User manual THOMSON TS 840

[. . . ] TS 840 AUTOMATIC TRANSFER SWITCHES INSTALLATION, OPERATING & SERVICE MANUAL PM057 Rev 8 10/01/25 9087A ­ 198th Street, Langley, BC Canada V1M 3B1 Y Telephone (604) 888-0110 Telefax (604) 888-3381 Y E-Mail: info@thomsontechnology. com Y www. thomsontechnology. com TS 840 TRANSFER SWITCH TABLE OF CONTENTS 1. PRODUCT REVISION HISTORY EQUIPMENT STORAGE 2. 1. ENVIRONMENTAL CONDITIONS 1 1 1 3. NOTES TO INSTALLER 3. 1. UPSTREAM CIRCUIT PROTECTIVE DEVICES/ELECTRICAL CONNECTIONS TRANSFER SWITCHES WITH INTEGRAL OVER CURRENT PROTECTION SYSTEM PHASING-HIGH LEG DELTA SYSTEMS REMOTE START CONTACT FIELD WIRING DIELECTRIC TESTING INSTALLATION OF OPEN TYPE TRANSFER SWITCHES MOUNTING OF ENCLOSED TRANSFER SWITCHES 2 2 3 4 5 5 5 5 4. GENERAL DESCRIPTION 4. 1. [. . . ] For transfer switches rated 100A through 200A, over current protection is non-adjustable thermal-magnetic type trip units. For transfer switches rated 400A through 800A over current protection is adjustable electronic type with long time & instantaneous trip unit elements with optional ground fault protection elements. PM057 REV 8 10/01/25 16 Thomson Technology 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. The equipment will be shipped from the factory with a long-time current setting of 100% (of the equipment rating) and maximum instantaneous/short-time current and time delay settings. Do Not Energize this equipment until device settings have been verified to ensure proper system protection & coordination. Failure to do so may result in equipment failure. Refer to Section 4. 1 Product Model Code for types of integral over current protection which are supplied with the transfer switch. PM057 REV 8 10/01/25 17 Thomson Technology TS 840 TRANSFER SWITCH 7. GENERAL NOTES ON SERVICING TRANSFER SWITCH MECHANISM DANGER!!!!Do not open equipment until ALL power sources are disconnected 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. To maintain mechanical integrity, ensure that: · · · · 7. 2. Mechanical interlocking is correct when one power switching opens well before the other should close. The operating linkages are not damaged or bent, and that all bearing points operate freely. Operation arms should move freely without excessive play. To maintain electrical integrity, ensure that: · All electrical connections, especially power connections, are clean and adequately tightened. · · Corroded or loose power connections will cause destructive heating, and may cause premature tripping. All insulating devices are in place and in good condition. No moisture or other contamination is present. Electrical conductors are adequately secured away from moving parts. All control devices are in good condition and correctly calibrated. All control devices are adequately secured in their plug-in fixtures. To maintain operational integrity, ensure that: Only qualified personnel should undertake Service work. Failure to correctly maintain an automatic transfer switch may present a hazard to life and equipment. Full operational PM057 REV 8 10/01/25 18 Thomson Technology 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 highpotential testing to ensure that required insulation levels have been maintained. PM057 REV 8 10/01/25 19 Thomson Technology TS 840 TRANSFER SWITCH 8. TRANSFER SWITCH MECHANISM OPERATION­ 100A-800A, S Style The transfer mechanism consists primarily of the transfer gear motor, a drive hub assembly, and two power switching device operating arms. [. . . ] The transfer switch will begin transferring to the utility supply following the 2-minute utility return delay period. Note: the utility return delay timer will only begin timing if the utility voltage is above 85% nominal on all phases. Once the Generator power switching device opens, the transfer switch mechanism will pause in the neutral position for the 3-second neutral delay period, then the mechanism will complete the transfer and close the Utility power switching device to return the load to the Utility source. Once the load has transferred onto the utility source, the engine will continue to run for the 2-minute cool down time delay period and will then it will automatically stop. [. . . ]