Shipped 2 copies of V Transformer Capacity Tester?

The capacity of the transformer is not measured in W, it is VA!

To calculate the capacity of a transformer, you need to know the transformer.

The rated voltage and rated current of the first and second times, but also know whether the transformer is single-phase or three-phase! So you can't determine the capacity of the transformer with this parameter now, and it is roughly estimated to be 100VA single-phase under the condition of power frequency! Three-phase 173VA!

Due to the increase of power transmission and transformation projects and the continuous increase of power capacity, the successive transformation of urban and rural power grids across the country, a large number of new energy-saving transformers will be put into power grid operation, but some old transformers due to long-term operation, many transformer nameplates are lost or illegible, and the rated capacity of transformers has been difficult to distinguish according to their volume. In order to solve the above problems, Guodian Xigao has developed a GDBR transformer capacity and no-load tester (active transformer capacity characteristic tester).

Features: It can accurately measure the capacity of various distribution transformers, and passive measurement is convenient and accurate.

It has its own internal power supply and automatically generates a three-phase high-power test power supply.

Built-in high-performance lithium-ion rechargeable battery, large capacity, fully charged can test more than 500 units continuously.

It can measure the no-load current, no-load loss, short-circuit voltage and short-circuit loss of various types of transformers.

It can automatically carry out waveform distortion correction, temperature correction, voltage correction (no-load test under non-rated voltage), current correction (short-circuit test under non-rated current conditions), and the operator only needs to input the correction index instrument according to the transformer type to automatically calculate the corrected results, which is very suitable for units that do not have slightly larger capacity transformer short-circuit test conditions.

Voltage circuit width: the voltage can be measured up to 750V, and the accuracy can be guaranteed without switching gears. There will be no damage to the instrument itself due to the wrong selection of voltage range.

Capacity measurement range: 20kVA 100000kVA.

The battery remaining power percentage indication function is by no means a simple power loss alarm.

Large screen, high-brightness LCD display, full Chinese character menu and operation tips to achieve friendly man-machine dialogue, conductive silicone touch buttons make the operation easier, the key life is longer.

The test data can be printed out at any time via a microprinter.

The test result storage function can store 200 sets of capacity test data.

Generally, only the percentage of voltage can be measured, for example, the short-circuit impedance of the transformer is, which means that when the transformer is primarily connected to the rated voltage, the secondary should output the rated current value. 1 set S11 type three-phase 10KV1250KVA dry-type transformer, the nominal voltage percentage is that when the primary is connected to 639V, the secondary stage should output 1800A current. It is impossible and unnecessary to achieve 10 points of accuracy, but as a regular transformer manufacturer, such data should be basically guaranteed.

Voltage.

Current. Margin of error: Upper stage over the full scale.

Capacity. Measuring range: 10kva 6300kvaError range: Transformer capacity measurement 10%.

Frequency. Measuring range: 45Hz 65Hz Error range: Full scale

The instrument is composed of two parts: the host and the accessory box, in which the host is the core of the instrument, all the electrical parts are inside the host, and the outer box of the host is made of high-strength imported waterproof injection molding chassis, which is sturdy and durable, and the accessory box is used to place test wires and tools.

The instrument circuit design is exquisite, the idea is unique, the performance is superior, the function is powerful, and it fully meets the requirements of the on-site distribution power transformer capacity test.

The instrument adopts advanced AD synchronous AC sampling and digital signal processing technology, which is simple to operate, convenient to wiring, accurate and reliable data, solves the problem of distribution transformer capacity test, and can display and print the measurement data that users are concerned about.

The instrument is mainly used for the capacity detection of distribution transformers, and the test power supply can complete the capacity test of 100 distribution transformers of 2500kva and below with one charge.

The human-machine interface of the instrument adopts blue screen (240 * 128) full Chinese Chinese character graphic display, the menu is strictly graded, step by step to guide you to complete the test, you only need to turn on, press any key, the menu provided by the instrument will guide you to complete the test you need. The use of this instrument can greatly improve work efficiency and reduce labor intensity.

Parameter voltage.

Measuring range: 10V

Margin of error: Upper stage over the full scale.

Current. Measuring range: 10a

Margin of error: Upper stage over the full scale.

Capacity. Measuring range: 10kva 6300kva

Margin of error: 10% of transformer capacity measurement

Frequency. Measuring range: 45Hz 65Hz Error range: Full scale

The principle of the transformer capacity tester:

In the generator, whether the coil movement through the magnetic field or the magnetic field movement through the fixed coil, can induce the electric potential in the coil, in both cases, the value of the magnetic flux is unchanged, but the number of magnetic flux intersecting the chain with the coil changes, which is the principle of mutual induction. A transformer is a device that uses electromagnetic mutual induction to transform voltage, current and impedance.

Basis: The transformer capacity tester consists of two aspects. The first is hysteresis loss, when the alternating current passes through the transformer, the direction and magnitude of the magnetic field lines passing through the transformer's silicon steel sheet change accordingly, so that the molecules inside the silicon steel sheet rub against each other and release heat energy, thereby dissipating a part of the electric energy, which is the hysteresis loss.

The other is eddy current loss, when the transformer is working. There are magnetic field lines in the iron core passing through, and in the plane perpendicular to the magnetic field lines, the state hall will induce a current, because this current forms a closed loop to form a circulation, and into a vortex shape, so it is called eddy current. The presence of eddy currents heats up the core and consumes energy, and this loss is called eddy current loss.

The efficiency of the transformer is closely related to the power level of the transformer, usually the greater the power, the smaller the loss to the output power ratio, and the higher the efficiency. Conversely, the lower the power, the lower the efficiency.