The T-PRO wasn’t warmly received, but engineers within the MAPP region noticed the flexibility of the platform. There was a particularly challenging aspect of stability of the Dorsey-Forbes Transmission Line that could not be readily solved using conventional relays. Minnesota Power (MNP) asked Dr. Swift if a better algorithm could be developed using the APT Relay. It could, so Dr. Zhiying Zhang (who had graduated and now worked for us at Vansco) wrote the algorithm and it was installed at Forbes Substation.