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Providing variable frequency resonance test equipment debugging services for Shanxi customers!
Publish time:
2021-03-23 11:03
Source:
Recently, after receiving an after-sales service request from a power construction company in Shanxi, Jindian Technology immediately dispatched technicians to the customer's location to provide on-site installation and operational training for the NR-BX-540kVA/270kV variable frequency resonant testing device purchased from our company.
Upon arriving at the site, our technicians first provided a detailed explanation of the theoretical knowledge and then guided the customer in practical operation.
NR-BX-540kVA/270kV variable frequency resonant testing device
Precautions
When using the excitation transformer, the high-voltage tail X must be grounded (already connected in the physical device). The grounding of the complete set of equipment must be grounded through the grounding terminal of the voltage divider and then connected to the ground grid of the test sample to ensure single-point grounding.
The excitation transformer can be used in series or parallel. The connection method is shown on the excitation transformer panel.
During use, all high-voltage wires should be straightened and suspended in the air (especially high-voltage silicone rubber wires) to avoid corona discharge to the ground.
Please strictly follow the wiring method specified in the manual. Otherwise, it will damage the equipment.
If the resonant point cannot be found and the voltage cannot be increased after the circuit is connected, it is likely that the loop is not connected. Check if the circuit is connected.
Test Operation Steps
(1) Test Preparation
Ø Determine the different reactor connection methods according to the different test voltage and current of the test sample, connect the test wiring according to the determined test wiring diagram, and check for errors.
Ø Check that the test equipment is complete and in good condition, and that the on-site safety measures are complete.
(2) Start the test
During the test, you can choose between manual test and automatic test methods.
Overvoltage protection check:
Example: When the test voltage is 12kV, the overvoltage protection will automatically be set to 1.1 times the test voltage (i.e., 13.2kV). When the test voltage reaches the set protection value, the instrument will automatically disconnect the main power output,
and provide an overvoltage protection prompt.
Note: If manual testing is used, the overvoltage protection setting value should be set to 1.1 times the actual test voltage.
Overcurrent protection check:
The user sets the overcurrent protection value. When the current reaches or exceeds the protection current, the system software and hardware will shut down and protect simultaneously, and pop up protection information to report the status when the overcurrent protection action occurs.
The maximum overcurrent protection setting value of this system excitation transformer does not exceed 40A.
Example: When the test current reaches the set protection value, the instrument should automatically disconnect the main power output and provide an overcurrent protection prompt.
Note: Low-voltage overcurrent protection setting: Set according to 2 times the current on the low-voltage side of the excitation transformer, with a maximum value not exceeding 3 times the rated value of the low-voltage side of the excitation transformer.
Debugging site
Through on-site test exchanges, our instruments worked normally, the accessories were complete, the on-site test results were accurate, the customer was very satisfied with our equipment and after-sales service, and expressed high recognition and appreciation for our company!
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