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THOMSON TSC 7320 - User Manual

THOMSON TSC 7320
51 pages
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PM180
Rev 0
23/02/10
TSC 7320
TRANSFER SWITCH
CONTROLLER
INSTALLATION, OPERATING &
SERVICE MANUAL
9087A - 198th Street, Langley, BC, Canada V1M 3B1 · Telephone (604) 888-
0110
Email: info@thomsonps.com · www.thomsonps.com

Table of Contents

Questions and Answers

  • E
    elizabethmooreAug 3, 2025
    What to do if my THOMSON TSC 7320 Controller will not transfer to generator source upon failure of utility source?
    • A
      Anthony WattsAug 3, 2025
      If the Thomson Controller doesn't transfer to the generator upon utility failure, several factors could be at play. * First, check if the warm-up time delay function has timed out by verifying the TSC 7320 timer setting. * Ensure the generator set output circuit breaker is closed. * Confirm the generator's voltage and frequency levels are correct and match the TSC 7320 settings. * Also, verify the phase rotation and check all TSC 7320 connectors, especially the generator voltage sensing connection plug. If the issue persists, there may be a ‘Transfer Fail’ alarm activated, a defective ATS mechanism motor, a loose control wire connection, or a defective TSC 7320 controller.
  • A
    Andrew MurphyAug 7, 2025
    What to do if my THOMSON Controller will not re-transfer to utility source upon restoration?
    • Y
      Yesenia BrownAug 7, 2025
      If your Thomson Controller isn't re-transferring to the utility source after power restoration, there are a few things to check. First, make sure the generator side auxiliary switch (G-AUX) n/c contact is closed and has low resistance when the generator switching device is open. Also, check if the TSC 7320 auxiliary switch Digital input for Gen Power Switching Device is Open has been activated. For Service Entrance Rated ATS, ensure the Service Disconnect switch is in the “Energized” or “Transfer to Neutral” position, and the Utility Voltage Disconnect switch inside the ATS is switched to the “On” position.
  • S
    sherri54Aug 15, 2025
    What to do if power is not available at the load terminals on my THOMSON TSC 7320 Controller?
    • B
      Benjamin VaughnAug 16, 2025
      If power isn't available at the load terminals of your Thomson Controller, even when the utility or generator power switching device appears closed, it could be due to a few reasons. The utility or generator power switching device might have tripped open due to an over current condition, so determine the cause of the alarm and rectify it before resetting the TSC 7320. Alternatively, the mechanism might have failed to fully operate the power switching device toggle, or there could be a power switching device aux contact failure. For the latter two, contact Thomson Power system for adjustment procedure or replacement of aux contacts.
  • C
    Curtis WarrenAug 20, 2025
    Why is the motor overheated in my THOMSON TSC 7320 Controller transfer switch?
    • S
      Shannon MartinAug 20, 2025
      If the transfer switch in your Thomson Controller has completed a transfer, but the motor has overheated, it may be due to aux contact failure or improper adjustment. Contact Thomson Power system for adjustment procedure or replacement of aux contacts.
  • B
    Brianna StephensAug 25, 2025
    How to fix no time delay when there should be on THOMSON TSC 7320 Controller?
    • A
      Alicia KeithAug 25, 2025
      If there's no time delay when there should be in your Thomson Controller, it's likely due to an incorrect TSC 7320 time delay setting. Verify the TSC 7320 timer setting.
  • M
    Michaela Wilson MDAug 29, 2025
    What to do if my THOMSON TSC 7320 Controller is not powered from 24Vdc aux supply?
    • K
      Kevin GoodwinAug 29, 2025
      The Thomson TSC 7320 controller requires a constant 24Vdc auxiliary power supply. Ensure the low power buffer module is providing the correct 24Vdc supply to the TSC 7320 controller.
  • M
    Michael BellNov 10, 2025
    Why is there a Utility Return Time (mains transient) delay with my THOMSON TSC 7320?
    • M
      Monique BellNov 10, 2025
      A Utility Return Time delay in your Thomson Controller can occur due to several reasons. It might be because the TSC 7320 time delay setting period hasn't expired yet, so verify the TSC 7320 time delay setting. A Load Test or Exercise Test mode could be active; check the TSC 7320 status screen and LED indicators. Also, the utility supply might not be operating at the correct voltage or frequency levels, or the TSC 7320 might have incorrect utility voltage or frequency settings. Other potential causes include mismatched utility phase rotation, unplugged TSC 7320 voltage sensing connection plugs or ATS Power Chassis & Voltage Sensing Isolation Plugs, a 'Transfer Fail' alarm, a defective utility power switching unit close coil or generator power switching unit trip coil, a defective ATS mecha...

Summary

Introduction to TSC 7320 Controller

Product Revision History

Summarizes changes made to the product since its initial release.

General Description of TSC 7320

Provides an overview of the TSC 7320 controller's architecture and primary functions.

Installation of TSC 7320 Controller

General Installation Information

Outlines general installation guidelines, emphasizing adherence to electrical codes.

Notes for the Installer

Presents critical warnings and considerations for personnel performing installation.

Controller Mounting Procedures

Details the physical mounting procedures and dimensions for the controller unit.

AC Voltage Sensing Input Connections

Explains the connection of AC voltage sensing inputs for various electrical system types.

AC Current Sensing Input Connections

Describes the process of connecting AC current sensing inputs via secondary current transformers.

AC Control Power Input Requirements

Specifies the requirements for AC control power supply and its typical power draw.

Auxiliary DC Control Power Input

Details the provision of 24VDC auxiliary power for continuous operation of features.

Programmable Inputs Overview

Introduces the 16 programmable digital inputs and how they are activated by external contacts.

Programmable Outputs Overview

Outlines the 8 digital and 2 dry contact programmable outputs provided by the controller.

External ATS Control Wiring Guidelines

Provides guidelines for external ATS control wiring, including wire gauge and shielding.

Remote Start Contact Field Wiring

Advises on wiring remote start contacts to prevent electrical interference and ensure reliability.

Communication Cable Installation

Offers guidance on installing communication cables to shield them from electrical interference sources.

Dielectric Testing Precautions

Warns against performing high voltage dielectric testing on the transfer switch with the controller connected.

Description of TSC 7320 Controller Features

Front Panel LED Indicators

Explains the function and indicators of the 12 LEDs located on the controller's front panel.

Controller Input Terminal Connections

Details the terminal connections for the controller's digital and analog inputs.

Controller Output Terminal Connections

Describes the wiring and specifications for the controller's programmable outputs.

ATS Operation Mode Descriptions

Explains the functionality and behavior of the ATS across various operation modes.

Automatic Sequence of Operation

Outlines the steps involved in automatic transfer sequences like open and closed transitions.

Display Page Descriptions and Navigation

Provides an overview of the available display pages and how to navigate them.

Operating Instructions for TSC 7320

Display Screen Navigation Guide

Guides users on navigating the controller's display screens using the front panel buttons.

On Load Test Instructions (Utility Power Fail Simulation)

Step-by-step guide to perform an On Load Test simulating a utility power failure.

Off Load Test Instructions (Generator No Load Test)

Detailed instructions for executing an Off Load Test without generator load.

Open;Closed Transition Transfer Operation

Explains the operational differences between open and closed transition transfer types.

Transfer Fail Alarm Reset Procedure

Procedure for identifying, resolving, and clearing transfer fail alarms on the controller.

Service Disconnect Mode Operation

Details the functionality and usage of the Service Disconnect mode for maintenance safety.

Phase Sequence Protection Alarm Reset

Instructions on how to reset alarms related to incorrect phase sequence detection.

Programming Instructions for TSC 7320

Password Security and Login

Explains the controller's password protection system and the login process for settings.

System Time and Date Adjustment

Provides steps to modify the controller's internal clock and date settings.

Voltage Change Procedure

Details the process of reconfiguring the system voltage settings for the controller.

Exercise Timer Setup Guide

Guides on configuring the built-in calendar-based exercise timer for ATS testing schedules.

Multi-Stage Load Shed Control

Explains how multi-stage load shedding is managed to prevent generator overload.

System Settings Configuration

Covers system settings configurable via input pins, including transition types and operation modes.

Factory Default Programming Settings

TSC 7320 Wiring Pin Connections

Troubleshooting Common Issues

Replacement Parts Information

Product Return Policy

Notes and Documentation

THOMSON TSC 7320 Specifications

General IconGeneral
BrandTHOMSON
ModelTSC 7320
CategoryController
LanguageEnglish

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