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3000 A 277/480 V 4-Pole eSTS
Static Transfer Switch

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.

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Product Outline

Guideform specifications include the requirements, specifications, and considerations of installing LayerZero equipment.

Guideform Specification

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Product Brochure

Product Specifications

Product Specifications

Physical Specifications

Weight 11,200 lbs [5080kg]
Dimensions 89" x 192" x 57" (2263 mm x 4883 mm x 1448 mm)
Clearances FRONT: 42 IN. [1067] REAR: 42 IN. [1067] SIDES: 4 IN. [101] TOP: 18IN. [457]
Heat Dissipation Please contact LayerZero engineering
Color Light Gray, Black
Warranty One-Year Limited Warranty
INSIGHT IR Cameras Optional (INSIGHT IR Portholes are standard)
Extended Warranty Optional (Please contact LayerZero Sales)

Static Transfer Switch Configuration

Voltage 277/480
Current 3000
Number of Sources 2
Number of Output CBs 2
Redundancy SMR
Number of Wires 4
Number of Poles 4
Frequency 60
Withstand 65
Presence of Redundant Fans Yes
Incoming Feeder Cables Top and Bottom Entry
Outgoing Load Cables Top and Bottom Exit

Circuit Breaker Configuration

Frame Rating 3000
Circuit Breaker Type Molded Case Switch
Circuit Breaker Mounting Type Fixed
Max Steady State Rating N/A
Percent Rating 100
Fault Rating at Rated Voltage 125kA @ 480VAC
Presence of Shunt Trip No
Presence of CB Position Indications Yes - monitored internally
Presence of Lockout/Tag-out Bracket No
Number of Poles 4
Supplier ABB

Surge Protective Device Configuration

Voltage 277/480
Number of Wires 4
Type Type 2 SPD
Surge Withstand 40
Presence of Alarm Indication Yes - monitored internally

Safety Features

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

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

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

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.

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