870 Bypass Isolation

CSA 22.2 No. 178 & No. 31, 100 - 1200A, Single & 3 Phase 600V Max

The Thomson Power Systems TS 870 bypass isolation transfer switch is used for customized applications and includes all the features of the TS 870 transfer switch described in our TS 870 Automatic Transfer Switch brochure.  The independent switching units provide a degree of reliability and redundancy not available with the ganged contactor type bypass systems.

The TS 870 bypass isolation switch incorporates two basic types for bypass-isolation. Type “B” (double-sided) isolates the transfer switch and can bypass either the utility or generator source of the load, as selected by the operator. Single-sided bypass types “D” (utility bypass) and “C” (generator bypass) can bypass only one source to the load (in accordance with CSA 282-00 - Institutional & Residential Buildings Occupancy Group B and C). Note: CSA 282-00 requires (as a minimum) a single sided bypass on the generator supply.

The TS 870 series mechanisms utilize enclosed contact power switching units which provide a 100% continuous rating. The switches are mounted independently on a common frame.

Each switching unit is equipped with an internal quick-make, quick-break mechanism as standard, and is certified to switch without de-energizing any system loads.

The single handle bypass mechanism is permanently mounted, and will not permit the sources to be interconnected. An operator has three simple steps to follow when bypassing, for servicing procedures or in cases when there is a transfer switch failure and manual transferring is required. The unique single handle bypass design allows bypassing with or without a load interruption (double-sided bypass only). Bypass and isolation position indication is permanently mounted at each switch position allowing the operator to clearly identify which mode the system is in (illuminated position indication is available as an option)

  • Amperage Range: 100A - 800A
  • Voltage Range: 120/240V or 120/208V
  • Poles: 2 or 3
  • Frequency: 50/60Hz
  • Power Distribution: Single Phase, 3 Wire or 3 Phase, 4 Wire
  • Controller: TSC 80e
  • Standard Enclosure: Nema 1
  • Safety Standard: CSA C22.2 No. 178 / CSA
  • Quality Assurance:ISO 9001 Registered
  • Warranty: 2 Year