Handheld Turns Ratio & Winding Resistance Tester – TWR-H Series
The Handheld TWR-H device is DV Power single-phase instrument designed for measuring transformer winding resistance and turns ratio.
Handheld Turns Ratio & Winding Resistance Tester – TWR-H Series
The Handheld TWR-H device is DV Power single-phase instrument designed for measuring transformer winding resistance and turns ratio.
Description
Turns Ratio & Winding Resistance Tester TWR-H Series
The Handheld TWR-H device is DV Power single-phase instrument designed for measuring transformer winding resistance and turns ratio.
The instrument has two output DC sources for measuring transformer winding resistance. The first DC source can output up to 2 A DC and is used for injecting current into the transformer’s high-voltage winding. The second DC source can output up to 10 A DC and is used for testing the transformer’s low-voltage winding. This is especially useful when measuring the winding resistance of distribution transformers. These transformers have a large turns ratio and therefore a big difference between resistances of high voltage and low voltage windings. Upon the winding resistance test, it is also possible to demagnetize the transformer core. The demagnetization process is completely automatic and safe.
Applications:
- Winding resistance measurement of distribution and instrument transformers, motors, and generators
- Turns ratio measurement of distribution transformers
- Turns ratio verification of instrument transformers
- Turns ratio deviation calculation
- Excitation current measurement of distribution and instrument transformers
- Phase angle measurement of distribution and instrument transformers
- Polarity check of instrument transformers
- Demagnetization of distribution and instrument transformers, motors, and generators
TWR-H is powered by an internal Li-Ion battery. Up to 100 tests can be performed with a fully charged battery.
TWR-H Series Specification Highlights
| Generated Voltage | Up to 40 V AC for turns ratio test |
| Generated Current | - Up to 2 A DC for HV side - Up to 10 A DC for LV side |
| Weight | 1.4 kg / 3.1 lbs |
| Battery | Up to 100 tests |
Datasheet:
Description
Turns Ratio & Winding Resistance Tester TWR-H Series
The Handheld TWR-H device is DV Power single-phase instrument designed for measuring transformer winding resistance and turns ratio.
The instrument has two output DC sources for measuring transformer winding resistance. The first DC source can output up to 2 A DC and is used for injecting current into the transformer’s high-voltage winding. The second DC source can output up to 10 A DC and is used for testing the transformer’s low-voltage winding. This is especially useful when measuring the winding resistance of distribution transformers. These transformers have a large turns ratio and therefore a big difference between resistances of high voltage and low voltage windings. Upon the winding resistance test, it is also possible to demagnetize the transformer core. The demagnetization process is completely automatic and safe.
Applications:
- Winding resistance measurement of distribution and instrument transformers, motors, and generators
- Turns ratio measurement of distribution transformers
- Turns ratio verification of instrument transformers
- Turns ratio deviation calculation
- Excitation current measurement of distribution and instrument transformers
- Phase angle measurement of distribution and instrument transformers
- Polarity check of instrument transformers
- Demagnetization of distribution and instrument transformers, motors, and generators
TWR-H is powered by an internal Li-Ion battery. Up to 100 tests can be performed with a fully charged battery.
TWR-H Series Specification Highlights
| Generated Voltage | Up to 40 V AC for turns ratio test |
| Generated Current | - Up to 2 A DC for HV side - Up to 10 A DC for LV side |
| Weight | 1.4 kg / 3.1 lbs |
| Battery | Up to 100 tests |
