Payment & Shipping Terms:
|Test Principle:||Power Frequency Resonant Circuit||Usage:||AC Hipot Test For Large Generator Stator Or Rotor Winding|
|Design Feature::||Adjustable Inductance Test Reactor , 50Hz Or 60Hz Testing ,Dedicated To Large Hydroelectric Generator Stator Test||Component:||Control Console，Voltage Regulator，Excitation Transformer,Adjustable Inductance Reactor, Optional Load Compensation Load Reactor, And Voltage Divider|
|Test Frequency:||50Hz Or 60Hz||Duty Cycle:||10mints Or Made By Order|
|Test Accuracy:||No Less Than 1.0%||Output Waveform:||Pure Sine Wave|
|Special For:||AC Hipot Test For Large Hydro-generator Stator Or Thermal Generator Stator||Test Standard::||IEC60060-1:2010 ; IEC 60034-1:2004; IEEE 115:2009; GB/T 8564-2003; JB/T 6204-2002|
|Note:||PD Free Type Can Be Made By Order|
leakage current tester,
high voltage insulation tester
1. Application :
According to the relevant test standards from IEC and IEEE, at the time of overhaul or new erection of the generator , the stator winding of the large capacity hydroelectric generator or thermal power generator needs to conduct AC withstand voltage test at power frequency (50/60Hz) test frequency, so that to checking the insulation status of the winding.
The test set model CHX-3750KVA/65KV had been ordered and used by Xiangjiaba Hydropower Plant in China , which are used for conduct on-site AC withstand voltage test at power frequency (50Hz) test frequency for the stator of 800MW stand-alone capacity generator. The highest test voltage of this set is no more than 65KV; the max. testcucrent is no more than 57A. the duty cycle is no more than 10mints.
Until now , this test set had formed many different serialized model according to different votage withstand test applications .The alike model can see other typical model and typical at the following clause.
2. Main Components:
|SN||Name of Components||Type and specification||Qty.||Each weight||Each Dimension|
|1||Resonance Control console||DCG-L-400KVA/380V||1piece||25kgs||600*360*850mm|
|2||Electric voltage regulator cabinet||DT-400KVA/0~420V||1piece||2500kgs||1350*1350*1450mm|
|4.1||Variable inductance reactor||CHX(TL)-1500kVA/65kV||1piece||3500kgs||1450*750*1800mm|
|4.2||Fixed inductance reactor||FKDK-1125KVA/65KV||2pieces||800kgs||D480*H520mm|
|6||Special test accessories|
|Note : Special requirement can be made by order.|
3. Test priciple :
5.1 Technology Advantage of series resonant test circuit
5.2 Function and feature of this test set
① Remote test function for the iron-core gap of reactor:The gap sensor is installed in the reactor, which directly reads the iron-core gap on the console to guide operation. The gap limiting switch and indicator are also installed.
② Auto step down function when withstanding time is up:Withstanding timing adopts digimatic timer. When withstanding time is up, the system will auto step down.
③ Zero position close, zero start step up function:With zero limiting function. If the voltage regulator is not at zero position, then the HV output button cannot be closed, assuring the system step up from zero.
④ Over current protection:The system is with over current relay, which is of high anti interference, fast action, protection test object against over-current damage.
⑤ Over voltage and test object flash-over protection functions:This system takes electronic over voltage and flash-over protection board, protects test object against over voltage and flash-over. It is fast, stable and reliable, overcoming the instability, large discreteness and inconvenient adjustment of sphere-gap protection voltage. The setting of over voltage protection is manual adjustment, digital display, which is direct, convenient and accurate. The flash-over protection samples the accident variance of discharging signal falling delay, compares it with basic signal and determines. It is of high accuracy, avoiding possible mistake movement by accident variance of rising delay.
⑥ Real-time monitor function for test data:It is able to monitor HV side voltage, current and LV side voltage, current, which is more direct viewing the test status.
⑦ Digital display of circuit resonance and locking function when it is not of resonance and step up:
It can directly display the resonance status of the system by power factor. If the system is not at the resonant point, it must press close button to step up. When the system is adjusted to resonance, release the close button, click on the step up/down button to step up or step down.
⑧ Emergency stop :“Step on” emergency brake switch. Once there is abnormal conditions during test, step on this switch, the main power will be cut off right away to protect the safety of the testing personnel and the equipment.
6. General Technical data:
8.1. Other typical model for Hydroelectric generator and main performance from Fanke High-voltage
Rated capacity of generator
|Typical model supplied of test set||Country||Order Qty.|
|1||Three Gorges Hydropower Station||700MW Hydroelectric generator||CHX-L-2350KVA/55KV||China||2set|
|2||Gezhouba Hydropower Station||170MW Hydroelectric generator||CHX-L-1100KVA/40KV||China||2set|
|3||Xiluodu Hydropower Station||770MW Hydroelectric generator||CHX-L-2850KVA/55KV||China||2set|
|4||Xiangjiaba Hydropower Station||800MW Hydroelectric generator||CHX-L-3750KVA/65KV||China||2set|
|5||Wudongde Hydropower Station||850MW Hydroelectric generator||CHX-L-5100KVA/60KV||China||2set|
|6||Baihetan Hydropower Station||1000MW Hydroelectric generator||CHX-L-4800KVA/65KV||China||2set|
|7||SON LA Hydropower Station||400MW Hydroelectric generator||CHX-L-1125KVA/45KV||Vietnam||1set|
8.2. Other typical model just for turbine generator or thermal power generator
|Model||Rated voltage||Rated output current||Rated output capacity||Application for turbine generator or thermal power generator|
|CHX-L-250KVA/50KV||50KV||5A||250KVA||For 300MW and below generator stator|
|CHX-L-350KVA/50KV||50KV||7A||350KVA||For 600MW and below generator stator|
|CHX-L-600KVA/50KV||50KV||12A||600KVA||For 1000MW and below generator stator|
|Special requirement can be made by order|
9. On-site test standard table from IEC60034-1:2017 Rotating electrical machines - Part.1 :Rating and performance
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