**2. Current Sensor Output**

The ACS770ECB current sensor was selected for its continuous current rating of up to 200 A. The device features a high overcurrent rating and a rise time of 4.2 μs (0–60 A). The sensor is of the hall effect-type, and uses the magnetic field generated by the current to produce a linear output voltage. A test of the input current versus output voltage was conducted on the sensor using an omicron CMC 356 relay test set. The input current was varied from 0 to 45 A in 1 A increments and the output voltage was recorded (as shown in Figure 3).

**Figure 3.** Experimental results of current vs. output voltage for the ACS770ECB current sensor.

A linear trendline was used to fit the collected data. The corresponding linear equation was found to be

$$\mathbf{V\_a} = 0.0204 \ast \mathbf{I\_{in}} + 0.5211,\tag{1}$$

where, Va is the analog voltage output from the sensor and Iin is the input current. The output voltage showed a 20.4 mV increase per amp passing through the sensor. The linear output is essential for the easy implementation of analog to digital conversion (ADC) settings of the SSCB and is further discussed in Section 5.
