Frequency Tuned Series Resonant Test Device

I. Scope of Application

The Variable Frequency Series Resonant Test System utilizes the principle of series resonance, employing an excitation transformer to stimulate the series resonant circuit. By adjusting the output frequency of the variable frequency controller, the inductance of the inductor in the circuit is adjusted.LNo Chinese content provided.CA series resonance occurs, and the resonant voltage is the voltage applied to the test item. The variable frequency resonance testing device is widely used in the power, metallurgy, petrochemical, and chemical industries, suitable for transfer and preventive testing of capacitive test items with large capacity and high voltage.

Section II: Key Performance Indicators and Features

2．1 Key Technical Indicators

(1)Ambient Temperature: -25～50℃

(2)Work Humidity: ≤90%

(3)Elevation: ≤2000m

(4)Power Supply:AC 220V  Single-phase50Hz

(5)Frequency Adjustment Range:20～300Hz

(Also, the frequency range can be adjusted according to customer requirements.)

（6System Measurement Accuracy:0.5Level

(7)Frequency Adjustment Resolution:0.01Hz；

Unsteadiness≤0.05%

(8)Output Waveform: Sine Wave

Waveform Distortion Rate≤0.5%

(9)Noise: ≤60dB

(10)ReactorQValue:30～200

2．2Key Features

2.2.1 Compact and lightweight, suitable for on-site use

Variable frequency controllers integrate voltage regulation, frequency adjustment, control, and protection functions into one unit, eliminating the need for bulky voltage regulators, and offering convenient operation and intuitive readings. Due to the systemQThe value is high.(30—120)Significantly reduced the constraints on field tests due to insufficient power capacity. When the voltage level is high, the reactor employs a multi-stage or stacked structure, facilitating transportation and on-site installation.

2.2.2 High installation reliability

Advanced design concepts and high-quality变频装置 are adopted.IGBTThe circuit design ensures minimal distortion in the output waveform and excellent stability in frequency output, boasting good performance.IGBTOvercurrent, overvoltage(The protection value can be manually set as required.)With discharge protection features, it ensures safety for both equipment and personnel; when the sample discharges or hits a dead end, due to the disruption of resonance conditions, the short-circuit current is small, only a fraction of the sample's test current.l/QPrevented damage to the test sample due to piercing.

2.2.3 The tested equivalent performance is good.

Adopting near-power-frequency(20Hz～300Hz)The applied voltage as the test power source, regardless of equivalence and consistency,50Hz/60HzOur power frequency sources are very close to each other, ensuring the reliability and authenticity of the test results.

2.2.4 Broad Application Scope

Equipment capable ofXLPEWaiting for power cable,GISCircuit breakers, switches, and variable frequency AC withstand voltage tests, as well as withstand voltage tests for large power generation sets, power transformers, current transformers, bushings, and other electrical equipment, can also be used for measuring ground resistance.

2.2.5 User-friendly and high-resolution adjustment

The system frequency is tuned to achieve optimal resonance, either through automatic tuning or coarse and fine adjustments, with a frequency adjustment range of30Hz～300HzFrequency resolution0.01HzDue to the proportional relationship between the sample capacity range and the square of the frequency range, the applicability is broad. The voltage regulation features both coarse and fine adjustments, allowing for a smooth and precise tuning to the desired voltage. During use, the user first tunes the voltage to the system resonance point at a low voltage, then increases the voltage amplitude to reach the required test voltage, making the operation convenient and reliable.

2.2.6 Flexible and convenient

The blue screen displays test data and status, along with real-time operation step prompts. It allows for flexible adjustment of test voltage, frequency range, voltage application time, and protective current. The test results can calculate the capacitance of the tested item. It features a computer communication interface for data communication and management with computers. It has a real-time time display and can store.200Group test data. Test results are printable.