Product parameters:
Suitable for large capacity, high voltage capacitive test and preventive test
Meet the test range:
1, 10kV/300mm² cable 3km AC voltage test, capacitance ≤1.1265μF, test frequency 30-300Hz, test voltage 22kV, test time 5min.
2, 10kV switch and other substation equipment AC withstand voltage test, the test frequency is 30-300Hz, the test voltage does not exceed 42kV, the test time is 1min.
3, 35kV/300mm² cable 1km AC voltage test, capacitance ≤0.1945μF, test frequency 30-300Hz, test voltage 52kV, test time 60min.
4, AC voltage withstand test of 35kV/31500kVA main transformer, capacitance ≤0.02μF, test frequency 45-65Hz, test voltage 68kV, test time 1min.
5, 35kV switch and other electrical equipment AC voltage test, the test frequency is 30-300Hz, the test voltage does not exceed 95kV, the test time is 1min.
Technical parameters:
Rated capacity | 135kVA |
Rated voltage | 27kV；54kV；108kV |
Rated current | 5A；2.5A；1.25A |
Measurement accuracy | System RMS level 1.5 |
Operating frequency | 30-300Hz |
Device output waveform | Sinusoidal wave |
Quality factor | Device Q≥30(f=45Hz) |
Waveform distortion rate | Output voltage waveform distortion ≤1% |
Input power supply | Single-phase 220 or three-phase 380V voltage, frequency 50Hz |
Working hours | Allow continuous 60min under rated load; Overpressure 1.1 times 1 minute |
Temperature rise | Temperature rise ≤65K after continuous operation under rated load for 60 minutes |
Protection function | Overvoltage, overcurrent, zero start, system mismatch (flashover) and other protection functions |
Ambient temperature | －20℃-55℃ |
Relative humidity | ≤90%RH |
Altitude | ≤3000m |
Feature:
The main functions and technical characteristics of the frequency-modulation resonance device of our company:
1, the device has overvoltage, overcurrent, zero start, system mismatch (flashover) and other protection functions, overvoltage and overcurrent protection value can be adjusted according to user needs, flashover protection action when the test product flashover and can record the flashover voltage value for test analysis.
2, the whole device single weight is very light, easy to use on site.
3, the device has three working modes: automatic mode, manual mode, automatic tuning manual boost mode; Convenient for users to flexibly choose according to the field situation, improve the test speed.
4, can store and remote print data, stored data number is a number, easy for users to identify and find.
5, when the device automatically sweeps the frequency starting point can be arbitrarily set within the specified range, the scanning direction can be selected up and down, and the LCD large screen displays the scanning curve, which is convenient for users to intuitively understand whether to find the resonance point.
6, the use of DSP platform technology, according to user needs to increase or decrease the function and upgrade, human-machine exchange interface is more humane.
7, the required power capacity is greatly reduced. Series resonant power supply is the use of resonant reactor and the test product capacitor resonance to produce high voltage and high current, in the whole system, the power supply only needs to provide the active power consumption of the system, so the power required for the test is only 1/Q of the test capacity.
8, the weight and volume of the equipment are greatly reduced. In the series resonant device, the bulky high-power voltage regulator and the ordinary high-power power frequency test transformer are omitted, and the resonant excitation power supply only needs 1/Q of the test capacity, which greatly reduces the weight and volume of the system, generally 1/10-1/30 of the ordinary test device.
9, effectively improve the output voltage waveform. The resonant power supply is a resonant filter circuit, which can improve the waveform distortion of the output voltage, obtain a good sinusoidal waveform, and effectively prevent the harmonic peak to the test product.
10, prevent large short circuit current burn fault point. In the series resonance state, when the insulation weakness of the test product is broken down, the circuit is immediately detuned, the loop current rapidly drops to 1/Q of the normal test current, and when the parallel resonance or test transformer is used for voltage resistance test, the breakdown current immediately rises dozens of times, compared with the two, the short circuit current and the breakdown current are hundreds of times different. The series resonance can effectively find the insulation weakness, and there is no large short-circuit current burn fault point worry.
11, No recovery overvoltage will occur. When the test product breaks down, due to the loss of resonance conditions, the high voltage also immediately disappears, the arc is immediately extinguished, and the re-establishment process of the recovery voltage is very long, it is easy to disconnect the power supply before reaching the flashover voltage again, the recovery process of this voltage is a kind of intermittent oscillation process of energy accumulation, its process is long, and there will be no recovery overvoltage.
