Teridian's 71M6403 Electronic Trip Unit device is claimed to be the industry's first merchant system-on-chip (SOC) for industrial motor circuit protection and circuit breaker applications. The 71M6403 is designed to provide reliable start-up in motor circuit protection applications, preventing damage to the motor and increasing the useful life of the motor. This programmable device can be tuned according to voltage, current, rate of voltage increase and rate of current increase. The 71M6403 is also designed to trip instantaneously on threshold events within less than 7 ms from power on, or can be set to trip on delay, based on user-determined current and voltage profiles. The device incorporates a 22-bit delta-sigma ADC, 7 current sensor inputs, digital temperature compensation, precision voltage reference, 32-bit programmable computation engine, timers, realtime clock (RTC), two UARTs and an single cycle execution 8-bit MCU. With an internal digital di/dt integrator, the device supports either CT or Rogowski-Coils for any, or all, input channels, and provides instantaneous and delayed over-current, earth-leakage, ground-fault and arc fault protection functions.
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