The Vanguard CB Analyzer Test Box is designed as a field training/demo tool for the CT-7000, CT-8000, and DigiTMR. It can be used to verify the CT-7000/CT-8000/DigiTMR's timing function. The CB Analyzer Test Box provides 3 independent dry-contact channels to simulate the 3 phases of a circuit breaker. A built-in 12Vdc power supply is used to open or close the contacts. An OPEN or CLOSE command can be sent by using the front panel switches or the OPEN and CLOSE terminals. The contact status is indicated by LED's on the front panel. The CB Analyzer Test box can simulate the following CB operations: OPEN, CLOSE, O-C, C-O, O-C-O.