I Introduction
This single and three CT PT transformer tester is performing excitation, ratio and phase error, polarity, secondary loop burden and coil resistance on current and voltage transformer. The instrument provides fully automatic testing and calibration for all types of low leakage flux current transformer and inductive voltage transformer. The maximum knee point voltage of sample CT could be reached 8.4kv.
The standards support by current transformer analyzer include IEC60044-1, IEC60044-2, IEC60044-6 and C57.13
II Application
Tests for CT PT Tester:
1)Excitation curve and parameters test
2)Turns ratio test
3)Ratio and phase error test
4)Polarity mark check
5)Coil resistance measurement
6)Secondary loop burden measurement
7)Error line curve test for protection CT
8)Transient CT parameters test
9)CT nameplate guess
10)Saturation hysteresis loop curve measurement
Tests for voltage transformer:
1)Turns ratio test
2)Polarity test
3) Secondary burden test
4) Coil resistance test
Applications forCT PT Tester :
1) CT nameplate check
2) CT parameters check in work burden
3) CT transient parameters analysis
4) CT ratio and phase error calibration
5) PT routine test
III Technical Parameter
| Model | GDVA-404 Single and Three CT PT Transformer Tester | |
| Test standards | IEC60044-1, IEC60044-6, GB1208, GB16847, C57.13 | |
| Power supply | AC220V±10%,50Hz/60Hz±10% | |
| Power output | 0.1~125V (AC) | |
| Current output | 0.001~5A(RMS) | |
| Power output | 300VA | |
| Maximum knee voltage measurement | 45kv | |
| Current measurement | Range:0~10A (automatically change range in 0.1/0.4/2/10A) | |
| Error <±0.1%+0.01%FS | ||
| Voltage measurement | Range:0~200 V (automatically change range in 1V/10V/70V/200V) | |
| Error < ±0.1%+0.01%FS | ||
| Turns ratio measurement | Range :1~30000 | |
| 1~2000 error<0.05% | ||
| 2000~5000 error>0.1% | ||
| 5000~30000 error<0.2% | ||
| Phase measurement | error:±2min,resolution:0.01min | |
| Coil resistance measurement | Range:0~8kΩ (automatically change range in 2ohm/20ohm/80ohm/800ohm/8kohm) | |
| Error< 0.2%RDG+0.02%FS | ||
| Maximum resolution:0.1mΩ | ||
| Temperature measurement | -50~100 Celsius degree, error<3 Celsius degree | |
| CT Secondary burden | Range 0~160ohm (automatically change range in 2ohm/20ohm/80ohm/160ohm) | |
| Error <0.2%RDG+0.02%FS | ||
| Maximum resolution 0.001ohm | ||
| PT Secondary burden | Range 0~80kohm (automatically change range in 800ohm/8kohm/80kohm) | |
| Error <0.2%RDG+0.02%FS | ||
| Maximum resolution: 0.1ohm | ||
| PT ratio measurement | Range :1~30000 | |
| 1~5000 error<0.2% | ||
| 5000~30000 error<0.5% | ||
| Saved data groups | >1000groups | |
| Work condition | Temperature:-10ºC~50ºC, moist:≤90% | |
| Size | 485mm×356mm×183mm | |
| Weight | <15Kg | |
IV Related CT PT Tester
GDVA-402 CT PT Transformer Tester
GDVA-405 Portable CT PT Transformer Tester
