GDTF-88kVA/22kV AC Resonant Hipot Test System for Cables
II. Working Environment
Environmental temperature: -10ºC to 50ºC
Related humidity: ≤ 90% RH
Altitude: ≤ 1000m
III. Technical Data
Rated capacity: 88kVA
Input power supply: Single phase 220V/Three phase 380V; 50Hz
Rated voltage: 22kV
Rated current: 4A
Working Frequency: 30-300Hz
Output waveform: sine wave
Waveform distortion rate: ≤1%
Working time: constant working of 5mins under rated load. Working of 1min, under 1.1 times of rated voltage
Temperature rise: ≤65K after constant working of 5mins under rated load
Quality factor: Q ≥30(f=45Hz)
Protective function: Over-current, over-voltage and flashover protections for test object.
Accuracy: 1.5% (RMS)
IV. Applied standard
GB10229-88 Reactor GB1094 Power transformers GB50150-2006 Standard for hand-over test of electric equipment installation engineering DL/T 596-1996 Preventive test regulation of electric equipment GB1094.1-GB1094.6-96 Protection class of Shell GB2900 Electro-technical terminology GB/T16927.1~2-1997 High voltage Testing Technique
2. Variable frequency power supplyGDTF -6kW/220/380V (1 set)
Rated output capacity: 6kW
Working power supply: 220/380±10%V(single/3-phase), power frequency
Output voltage: 0-400V, single phase
Rated input current: 15A
Rated output current: 15A
Voltage resolution: 0.01kV
Voltage measuring accuracy: 1.5%
Frequency adjusting range: 30-300Hz
Frequency adjusting resolution: ≤0.1Hz
Frequency stability: 0.1%
Working time: constant working of 5mins under rated capacity.
Temperature rise: ≤ 65K after constant working of 5mins under rated capacity.
Noise: ≤50dB
Weight: approx. 10kg.
It can realize below functions,
The Variable frequency power supply can be placed in lengthways and in horizontal, suitable for on-site operation.
b. High stability and reliability. With robust aluminum case and damping rubber support leg, easy for transportation.
c. Touch screen LCD display, or external mouse can be connected. It shows below parameters, Resonance voltage(target voltage), test frequency, measurement frequency, LV voltage, LV current, Withstand voltage time, over-voltage and over-current protection, flashover protection, voltage boosting and timing, operation mode switching, capacitance/inductance/frequency calculation, parameter query, frequency curve and voltage curve.
d. Parameters setting and selection Starting frequency, end frequency, starting voltage, voltage boosting and timing, voltage divider ratio measurement, exciting transformer ratio, over-voltage and over-current protection, flashover protection, test mode, capacitance/inductance/frequency calculation, prompt and help.
e. Test mode: touch screen/external mouse operation, Auto/Semi-auto/Manual and other modes selection.
f. Protection function and information tips HV over-voltage protection, LV over-current, over-current protection and Non-resonance protection, zero and flashover protection, emergency stop, low voltage protection.
g. Data storage function: Test result save(manual save), print, upload and return. 1) 50pcs test results can be saved.
The saved data can be showed on the screen. With USB port, data can be output to print or printed directly by the equipment.(If buyer need this requirements, please specify it on the contract.)
h. Auto stabilivolt function. Voltage stability up to 1.0%.
i. Frequency adjusting range and resolution can be set. Frequency adjusting range can be set at 30-300Hz, 45-100Hz, 200-300Hz as requirements. Frequency resolution can be set at 0.1Hz, 0.2Hz, 0.5Hz, or 1.0Hz. Obtain optimized balance between efficiency and accuracy of harmonic adjusting.
j. Coarse tuning and fine tuning for frequency.Search resonance point automatically.
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