Ac withstand test for single hydrodynamo with capacity of 250MW or less
With the development of power system, the capacity of running equipment is increasing. For example, Thermal generator group, the single capacity has exceeded 1000MW, and hydrodynamo group, the maximum capacity has reached 800MW. If traditional test equipment (power frequency test transformer) is used for the ac power frequency withstand Voltage test of these devices, the regulator is very bulky because of the large test capacity required, and the high-capacity test power supply is difficult to solve in the field, so the field test is extremely inconvenient. The Power frequency withstand voltage tester host, no matter from test Power supply capacity, equipment weight, the waveform and has advantages in such aspects as investment. The Power frequency withstand voltage tester host focuses on the potential of capacity of 250 mw and below hydrodynamo ac withstand voltage test of the design and manufacture.
product names：Power frequency resonance、Power frequency series resonance、Series resonance、Series resonant transformer、Series resonance test equipment、Adjustable frequency resonant voltage withstand device、Power frequency withstand voltage tester host
|Rated output voltage||0 ~ 60kV(effective value of AC) and below|
|Resonance voltage waveform||Pure sinusoidal wave, waveform distortion rate ≤1%|
|week||Full power continuous working time of 1min|
|Maximum test capacity||3000kVA and below|
|Working power supply||380V±15%、Power frequency 50 hz|
|Product model||console||Voltage regulator||reactor(dry)||Excitation variable(dry)||Voltage divider||Scope of application|
|HTXZ(L)- 200kVA/25kV||30kW||30kVA(electric)||200kVA/25kV Adjustable one||30kVA dry||30kV||hydrodynamo。0.4～1.0μF。(10kV/40MW)|
|HTXZ(L)- 300kVA/50kV||60kW||60kVA(electric)||300kVA/50kV Adjustable one||60kVA oil-immersed||50kV||Thermal generator。0.27～0.33μF。(20kV/300MW)|
|HTXZ(L)- 600kVA/50kV||60kW||60kVA(electric)||200kVA/50kV Adjustable one
400kVA/50kV Adjustable one
|60kVA oil-immersed||50kV||Thermal generator。0.113～0.45μF。(20kV/600MW)|
|HTXZ(L)- 1200kVA/50kV||120kW||120kVA(induction)||200kVA/50kV Fixed two
800kVA/50kV Adjustable one
|HTXZ(L)- 2750kVA/55kV||300kW||300kVA(induction)||750kVA/55kV Fixed two
1250kVA/55kV Adjustable one
Note: the solution can be customized according to the parameters of test objects
|hydrodynamo||Nominal capacity(WM)||rated voltage(kV)||Phase capacitor(μF)|
1.The appearance of the product shall be subject to the actual product，Technical parameters with model if there are any changes，without notice。In case of misappropriation or copying, legal liability will be investigated.
1、Due to full compensation of resonant reactive power, the power of power supply and equipment is less than 1/10 of the required capacity of the subject (1/q10); Small size and light weight with the same capacity, large output capacity of the device and small power capacity required for configuration, cheap, convenient and safe operation.
2、Series resonance is actually a current filtering circuit, so that the current passing through the subject is basically the fundamental current, and the waveform distortion rate (THD) of the output voltage is very small, which is superior to all existing ac voltage withstand equipment.
3、The short circuit current of the sample after flashover or breakdown is only less than 1/10 (1/Q) of the test current before short circuit, which can effectively prevent the expansion of damage to the fault point after breakdown.
4、After flashover, the arc will be automatically extinguished immediately. The long (number of seconds) process of restoring resonant state voltage after arc quenching is a steady-state establishment process, and there is no danger of voltage overshoot and no danger of restoring overvoltage in microsecond millisecond transient process.
Enterprise products in strict accordance with international and national standards and rules of industry production, through the national, provincial and municipal electric power research institute and electric power authorities detection, measuring center, fully passed the ISO9001 international quality management system certification, the licence for manufacturing measuring instruments of the People's Republic of China, GB/T19001-2016 quality management system requirements, GB/T24001-2016 environmental management system requirements, GB/T28001-2011 occupational health and safety management system requirements.