Electronic multi-frequency withstand voltage devices play a key role in the insulation performance detection of electrical equipment, and their application scenarios are extensive and important. The following describes its typical application scenarios in detail from multiple dimensions around its core functions and application requirements:
1. Transformer insulation performance detection
① Longitudinal insulation (turn-to-turn/layer-to-layer/segment-to-segment) test
Scenario description: There may be defects such as turn-to-turn short circuit and weak interlayer insulation inside the transformer winding. Traditional power frequency withstand voltage test is difficult to detect such longitudinal insulation problems.
Solution: Apply high voltage through a multi-frequency power supply (such as 100Hz, 150Hz) to increase the induced electromotive force of the winding synchronously, effectively exposing longitudinal insulation defects.
② Full insulation and graded insulation transformer testing
Scenario description: Graded insulation transformers (such as the neutral point on the high-voltage side is not directly grounded) need to perform differentiated withstand voltage tests for different windings.
Solution: The device can output different frequencies and voltages, and flexibly adapt to the testing needs of full insulation or graded insulation transformers.
2. Transformer Induction Withstand Voltage Test
① Voltage Transformer (PT) Longitudinal Insulation Test
Scenario Description: PT winding interturn insulation defects may cause abnormal secondary output, affecting metering and protection accuracy.
Solution: Use multi-frequency test voltage to detect the insulation performance of PT winding at high frequency to ensure that it meets standard requirements.
② Current Transformer (CT) Magnetic Circuit Insulation Test
Scenario Description: CT magnetic circuit insulation defects may cause core saturation or local overheating, affecting equipment life.
Solution: The device can apply high-frequency test voltage to detect the reliability of CT magnetic circuit insulation to avoid failures during operation.
3. GIS (Gas Insulated Switchgear) AC Withstand Voltage Test
① GIS Overall Insulation Performance Detection
Scenario Description: GIS contains circuit breakers, disconnectors, busbars and other components, and an overall AC withstand voltage test is required to verify the insulation performance.
Solution: The device can output high-voltage, multi-frequency test power supply to simulate the overvoltage situation of GIS in operation and detect its insulation strength.
② GIS local defect detection
Scenario description: There may be local defects such as metal particles and insulator cracks inside the GIS, which are difficult to detect with traditional power frequency tests.
Solution: Use multi-frequency test voltage to enhance the local discharge signal, and cooperate with the local discharge detector to accurately locate the defect position.
4. Generator insulation performance detection
① Stator winding longitudinal insulation test
Scenario description: Insulation defects between turns of the generator stator winding may cause phase-to-phase short circuit during operation, causing significant losses.
Solution: The device can apply high-frequency test voltage to detect the insulation performance of the stator winding at high frequency to ensure that it meets the operating requirements.
② Rotor winding insulation test
Scenario description: Rotor winding insulation defects may cause the generator to vibrate or burn, and regular inspections are required.
Solution: Use multi-frequency tests to detect the insulation strength of the rotor winding at high frequency to avoid failures during operation.
5. Insulator and cable withstand voltage test
① Insulator AC withstand voltage test
Scenario description: Insulators need to withstand overvoltage during operation, and AC withstand voltage tests are required to verify their insulation performance.
Solution: The device can output high voltage and multi-frequency test power supply to simulate the overvoltage of the insulator during operation and detect its insulation strength.
② Cable AC withstand voltage test
Scenario description: The cable may be subjected to overvoltage shock during operation, and an AC withstand voltage test is required to verify its insulation performance.
Solution: Through the multi-frequency test voltage, the insulation performance of the cable at high frequency is detected to ensure that it meets the operation requirements.
6. Switchgear and lightning arrester test
① Switchgear insulation performance detection
Scenario description: Switchgear (such as circuit breakers and disconnectors) needs to be tested for insulation performance to ensure its reliable operation.
Solution: The device can output high voltage and multi-frequency test power supply to simulate the overvoltage of the switchgear during operation and detect its insulation strength.
② Lightning arrester power frequency reference voltage test
Scenario description: The lightning arrester needs to be tested for power frequency reference voltage to verify its nonlinear characteristics.
Solution: Through the multi-frequency test voltage, the power frequency reference voltage of the lightning arrester at high frequency is detected to ensure that it meets the standard requirements.
7. Other electrical equipment tests
① Capacitor and reactor test
Scenario description: Capacitors and reactors need to be tested for insulation performance to ensure their reliable operation.
Solution: The device can output high-voltage, multi-frequency test power supply to simulate the overvoltage of capacitors and reactors during operation and detect their insulation strength.
② Power electronic equipment test
Scenario description: Power electronic equipment (such as frequency converters and inverters) need to be tested for insulation performance to ensure their reliable operation.
Solution: Use multi-frequency test voltage to detect the insulation performance of power electronic equipment at high frequencies to ensure that it meets the operating requirements.
The ZC-506 multi frequency induction withstand voltage test device is controlled by a microcomputer and designed and manufactured using digital waveform synthesis technology and modern power electronics technology. It has higher working efficiency, stable output voltage, high measurement accuracy, and good repeatability than traditional triple frequency generators.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com
