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[China]
Trade Verify
Address: Hi-tech Developing Industrial Area, Liuyang City,Changsha,Hunan Province,China
Contact name:Sandy
Advanced Instruments Co.,Limited |
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Verified Suppliers
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I. Introduction:
The on load tap changer test instrument can record switch operation waveform in overall process. The longest time is 6.4s.It can test various parameters such as transition waveform, transition time, transition resistance and three phase synchronization one time and analyze results automatically. It has power-off protection, over-voltage protection, perpetual clock and high-speed printing.
II.Main Features
1. Test transformers of type Y0 Y Δ and display resistance value
directly;
2. Automatically analyze waveform fault and mark the fault;
3. Automatically adjust resistance value and time range according
to sampling data;
4.Transformer type Δ is able to display to synchronization status
of three phase;
5. The OLTC test instrument is able to test with winding or without
winding;
6. Four terminal connection mode and provide high accuracy of
resistance measurement.
7. Continuous test to save time of power off
8. This on load tap changer test instrument can produce word
report
9. 800×480 colorized LCD with touch screen and high speed printer
are designed with OLTC on load tap changer tester.
10. Store 1000 groups of data and also can be saved by USB flash
disk.
III. Specifications:
| 1 | Three phase constant current source charge,charge current | 3A/1A; 0.6A/0.2A |
| 2 | Maximum voltage of the port | 24V |
| 3 | Maximum range of transition resistance | 100Ω |
| 4 | Measuring range | 1A:0.4Ω~20Ω 0.2A:10Ω~100Ω |
| 5 | Record time of waveform | 300ms |
| 6 | Sample rate | 30K |
| 7 | Resolution of time | 0.1ms |
| 8 | Resolution of resistance | 0.1Ω |
| 9 | Accuracy of transition resistance | ±5% Reading±0.1Ω |
| 10 | Accuracy of transient time | ±0.5% Reading±0.2mS |
| 11 | Temperature | -10-40°C Humidity: <85%RH |
IV.Accessories List
Test cable
Ground cable
Power cable
The mouse
U flash disk with PC software
V.Opeation introduction
①.The winding of transformer could be connected in the test circuit but all the external power source should be removed before make connection with the tester and sample transformer.
②.No testing windings of transformer should be short connected to the earth grounding while the terminal O shouldn’t be connected to the earth grounding；
③. If the tap changer hasn’t been operated for a long time Please clean the oxid layer and impurity by move the tap changer multi times.
④. Please be sure that the tester has been connect to the earth grounding reliable before run the tester.
⑤. Please don’t measure more than two groups of test line in one group measurement；
⑥. It’s forbidden to cut off the test connection when tester running.
⑦．Please turn off the tester first and then remove the test connections.
VI.Sample test result:
| T0(ms) | T1(ms) | T2(ms) | T3(ms) | T4(ms) | R0(Ω) | R1(Ω) | R2(Ω) | |
| A phase | 0.0 | 19.9 | 5.1 | 19.9 | 44.9 | 0.8 | 5.1 | 5.0 |
| B phase | 0.0 | 19.9 | 5.1 | 19.9 | 44.9 | 0.8 | 5.0 | 5.0 |
| C phase | 0.0 | 19.9 | 5.1 | 19.9 | 44.9 | 0.9 | 5.0 | 5.0 |
