1. Current transformer error measurement section
1) Machine accuracy: 1 / 3 of the error limit of the measured current transformer
2) Test range: 5A / 5A~25000A / 5A or 5A / 1A~6300A /
Secondary current of 5A transformer rated primary current range |
5 | 7.5 | 10 | 15 | 20 | 25 | 30 | 40 |
50 | 60 | 75 | 80 | 100 | 120 | 150 | 160 |
200 | 250 | 300 | 315 | 400 | 500 | 600 | 630 |
750 | 800 | 1000 | 1200 | 1250 | 1500 | 1600 | 2000 |
2500 | 3000 | 3150 | 3200 | 4000 | 5000 | 6000 | 6300 |
A secondary current of 1A transformer rated primary current range |
5 | 7.5 | 10 | 15 | 20 | 25 | 30 | 40 |
50 | 60 | 75 | 80 | 100 | 120 | 150 | 160 |
200 | 250 | 300 | 315 | 400 | 500 | 600 | 630 |
750 | 800 | 1000 | 1200 | 1250 | 1500 | 1600 | 2000 |
2500 | 3000 | 3150 | 3200 | 4000 | 5000 | 6000 | 6300 |
Note: The current transformer with a secondary current of 1A can be comparable to 31,500 A / 1A by equal-safety turn measurement.
Other test methods for the current transformer change ratio appearing at the end in the table are as follows:
Test the current transformer using the isometric turn method, e. g., to test the 1000A / 5A transformer, please put the test line of the instrument through the measured current transformer into two turns, and then the current transformer test interface in the instrument is 500A.This test method does not affect the validity of the transformer test data.
Similarly, other variable ratios use the following processing methods:
Rated once (A) | Wear the number of turns | Instrument primary current (A) |
80 | 2 | 40
|
120 | 2 | 60 |
8000 | 2 | 4000 |
12000 | 2 | 6000 |
3) Operating range of the measured current transformer: 1%~200%
4) Secondary load: 2.5VA~300VA, COS =0.1~1.0
5) Accuracy range of the inspected current transformer: 1.0, 0.5, 0.5S, 0.2, and 0.2S
6) Resistance and conductor measurement error is 5.0%
7) measuring range: R: 0.00Ω~20.0Ω Y: 0.000mS~100.0Ms
2. Voltage transformer tester part
1) cophase component:
DX= ± (X 2% + Y 2% ±, 2 words)
DY= ± (X 2% + Y 2% ± in 5 words)
Display values of the "X", "Y" —— instruments
Quantization error of the "5-word" —— instrument
2) Ptable: Level 1
3) measuring range:
F : 0.0000%～200.0%
δ： 0.000′～999.9′
3. Power consumption of the instrument: 20VA
4. Instrument accuracy level: level 0.05s
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