Square D PowerPact P, M and R-frame circuit breakers are designed to protect electrical systems from damage caused by overloads and short circuits  Molded case circuit breakers are available with either basic electronic trip system or Micrologic electronic trip units. PowerPact P- and R-frame molded case circuit breakers may be specified with any of the following MicroLogic Electronic Trip Units This MicroLogic Standard 6.0A Trip Unit with field-interchangeable long-time rating plug has LSIG configuration and ammeter aditional feature. Adjustable rating plugs are offered in eight different ranges of long-time pickup adjust­ments. Each adjustment times the sensor rating (lr x In) of the circuit breaker sets the long-time pickup value of the circuit breaker Trip unit provides true RMS sensing, LED long-time pickup indication and thermal imaging. Also it has available test kits.