Secondary Depressurization Winding Resistance CT PT Instrument Transformer

• Customization: Available
• Warranty: 1 Year
• Relative Humidity: ≤ 80%
• Ambient Temperature: - 10 ºC~ 40 ºC
• Host: 32cm * 24cm * 13cm
• Power: Electronic
• Customized Support: OEM, ODM, Obm
• Transport Package: Carton or Wooden Case
• Trademark: KDZD
• Origin: Hubei, China
• HS Code: 9030332000
• Production Capacity: 5000

Product Description

 

1. Operating environment
(1) Ambient temperature	- 10 ºC~ 40 ºC
(2) Relative humidity	≤ 80%
2. Measurement accuracy
The measuring accuracy of this instrument is Level 1.
Ratio difference	Δ f =±(1% × f+1% ×δ) ±0.01(%)
Angle difference	Δδ= ±(1% ×δ+ 1% × f) ± 1 (min)
Conductivity value	G=± (1% × G+1% ×δ ±0.01) mS
Electrical susceptance	δ= ± (1% ×δ+ 1% × G±0.01)mS
Load	S=± (1% × S±0.1)VA
Resistance	R=± (1% × R+1% × X±0.1)Ω
Reactance	X=± (1% × X+1% × R±0.1)Ω
3. Charging power supply	AC 176V~264V, frequency 45-55Hz
4. Insulation
(1) . The insulation resistance of the voltage and current input terminals to the enclosure is ≥ 100MΩ.
(2) The working power supply input end bears power frequency 2kV (effective value) between the shell, and the test lasts for 1minute.
5. Battery working time	more than 6 hours after full charge.
6. Volume
Host	32cm × 24cm × 13cm
Extension	32cm × 24cm × 13cm
7. Weight
Host	2.5Kg
Extension	2Kg

 

Products Overview
The excessive comprehensive error of electric energy metering is a key problem in electric energy metering. The measurement error caused by the secondary circuit voltage drop of voltage transformer is often the biggest factor affecting the comprehensive error of electric energy measurement. The error caused by the secondary voltage drop of voltage transformer refers to the percentage of the amplitude difference of the voltage between the secondary terminal and the load terminal of the voltage transformer relative to the actual secondary voltage, and the general term of the phase difference between the two voltages. The traditional test method is that a device uses a long test line to detect the voltage at PT side and meter side at the same time. Because the test line is too long, it is easy to cause the PT secondary short circuit, which is a very dangerous fault.

The wireless secondary voltage drop/load tester is a new intelligent wireless testing instrument designed and developed by our company to automatically test the secondary voltage drop/load of voltage transformer. It completely replaces the conventional secondary voltage drop/load tester and avoids the occurrence of PT secondary short circuit to a large extent. It creates good conditions for the safe operation of the substation. The instrument adopts non GPS wireless synchronization mode, without seeking stars, with fast test speed, and is not affected by terrain.

The instrument has the advantages of small volume, light weight, high measurement accuracy, good stability, simple operation and learning, simple wiring, convenient testing and recording, and greatly improves the working efficiency. It uses large screen LCD in the form of true color picture as the display window, graphical menu operation and Chinese prompts, a display interface with multiple parameters on one screen, friendly human-computer dialogue interface, simple and fast to use, and is the preferred product for power users at all levels.

Product parameters
1. The secondary voltage drop measurement of three-phase three wire or three-phase four wire voltage transformers is automatically completed through wireless mode. It is unnecessary to lay a long voltage test line from the instrument to the far end of the test, which can avoid unnecessary short circuit fault caused by long lines;

2. Non GPS synchronous mode, no star searching, fast and convenient to use.

3. Automatically calculate the ratio difference, angle difference and comprehensive error of three phases.

4. Automatically measure the load of secondary circuit of voltage and current transformer.

5. It can automatically detect and store the measurement error data caused by the test lead under various wiring modes, and automatically correct it in future tests.

6. The software correction function is specially designed to achieve accuracy correction without hardware adjustment, which can be verified on site by power test and research departments at all levels.

7. All electrical parameters are displayed on the same screen, and voltage, current, phase angle, power factor, active power, reactive power and apparent power can be measured; The oscillogram of each phase parameter can be displayed.

8. With harmonic measurement function, it can measure the harmonic content of voltage and current below 32 times.

9. Built in large capacity rechargeable battery pack, which can be powered by the battery pack in the instrument when there is no 220V AC power outdoors. Built in fast automatic charger, which can quickly charge the battery pack.

10. The battery remaining power percentage indication function is not a simple power loss alarm.

11. The large screen, high brightness true color LCD, full Chinese character graphical menu and operation prompts realize friendly man-machine dialogue, conductive silicone keys make operation easier, and wide temperature LCD with automatic contrast and brightness adjustment can adapt to winter and summer.

12. The user can print the test data through the micro printer at any time.

13. Test result storage function, which can store 200 groups of test data.

14. It is equipped with background management software, which can upload the storage records to the computer for unified management.