2km Power Cable Variable Frequency Resonance Hipot Test Set

• Type: Universal Testing Machine
• Accuracy Grade: 1
• Load Way: Electronic Load
• Loading Method: Dynamic Load
• Display: Digital
• Control: Computer Control
• Model NO.: GDTF-88kVA-22kV
• Weight: 100-500Kg
• Power Source: AC380V
• Rated capacity: 88kVA, customized
• Input power supply: Three phase 380V; 50Hz
• Rated voltage: 22kV customized
• Rated current: 4A customized
• Transport Package: Standard Export Wooden Box
• Specification: ISO, SGS
• Trademark: HV Hipot
• Origin: Wuhan, China
• Production Capacity: 5000set/Year

Product Description

2km Power Cable Variable Frequency Resonance Hipot Test Set
 

I.Test Object and Requirement (denpend on customer's cable)

1. 6kv/185mm² cable AC resonant test, the cable length is 1.574km, capacity is below 0.61uF, the testing frequency is 30~300Hz, testing voltage is 15kv, the testing time is 5min
2. 10kv/185mm² cable AC resonant test, the cable length is 1.574km, capacity is below 0.61uF, the testing frequency is 30~300Hz, testing voltage is 22kv, the testing time is 5min

II. Working Environment
 

1. Environmental temperature: -10ºC to 50ºC
2. Related humidity: ≤ 90% RH
3. Altitude: ≤ 1000m

III. Technical Data
 

1. Rated capacity: 88kVA
2. Input power supply: Single phase 220V/Three phase 380V; 50Hz
3. Rated voltage: 22kV
4. Rated current: 4A
5. Working Frequency: 30-300Hz
6. Output waveform: sine wave
7. Waveform distortion rate: ≤1%
8. Working time: constant working of 5mins under rated load. Working of 1min, under 1.1 times of rated voltage
9. Temperature rise: ≤65K after constant working of 5mins under rated load
10. Quality factor: Q ≥30 (f=45Hz)
11. Protective function: Over-current, over-voltage and flashover protections for test object.
12. 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


V. Capacity Determination of the equipment

Designing two reactors, the single reactor is 44kVA/22kV/2A/55H, and the total capacity of the unit is 88kVA.

Verification:
1, 1.5kkm/185mm² cable 1.574km AC withstand voltage test, capacitance ≤0.61uF, test frequency 30-300Hz, test voltage 15kV, test time 5min.
If two reactors are connected in parallel, then L=55/2=27.5H, then:
Test frequency: f=1/2π√LC=1/(2×3.14×√27.5×0.61×10^-6)=38.86Hz
Test current: I=2πfCU test = 2π×38.86×0.61×10^-6×15×10³=2.23A.

2, 10kV/185mm² cable 1.574km AC withstand voltage test, capacitance ≤ 0.61uF, test frequency 30-300Hz, test voltage 22kV, test time 5min.
If two reactors are connected in parallel, then L=55/2=27.5H, then:
Test frequency: f=1/2π√LC=1/(2×3.14×√27.5×0.61×10^-6)=38.86Hz
Test current: I=2πfCU test = 2π×38.86×0.61×10^-6×22×10³=3.28A

The total capacity of this set is 88kVa, 2 pcs reactors, each reactor is 22kVA/22kV/2A/55H. The reactors used in parallel meets the testing requirements.
 

Reactors Test object	Reactors 22kVA/22kV 2pcs	Output voltage of exciting transformer
6kV185mm^21.574km length CABLE	2pcs reactors in parallel	1.5KV
10kV/185mm² 1.574km length CABLE	2pcs reactors in parallel	1.5KV

VI. Parameters for Individual Parts

1. Exciting Transformer  GDJL-6kVA/1.5kV/0.4kV   (1 set)
 

1. Rated capacity: 6kVA
2. Input voltage: 0-400V, single phase
3. Output voltage: 1.5kV
4. Type: Dry type transformer
5. Weight: approx. 35kg

2. Variable frequency power supply  GDTF -6kW/220/380V   (1 set)
 

1. Rated output capacity: 6kW
2. Working power supply: 220/380±10%V(single/3-phase), power frequency
3. Output voltage: 0-400V, single phase
4. Rated input current: 15A
5. Rated output current: 15A
6. Voltage resolution: 0.01kV
7. Voltage measuring accuracy: 1.5%
8. Frequency adjusting range: 30-300Hz
9. Frequency adjusting resolution: ≤0.1Hz
10. Frequency stability: 0.1%
11. Working time: constant working of 5mins under rated capacity.
12. Temperature rise: ≤ 65K after constant working of 5mins under rated capacity.
13. Noise: ≤50dB
14. Weight: approx. 10kg.

It can realize below functions,

1. 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.

1. 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.

3. HV Reactor  GDDK-44kVA/22kV (2pcs)

Rated capacity: 44kVA
Rated voltage: 22kV
Rated current: 2A
Inductance:48H (per set)
Quality factor: Q ≥30 (f=45Hz)
Type: Dry type
Weight: approx. 40kg

4. Capacitive Divider  GDFR-30kV/6000pF (1 set)
 

1. Rated voltage: 30kV
2. Capacitance: 6000pF
3. Dielectric loss: tgσ ≤0.5%
4. Divider ratio: 1000:1
5. Measuring accuracy: 1.5%
6. Weight: approx. 10kg