Sensata introduces high-voltage insulation monitor

Sensata Technologies has introduced the SIM200 Insulation Monitoring Device (IMD) to bolster safety within the evolving electric vehicle landscape. This sturdy insulation monitor is equipped with total capacitance measurement and continuous monitoring capabilities tailored for advanced high-voltage systems up to 60 V.

Within high-voltage systems, electrical isolation is maintained through non-conductive barriers like insulation on cables and plastic housings on components, alongside safe physical distancing. An insulation monitor plays a pivotal role in overseeing these systems for potential failures that could lead to the unwanted flow of excess current, thereby posing a risk of electrocution.

By harnessing its patented signal injection algorithm and processing prowess, the SIM200 is engineered to provide uninterrupted monitoring, even during system downtime or significant voltage fluctuations. This insulation monitor is also adept at monitoring the total stored capacitance in the system – a critical feature for ensuring safety in future high-powered megawatt charging scenarios and for aligning with upcoming insulation monitoring standards.

Building on technology inherited from Sensata’s acquisition of Sendyne Corp in 2021, the SIM200 focuses on monitoring the insulation of Isolated Terra systems by introducing a small voltage through isolation resistors onto both the positive and negative high-voltage rails. The injection pulses alternate between these rails at specified intervals, with the system scrutinizing these pulses against the system voltage to identify any safety issues and facilitate a shutdown if needed.

Designed to seamlessly function across various platforms including EV charging, the SIM200 is offered in a selection of standard modules tailored for applications ranging from 60 V to 1500 V. The device holds UL 2231-2 recognition and has undergone testing to meet the requirements of IEC 61557-8. Its communication framework, developed in collaboration with leading OEMs, features dual dedicated fault state outputs, robust self-diagnosis capabilities, and a modular CAN 2.0B interface for detailed system insights.