Product Overview

The Variable Frequency AC Resonant Test System for GIS and Switchgear is designed for specified AC withstand voltage tests on compatible gas-insulated switchgear, circuit breakers, busbars, and related high-voltage electrical equipment.

GIS and switchgear testing may involve equipment with substantial capacitance, demanding voltage levels, and specific test connection requirements. A properly configured series resonant test system can generate the required AC voltage by tuning the reactor and test-object capacitance to resonance.

The equipment can be configured for laboratory testing, manufacturing quality assurance, substation commissioning, and other approved test applications.

Final equipment selection should consider the GIS or switchgear configuration, required test voltage, total capacitance, operating frequency, test duration, and applicable test standards.

Main Features

• Variable-frequency resonance technology.

• Configurable high-voltage output.

• Modular reactor configuration where applicable.

• Voltage measurement and monitoring.

• Configurable safety interlocks and protection functions.

• Optional automated resonance searching.

• Digital test parameter recording.

• Engineering support for laboratory and substation projects.

Testing Functions

GIS AC Withstand Testing

Supports specified AC withstand voltage tests on compatible gas-insulated switchgear assemblies and components.

Circuit Breaker Testing

Can be configured for suitable AC withstand tests on circuit breakers, according to the required test voltage and procedure.

Busbar and Connection Testing

Supports specified AC withstand testing of compatible busbars and related equipment.

Resonance Control

Adjusts operating frequency to establish resonance under the actual test configuration.

Test Monitoring

Provides the configured voltage and operating parameter monitoring needed for the test procedure.

Applications

• Gas-insulated switchgear manufacturers

• High-voltage circuit breaker manufacturers

• GIS installation and commissioning projects

• Substation acceptance testing

• High-voltage electrical laboratories

• Power utility maintenance departments

• Electrical engineering contractors

Buyer Concerns and Solutions

GIS configuration compatibility: Provide the equipment drawings or capacitance data, rated voltage, and test requirements so the proposed setup can be reviewed.

Limited on-site power: Series resonance can reduce input power requirements compared with direct high-power testing arrangements, depending on the actual load.

Multiple switchgear configurations: A modular system may support different configurations when the required electrical ratings and connection arrangements are suitable.

Safety and test control: The proposed scope can include suitable protection, interlock, grounding, and test monitoring functions.

Frequently Asked Questions

Q1: Can the system test GIS at different voltage classes?

Potentially, depending on the required test voltage, equipment capacitance, system capacity, and selected configuration.

Q2: Is the equipment suitable for on-site GIS testing?

Suitable configurations can be developed for on-site applications, subject to transport, installation, power supply, environmental, and safety requirements.

Q3: What information is needed for a GIS quotation?

Provide the GIS voltage class, test voltage, equipment capacitance if available, test arrangement, duration, and applicable standard.

Q4: Can the system test circuit breakers and busbars as well?

Yes, where the selected configuration meets the requirements of the individual test objects.

Q5: Can you provide automatic frequency tuning?

Automatic resonance searching can be discussed for configurations that support this function.

Q6: Can you provide a complete GIS testing package?

The supply can be configured to include the power supply, excitation transformer, reactor, voltage divider, control system, and agreed accessories.

Request a GIS and Switchgear Testing Solution

Send your GIS or switchgear specifications and required test parameters. We can review your application and prepare a technical proposal for the appropriate series resonant test system.