.
Product Specifications
| Physical Specifications | |
| Weight | 2150 lbs [975 kg] |
| Dimensions | 80" x 57" x 36" (2040 mm x 1146 mm x 920 mm) |
| Clearances Clearances are the required physical spacing or distance maintained between the STS unit and other nearby objects or components to ensure proper ventilation, accessibility, and safety. | Front: 42" (1070 mm) Rear: 0" Sides: 0" Top: 18" (460 mm) |
| Heat Dissipation Heat dissipation in static transfer switches is the process of removing heat from the switch's internal components to prevent overheating and damage. The amount of heat dissipation required is typically measured in British thermal units per hour (Btu/hr). | 11,500 Btu/Hr |
| Color The color of the powder coated paint. | Light Gray, Black |
| Presence of Redundant Fans Redundant fans help to ensure that the STS will continue to operate even if one fan fails (> 1200 A systems only). | No - fan-less/convection-cooled |
| Warranty | One-Year Limited Warranty |
| Cable Access Cable access refers to the entry points within the STS unit to allow the installation, routing, and connection of customer connections. Values can be top, bottom, or both. | |
| Incoming Feeder Cables | Top and Bottom Entry |
| Outgoing Load Cables | Bottom Only Exit |
| Electrical Specifications | |
| CSA Rating The CSA rating indicates compliance with safety and performance standards set by the Canadian Standards Association. | Please contact LayerZero Engineering |
| UL Rating The UL rating signifies compliance with safety standards established by Underwriters Laboratories (UL). | Please contact LayerZero Engineering |
| Withstand Ratings The withstand rating in kVA for an STS represents its maximum power capacity to handle loads without exceeding operational limits. | 65kA |
| eSTS Voltage eSTS Voltage is the voltage that is applied to the static transfer switch (STS) when it is in the energized state. | 480V |
| eSTS Current eSTS Current is the current that flows through the static transfer switch (STS) when it is in the energized state. | 800A |
| eSTS Number of Sources The eSTS Number of Sources parameter specifies the number of input power sources that the eSTS can handle. The eSTS can support 2 or 3 input power sources. | 3 |
| Number of Output CBs A redundant output serves as a backup in case the primary output circuit experiences a failure. | 2 |
| eSTS Redundancy STS redundancy can be achieved through either Single Modular Redundancy (SMR) or Triple Modular Redundancy (TMR). | SMR |
| eSTS Number of Wires | 3 |
| eSTS Number of Poles | 3 |
| eSTS Frequency | 60Hz |
| Options | |
| Triple Modular Redundancy (TMR) | Optional (Single Modular Redundancy is standard) |
| INSIGHT IR Cameras | Optional (INSIGHT IR Portholes are standard) |
| Extended Warranty | Optional (Please contact LayerZero Sales) |
Documents and Downloads
A one line diagram is a symbolic representation of three-phase electric power systems, depicting the paths for power flow between entities of the power distribution system.
One Line
A product outline is a technical engineering drawing showing mechanical characteristics of our products.
Product Outline
Guideform specifications include the requirements, specifications, and considerations of installing LayerZero equipment.
Guideform Specification
Safety Features
The LayerZero eSTS is designed for maximum operator safety. It uses a sectionalized design, which means that the power quality monitoring and SCRs are housed in a separate cabinet from the circuit breakers and customer cable connections. This compartmentalized design allows the equipment to be safely operated and serviced.
In normal operation, the inner dead-front doors of the eSTS remain closed. A mechanical interlock is built into the door, which prevents the bypass procedure from being initiated accidentally. This helps to eliminate human error and ensure the safety of operators.
A polycarbonate window in the door allows operators to safely view the status LEDs in the control section without opening the door. INSIGHT IR® cameras (optional) or IR Ports (standard) provide the ability to monitor the temperatures of critical connections with the doors safely closed.
The LayerZero Power Systems eSTS is a safe and reliable piece of equipment that is designed to protect operators and equipment.
Reliability Features
The LayerZero eSTS Static Transfer Switch is designed with internal redundancy to ensure maximum reliability. Every logical machine segment of the eSTS is powered with triple redundant power supplies, which eliminates the risk of signal interference. Control communications utilize fiber optic signals to further maximize system reliability.
The 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, each source has built-in triple redundancy of processors, and every phase is controlled with a separate gate drive board. This unique topology ensures that 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, the eSTS offers Triple Modular Redundant (TMR) architecture. In TMR systems, all components are triple redundant, 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.
Power Quality Monitoring Features
The LayerZero eSTS is equipped with an advanced Power Quality Monitoring (PQM) system that provides local and remote access using non-proprietary protocols. The PQM system includes basic monitoring, alarms, waveform capture, and ITIC plotting capabilities.
The ITIC plotting utility is used to audit the quality of transfers. Systems can be configured to automatically email users waveform captures as an attachment. This ensures that users are notified of events as they happen, without having to manually check for waveform captures.
Connectivity Features
- Ethernet Connectivity: This port is used to connect to a network.
- Modbus/TCP: This protocol is used to communicate with BMS systems.
- NTP Time Clock Synchronization: This protocol is used to synchronize the switch's clock with an external time source.
- SNMP Connectivity: This protocol is used to manage the switch remotely.
eSTS Gallery
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