KDZD300A cable outer sheath loop current grounding tester is applicable to the following specific measurement scenarios:
Detection of substation cable grounding system
Measure the circulating current of the metal sheath of high-voltage cable (such as aluminum sheath and copper shielding layer) in the single-end or cross interconnection grounding mode, and judge whether there are multipoint grounding, insulation damage or poor grounding faults.
Plant service power and transmission cable monitoring
Regular patrol inspection shall be carried out for the grounding current of the outer sheath of the power cable at the outlet of the generator, the low voltage side of the main transformer and the plant power distribution system to prevent cable overheating, insulation aging and other problems caused by large loop flow.
Operation and maintenance of urban underground cable tunnel/pipe gallery
Quickly detect the outer sheath grounding current and harmonic components of densely laid cables without interrupting the power supply, and evaluate cable operation and grounding system integrity.
Cable line fault diagnosis and preventive test
By measuring the circulating current, harmonic content (maximum 25 times), total harmonic distortion rate (THD) and other parameters, it can help judge the insulation deterioration of cable sheath, abnormal induced voltage or abnormal grounding circuit.
Analysis of harmonic interference
In places with nonlinear load (such as frequency converter and rectifier equipment), detect harmonic and inter-harmonic current in cable grounding circuit and evaluate its impact on system safety.
Leakage current and frequency monitoring
It is used to troubleshoot the leakage current to the ground caused by the damage of cable outer sheath, and monitor the system frequency stability (20Hz~400Hz wide frequency range, power frequency 45~65Hz high accuracy).
With non-contact, high anti-interference, portable and durable characteristics, the equipment is especially suitable for power operation and maintenance personnel to carry out fast, safe and accurate live detection and state evaluation on site.
This instrument is a multi-functional measuring instrument, equivalent to four conventional test instruments: active transformer capacity tester+transformer characteristic parameter tester+transformer DC resistance tester+transformer material analyzer. It can accurately measure a series of power frequency parameters such as material, capacity, type, no-load current, no-load loss, load loss, impedance voltage and DC resistance of various transformers.
This product has many advantages such as small size, light weight, high measurement accuracy, good stability and simple operation. It can completely replace the previous method of measuring transformer loss and capacity with multi-meter method. The wiring is simpler, the testing and recording are more convenient, and your work efficiency is greatly improved.
KDHG-220P Variable Frequency Transformer Characteristics Comprehensive Tester
Efficient and accurate power equipment testing solution
Application Applications
Power system maintenance and overhaul
Provide comprehensive performance evaluation for current transformers (CT) and voltage transformers (PT) in substations, including parameter testing of volt ampere characteristics, transformation ratio, polarity, etc., to ensure the stable operation of the power system.
Suitable for regular inspection and maintenance of various protection, metering, TP CT, and electromagnetic unit PTs, improving the safety and reliability of the power grid.
New equipment acceptance and debugging
When constructing or upgrading power facilities, it is used to conduct detailed pre factory testing on newly installed CT and PT to ensure compliance with national and international standards (such as GB20840.1, IEC60044-1).
Provide accurate error curve analysis to help engineers determine whether the equipment meets design specifications and ensure the quality and performance of new equipment.
Research and Education
As a teaching and research tool in universities and research institutions, it is used for experimental courses and scientific research projects in electrical engineering majors to help students and researchers gain a deeper understanding of the working principles and testing methods of transformers.
Support secondary winding resistance measurement, AC load testing, and other functions to meet the detailed research needs of transformer characteristics in laboratory environments.
industrial applications
In industrial production environments, in order to ensure the safe operation of large electrical equipment, the status of transformers is regularly monitored to prevent potential failures and reduce the risk of power outages.
The lightweight design is easy to carry to the site for use, especially suitable for scenarios that require frequent mobile operations, such as equipment testing in remote locations such as wind farms and hydropower stations.
It not only meets the test requirements of excitation characteristics (i.e., volt-ampere characteristics), transformation ratio, polarity, secondary winding resistance, secondary load, ratio difference and Angle difference of various CTS (such as protection type, metering type, TP type), but also can be used for the test of excitation characteristics, transformation ratio, polarity and secondary winding resistance of various PT electromagnetic units.
The device adopts high-performance DSP and ARM manufacturing technology to ensure stable and reliable performance, complete functions, high degree of automation, high test efficiency, and is a professional test instrument for transformers in the power industry.
Only a simple digital setting is required: set the rated parameters of the transformer. The instrument will automatically record the data of the whole process, and automatically calculate and display the ratio polarity, volt-ampere characteristic curve, etc., eliminating the tedious labor of line change, manual voltage regulation, manual recording, sorting, and curve description.
KDHG-A transformer comprehensive tester is a kind of multifunctional field test instrument specially designed for measuring transformer: volt-ampere characteristics, ratio, polarity, error curve, calculating inflection point and secondary side loop inspection.
1. Maintenance and overhaul of the power system
2. Design and installation of power system:
3. Power experiment and testing
4. Education and training
The wireless secondary voltage drop/load tester is an intelligent wireless testing instrument designed and developed by our company to automatically test the se
Transformer comprehensive tester is a multifunctional on-site testing instrument designed specifically for testing the volt ampere characteristics, transformati
A new generation of innovative CT and PT testing instruments has been developed based on the traditional transformer volt ampere characteristic transformation r
Equipped with a large capacity memory, it can store 2000 sets of test data, and data will never be lost in case of power failure;
Single machine integration, lightweight, weighing only 8.2Kg, easy to carry, convenient for mobile testing;
Automat
The PT excitation characteristic tester is an enhanced excitation characteristic tester launched by our company. The instrument adopts good high-speed microproc
