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Power Frequency AC Resonant Withstand Voltage Test Set , For EHV CVT and CB Rutine Testing
I. Product Description :
CHX-(L) series HV induction regulation series resonance test system is mainly used for power frequency voltage withstand test of HV voltage electrical equipment ,special for quality testing of science research and power equipment manufacturer.Compared with traditional power frequency test transformer system with the same specification, this kinds of test system needed power supply capacity for test system
is smaller, waveform distortion smaller, higher Q value, smaller size, wider range of test objects.
II. Appication object
AC hipot routine test for GIS,CT ,circuit breaker,bushing,insulator,insulating tools,busbar with voltage class no more than 500KV.
Can perform PD detecting test during voltage rise up when equipped with Partitial discharge tester.
AC hipot routine test for GIS, CT, breaker, casing pipe, insulators, insulation tools, bus and so on with voltage of above 110kV
III. Main Components:
Resonance Control console
Electric voltage regulator cabinet
Excitation transformer
Variable inductance reactors with modular type
Coupling voltage divider
IV. Key features
The test power source,capacitor,size and weight needed are just 10% that of conventional test transformers
High quality factor and test automation degree, complete protection function of over current,over voltage and flash-over
ldeal test waveform, little waveform distortion
Infinitely variable control induction used by reactor, complex resonance can be reached at any point of in testing range.
The reactor is equipped with reliable air gap limit switch and air gap indicator scale and sensor, inductance gap of iron core can be read directly on controlling panel.
The reactor returns to air gap initial position after test finished.
Phase sequence backup protection is installed in transmission gear which will prevent from damage.
PD free designing of the system, small quantity of partial discharging itself.
V. General Technical data:
Mode of resonant circuit: Series resonant with variable inductance
System model : made by order
Input power supply : 380±10%(single-phase),50Hz/60Hz
Rated output capacity: made by order
Rated output Voltage:no more than 800KV
Rated output current: made by order
PD level itself: no more than 10pC
Reg. Freq range : 50/60Hz
Output Resonance voltage waveform: pure sine wave
THD of output waveform: ≤1%
Insulation level: Under 1.1 times and keeping 1min, normal
Duty cycle : 30mins on under rated current working condition ;
Quality factor of test set itself: Q≥30 ;
Temperature rise: Less than 65K under rated current working 30mints;
Noise level: No more than 65dB
Reactor Structure: oil-immersed with iron tank type ,adjustable inducatance
VI. Technology Advantage
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.
With large output capacity and small power capacity, low cost, easy to operate and keep safe.
Typical current filter circuit, the output voltage distortion (THD) is very small
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.
Auto blowout the arc after flashover, it is a long and stable process to recover the serial resonant voltage, safe.
VII. Function
Remote control and indication 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.
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.
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.
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.
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.
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.
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.
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.
VIII.Accessories
Accessory box for storage accessoires
Connection cables of control console and Voltage regulator
Connection cables of voltage ragulator and exciting transformer
Output cables of exciting transformer
System grounding cables
Parallel cables of the reactor
HV output cables(reactor to divide,divider to test object)
HV measuring cables ( the signal output cables of voltage divider )
A final test report, a quality Certificate ,a user manual and a packing list are offered .
IX. Optional model
Model
Rated voltage
Rated output current
Rated output capacity
Application for turbine generator or thermal power generator
Suntech Power Group is one of the largest Procurement, Engineering & Contracting Group companies in China.Our group branch company and factory have already engaged
in the field of electric power more than 26 years.
1.Steel structure industry especially steel towers and related pr... Suntech Power Group is one of the largest Procurement, Engineering & Contracting Group companies in China.Our group branch company and factory have already engaged
in the field of electric power more than 26 years.
1.Steel structure industry especially steel towers and related pr...
