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GE Multlin SPM Application to Prevent Power Factor Trip during Voltage Dip

I have a 2500 Hp; 4000 Volts; 240 RPM; 0.87 P.F. synchronous motor with GEMultlin 269+ & SPM protection that trips on Power Factor Fault from the SPM when another motor (induction motor) load is applied. The induction motor is connected to the load through an air clutch and once engaged, the voltage dips enough to cause the trip. The synchronous motor load has to operate before the induction motor load since the synchronous motor is downstream from the induction motor for product flow.

The SPM provides excitation control to maintain a leading power factor. The exciter is a solid state device (all GE controls circa 1995, except for the SPM, which was added to replace the original microSPM). The SPM is set for ridethrough.

Is there a way to provide a temporary input to the SPM to reduce field excitation and potentially reduce the power factor swing during the Voltage dip at start up of the other motor? I hesitate to increase P.F. Trip Delay to reduce the chance of torque pulsations.

I have detail information on the synchronous machine and factory setpoints for the relays.

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