ZTX, ZTG, ZTS Automatic Transfer Switch OSHPD Seismic Certification Application

This document is an application for OSHPD Special Seismic Certification Preapproval (OSP) submitted by ABB Zenith Controls for their ZTX, ZTG(D), ZTS(D) automatic transfer switches with TruONE panel. The application includes manufacturer and applicant details, seismic design parameters (ASCE 7-10, SDS=2.00, ap=2.5, Rp=6.0), testing in accordance with ICC-ES AC156, and was approved by OSHPD on January 20, 2021, with validity through December 31, 2025.