The Cummins RA212S3 200 Amp Service Entrance Rated Automatic Transfer Switch delivers high-capacity, heavy-duty emergency power control for whole house residential systems. This professional-grade switch continuously monitors incoming utility power grid lines 24/7 to automatically prompt generator initialization and securely shift electrical loads the moment utility power fails.

Engineered as a 2-Pole Switch for 120/240V Single Phase Cummins Generators, this automatic assembly relies on an advanced Break-Before-Make mechanism to isolate generator power from utility lines cleanly. Cross-connection hazards are prevented by an integrated mechanical interlock that stops simultaneous closing of emergency and normal contacts, backed by electrical interlock control wiring for dual-layered safety coverage.

Designed to endure demanding environmental conditions, the internal contact system features long-life, high-pressure silver-alloy contacts that resist burning and pitting. The complete mechanical contact assembly is held firmly in both normal and emergency positions for exceptionally quiet standby performance, safely wrapped inside a lightweight Aluminum Enclosure NEMA Type 3R Rated certified for secure indoor and outdoor installations.

Key Features

• Cummins RA212S3 200-Amp Service Rated Automatic Transfer Switch
• 2-Pole Switch for 120/240V Single Phase Cummins Generators
• Break-Before-Make Isolates Generator Power from Utility Power
• Mechanical Interlock Prevents Simutaneous Closing of Emergency and and Normal Contacts
• Electrical Interlock Control Wiring Prevents Simutaneous Connection to Emergency and Normal Power Sources
• Long-life high-pressure silver-alloy contacts resist burning and pitting
• Mechanically held contacts in normal and emergency positions for quiet operation
• Aluminum Enclosure NEMA Type 3R Rated for Indoor/Outdoor Installation
• Cummins 2-Year Limited Warranty

Specifications