About this file

This file is a detailed technical specification (Attachment J.11) for Static Transfer Switches (STS) for the Federal Aviation Administration (FAA). The document provides comprehensive operational characteristics and technical requirements for STS equipment at 208V and 480V, covering multiple amperage ratings (150A, 250A, 400A, 600A). The specification outlines extensive technical parameters including environmental requirements (temperature, humidity, altitude), switch logic operations, control mechanisms, indicator functions, communication protocols, and physical cabinet configurations.

The specification meticulously details technical specifications across multiple sections, including input/output voltage specifications, frequency requirements, overload capacities, fault clearing capabilities, and performance standards. The solicitation (Number 6973GH-25-R-00121) is for providing STS equipment at National Airspace Systems (NAS) facilities throughout the United States and its territories, with the FAA seeking Commercial Off-The-Shelf/Non-Developmental Items. The contractor will be required to provide equipment, engineering support, logistics, maintenance/operator training, spares provisioning, and comprehensive documentation to support the STS acquisition.

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Text version

J.07

Attachment J.1 STS Equipment Specification ReferenceSpecification SectionCompliance Review DesignationExplanation of "D" Deviations, "E" Exceptions and “S” SurpassesAssociated Supported Reference for "C", "D", "E", "S"Associated Supported Reference Page Number For "C", "D", "E", "S"
"C", "D", "E", "S"
1.3Environment Requirements
1.3.1Storage Temperature
1.3.2Operating Temperature
1.3.3Relative Humidity
1.3.4Operating Altitude
1.3.5Audible Noise
1.3.6Magnetic Fields
1.3.7Seismic
1.3.8Radio Frequency (RF) Field
2.1General Requirements for all Static Transfer Switches (STS)
2.1.1Switch Logic Operation
2.1.1.1Input Selection
2.1.1.2Voltage Sensing
2.1.1.3Transfer Time
2.1.1.4Current Sensing
2.1.1.5Handling of Fault Conditions
2.1.1.6Phase and Neutral Transfer Requirements
2.1.1.7Measurement, Decision and Action Circuitry
2.1.1.8Set Point Accessibility
2.1.1.9Adjustments
2.1.1.9.1Phase Angle Difference
2.1.1.9.2Overvoltage
2.1.1.9.3Undervoltage (Below the Desired Value)
2.1.1.9.4Undervoltage (Below the Usable Value)
2.1.1.9.5Overload for Source
2.1.1.9.6Overload (Failed/Shorted Load)
2.1.1.9.7Frequency Detection
2.1.1.9.8Re-Transfer Time
2.1.1.9.9Out of Phase Trasnfer Delay
2.1.2Controls
2.1.2.1Lamp Test
2.1.2.2Reset Fault Control
2.1.2.3Source Selector for Source 1
2.1.2.4Source Selector for Source 2
2.1.2.5Auto Retransfer Selector
2.1.2.6Control Enable Key Switch
2.1.2.7Reset (Main or Master)
2.1.2.8Alarm Silence Switch
2.1.3Indicators
2.1.3.1Indicator Functions
2.1.3.1.1Switch not OK
2.1.3.1.2Availability of Source 1 Input
2.1.3.1.3Availability of Source 2 Input
2.1.3.1.4Load Source 1
2.1.3.1.5Load Source 2
2.1.3.1.6Source 1 is Preferred
2.1.3.1.7Source 2 is Preferred
2.1.3.1.8Retransfer Enabled Indicator
2.1.3.1.9Retransfer Enabled Off Indicator
2.1.3.1.10Critical Load Powered Up
2.1.3.2Indicator Conditional Response
2.1.3.2.1Source Annunicated
2.1.3.2.2System Conditions Annunicated
2.1.4Communications
2.1.4.1Modbus RTU
2.1.4.3Auxiliary Contacts
2.1.4.4Time
2.1.4.5Shunt Trip Capability
2.1.5Cooling Requirements
2.1.5.1Cooling Media
2.1.5.2Fans
2.1.5.3Filters
2.1.5.4Over Temperature Detection
2.1.5.5Convecting Cooling
2.2.3Static Transfer Switch (STS), 208 Volt, 3-pole/4-pole, 150 Amp, 250 Amp, 400 Amp, 600 Amp, with Bypass Cabinet, Free Standing
2.2.3.1Free Standing Cabinet Physical Requirements
2.2.3.1.1Static Transfer Switch with Integral Bypass Cabinet
2.2.3.1.2Mechanical Configuration Requirements
2.2.3.1.2.1Service Access
2.2.3.1.2.2Cable Entry
2.2.3.1.2.4Mean-Time-To-Repair
2.2.3.2.1Inputs
2.2.3.2.1.1Input Voltage
2.2.3.2.1.2Input Voltage Operating Range
2.2.3.2.1.3Input Voltage Connection
2.2.3.2.1.4Neutral Plate Connection
2.2.3.2.1.5Frequency
2.2.3.2.1.6Input Conductor Ratings
2.2.3.2.2Outputs
2.2.3.2.2.1Output Voltage
2.2.3.2.2.2Output Current
2.2.3.2.2.3Overload Capacity
2.2.3.2.2.4Inrush
2.2.3.2.2.5Fault Clearing
2.2.3.2.2.6Voltage Withstand
2.2.3.2.2.7Output Conductor Ratings
2.2.3.2.2.8Performance
2.2.4Static Transfer Switch (STS), 480 Volt, 3-pole/4-pole, 150 Amp, 250 Amp, 400 Amp, 600 Amp, with Bypass Cabinet, Free Standing.
2.2.4.1Free Standing Cabinet Physical Requirements
2.2.4.1.1Static Transfer Switch with Integral Bypass Cabinet
2.2.4.1.2Mechanical Configuration Requirements
2.2.4.1.2.1Service Access
2.2.4.1.2.4Cable Entry
2.2.4.2Electrical Requirements
2.2.4.2.1Inputs
2.2.4.2.1.1Input Voltage
2.2.4.2.1.2Input Voltage Operating Range
2.2.4.2.1.3Input Voltage Connection
2.2.4.2.1.4Neutral Plate Connection
2.2.4.2.1.5Frequency
2.2.4.2.1.6Input Conductor Ratings
2.2.4.2.2Outputs
2.2.4.2.2.1Output Voltage
2.2.4.2.2.2Output Current
2.2.4.2.2.3Overload Capacity
2.2.4.2.2.4Inrush
2.2.4.2.2.5Fault Clearing
2.2.4.2.2.6Voltage Withstand
2.2.4.2.2.7Output Conductor Ratings
2.2.4.2.2.8Performance

ATTACHMENT J.08

EG PERFORMANCE SEPECIFICATION COMPLIANCE

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