The Carriere STS100 Secondary Injection Test Set designed to functional test the DIGITAL 600 and FB600E/ER Trip Unit. 

The STS100 has a built in timer, ammeter and current source, an output for an actuator to trip a breaker and protective circuitry to guarantee that current carrying components are not damaged by overheating. 

The entire package can be carried by hand as it weighs 13 kg (28 lbs) and can be connected directly to the Trip Unit under test without the need for an interface module or isolation transformer. All of the functions are available at the push of a button and the digital time and digital current displays provide accurate and easy to read test results.