1、Outline
SDCT-H Transformer site tester is based on the successful development of transformer calibrator based on a detailed analysis of the mathematical model of the transformer business and to develop a field test instrument transformers. The instrument can be national standards measuring current transformer is worse than poor and angular, but also measuring the current 1% to 120% of the difference between any percentage ratio difference and angle; direct measurement of current and voltage transformer turns ratio; qualitative difference can be measured voltage transformer ratio difference and angle; field-measuring current and voltage transformers actual secondary load; volt-ampere characteristic curve measurable protective current transformer and 10% error curve, and so on. The instrument uses high-precision, automatic linear regulated DC and AC power supply; high-speed, high-reliability digital processing module; high accuracy, high stability of the pre-measurement circuit to ensure the accuracy and high stability instrument measurements. In addition, the instrument uses the latest development of the 640 × 480 large LCD Full Chinese interface platform technology, user-friendly interface, prompts wiring and operation, and save any measurement parameters and measurement results print function.
2、product performance standards
JJG313-94 "measuring current transformer test procedures"
JJG314-94 "measuring voltage transformer test procedures"
JJG1021-2007 "measuring transformer test procedures"
JJG169-93 "transformer calibrator test procedures"
DL / T668-1999 "measuring transformer testing device"
3、Features
(1) The new S-class measurement capabilities increase, to measure site 0.2S, 0.5S current transformer; a measurement process, can simultaneously test the upper limit of the standard error of the current transformer under load and lower load; increasing the PC software online.
(2) The instrument uses the platform interface technology, large-screen LCD display, full Chinese prompts automatic measurement, the entire instrument is simple; equipment is small, easy to carry, only a few people can quickly complete measurements.
(3)In cooperation with the purchase of the company's Unified up-flow, boost plant equipment, may be protective voltage characteristics of the current transformer and 10% error curve test. Easy operation, and it can automatically display volt-ampere characteristic curve and draw 10% error curve.
（4）Instrument voltage transformer for qualitative measurements: measurement, instrument voltage transformer primary side plus a certain frequency voltage, a voltage can be measured and the induction voltage of the secondary, obtained voltage transformer in the voltage ratio and polarity under.
（5）Instrument measures the current and voltage transformer secondary site load, measure the difference between the current transformer under load ratio difference and angle.
（6）The instrument can measure no current or voltage transformer turns ratio identified, and the measurement is accurate and fast, good and stable performance, without an additional source of up-flow or boost。
（7）The instrument can measure any point worse than the poor and the angle between 1% to 120% of the current transformer, no standard current transformer and external l converter, measurement accuracy to meet the technical requirements mentioned below, suitable for field testing use.
（8）The instrument can be stored and printed various measurement data, large-scale field test data memory can store up to 1000, set the parameters for each power-down can be saved.
（9）Intelligent judgment external line status, suggesting that a wiring error, ratio, polarity errors.
（10）Automatic test data of the whole, and determine whether the ultra-poor, ultra poor use of anti-black box data shows the characteristics of the transformer data display and intuitive to understand, issued directly on-site verification conclusion, judging pass or fail.
（11）Shockproof chassis with plastic mold, anti-pressure, guarantee the safe operation of the field personnel.
（12）Testers should have computer communication interface, you can easily transfer data to a computer will detect and provide the appropriate software.
4、Main Specifications:
（1）Current transformers:
A. Ratio range: 5A / 5A ~ 25000A / 5A (5A / 1A ~ 5000A / 1A).
It turns ratio error: 0.5%.
B. CT error measurement range 5A / 5A ~ 25000A / 5A (5A / 1A ~ 5000A / 1A)
The transformer secondary current is 5A rated current range |
5 | 7.5 | 10 | 15 | 20 | 25 | 30 | 40 |
50 | 60 | 75 | 100 | 150 | 200 | 250 | 300 |
400 | 500 | 600 | 750 | 800 | 1000 | 1200 | 1250 |
1500 | 2000 | 2500 | 3000 | 4000 | 5000 | 6000 | 7500 |
10000 | 12500 | 15000 | 20000 | 25000 | | | |
The transformer secondary current is 1A rated primary current range |
25 | 30 | 40 | 50 | 60 | 75 | 100 | 150 |
200 | 250 | 300 | 400 | 500 | 600 | 750 | 800 |
1000 | 1200 | 1250 | 1500 | 2000 | 2500 | 3000 | 4000 |
5000 | | | | | | | |
Machine accuracy: measured current transformer error limit 1/3
Limit error satisfies 0.05%, namely:
5% of the rated current measurement error: worse than the 0.1 angle difference 4 '
20%, 100% and 120% of rated current measurement error: 0.05 worse than the angular difference between the 2 '
(2) voltage transformer measuring range:
2.2kV ~ 132kV, measurement error: worse than 0.5.
(3) The actual secondary load test
PT load 2.5VA ~ 500VA, measurement error: 2
CT load 0.1Ω ~ 25Ω, measurement error: 2
Namely: Measuring range: R: 0.00Ω ~ 25.0Ω
Y: 0.000mS ~ 100.0mS
(4) The volt-ampere characteristics of the test
Current test range: 0.1A ~ 50A, measurement error: 1
Voltage test range: 10V ~ 1500V, measurement error: 1
(5) Working Conditions:
Power supply voltage: AC 220V 10%
Power frequency: 50Hz 、60Hz
Ambient temperature: (0 ~ 40) ℃
Humidity: 25 ℃ at <85%