Design and implementation of automatic phase changer

Simulation of an Automatic Phase Changer (APC) circuit was performed in this project. The simulation was carried out using Proteus 8. Automatic Phase Changer (APC) automatically changes the phase as the name suggests. In three phase power system 3 inputs of APC circuit are connected to three phases of the system and its three outputs are connected to three different loads. These three loads always need their normal rated voltage for proper operation. Results observed that if voltage of any phase goes below the nominal rating the loads may malfunction. Here, Automatic Phase Changer comes into action. When a phase voltage goes below its nominal rating, APC provides correct level of voltage to the load connected to that phase.

Design and implementation of automatic phase changer

Simulation of an Automatic Phase Changer (APC) circuit was performed in this project. The simulation was carried out using Proteus 8. Automatic Phase Changer (APC) automatically changes the phase as the name suggests. In three phase power system 3 inputs of APC circuit are connected to three phases of the system and its three outputs are connected to three different loads. These three loads always need their normal rated voltage for proper operation. Results observed that if voltage of any phase goes below the nominal rating the loads may malfunction. Here, Automatic Phase Changer comes into action. When a phase voltage goes below its nominal rating, APC provides correct level of voltage to the load connected to that phase.

Crustal Fault Connectivity of the Mw 7.8 2016 Kaikōura Earthquake Constrained by Aftershock Relocations

©2019. American Geophysical Union. All Rights Reserved. The 14 November 2016 Mw7.8 Kaikōura earthquake in the northern South Island, New Zealand, involved highly complex, multifault rupture. We combine data from a temporary network and the permanent national seismograph network to repick and relocate ~2,700 aftershocks of M≥3 that occurred between 14 November 2016 and 13 May 2017. Automatic phase-picking is carried out using REST, a newly developed hybrid method whose pick quality is assessed by comparing automatic picks for a subset of 138 events with analysts' picks. Aftershock hypocenters computed from high-quality REST picks and a 3-D velocity model cluster almost exclusively in the shallow crust of the upper plate and reveal linkages at depth between surface-rupturing fault segments. Only eight aftershocks are relocated on a deeper structure positioned between patches of geodetically detected afterslip. This indicates that afterslip has not triggered significant earthquake activity on the subduction interface during the period of aftershock activity analyzed.

Crustal Fault Connectivity of the Mw 7.8 2016 Kaikōura Earthquake Constrained by Aftershock Relocations

©2019. American Geophysical Union. All Rights Reserved. The 14 November 2016 Mw7.8 Kaikōura earthquake in the northern South Island, New Zealand, involved highly complex, multifault rupture. We combine data from a temporary network and the permanent national seismograph network to repick and relocate ~2,700 aftershocks of M≥3 that occurred between 14 November 2016 and 13 May 2017. Automatic phase-picking is carried out using REST, a newly developed hybrid method whose pick quality is assessed by comparing automatic picks for a subset of 138 events with analysts' picks. Aftershock hypocenters computed from high-quality REST picks and a 3-D velocity model cluster almost exclusively in the shallow crust of the upper plate and reveal linkages at depth between surface-rupturing fault segments. Only eight aftershocks are relocated on a deeper structure positioned between patches of geodetically detected afterslip. This indicates that afterslip has not triggered significant earthquake activity on the subduction interface during the period of aftershock activity analyzed.