On-load tap changer dynamic resistance measurement
Three resistance measurement channels
One temperature measurement channel
Automatic resistance measurement
Heat Run test
Rapid automatic demagnetization
Tap changer motor current monitoring channel
Automatic discharge circuit
Built-in tap changer control unit
Three models: RMO25TD, RMO40TD, RMO60TD
Three-channel winding resistance measurement, which enables simultaneous winding resistance measurement of up to three windings on a single phase
Dynamic resistance measurement (DVtest) of on-load tap changers, performed on a single phase
A measurement of on-load tap changer motor current by using a dedicated channel
Heat Run test, which enables obtaining the Hot Spot temperature along with resistance graph during the cooling process
A single-phase automatic transformer demagnetization
The Tap Changer Analyzer & Winding Ohmmeter of the RMO-TD series is designed for winding resistance measurement of inductive objects, and for a tap changer analysis.
The RMO-TD series is accurate (0,1_%), powerful (up to 60 A) and lightweight.
It generates a true DC ripple free current with automatically regulated measurement and discharging circuit.
RMO-TD series can perform a simple, quick and reliable transformer on-load tap changer condition assessment.
This series enables measurements of a winding resistance in every tap position, current ripple values (percentage of a current drop during a tap change) and transition times during the tap changes. Problems with a connection, contacts, and selector/diverter switch operation (tap change with interruption) can be detected with these measurements.
The DV-Win software enables control and observation of the test process, as well as saving and analyzing the results on a PC.
It provides a test report, arranged in a selectable form as an Excel spreadsheet, PDF, Word, or ASCII format.
The software provides an OLTC (tap changer) condition assessment through analysis of the graphs representing dynamic resistance values during the tap changer transitions.
Additionally, the DV-Win measures and calculates the OLTC transition time, the ripple and the winding resistance for each tap changing operation.
It also enables the recording of tap changer motor current, which is used for detecting motor and mechanical problems.
The software can also perform the calculations necessary for the “Heat Run” test.