Transformer Calibrator

HGQY-H voltage transformer field tester based on the traditional differential measurement method uses the voltage transformer load error curve extrapolation method mentioned in the newly issued JJG1021-2007 "Power Transformer" Verification Regulations. Using low-voltage extrapolation technology combined with advanced measurement circuits a single instrument can measure electromagnetic voltage transformers from 6kV to 220kV/3 with an accuracy level of 0.05 which is very suitable for field voltage transformer verification.


1. No need for booster voltage standard load box and voltage regulator on site you can achieve the test of voltage transformer ratio difference and angle difference. A single instrument weighs 12 kg which greatly facilitates on-site use.

2. The test speed of the instrument is fast and the measurement of a single voltage transformer does not exceed 1 minute.

3. The instrument is equipped with a micro printer which can print test data on site.

4. It can store 1000 sets of data and can communicate with PC by RS-232 interface.

5. The equipped data management software can be networked with the power system MIS software.

6. Adopt 10.4-inch large-screen LCD display with humanized operation interface and wiring diagram and simple operation guide are attached to the instrument.

7. The output power is large which can meet the required capacity of 220kV voltage transformer boost.

HGQY-H voltage transformer field tester based on the traditional differential measurement method uses the voltage transformer load error curve extrapolation method mentioned in the newly issued JJG1021-2007 "Power Transformer" Verification Regulations. Using low-voltage extrapolation technology combined with advanced measurement circuits a single instrument can measure electromagnetic voltage transformers from 6kV to 220kV/3 with an accuracy level of 0.05 which is very suitable for field voltage transformer verification.


1. No need for booster voltage standard load box and voltage regulator on site you can achieve the test of voltage transformer ratio difference and angle difference. A single instrument weighs 12 kg which greatly facilitates on-site use.

2. The test speed of the instrument is fast and the measurement of a single voltage transformer does not exceed 1 minute.

3. The instrument is equipped with a micro printer which can print test data on site.

4. It can store 1000 sets of data and can communicate with PC by RS-232 interface.

5. The equipped data management software can be networked with the power system MIS software.

6. Adopt 10.4-inch large-screen LCD display with humanized operation interface and wiring diagram and simple operation guide are attached to the instrument.

7. The output power is large which can meet the required capacity of 220kV voltage transformer boost.

The high-voltage electric energy measurement devices of power plants and substations and the electric energy measurement devices of a large number of users are related to the interests of power generation power transmission power supply and multiple parties of users. In order to ensure accurate measurement the inspection must be carried out in accordance with SD109 "Inspection Regulations for Electric Energy Measurement Devices" and DL / T448-2000 "Technical Management Regulations for Electricity Measurement Devices".

TKHG-Q current transformer field calibrator was developed based on high-end testing technology large-scale electronic circuit design and in compliance with relevant national regulations. It solves the problems of on-site verification of current transformer and voltage transformer with high working intensity and tedious operation. At the same time the product has reliable performance and powerful functions.

HGQY-H voltage transformer field tester based on the traditional differential measurement method uses the voltage transformer load error curve extrapolation method mentioned in the newly issued JJG1021-2007 "Power Transformer" Verification Regulations. Using low-voltage extrapolation technology combined with advanced measurement circuits a single instrument can measure electromagnetic voltage transformers from 6kV to 220kV/3 with an accuracy level of 0.05 which is very suitable for field voltage transformer verification.


1. No need for booster voltage standard load box and voltage regulator on site you can achieve the test of voltage transformer ratio difference and angle difference. A single instrument weighs 12 kg which greatly facilitates on-site use.

2. The test speed of the instrument is fast and the measurement of a single voltage transformer does not exceed 1 minute.

3. The instrument is equipped with a micro printer which can print test data on site.

4. It can store 1000 sets of data and can communicate with PC by RS-232 interface.

5. The equipped data management software can be networked with the power system MIS software.

6. Adopt 10.4-inch large-screen LCD display with humanized operation interface and wiring diagram and simple operation guide are attached to the instrument.

7. The output power is large which can meet the required capacity of 220kV voltage transformer boost.

The high-voltage electric energy measurement devices of power plants and substations and the electric energy measurement devices of a large number of users are related to the interests of power generation power transmission power supply and multiple parties of users. In order to ensure accurate measurement the inspection must be carried out in accordance with SD109 "Inspection Regulations for Electric Energy Measurement Devices" and DL / T448-2000 "Technical Management Regulations for Electricity Measurement Devices".

TKHG-Q current transformer field calibrator was developed based on high-end testing technology large-scale electronic circuit design and in compliance with relevant national regulations. It solves the problems of on-site verification of current transformer and voltage transformer with high working intensity and tedious operation. At the same time the product has reliable performance and powerful functions.

1. The instrument also has a recursive method to measure the current transformer error which is convenient for the on-site verification of the measurement device.

2. On-site verification of current transformers does not require standard current transformers current risers load boxes voltage control boxes and high-current conductors. It uses extremely simple test wiring and operations to achieve the verification of current transformers greatly reducing the work The intensity and working efficiency are improved which is convenient for the on-site verification of transformers.

3. The instrument has a standard voltage transformer equivalent to the same transformation ratio of the measured current transformer. Its accuracy can reach 0.05 level and the transformation ratio and no-load error of the measured current transformer can be accurately measured. Then combine the test results of impedance and admittance to calculate the error of the transformer.

4. Adopt different frequency power supply test close to power frequency to prevent on-site power frequency electromagnetic radiation and series interference.

5. Wide measuring range can reach 5A / 5A ~ 25000A / 5A or 5A / 1A ~ 6300A / 1A.

HJ series standard voltage transformers are designed and manufactured for the actual needs of basic power supply and production departments.This product has the advantages of compact structure small size light weight easy to carry and easy to operate without maintenance etc. This product is especially suitable for field use and can also be used as standard voltage transformer and test transformer in laboratory.

Product nickname, Precision voltage transformer, Calibration voltage transformer Calibrating voltage transformer Standard voltage transformer for calibration PTstandard standardPT High precision voltage transformer high precisionPT

product brief introduction Product Introduction
HJ series standard voltage transformers are designed and manufactured for the actual needs of basic power supply and production departments.This product has the advantages of compact structure small size light weight easy to carry and easy to operate without maintenance etc. This product is especially suitable for field use and can also be used as standard voltage transformer and test transformer in laboratory.

Product nickname voltage transformer Calibration voltage transformer voltage transformer Standard voltage transformer for calibration PTstandard standardPT High precision voltage transformer high precisionPT

Product description

Transformer Standard current transformer are also called precision current transformers, current transformer standards, standard CT and current transformer standards. Transformer standards are divided into current transformer standards and voltage transformer standards. Standard current transformers are used in the error test of transformers. Used as a current transformer calibration standard



technical parameter

1. Temperature:

2. Relative humidity

3. Rated Primary Current:5-5000A 5A,1A

4.Rated secondary current:5 1A

5 Accuracy Class 0.05S

6. Allow long-term work under the rated current; More than120A across the core.



Precautions:

1. The current of standard CT and tested CT must be the same in CT calibration.

2. Follow the given wiring diagram strictly.

3. Test whether the load box is accurate or not before calibrating the transformer.

4. Forbid secondary winding opening during the calibration.

5. Select demagnetization before calibration.The wiring diagram is shown in figure 5.

Short out the secondary winding before cutting off the power when the demagnetization is finished.

6.Principle wiring diagram of CT with large current generator is similar to above diagram. They are the same except the output winding of large current generator and primary winding of transformer are the same one.

Product description

Transformer Standard current transformer are also called precision current transformers, current transformer standards, standard CT and current transformer standards. Transformer standards are divided into current transformer standards and voltage transformer standards. Standard current transformers are used in the error test of transformers. Used as a current transformer calibration standard



technical parameter

Temperature -5 40

Relative humidity 80%

Rated Primary Current 5-5000A 5A,1A

Rated secondary current 5A 1A

Accuracy Class 0.05S
Allow long-term work under the rated current; More than120A across the core.



Precautions

The current of standard CT and tested CT must be the same in CT calibration.

Follow the given wiring diagram strictly.

Test whether the load box is accurate or not before calibrating the transformer.

Forbid secondary winding opening during the calibration.

Select demagnetization before calibration.The wiring diagram is shown in figure 5.

Short out the secondary winding before cutting off the power when the demagnetization is finished.

Principle wiring diagram of CT with large current generator is similar to above diagram. They are the same except the output winding of large current generator and primary winding of transformer are the same one.