DV Power RMO-TH Handheld Winding Ohmmeter

OVERVIEW:

RMO-TH is a handheld, battery operated, fully automatic test set specially designed for winding resistance measurements of transformers and other inductive objects, such as motors and generators. It can also perform demagnetization of transformers, motors, and generators.

Winding resistance is determined by injecting DC current through a winding, accurately measuring DC voltage across the winding, and then calculating resistance as the ratio of voltage and current.

Application:

The list of Instrument Application Includes:

• Winding resistance measurement of distribution and instrument transformers, and motors and generators.

• Demagnetization of distribution and instrument transformers, and motors and generators.

Distribution Transformer:

Using two sets of cables, RMO-TH can be connected to one phase at transformer HV side, and one phase at transformer LV side simultaneously. For winding resistance measurement, RMO-TH can be connected to either transformer HV side or LV side, or to both in case when HV and LV winding resistances are going to be measured simultaneously.

Current Transformer:

RMO-TH can be used for testing winding resistance, as well as for demagnetization, of a current transformer (CT). Either DC source 1 (H side) or DC source 2 (X side) can be connected to CT secondary for measuring its winding resistance. Demagnetization should be performed from CT secondary side. Since RMO-TH’s DC source 1 (H side) is used for demagnetization process, this source should be connected to CT secondary winding for the purpose of demagnetizing CT.

Memory:

RMO-TH has 100 transformer records. Up to 15 winding resistance results can be stored in each transformer record.

Document:

DV Power RMO-TH Handheld Winding Ohmmeter