NS1250N ML5.0E not reading frequency and showing zero Power readings.

According to the user guide,Micrologic E trip units do not support frequency display. Therefore, frequency values are not available when using this trip unit.

For confirmation, please refer to the provided link, page 66.

A check of the register list for Compact NS breakers (refer to the attached screenshot) confirms that Compact NS units equipped with Micrologic E trip units do not support frequency display. As a result, the frequency register returns NaN.

In the register table, the A/E/P/H column applies to NT/NW and NS breakers. This table indicates that only P and H trip units support frequency measurement and display on the registers. Micrologic E trip units do not include this capability.

For further details, please refer to the linked document, page 91.

On Micrologic 2.0E, 5.0E, and 6.0E trip units:

The power value displayed on the Micrologic E front display and transmitted via Modbus is reported as zero when the load current is below 0.07 × In, where In represents the rated input current.

The current value displayed on the Micrologic E front face and transmitted via Modbus is reported as zero when the load current is below 0.005 × In.

When the load current falls between 0.005 × In and 0.07 × In, and the voltage is non‑zero, the current and voltage values are displayed normally; however, the calculated power value remains zero.

As a result, in customer applications, power calculation effectively begins when the load current exceeds 0.07 × In (Ia).