Digital Display Transformer Dielectric Loss Tester Tan Delta Test Set

• After-sales Service: Lifetime Technical Support
• Warranty: 1 Year for Transformer Tan Delta Tester
• Type: Transformer Tan Delta Tester
• Accuracy Grade: 1
• Load Way: Electronic Load
• Loading Method: Dynamic Load
• Model NO.: GDMZ
• Display: Digital
• Control: Manual Control
• Weight: 28kg
• Power Source: AC220V
• Product Name: Transformer Tan Delta Tester
• High Voltage Output: 0.5~10kv
• Accuracy 1: Tg: ± (Reading *1.5% +0.06%)
• Measuring Range: 0.001% <Tg <100%
• Accuracy 2: Cx: ± (Reading * 1.5% +5 PF)
• Harmonic Adaptation: ≤ 3%
• Power Supply: AC 220V ± 10% 50/60 ± 1Hz
• High Voltage Output 1: Increasing by 500V for Each Level, a Total of 20 L
• Transport Package: Plywood Case
• Specification: 465*350*360mm
• Trademark: GOLD
• Origin: Chongqing, China
• HS Code: 9030849000
• Production Capacity: 500 Pieces/Month

Product Description

Digital Display Transformer Dielectric Loss Tester Tan Delta Test Set
 

Tan Delta Test | Loss Angle Test | Dissipation Factor Test

A pure insulator when is connected across line and earth, it behaves as a capacitor. In an ideal insulator, as the insulating material which acts as dielectric too, is 100 % pure, the electric current passing through the insulator, only have capacitive component. There is no resistive component of the current, flowing from line to earth through insulator as in ideal insulating material, there is zero percent impurity.

In a pure capacitor, the capacitive electric current leads the applied voltage by 90°.

In practice, the insulator cannot be made 100% pure. Also due to the aging of insulators, the impurities like dirt and moisture enter into it. These impurities provide the conductive path to the current. Consequently, an electric leakage current flowing from line to earth through the insulator has a resistive component.

Hence, it is needless to say that, for good insulator, this resistive component of electric leakage current is quite low. In another way, the healthiness of an electrical insulator can be determined by the ratio of the resistive component to the capacitive component. For good insulator, this ratio would be quite low. This ratio is commonly known as tanδ or tan delta. Sometimes it is also referred to as dissipation factor.

Method of Tan Delta Testing

The cable, winding, current transformer, potential transformer, transformer bushing, on which tan delta test or dissipation factor test to be conducted, is first isolated from the system. A very low-frequency test voltage is applied across the equipment whose insulation to be tested.
First, the normal voltage is applied. If the value of tan delta appears good enough, the applied voltage is raised to 1.5 to 2 times of normal voltage, of the equipment. The tan delta controller unit takes measurement of tan delta values. A loss angle analyzer is connected with tan delta measuring unit to compare the tan delta values at normal voltage and higher voltages and analyze the results.During the test, it is essential to apply test voltage at a very low frequency.

 

Power supply	AC 220V ± 10%
High voltage(HV) output	0.5~10KV  (12KV can be customized) Increasing by 500V for each level, a total of 20 levels, capacity: 1500VA
Measuring range	0.001% 100%; Internal High Pressure:3PF~60000PF/10KV, 60PF~1µF/0.5KV. External High Pressure:3PF~1.5µF/10KV,60PF~30µF/0.5KV
Measuring method	1) Single frequency:45(45Hz measuring),50(50Hz measuring), 55(55Hz measuring),60(60Hz measuring),65(65Hz measuring) 2) Different frequency:50D(45Hz/55Hz measure each time); 60D(55Hz/65Hz measure each time); Automatic frequency conversion.
Accuracy	tgδ: ± (reading *1.5% +0.06%) Cx: ± (reading * 1.5% +5 PF)
Resolution	tgδ: 0.001%   Cx: 0.001pF
CVT Variable ratio test	Variation ratio measurement accuracy: ± reading *1% The range of the measurement: 10~99999 Phase measurement accuracy: ±0.1° Phase measurement range: 0~359.9°
Harmonic adaptation	≤ 3%
Application condition	-15 ºC-50 ºC Relative humidity <80%
Size and weight	465*350*360mm,28kg

Accessory

Test Results