All 165 and 185 Series switches are delivered in a compact design with 2 pole configuration only. Available in 120/240 VAC only. UL 1008 listed to 240 VAC for total system loads. True double-throw, inherently interlocked construction, to absolutely prohibit connecting both sources together.

• Standard models in stock, dropped shipped to your location. FREE SHIPPING when purchased with a generator!
• Available in Nema Type 1 and 3R enclosures.
• Textured RAL 7035 light beige color aesthetically suitable for residential applications
• Typical 100 Amp 185 Series Size: NEMA 1 size 14.25" W X 24"H X 8.25" D, 44 lbs., in a steel cabinet
• Typical 100 Amp 185 Series Size: NEMA 3R size 16" X W 24" H X 10" D, 118 lbs., in an aluminum cabinet. See brochures for individual switch sizes. Sizes vary by amperage and indoor/outdoor cabinet type.
• Adjustable 1-3 second time delay to overcome temporary utility outages.
• 5-minute time delay on retransfer, to allow utility source to stabilize prior to transferring the load back to utility.
• Adjustable 0-4 second time delay while on standby source to ignore momentary generator voltage dips
• 10-second transfer to emergency time delay to allow the generator to stabilize after starting.
• 15-second time delay after transfer to the standby source, to ignore momentary voltage dips on the generator during initial loading.
• Adjustable 2 or 5-minute unloaded running time delay for generator cool-down before shutdown.
• Fixed time delays helps make these switches economical. If you require changeable time delays use Series 300, see below.
• Automatic units are mechanically held, electrically operated utilizing a reliable, field-proven single solenoid operator.
• Manual units are mechanically held, mechanically operated by a handle on the side of the unit.
• Manual models are identical to automatic models except that operation is manually initiated. Ideal for those applications that have manual start generators without provisions for automatic engine start. We recommend that customers use automatic switches which can be operated in manual mode. You cannot retrofit a manual switch to automatic in the field.
•  Automatic and manual units feature contacts that are easily accessible for easy inspection and preventive maintenance. Rated for standby applications and intended for use only in optional (non-critical) standby systems in accordance with the National Electrical Code. NEC/NFPA 70, Article 702. Note: Not intended for emergency or life-support systems.
• Qualified and listed to CSA C22.2 No. 178 and UL 1008 automatic transfer equipment standards.
• For technical data, dimensions, features, remote controls, monitoring, warranty and other information. See Additional Information below.
• Other automatic switches available in "Enclosed" versions, Series 300 in larger sizes and with customer installable options. See ASCO Transfer Switch Group - Automatic Transfer Switches - Enclosed - Series 300
• Other automatic switches available in "Open" versions, Series 300 for use in equipment rack systems, UL approved. See ASCO Transfer Switch Group - Automatic Transfer Switches - Open - Series 300

  Sequence of Operation

  See "Sequence of Operation" under Additional Information for details.

  When utility power fails for just 3 seconds or more, the Series 185 Automatic Transfer Switch signals the generator to start.

  In less than 30 seconds your electrical power is restored and life returns to normal.

  Once the Series 185 Automatic Transfer Switch senses utility power has reached an acceptable voltage level for a period of time, it automatically reconnects your home or business to commercial power.

  It then smoothly shuts the generator down after a one minute cool down period to extend generator life.

  The Series 185 Automatic Transfer Switch automatically performs a test to simulate utility power failure every 14 days.

  The user-friendly control panel also allows you to manually run a test at the push of a button.

  LED indicators let you know the availability of both power sources and transfer switch positions.