A new generation of innovative CT and PT testing instruments has been developed based on the traditional transformer volt ampere characteristic transformation ratio polarity comprehensive tester based on voltage regulators, voltage boosters, and current boosters, after listening to user opinions from multiple sources, conducting extensive market research, and conducting in-depth theoretical research. The device adopts high-performance DSP and FPGA, and good manufacturing technology, ensuring stable and reliable product performance, complete functions, high degree of automation, and high testing efficiency. It is a professional testing instrument for transformers in the power industry.

1. Fully functional, it not only meets the testing requirements for excitation characteristics (i.e. volt ampere characteristics), transformation ratio, polarity, secondary winding resistance, secondary load, ratio difference, and angle difference of various CTs (such as protection, metering, TP), but also can be used for testing excitation characteristics, transformation ratio, polarity, secondary winding resistance, ratio difference, etc. of various PT electromagnetic units.
2. On site verification of current transformers does not require standard current transformers, current transformers, load boxes, voltage regulation control boxes, or high current wires. Simple testing wiring and operation are used to achieve the verification of current transformers, greatly reducing work intensity and improving work efficiency, making it convenient to carry out on-site transformer verification work.
3. It can accurately measure the ratio difference and angle difference, with an allowable error of ± 0.05% for large ratio differences and ± 2 minutes for large angle differences. It can measure 0.2S-level current transformers with a ratio measurement range of 1-40000.
4. Based on the high-tech frequency conversion method, the CT/PT volt ampere characteristic curve and 10% error curve are tested, and the output is only 180V AC voltage and 12Anms (peak value of 36A) AC current, but it can cope with CT testing with inflection points up to 60KV.
5. Automatically provide CT and PT parameters such as inflection point voltage/current, 10% (5%) error curve, accuracy limit factor (ALF), instrument safety factor (FS), quadratic time constant (Ts), remanence coefficient (Kr), saturated and unsaturated inductance.
6. The test meets various transformer standards such as GB1208 (IEC60044-1), GB16847 (IEC60044-6), GB1207, etc., and automatically selects which standard to test according to the type and level of transformer.
7. The testing is simple and convenient, with one click completion of CT direct resistance, excitation, transformation ratio, and polarity testing. In addition to load testing, all other CT tests use the same wiring method.
8. 5.7-inch graphic transparent LCD, clear and visible under sunlight.
9. Using a rotating optical mouse for operation, it is simple, fast, convenient, and easy to master.
10. The panel comes with a printer that can automatically print the generated test report.
11. Easy to carry, device weight<9Kg.

		DK-45VA1+
Test purpose		CT， PT
output		0~180Vrms，12Arms，36A（peak value）
Voltage measurement accuracy		±0.1%
CT ratio measurement	Range	1~40000
	accuracy	±0.05%
PT ratio measurement	Range	1~40000
	accuracy	±0.05%
phase measurement	accuracy	±2min
	resolving power	0.5min
Measurement of secondary winding resistance	Range	0~300Ω
	accuracy	0.2%±2mΩ
Communication load measurement	Range	0~1000VA
	accuracy	0.2%±0.02VA
Input power supply voltage		AC220V±10%，50Hz
work environment		temperature：-10οC~50οC，  humidity：≤90%
Size and weight		Size 365 mm×290 mm×153mm     Weight<10kg