I'm trying to diagnose a voltage issue on a machine I'm working with. In the schematic, 480v current goes through the K120 contactor, into -L001, and comes out as 960v and into the G100. The manufacture claims that -L001 is NOT a transformer and is "just a line filter" and wants me to replace G100 which is a $9000 part. They claim I am getting feedback from G100 causing me to get the voltage spike, even though I measure voltage with the wires disconnected from G100. From what I can find, U/V/W1 and U/V/W2 are drawn in as inductors and with 3 of them next to each other in close proximity, it should be a transformer. Please correct me if I am wrong, as I've been working on this machine for 2 weeks fixing problem after problem. I've attached the schematic as well as the large object in question for reference.