HGY Type Transformer Characteristics Comprehensive TesterDetailed product description：

The HGY type transformer characteristic comprehensive tester is specially designed for the professional testing of current transformer volt ampere characteristics, transformation ratio testing, and polarity discrimination in relay protection. It can also be used for transformer polarity discrimination testing and is a multifunctional testing instrument with high cost performance ratio.
This instrument uses high-efficiency, low-consumption, high-quality materials and a special winding method booster. The microprocessor is used for data acquisition, analysis, and storage. The built-in micro printer can print test data and curves. When measuring CT transformation ratio, the transformation ratio can be automatically calculated. One person can complete all testing tasks. This machine is lightweight, portable, and easy to operate. Its unique performance makes it a rare instrument at present.

Polarity discrimination
1. Connect the primary side of the tested transformer to the L+and L - sockets on the panel using a pair of test wires.
2. Connect the secondary side of the tested transformer to the K+and K-sockets on the panel using another pair of test wires.
3. Instantly press the test button "20" (the time for pressing the button should be short, otherwise it will shorten the service life of the instrument). If the meter head on the panel is instantly biased forward (i.e. to the right), then the terminal connected to L+on the primary side and K+on the secondary side of the tested transformer are of the same polarity; On the contrary, it is a non polarized end. (The needle pointing at the moment when the button is disconnected is opposite to the moment when the button is connected, which is a normal phenomenon.)
4. Test completed, disconnect the power and unplug the connecting cable.
5. The polarity discrimination of transformers can be tested using this method.

Technical parameters of HGY type transformer characteristic comprehensive tester
1. Input voltage: AC 220V or 380V, 50HZ, automatic recognition of input voltage.
2. Working environment temperature: 0-40 ℃
3. Output voltage: When input AC 220V, output 0-550V;
When inputting AC 380V, output 0-1000V
Current: The maximum instantaneous current measurement ratio is 240A.
The volt ampere characteristic test was conducted at 15A.
4. Measurement range of digital voltmeter: 0-9999.9V; resolution: 0.1V.
When displaying current: 0-99.9mA; resolution: 0.1mA.
5. Measurement range of digital ammeter: 0-15A (240A), resolution: 0.01A.
6. Error: I ≤ 3%, U ≤ 3%.
When measuring CT transformation ratio, the transformation ratio can be automatically calculated, and the data and calculation results can be printed.
When measuring the volt ampere characteristics, store and print 20 sets of current voltage values and volt ampere characteristic curves.
9. Dimensions: Length x Width x Height=470 x 340 x 260mm3
10. Weight: 21kg.

Precautions for use
1. The secondary coil of the current transformer should not have a grounding point.
2. The voltage regulator switch and output switch can only be wired and disconnected in the disconnected position.
3. Before the experiment, this device should be reliably grounded.