How and why is grounding of transformers important?
A. Grounding removes static charges that accumulate within a transformer. Grounding also reduces the chance of static discharge causing personal harm and possible equipment damage should the transformer windings accidentally come in contact with the core or enclosure. The actual method of grounding a transformer is simple, defined in NEMA Publication No. ST20, Part 1, Page 4: “ST20-1 19 GROUNDED Grounded means connected to earth or to some extended conducting body which serves instead of the earth, whether the connection is intentional or accidental. Effectively grounded means grounded through a grounding connection of sufficiently low impedance that fault grounds which may occur cannot build up voltages in excess of established limits…” Before grounding, make sure all contact surfaces are clean and free of any non-conductive protective coating. Any surface where connections are made must be free of rust, scale and any impediments. Make sure the flexible grounding jumper between the
Grounding removes static charges that accumulate within a transformer. Grounding also reduces the chance of static discharge causing personal harm and possible equipment damage should the transformer windings accidentally come in contact with the core or enclosure. The actual method of grounding a transformer is simple, defined in NEMA Publication No. ST20, Part 1, Page 4: “ST20-1 19 GROUNDED Grounded means connected to earth or to some extended conducting body which serves instead of the earth, whether the connection is intentional or accidental. Effectively grounded means grounded through a grounding connection of sufficiently low impedance that fault grounds which may occur cannot build up voltages in excess of established limits” Before grounding, make sure all contact surfaces are clean and free of any non-conductive protective coating. Any surface where connections are made must be free of rust, scale and any impediments. Make sure the flexible grounding jumper between the core a
