High Voltage Cross-linked Cable AC Withstand Voltage Test Equipment
Darui Electric recommends for you
Features:
1. Automatically searches for resonant frequency, automatically boosts voltage, reduces voltage, and times the withstand test. During automatic tuning, the system sweeps from 30Hz to 300Hz and finally locks onto the resonant frequency precisely.
2. Supports multiple test modes: "Auto Tuning + Manual Voltage Regulation", "Auto Tuning + Auto Voltage Regulation", "Manual Tuning + Manual Voltage Regulation", etc.
3. The system's human-machine interface is friendly: test parameter settings, test control, and test results are displayed on the same screen, intuitive and clear, with automatic timing and operation prompts.
4. Comprehensive protection functions. Overvoltage protection, overcurrent protection, flashover protection, and zero-position protection ensure system reliability.
5. The system uses imported power components, stable voltage and frequency output, reasonable electromagnetic compatibility design, and complete protection functions.
6. After multiple high-voltage direct-to-ground short circuit tests, the system remains intact and also has strong overload capability.
High Voltage Cross-linked Cable AC Withstand Voltage Test Equipment consists of a variable frequency power supply, excitation transformer, high-voltage reactor, and capacitive voltage divider. The capacitance of the test object and the reactor form a series resonant connection; the voltage divider is connected in parallel to the test object to measure the resonant voltage on the test object and serve as an overvoltage protection signal; the frequency-modulated power output is coupled to the series resonant circuit through the excitation transformer, providing the excitation power for series resonance. Professionally developed and produced, adopting a split design to greatly reduce labor intensity.
Main Technical Parameters of the Equipment
*Working power supply: 220V/380V, 50HZ *Test capacity: 30-30000KVA
*Test voltage: 1000KV and below *Resonant frequency range: 20-300Hz
*Test voltage waveform: sine wave, waveform distortion rate less than or equal to 0.3%
*Test voltage accuracy: level 1
*Frequency adjustment: 0.01Hz *Protection response time: less than 1 microsecond
*The system has overvoltage protection, overcurrent protection, discharge protection, breakdown trip protection, and overheat protection.
Notes
1. The High Voltage Cross-linked Cable AC Withstand Voltage Test Equipment should be used by professional high-voltage test personnel. Before use, carefully read the instruction manual and undergo repeated operation training.
2. There should be no fewer than 2 operators. When using the variable frequency series resonant test device, strictly adhere to the safety operation regulations for high-voltage tests of the unit.
3. To ensure the safety and correctness of the test, in addition to being familiar with this product manual, you must strictly follow national standards and regulations for test operations.
4. The connection lines of the variable frequency series resonant test device must not be connected incorrectly, especially the grounding wire. Otherwise, the test device may be damaged.
5. When using the variable frequency series resonant test device, the output is high voltage or ultra-high voltage, so it must be reliably grounded, and pay attention to operational safety.
6. If the voltage cannot be increased after power-on and returning to zero, press and hold the reset button for a long time (about 10 seconds), and ensure the indicator lights on the control panel are normal, i.e., no other red lights are on except for "High Voltage", then start normal operation.
7. When the voltage is greater than 10V and tuning has not been performed, the system will automatically detune to prevent high voltage from being generated upon resonance, which could harm the test object or even cause injury to personnel.
Main Applications
This equipment is mainly used for:
1. AC withstand voltage tests for 6kV-500kV high-voltage cross-linked cables
2. Power frequency withstand voltage tests for 6kV-500kV transformers
3. AC withstand voltage tests for GIS and SF6 switches
4. AC withstand voltage tests for generators
5. AC withstand voltage tests for other high-voltage power equipment such as busbars, bushings, and instrument transformers.
The complete set of equipment consists of a variable frequency power supply, excitation transformer, reactor, and voltage divider.
|
