Siemens RMS-TS-TZ 
Static Trip 3 
Microprocessor-based Tripping System
Protection Functions: Long-time and short-time overcurrent protection
Application: Siemens Type RL series low-voltage power circuit breakers
RMS Current Sensing: Measures true heating potential of the current waveform
Communication: Compatible with Siemens ACCESS™ system for data acquisition
Display: Custom LCD for overcurrent trip indication
New - shelf ware