GPXZ-L power frequency resonance test system

resonance test system 1.better than traditional equipment in power capacity 2.device weight,measured waveform .

resonance test system,as the development of the electric system, the capacity of the equipment more and more larger, for example, the capacity of single machine of the thermoelectric generator group is more than 1000MW,  the capacity of single machine of the hydroelectric generator group is more than 800MW, if use traditional equipment (frequency test transformer ) , need large capacity, test transformer, voltage regulator are very heavy, it is not convenient for field test. Serial resonant system is better than traditional equipment in power capacity, device weight, measured waveform and cost. It is special designed for the AC voltage withstand test for hydroelectric generator which its single machine capacity ≤250MW.

Products features

1. Because the resonant system is reactive power full compensated, the power of the equipment and power is only less than 1/10 of measured equipment; with smaller volume and lighter compared with the equipment in same capacity. The device with large output capacity and small power capacity, low cost, easy to operate and safe.2. Serial resonant system actually is an current filter circuit, make the current which through it be fundamental current, the output voltage distortion (THD) is very small, better than all the AC voltage withstand equipments. 3.The short circuit current after flashover or breakdown is only less than 1/10 (1/Q) of the measured current, can effectively prevent the damage to fault point after breakdown.4. Auto blowout the arc after flashover, it is a long and stable process to recover the serial resonant voltage, safe.

Product parameters

Rated output voltage	≤0~60kV(AC effective value)
Output frequency	50Hz
Resonate voltage waveform	Sine wave, distortion ≤1%
Working mode	Full power continuous working time: 1min
Quality factor	10~40
Maximum measured capacity	≤3000kVA
Power supply	380V±15%, frequency:50Hz

Serial product and application:

Model	Application (AC voltage withstand test for generator which voltage ≤20kV,measured frequency: 50Hz)
	Control cabinet	Regulator	Reactor(dry type)	Excitation transformer (dry type)	Divider	Application
GPXZ-L-200/25	30kW	30kVA(electric)	200kVA/25kVadjustable 1 set	30kVA(dry type)	30kV	Hydroelectric generator0.4-1.0μF(10kV/40MW)
GPXZ-L-300/50	60kW	60kVA(electric)	300kVA/50kVadjustable 1 set	60kVA(oil immersed)	50kV	Thermoelectric generator0.27-0.33μF(20kV/300MW)
GPXZ-L-600/50	60kW	60kVA(electric)	200kVA/50kVadjustable 1 set400kVA/50kVadjustable 1 set	60kVA(oil immersed)	50kV	Thermoelectric generator0.113-0.45μF(20kV/600MW)
GPXZ-L-1200/50	120kW	120kVA(inductive)	200kVA/50kVfixed 2 sets 800kVA/50kVadjustable 1 set	120kVA(oil immersed)	50kV	Thermoelectric generator0.6-1.8μF(20kV/250MW)
GPXZ-L-2750/55	300kW	300kVA(inductive)	750kVA/55kVfixed 2 sets1250kVA/55kVadjustable 1 set	300kVA(oil immersed)	60kV	Thermoelectric generator1.6-3.3μF(20kV/770MW)

Note : make the solution according the measured equipment. reference table for capacitance of common hydroelectric generator:

Category	Parameters of the generator
	Rated capacity (MW)	Rated voltage (kV)	Phase capacitance (μF)
Hydroelectric generator	72.5~85	10.5	0.694
	125~150		1.8~1.9
	300	15.75	1.7~2.5
	400	18.0	2~2.5
	600		2.1~2.5

GPXZ-L power frequency resonance test system