HYG-5kVA/50kV light-duty high-voltage test transformer is manufactured according to the "Test Transformer" standard of the Ministry of Mechanical and Electrical Engineering and on the basis of a large number of improvements on the original similar products. HYG-5kVA/50kV light-duty high-voltage test transformer is a new product produced on the basis of TDM (G) series test transformer and improved according to the national standard ZBK-41006-89. This series of products have the characteristics of small size, light weight, compact structure, complete functions, strong versatility and convenient use. Especially suitable for power system, industrial and mining enterprises, scientific research departments and other high-voltage electrical equipment, electrical components, insulation materials for power frequency or DC high-voltage insulation strength test. It is an indispensable and important equipment in high pressure test.

HYG-5kVA/50kV Light High Voltage Test Transformer Part:

HYG-5kVA/50kV light-duty high-voltage test transformer is manufactured according to the "Test Transformer" standard of the Ministry of Mechanical and Electrical Engineering and on the basis of a large number of improvements on the original similar products.

HYG-5kVA/50kV light-duty high-voltage test transformer is a new product produced on the basis of TDM (G) series test transformer and improved according to the national standard ZBK-41006-89.

HYG-5kVA/50kV Control Box

The HYG-5kVA/50kV control box (platform) is designed and manufactured according to the unique usage range of the high voltage test transformer. Its functions are as follows:

A. Closing Acousto-optic Alarm

B. Timing sound and light alarm;

C. Electronic low voltage current protection (box type);

D. Direct reading of high voltage voltage;

E. Pressure test time is set freely (digital display);

F. Mobile structure (desktop)

Capacity selection of test transformer:

Determining formula of transformer capacity Pn in nominal test: Pn=KV n 2_Ct *10-9

Type: Pn - Nominal test transformer capacity (kVA)

Vn - Valid Value of Rated Output High Voltage of Test Transformer (kV)

K - Safety factor. When the nominal voltage Vn is greater than 1MV, k = 2; when the nominal voltage is lower, K value may be higher.

Ct - Capacitance of Subject (pF)

_ - angular frequency, _ = 2 pi f, F - frequency of test power supply

The capacitance CT of the tested equipment can be measured by AC bridge. CT varies greatly, depending on the type of equipment. Typical data are as follows:

Simple rod or suspension insulator dozens of micro-methods

Simple Classified Casing 100-1000pF

Voltage transformer 200 ~ 500pF

Power Transformer 1000 kVA~1000 pF

1000 kVA 1000~10000 pF

250~300pF/m Insulation for High Voltage Power Cable and Oil-immersed Paper

Gas Insulation ~60pF/m

Closed Substation, SF6 Gas Insulation 100~10000pF

For different test voltage Vn, choose different (appropriate) safety factor K. The K values selected for different Vns are listed below for reference.

Vn = 50-100 kV k = 4

Vn = 150~300 kV k = 3

Vn > 300kV k = 2

Technical parameters, specifications and selection of control box:

The capacity of the control box is nominated as the capacity of the voltage regulator and the voltage regulator. If it works with the test transformer (working system within 30 minutes in a short time), it can be matched according to the provisions of the power industry standard of the People's Republic of China "DL474.4-92": P=0.75P. P-test transformer capacity and P-regulator capacity. If it is used for batch test of electrical equipment factory products, the capacity of voltage regulator should be equal to the capacity of test transformer, that is, P0=P.

The technical parameters of the control box are as follows:

HYG-5kVA/50kV light high voltage test transformer adopts single frame core structure. The primary winding is on the core and the high-voltage winding is outside. This coaxial arrangement reduces the flux leakage and increases the coupling between windings. The shell of the product is made with an octagonal structure which matches the core well, and the overall shape is beautiful and generous.

HYG-5kVA/50kV series control box is composed of contact voltage regulator (more than 50kVA is electric column voltage regulator) and its control, protection, measurement and signal circuit. It adjusts the voltage regulator (i.e. the input voltage of the test transformer) by connecting 220V or 380V power frequency power supply to obtain the required test high voltage voltage value.