Transformer capacity tester XHTX1318AJ is specialized in bad power users evading basic electricity fee and secretly adding capacity problems and is a new-type high precision instrument specially used for the measurement of the transformer capacity and characteristic parameters. This product use wide-screen color LCD , English display, simple and quick menu operation, human-machine interface is very friendly. There is a built -in rechargeable battery inside the instrument and it can work without external power source. A fully charged battery can be continuously measured more than 100 sets of transformer. In addition, the instrument can provide three-phase precise 50Hz sine wave AC test power without the external three-phase test power, the voltage regulator, current regulator and other auxiliary equipment in measuring the capacity and transformer load loss, thus greatly improving the efficiency of your work.

This is a multi-functional measuring instrument, which is equivalent to two common meters: such as active transformer capacity tester plus transformer parameter tester. It can be used for test transformer capacity, type, no-load current, no-load loss, load loss, impedance voltage and so on.

This product has many advantages such as small dimension, light , high accuracy, good stability, simple operation and so on. It can replace of the commonly many meters, you can measure the transformer loss and capacity with simple wiring and convenient testing in only one this kind of instrument so that the work efficiency can be greatly improved.

Function

• We can measure a variety of distribution transformer, power transformer capacity instead of the additional extra power. It is more convenient and efficient.

• Combined with the external power source, voltage, current regulator equipment etc, it can measures various transformer parameter such as no-load current, no-load loss, impedance voltage, load loss and so on.

• Characteristic test of transformer, test range is wide,flexible configured.only through the simple connection to current transformer and voltage transformer, test scope can be enlarged to high-grade power transformer.

• Short-circuit the terminals of cable,humanization design,with lock,easy connected to fasten units of transformation.

• All results are automatically carried out relevant correction. You only need to input the related parameters (such as temperature, load adjustment coefficients etc), then the instrument can automatically calibrate such as waveform deformity correction, temperature correction, correction of non rated voltage, rated current correction,so that the accurate is much higher

• The maximum voltage is up to 750V and the maximum current is up to 100A range with protection circuit in it,when you make the characteristic test of transformer.don’t worry the precision and damage of the instrument due to in-proper shift.

• The voltage and current range can be very flexible and easy to expand by connecting the external CT or VT

• It has large screen, high brightness LCD display, English menu and operation tips, friendly man-machine interface and wide temperature tolerance, brightness adjustable type LCD screen, which can adapt to the different temperature.

• Thermal sensitive printer is set inside the instrument,it can easily print on site.

Definition and terms of Transformer Testing

Transformer capacity and characteristic test is a professional test. There are many contents and items in transformer testing ,it is needed to use uniform terms to describe and define these characteristic and process under test

1. Tap

In the transformer with tapped winding, every tap in this winding stands for a fixed turns number of winding in this tap, which also means a fixed turns number ratio of winding between this tap winding with other constant winding

2. Main Tapping

Tap corresponds to the rated parameters of transformation.

Attention: The data of load/no-load loss and no-load current is the data of transformer under the principal tapping (except for appointed other taps)

3. On-load Tap switch

It is the device that is used to change the position of tap winding of transformer under the operating with excitation or on-load.

4. No excitation Tap switch

It is the device that is used to change the position of tap winding of transformer under operating no-load or without excitation.

5. No-load Loss (commonly known as: iron loss, iron core loss)

When rated voltage (tapped voltage) under rated frequency is applied to terminal of one winding and the circuit of other windings are open, in this case ,the active power consumed is No-load loss.

6. No-load Current

When rated voltage (tapped voltage) under rated frequency is applied to terminal of one winding and open circuit of other windings, it is the value of the root average of current.

Note 1: For three phase transformer, it is the average of current of three phase terminals.

Note 2: Generally use the percentage of the rated current to display. For the multi-winding transformer, it is based on the winding with the max rated capacity.

7. Load Loss (Short Circuit Loss/Copper Loss)

in one pair of winding, when rated current flows through the line terminal and make short circuit of the other winding under the rated frequency and referenced temperature,in this case, the active power consumed is called load loss, at the same time ,other winding if there is , please make the circuit open .

Note1: For the double winding transformer, there is just one pair of winding and one value of load loss.

For multi-windings transformer, there are multi pairs and values of loading loss,the total load loss should be corresponding to the load loss of appointed winding combination.

Note2: When the rated capacities are different for two windings in a winding combination(or wingding portfolio), the load loss should be based on the rated current value of the windings with the minimum rated capacity, and should appointed out the reference capacity.

• Total loss

The sum of no-load loss and load loss

• Short circuit Impedance

Generally, short circuit impedance is the impedance value of a pair of winding Under the rated frequency and reference temperature, the equivalent series impedance in one winding of a pair windings between the terminals of this winding is

Z=R+jX(Ω). To figure out the value, the terminal of the other winding need to short circuit. If there are other windings, they need to open circuit.

Note1: For the transformer with tapped windings, short circuit impedance need to be the appointed tap, if there is no special instruction, it means the principal tap. For three-phase transformer, it means the impedance value of a single phase if the circuit is in equivalent star connection.

Note 2: It can be represented using non-directional relative value that means fraction value Z of the reference impedance value Zref in same winding of one pair windings, is as follows

the Formula is suitable for the three phase and single phase transformer.
U——Voltage of Z and Zref in windings(rated voltage or tapped voltage)
Sr——Basic value of rated capacity.

The relative value is equal to the ratio between the applied voltage and rated voltage (tapped voltage) when operator wants to get the corresponding rated current (tapped current) in short circuit test. This voltage is also called the short-circuit voltage of this pair windings. It is generally expressed as a percentage.

Technical Parameters
The output range of built-in battery
Voltage:0～10V
Current:0～10A
The input range of characteristic test power source

Voltage:0～750V

Current:0～100A

Accurate of test

Voltage, current:±0.2%
Power:±0.5%(CosΦ>0.1), ±1.0%(0.02<CosΦ<0.1)
 

Working temperature: -20℃～+60℃

Requirement of charger
Electric supply AC160V～265V
Adapter output 12.6V 1000mA

Insulation
⑴ Insulation resistance between capacity , voltage, current to enclosure ≥100MΩ
⑵ bear the 2kV power frequency (effective value) between the
input power and machine enclosure, testing time is 1 minute.

Volume :32cm×25cm×12cm
Weight: 2.5KGS

Operation panel diagram
The operation panel is like figure 1 : including printer , LCD, keyboard, the wiring hole of capacity test , binding post of characteristic test and communication interface.

Main Menu
After open the power switch, automatic enter into the main menu interface (see Figure 2) Main Menu includes: "Transf. power ", "No - load loss", "Load loss", "Data Browser", "System Settings" five Items. You can use the "↑", "↓", key to select the needed function and click "OK" to enter.

At the same time, the instrument according to the system's internal clock chip, can accurately display the present time.

Company profile

XZH TEST is a professional cable fault detection equipment manufacturer. We are a young team. Our development philosophy is humanized management, intelligent cloud-based products, and internationalized operations. Our development mission is to make electrical equipment free from undetectable failures.

Since its inception in 2013, our company has grown to become one of the largest manufacturer of underground cable fault detection equipment in China. An ISO 9001 and CE certified company, we produces a broad range of testing equipment.

What we can do

We have the ability to innovate new products and technologies.

We can provide complete system solutions for your project.

We provide online and offline practical and theoretical training.

We provide instrument repair and calibration.

FAQ

1. Are you a trading company or a manufacturer?
We are a professional manufacturer with more than 10 years of experience. We can strictly control the quality of parts and finished products.

2. What is the delivery time and inventory?
If our best-selling products are in stock, it will be 5-8 working days for shipment. But for mass production and customized production, the time will take 2-4 weeks.

3. What are your payment terms?
Payment ≤ USD 2000, 100% T/T prepayment. Orders over USD 2000 can be negotiated.

4. How long is your product warranty?
We provide 1 year warranty for the equipment.

5. How do you ensure quality?
The product links include R&D, manufacturing, commissioning and technical support, following strict and scientific management principles. Therefore, we can support strong production and R&D capabilities, and can produce high-quality products at competitive prices to meet customers' high requirements.

6. What support can I get?
We will provide training support, marketing support, technical support and supply chain support. You can contact us for more information.

7. Where is your factory? Can I visit your factory?
We are located in Xi'an, Shaanxi, China. We are close to Xi'an Xianyang International Airport, which is about 2 and half hours by plane from Shanghai and Guangzhou. All customers from all over the world are welcome to visit us.

8. How to become your dealer?
Every company interested in power system instruments can contact us without hesitation, including website letters, emails, telephones, etc. We will contact you quickly according to your company information and cooperation intentions.