ATS3BC0225 / ATS4BC0225 is the 225 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).