DV POWER TWA40D Winding Ohmeter
- Resistance measurement of all tap positions in all
six windings performed in a single test - True three-phase on-load tap changer dynamic
resistance measurement - Extremely quick measurement, single-step cable setup
- Automatic discharge process
- Rapid automatic demagnetization
- Built-in tap changer control unit
- Additional testing mode, Quick YN, is enabled by the DV-Win software. In this mode, it is possible to measure the resistances of three transformer windings in the YN configuration simultaneously.
- It is also possible to test the resistances of all tap changer positions of all three phases in a single pass through the tap changer positions.
- Resistance measurement of all tap positions in all
- The DV-Win software enables control and observation of the test process, as well as saving and analyzing the results on a PC. It pro-vides 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.
- The standard interface is USB. RS232 is optional. Additional testing mode, Quick YN, is enabled by the DV-Win software. In this mode, it is possible to measure the resistances of three transformer windings in the YN configuration simultaneously.
- It is also possible to test the resistances of all tap changer positions of all three phases in a single pass through the tap changer positions.
DV-Win PC software
Ground PE cable
USB cable
Built-in Tap Changer Control Unit
Tap Changer Control cable set 5 m (16.4 ft)
USB flash drive feature
Mains power cable
Recommended accessories
H winding test cable set, 4 x 10 m (38.8 ft) with TTA clamps
X winding test cable set, 4 x 10 m (38.8 ft) with TTA clamps
Current clamp 30 / 300 A power supplied from the instrument with 5 m (16.4 ft) extension
Cable plastic case
Transport case