The Sensata | Sendyne SIM100MLP is the first high voltage isolation monitoring / insulation monitoring / IMD device for Electric Vehicles (EV/HEVs) and charging stations capable of operating correctly even when the battery is active, and experiencing large voltage variations. The SIM100MLP continuously monitors the isolation resistance between a vehicle’s IT (Isolated Terra) power system and chassis for deterioration of isolation and potentially dangerous levels of leakage current. The module detects not only resistive leakages but also capacitively stored energy that could be harmful to human operators.
Due to a proprietary, patented and patent pending advanced algorithm, the module is capable of detecting all sources of leakage, including multiple, simultaneous symmetrical and asymmetrical faults, as well as resistive paths between the chassis and points in the battery with the same potential as the chassis. In the case of an isolation fault, the unit identifies the position of the fault in relation to the battery’s terminals. Battery-connected VX1 (Vp) and VX2 (Vn) voltage inputs can measure ±1.1 kV (max, see ordering options for other ranges) in reference to Chassis (0 V). Communications are achieved via an isolated CAN 2.0B interface and the unit operates over a wide temperature range of –40 °C to +105 °C/+125 °C without connectors.
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