KDHG-518B transformer characteristic tester is a current and voltage transformer testing instrument developed by our company after extensive listening to users' opinions, through a large number of market research and in-depth theoretical research. The device adopts high-performance DSP and ARM manufacturing technology to ensure stable and reliable performance, complete functions, high degree of automation, high test efficiency, and is a professional test instrument for transformers in the power industry.

Main technical features
Comprehensive function, not only to meet the various types of CT(such as: protection class, metering class, TP class) excitation characteristics (that is, voltammetry characteristics), ratio, polarity, secondary winding resistance, secondary load, ratio and Angle difference test requirements, but also can be used for protection class PT electromagnetic unit excitation characteristics, ratio, polarity, secondary winding resistance and other tests.
 
CT and PT parameters such as inflection point voltage/current, 10%(5%) error curve, accuracy limit coefficient (ALF), instrument security coefficient (FS), secondary time constant (Ts), remanence coefficient (Kr), saturation and unsaturated inductance are automatically given.
 
It can accurately measure the ratio difference and Angle difference, the maximum allowable error of the ratio difference is 0.05%, and the maximum allowable error of the Angle difference is 2min. It can measure the 0.2S current transformer, and the ratio measurement range is 1~50000.
 
The test meets GB20840.1(IEC60044-1), GB20840.2(IEC60044-6), GB20840.3, etc.
 
Based on the test principle of low frequency method, the output is only 180V AC voltage and 12Arms(36A peak) AC current, which can cope with the inflection point of up to 65KV CT test.
 
 
The device can store 2000 sets of test data without losing power. After the test is completed, the U disk is stored in the PC, the data is analyzed by software, and the WORD report is generated.
 
5.7-inch graphic transversal LCD, clearly visible in sunlight.
 
The test is simple and convenient, one key to complete CT direct resistance, excitation, ratio and polarity tests, and in addition to the load test CT other tests are using the same wiring mode.
 
Easy to carry, device weight <9Kg.

Main technical parameters
Test purpose: protection CT, protection PT
Output: 0~180Vrms, 12Arms, 36A(peak)
CT ratio measurement
The value ranges from 1 to 50000
Accuracy: ±0.2%
PT ratio measurement
The value ranges from 1 to 50000
Accuracy: ±0.2%
Phase measurement
Range: ±2min
Accuracy: 0.5min
Secondary winding resistance measurement
The value ranges from 0 to 300 ohms
Accuracy: 0.2%+2mΩ
Ac load measurement
Range: 0 to 1000VA
Accuracy: 0.2%+0.02VA
Input voltage: AC220V+10%, 50Hz
Working environment: Temperature :-10C~50℃, humidity :≤90%
Size, weight: Size 340mm x220mmx330mm weight <9kg
Aluminum case size: 430mm x270mm x500mm