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OLTC DCRM Measurements

Transformer OLTC dynamic resistance measurement testing equipment

OLTC DCRM Measurements

OLTC Diagnostic System
Dynamic Contact Resistance Measurement (DCRM) monitors OLTC condition during operation, detecting defects like contact deterioration or resistive layers caused by load current. Deviations in the DCRM graph help diagnose issues without accessing contacts, aiding preventive maintenance.
Vanguard TRM-20 meter for transformer winding resistance testing

Vanguard TRM-20

Winding Resistance Test Of Transformer
These instruments measure DC resistance in transformer windings, rotating machines, and inductive devices. Measuring and comparing resistance to design calculations ensures proper conductor size, quality of connections, and acceptable contact resistance in tap switches or tap changers.