A SPI Has The Tools TO GET THE JOB DONE. Megger's SPI225 Smart Primary Injection Test System has the tools to make testing your breakers simple and easy. Automatic testing and report generation, over 7,500 pre-loaded manufacturer's time curves to test against, and it's the first unit on the market to eliminate variac control - the SPI225 has the experience and tools to simplify your breaker testing so you can keep the power on. The word "Megger" is a registered trademark. us.megger.com/spihttp://us.megger.com/spi