Transformer characteristics comprehensive tester model_function_manufacturer

2. Reference standard
GB 1207-2006, GB 1208-2006
Three. Transformer characteristics comprehensive tester (three-way) working conditions requirements
1. The input voltage is 220Vac±10% and the rated frequency is 50Hz.
2. The tester should be powered by a power outlet with protective ground. If there is a problem with the connection of the protected ground, or the power supply is not isolated from the ground, the tester can still be used, but we do not guarantee safety;
3. The ambient temperature corresponding to the parameter is 23 °C ± 5 °C;
4. Why does the secondary side of the transformer allow 5% and 10% error curves?
The secondary load of the protection current transformer should meet the requirements of the 5% error curve. As long as the secondary actual load of the current transformer is less than the allowable load of the 5% error curve, the measurement error of the qualified current transformer is at the rated current multiple. Within 5%. The larger the secondary load, the easier the current transformer core is saturated, and the smaller the allowable current multiplier. Therefore, the 5% error curve, that is, the n/ZL curve, is the curve shown in FIG. In the example shown in Figure 44 (the measured CT is 5P10 20VA): 5 is the accuracy level (error limit is 5%), P is the transformer form (protection level), and 10 is the accuracy limit factor (10 times) The rated current), 20VA represents the rated secondary load (capacity). When the current multiple is 10.27 times (close to 10 times), the allowable secondary load is 27.19 Ω, which is greater than the rated load of the CT of 20 VA (20 VA / 1 = 20 Ω). The data can be judged to be qualified by the data. In addition, the secondary load allowed for the secondary load of 19.58 Ω (close to 20 Ω) is 27.19 Ω, which is greater than the rated load of the CT of 20 VA (20 VA / 1 = 20 Ω), and the data can be judged to be acceptable by the data. In addition, when the secondary load is 19.58 Ω (close to 20 Ω), the allowable current multiple is 12.85 times, which is larger than the rated current multiple of the CT (10 times), and the transformer can also be judged to be qualified by the data. In fact, as long as you find any of these two key points, you can judge whether the measured transformer is qualified.

Transformer characteristic comprehensive tester (three-way), transformer tester

1, support for testing CT and PT
2, transformer characteristics comprehensive tester (three-way) can simultaneously detect 3 sets of CT test, once completed, easy to operate.
3. Meet the requirements of GB1207, GB1208 and other regulations.
4. No need to connect other auxiliary equipment, single machine can complete all inspection items.
5, comes with a micro-fast printer, can directly print test results on-site.
5, using intelligent controller, easy to operate.
7, large screen LCD, graphical display interface.
8. Automatically give CT/PT (excitation) inflection point value according to the procedure.
9. The transformer characteristic tester (three-way) automatically gives 5% and 10% error curves.
10, can save 3000 sets of test data, not lost after power failure.
11, support U disk dump data, you can read through a standard PC, and generate a test report.
12, small and light ≤ 22Kg, very conducive to field testing.
Tester main test function: (see Table 1)

CT (protection, measurement)	PT
• Voltammetric characteristics (excitation characteristics) curve	• Voltammetric characteristics (excitation characteristics) curve
• Automatically give the inflection point value	• Automatically give the inflection point value
• Automatically give 5% and 10% error curves	• Ratio measurement
• Simultaneous detection of 3 sets of ratiometric measurements	• Polarity judgment
• Ratio measurement	• Ratio measurement
• Phase (angular difference) measurement	• Phase (angular difference) measurement
• Polarity judgment	• AC withstand voltage test
• One pass test	• Secondary load test
• AC withstand voltage test	• Secondary winding test
• Secondary load test	• Core demagnetization
• Secondary winding test
• Core demagnetization