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Thomson TS920 Auto Transfer Switch (3Ph, 200A)


SKU: TS923A0200A Category Tag Brand:
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Free Shipping in the Continental United States
Please call for orders to Alaska or Hawaii.

This Thomson TS 920 Automatic Transfer Switch is perfect for three phase commercial applications up to 200A. Indoor or outdoor enclosure. Not Service Entrance Rated – requires an upstream main circuit breaker or similar device for utility and generator sources.

Power Contactor Switching Units

  • 100% Continuous Current Ratings for use with all load types
  • Suitable for Copper and Aluminum power cable connections
  • High Short Circuit Withstand Ratings when used with upstream molded case circuit breakers

Reliable Solenoid Operated Transfer Mechanism

  • Fast Operation allows In-Phase Power Transfer
  • Electrical and Mechanical Interlocked mechanism prevents simultaneous closure of Utility and Generator sources


  • Plug-in Control Devices allow quick connections
  • Enclosed Power Contacts for safe operation and maintenance


  • NEMA 1 Indoor or NEMA 3R Outdoor
  • Rust resistant aluminum, Powder coated

Quality Assurance

  • ISO 9001 Registered Manufacturing Facilities
  • Complies with NEMA & UL50; UL 508; IEEE C62.41, C37.90.1; FCC CFR 47 Part 15, Class B; IEC EN 61000 Electromagnetic Capability

Safety Standards

  • UL 1008 Listed Automatic Transfer Switches for use in legally required Emergency Systems

Control Features

  • New/Advanced TSC 9 Series Transfer Controller with features specifically designed for Commercial ATS applications. User programmable timers, Simple LED interface
  • Normal Operation Status LED Lights: Load on Utility & Load on Generator, Utility & Generator Source Available, Engine Start Activated, Load Shed Activated
  • Diagnostic LEDs: System OK, Alarm, Wait For Transfer, Diagnostic
  • USB Port Factory Programming/Diagnostic
  • Voltage sensing on Utility & Generator
  • Generator AC frequency sensing
  • Utility under voltage control set point 70% dropout (fixed)
  • Generator Set points: under voltage 70% dropout (fixed), under frequency 90% pick-up (fixed)
  • Engine warm-up timer (Selectable 3 sec, 10 sec, 30 sec, 60 sec)
  • Utility return timer (Selectable 3 sec, 10 sec, 60 sec, 120 sec)
  • Engine start timer (Selectable 3 sec, 6 sec, 10 sec)
  • Engine cool down timer (Selectable 3, 60, 120, 300 sec)
  • Integrated Programmable Generator Exercise Timer with easy to configure 7, 14 or 28 day, On-load or Off-load Programmability, initiate pushbutton & light
  • Local utility power fail simulation test pushbutton & LED, front faceplate mounted
  • Engine start contact (5A, 120/240VAC resistive max.) for 2-wire start generators (optional Universal Generator Interface Kit also available)
  • Load Shed contact (5A, 120/240VAC resistive max) for optional automatic load shedding of selected non-essential loads when power source is switched to the generator. (Optional Load Shed Control Kits are also available)
  • Alarm Output (100ma, 24Vdc)


TS920 Brochure

TS920 Quick Start Guide

TS920 Manual

TS920 Warranty


Please see the Accessories Tab for more information and to order.

  • Enclosure Heater Kit
  • Surge Protection Device
  • KW Load Shed Control Kit
  • Universal Generator Interface Start Kit
Model Number






Withstand Rating @ 240VAC


Cabinet Type

Service Entrance Rated

Engine Start Contacts

Full Dimensions HxWxD (inches)


Limited Warranty


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