ATS3BC1000 / ATS4BC1000 / ATS3BC1200 / ATS4BC1200 is the 1000 Amp and 1200 Amp 3 pole and 4 pole MCCB type Modularized Automatic Transfer Switch. The Standard ATS package includes ATS-22A (Intelligent Controller), PTM-100 / PTM-400 (Voltage Transformer Module), BTS (Basic Transfer Switch), all the connection harness and indoor enclosure (outdoor type is optional).