YHXZB-180kVA/60kV Variable Frequency Series Resonance Withstand Voltage Test Device Technical Proposal

1. Basic Principles of Series and Parallel Resonance:

1.1 Resonance withstand voltage testing utilizes the inductance of the reactor and the capacitance of the test object to form an LC series circuit. By adjusting the output voltage frequency of the variable frequency power supply, series and parallel resonance is achieved, obtaining high voltage on the test object. This is a new method in high voltage testing, highly praised by experts, and has been widely used domestically and internationally.

2. Characteristics of the Series and Parallel Resonance Test Device:

2.1 The series and parallel resonance test device features large output capacity, high output voltage, and allows arbitrary combination of reactors for AC withstand voltage tests on different test objects.

2.2 The series and parallel resonance test device is compact and lightweight, making it especially convenient for field testing.

2.3 The series and parallel resonance test device has excellent protection functions, including overvoltage protection, overcurrent protection, time protection, flashover protection, overheat protection, and module protection.

2.4 The series and parallel resonance test device is extremely simple to operate and features both manual and automatic modes.

2.5 The series and parallel resonance test device uses a large screen, making test data clear at a glance, and can print test results.

2.6 The series and parallel resonance test device ensures no overvoltage after test object breakdown, causing minimal damage to the test object.

2.7 The series and parallel resonance test device requires a small power supply capacity, only a fraction of that needed for power frequency transformer testing, solving the problem of difficult-to-find power sources on site.

3. Applicable Scope of the Equipment

3.1 Suitable for AC withstand voltage testing of 300mm2/10KV cables up to 3 kilometers in length.

4. Standards Referenced and Implemented in Equipment Manufacturing

DL/T849.6—2004      《High Voltage Resonance Test Device》

GB 6450—1986        《Dry-type Power Transformers》

DL/T848.2—2004      《Test Transformers》 

GB/10229—1988       《Reactors》 

GB/T11920—1989      《General Technical Conditions for Control Devices》

GB/T16927.1—1997    《High Voltage Test Techniques》

IEC358—1990         《Coupling Capacitors and Capacitor Dividers》

GB311.1              《Insulation Coordination for High Voltage Transmission and Distribution Equipment》

DL/T846—2004        《General Technical Conditions for High Voltage Test Equipment》

Q/CSG10007—2004    《Preventive Test Procedures for Power Equipment》

GB7328—87          《Measurement of Sound Level of Transformers and Reactors》

DL474.4—1992      《AC Withstand Voltage Test》