THOMSON TS 840 Service Manual
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THOMSON TS 840 Service Manual

Automatic transfer switches
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TS 840
AUTOMATIC TRANSFER SWITCHES
INSTALLATION, OPERATING &
SERVICE MANUAL
PM057 Rev 8 10/01/25
th
Street, Langley, BC Canada V1M 3B1 Ÿ Telephone (604) 888-0110
9087A – 198
Telefax (604) 888-3381 Ÿ E-Mail: info@thomsontechnology.com Ÿ www.thomsontechnology.com

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  • Page 1 TS 840 AUTOMATIC TRANSFER SWITCHES INSTALLATION, OPERATING & SERVICE MANUAL PM057 Rev 8 10/01/25 Street, Langley, BC Canada V1M 3B1 Ÿ Telephone (604) 888-0110 9087A – 198 Telefax (604) 888-3381 Ÿ E-Mail: info@thomsontechnology.com Ÿ www.thomsontechnology.com...

  • Page 3: Table Of Contents

    OVER CURRENT PROTECTION 6.1. STANDARD TS 840 AUTOMATIC TRANSFER SWITCH 6.2. OPTIONAL TS 840 AUTOMATIC TRANSFER SWITCH WITH INTEGRAL OVER CURRENT PROTECTION GENERAL NOTES ON SERVICING TRANSFER SWITCH MECHANISM TRANSFER SWITCH MECHANISM OPERATION– 100A-800A, S STYLE PM057 REV 8 10/01/25...
  • Page 4 TS 840 TRANSFER SWITCH 8.1. MANUAL OPERATION RECOMMENDED MAINTENANCE 10. FRONT VIEW (TYPICAL) 3 POLE 100A-250A S-STYLE TRANSFER MECHANISM23 11. FRONT VIEW (TYPICAL) 3 POLE 400A-800A S-STYLE TRANSFER MECHANISM (MECHANISM FRONT COVER REMOVED) 12. FRONT VIEW (TYPICAL) 3 POLE 400A-800A S-STYLE TRANSFER MECHANISM25 13.

  • Page 5: Product Revision History

    NOTE: All information contained in this manual is for reference only and is subject to change without notice. EQUIPMENT STORAGE The following procedures are required for correct storage of the transfer switch prior to installation. 2.1. ENVIRONMENTAL CONDITIONS CAUTION!!! Failure to store and operate equipment under the specified environmental conditions may cause equipment damage and void warranty.

  • Page 6: Notes To Installer

    2.1.1. EQUIPMENT STORAGE The transfer switch shall be stored in an environment with a temperature range not exceeding -4° to +158° Fahrenheit (-20° to +70° Celsius) and a humidity range not exceeding 5%-95% non-condensing. Before storing, unpack sufficiently to check for concealed damage.

  • Page 7: Transfer Switches With Integral Over Current Protection

    For models of transfer switch with integral over current protection, the over current protection must be set prior to operation. The equipment will be shipped from the factory with a long-time current setting of 100% (of the equipment rating) and maximum short- time/instantaneous current and time delay settings.

  • Page 8: System Phasing-High Leg Delta Systems

    TS 840 TRANSFER SWITCH 3.3. SYSTEM PHASING-HIGH LEG DELTA SYSTEMS For systems using high leg delta 240V 3 phase 4 wire systems, connection of supply conductors must have the correct phasing as shown below. WARNING Failure match correct system phasing will result in serious damage to the TSC 80 controller.

  • Page 9: Remote Start Contact Field Wiring

    (A Phase for both supplies). Failure to do so will result in equipment damage.
  • Page 10 "Standard" enclosures are all transfer switch enclosures Thomson Technology offers in NEMA 1, NEMA 2, NEMA 3R and NEMA 4X for the above listed product. If a customer requests a custom enclosure it would not be covered under the generic certificate;...
  • Page 11 TS 840 TRANSFER SWITCH Anchoring Notes: 1. Anchoring must be designed according to IBC 2006 or latest version. PM057 REV 8 10/01/25 Thomson Technology...

  • Page 12: General Description

    The TSC 80 controller is mounted on the door of the transfer switch enclosure and operating status is shown via LED lights. For further information on the TSC 80 Transfer Controller, refer to separate instruction manual PM063.
  • Page 13 TS 840 TRANSFER SWITCH transfer controller provides a standard neutral position delay timer to allow adequate voltage decay during transfer operation to prevent out of phase transfers. Note: For the purpose of this manual, the following standard nomenclature is utilized:...

  • Page 14: Product Model Code

    4.1. PRODUCT MODEL CODE The type of TS 840 series transfer switch supplied is identified by way of a 21 digit product code which appears on the equipment rating plate (MODEL) on the door of the transfer switch, and on the transfer switch drawings. The model code structure and definitions are as follows: 1-3.

  • Page 15: Typical Commissioning Procedures

    When utility supply voltage drops below a preset nominal value (adjustable from 70% to 100% of nominal) on any phase, an engine start delay circuit is initiated and the transfer to utility supply signal will be removed (i.e. contact opening). Following expiry of the engine start delay period (adjustable from 0 to 60 sec.) an engine start...

  • Page 16: Service Entrance Automatic Transfer Switch

    The retransfer sequence is completed as follows: when the utility supply voltage is restored to above the preset values (adjustable from 70% to 95% of nominal) on all phases, a transfer return delay circuit will be initiated. Following expiry of the Utility Return Timer (adjustable from 0 to 30 min.), the Transfer to Generator Supply signal...
  • Page 17 TS 840 TRANSFER SWITCH of the load to the generator supply. The utility source will be locked out and the load will remain on the generator supply until the TSC 80 alarm signal is manually reset. Refer to the TSC 80 Instruction Manual for further details on Transfer Fail operation.
  • Page 18 Personal Protective Equipment (PPE). Failure to do so may cause personal injury or death 1. Open the door to the transfer switch using a suitable tool and opening the door lock with the key.
  • Page 19 If the position of the transfer switch mechanism is not in the "neutral position", manually operate the transfer switch mechanism by inserting...

  • Page 20: Test Modes

    Note: The transfer switch will automatically return to the utility supply (if within nominal limits) if the generator set fails while in the test mode.
  • Page 21 TS 840 TRANSFER SWITCH An upstream over current protection device is required on the generator source which feeds the TS 840 Transfer Switch if integral over current protection option is not specified on the ATS. Note: For models of transfer switch with adjustable integral over current protection trip units, the over current protection must be set prior to operation.

  • Page 22: General Notes On Servicing Transfer Switch Mechanism

    This equipment must be installed and serviced only by qualified electrical personnel utilizing safe work practices and appropriate Personal Protective Equipment (PPE). Failure to do so may cause personal injury or death When performing any service work on the transfer mechanism, it is imperative that the following be observed: 7.1.
  • Page 23 TS 840 TRANSFER SWITCH testing must be done prior to placing a transfer switch in service subsequent to any maintenance or repair. Any service work involving electrical components requires high- potential testing to ensure that required insulation levels have been maintained.

  • Page 24: Transfer Switch Mechanism Operation- 100A-800A, S Style

    The power switching device toggles are set inside the operating arm slots and are moved by them. There are two limit switches, which are contacted by the operating arms (one for each power switching device), which disconnect the transfer motor power supply when the power switching devices have attained full travel.
  • Page 25 TS 840 TRANSFER SWITCH Automatic operation may be regained by replacing the control circuit isolation plug. With all sources of power de-energized to the transfer switch, the control circuit isolation plug can be re-connected. The drive system will operate the transfer switch to the required position.

  • Page 26: Recommended Maintenance

    10.6. Verify all program settings on the TSC 80 controller as per the TSC 80 component calibration label inside the transfer switch enclosure. 10.7. Use high viscosity moly lubricant for lubrication of the drive hub/operator arm interface.
  • Page 27 TS 840 TRANSFER SWITCH FRONT VIEW (TYPICAL) 3 POLE 100A-250A S-Style TRANSFER MECHANISM PM057 REV 8 10/01/25 Thomson Technology...

  • Page 28: Front View (Typical) 3 Pole 400A-800A S-Style Transfer Mechanism (Mechanism Front Cover Removed)

    TS 840 TRANSFER SWITCH FRONT VIEW (TYPICAL) 3 POLE 400A-800A S-Style TRANSFER MECHANISM (Mechanism Front Cover Removed) ØC ØB ØA ØA ØB ØC ØA ØB ØC CUSTOMER ORDER No. WORK ORDER No. DWN BY AUTH BY DATE DRAWING/FILE No. SHEET...

  • Page 29: Front View (Typical) 3 Pole 400A-800A S-Style Transfer Mechanism25

    TS 840 TRANSFER SWITCH FRONT VIEW (TYPICAL) 3 POLE 400A-800A S-Style TRANSFER MECHANISM PM057 REV 8 10/01/25 Thomson Technology...

  • Page 30: Cable Terminal Information

    For other model types not shown, contact Thomson Technology for further information. Fuse ratings shown are maximum allowable to permit use of the transfer switch in application with available fault current not exceeding that shown. Consideration must be given to fuse sizing when fuses also provide overload protection.

  • Page 31: Interrupting Capacity Current Ratings (All Models With Integral Overcurrent Protection Option)

    Per NEC and UL1008, a ground fault protected system shall be performance tested when first installed on site. A written record of this shall be made and be available to the authority having jurisdiction. A form is provided at the back of this manual for this purpose – see Section 21.
  • Page 32 The use of high-voltage testers and resistance bridges may be required. A simulated fault current is to be generated by a coil around the sensors. The reaction of the circuit-interrupting device is to be observed for correct response.

  • Page 33: Troubleshooting

    Personal Protective Equipment (PPE). Failure to do so may cause personal injury or death Note: An optional hand held, plug-in Service Display Module (SDM) is available for the TSC 80 Transfer Controller. The SDM module provides an LCD screen to display additional detailed information on the operation and settings of the TSC 80 controller for simplified servicing/trouble shooting procedures.
  • Page 34 Power is not available at the load - The power switching device's over current protection unit has opened due to a fault on the system. Correct the fault, and terminals but the utility or generator manually reset the power switching device in the transfer...

  • Page 35: Replacement Parts

    NOTE There are no user serviceable components located on the TSC 80 printed circuit board. If the TSC 80 controller is deemed to be defective it must be returned to the Thomson Technology Factory for repair or replacement. Please refer to Product Return Policy section of this manual further information on product return procedures required.

  • Page 36: Product Return Policy

    Returns only: Sales Fax (604) 888-5606 Warranty replacement/Warranty Repair: Service Fax (604) 888-3370. Upon receipt of your request, Thomson Technology will confirm with a copy of our Order Acknowledgement via fax advising the RMA number which should be used to tag the defective controller prior to shipment.

  • Page 37: Notes

    TS 840 TRANSFER SWITCH NOTES PM057 REV 8 10/01/25 Thomson Technology...

  • Page 38: Performance Test Form

    TS 840 TRANSFER SWITCH PERFORMANCE TEST FORM This form should be retained by those in charge of the building electrical installation in order to be available to the authority having jurisdiction. Date Personnel Tests performed Comments Interconnection evaluation Grounding point evaluation...
  • Page 39 Pre-Commissioning Checks Prior to Commissioning Agent On-Site (to allow loads to be supplied prior to final commissioning) 1) Verify the system voltage of both sources (i.e. generator and utility) to be applied to the transfer switch are of the correct nominal system value which matches the ATS drawings and the ATS equipment label ratings.
  • Page 40 FAILURE TO OBTAIN THE CORRECT ATS PHASING WILL RESULT IN EQUIPMENT MALFUNCTION AND DAMAGE. 3) Confirm cable size is correct for the lugs supplied in the transfer switch (line and load). Confirm the cables were meggered by the electrical contractor to ensure no cross phase connections or conduction to ground.
  • Page 41 2 push buttons on the TSC 80 faceplate simultaneously “ON” until all the LED’s change state). 10) Prior to operating the generator, ensure it is ready to be energized and the site electrical contractor and/or owner (as required) give authorization to proceed. In preparation for operation, turn the generator’s engine control switch to the...
  • Page 42 2-minute utility return timer. The engine will be automatically re-tested on load every week (i.e.7 days) at the same time of day that the first test was initiated.
  • Page 43 APPENDIX “B” THOMSON TECHNOLOGY © SEISMIC CERTIFICATE 9087A - 198 Street, Langley, B.C. Canada V1M 3B1 Telephone (604) 888-0110 Telefax (604) 888-3370...

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