He chose the last one.
The (specifically the GMR-32B ) is a 3-phase monitoring relay commonly used in elevator and industrial control systems to protect against phase loss and incorrect phase sequence. gmr32b phase controller manual hot
Here's a general guide to help you get started: He chose the last one
Check the manual for specific pulse patterns, as these often point to "Phase Loss" or "Load Open." 4. Maintenance Checklist gmr32b phase controller manual hot