Negotiable
The date of payment from buyers deliver within days
Hubei
Long-term effective
2023-06-24 06:06
387
Company Profile
Wuhan UHV Power Technology Co.,Ltd.By certification [File Integrity]
Contact:uhv978645(Mr.)
Email:
Telephone:
Phone:
Area:Hubei
Address:Hubei
Website:http://www.uhvtest.com/ http://uhv978645.jinlvye.net/
UHV(H) Power Frequency AC Series Resonance Test System for CVT Calibration
Â
Â
Â
I. Scope of test article and requirement:
XZB-360kVA/360kV Adjustable Inductance Series Resonant Withstand Voltage Device for CVT can be used for:
(1) 500kV Electromagnetic Transformer, CVT , capacitance:0.004-0.008uF, test frequency is 50hz, test voltage is no more than 360kv.
(2) 220kV Electromagnetic Transformer, CVT , capacitance:0.006-0.01uF, test frequency is 50hz, test voltage is no more than 160kv.
(3) 110kV Electromagnetic Transformer, CVT , capacitance:0.016-0.024uF, test frequency is 50hz, test voltage is no more than 80kv.
Â
II. Working environment
Ambient temperature |
- 15 ℃ ~ + 55 ℃ |
Relative humidity |
≤ 60% (25 ℃) |
Working frequency |
50 Hz ± 0.5 Hz |
Relative humidity |
≤ 60% RH; |
Altitude |
≤ 1000m; |
Â
III. Main technical parameters and functions of the device
Rated capacity |
360KVA; |
Input power supply |
380V, frequency is 50 Hz; |
Rated voltage |
360kV; |
Rated current |
1A; |
Working frequency |
50 Hz; |
Waveform distortion rate |
output voltage waveform distortion rate ≤ 1%; |
Working time |
5 min continuous under rated load; 1.1 times over voltage for 1 min; |
Temperature rise |
temperature rise ≤ 65K after continuous operation for 5min under rated load; |
Quality factor |
the device itself Q ≥ 10 (F = 50 Hz); |
Measurement accuracy |
System RMS 1.5 level; |
Â
IV.System parameters
Excitation Transformer JLB-20kVA 5/10/20kV/0.4kV 1pc
Rated capacity |
20kVA |
Working power supply |
380±10%V (three-phase) |
The output voltage |
5kV, 10kV, 20kV |
Structure |
Dry Type |
Gross Weight |
75 kg |
Â
AC Variable Frequency Control Console XZB-20KVA/380V 1pc
The output capacity |
20kVA |
Working power supply |
380±10%V (three-phase), power frequency |
The output voltage |
0-400V |
Rated input current |
50A |
Rated output current |
50A |
Working time |
Continuous 5min at rated capacity |
Temperature rise |
Continuous 5min at rated capacity, ≤65k |
Noise level |
≤50dB |
Weight |
18kg |
Â
Adjustable High Voltage Reactor DK-45kVA/45kV 8pc
Rated Capacity |
45kVA |
Rated Voltage |
45kV |
Rated Voltage |
1A |
inductance |
140-300H/single section |
The quality factor |
Q≥10(f=50Hz) |
structure |
Dry type |
Weight |
About 55kg |
Â
Capacity Divider HTFY-500pF/400kV 1pc
Rated voltage |
400kV |
High piezoelectric capacity |
500pF |
Dielectric loss |
tgσ≤0.5% |
Voltage division ratio |
4000:1 |
measurement accuracy |
Valid value of 1.5 |
Dimension (Inner Height) |
Single stage ∅140×1210,2 stages in total |
Weight |
70 kg |
 Nickname: CVT Resonance Test; Power Frequency Resonance Test; AC Resonance Test for CVT; CVT Calibration Test
Â
Â
Â
Â
1. Due to the full compensation of resonant reactive power, the power of the power supply and equipment is only less than 1/10 of the capacity required by the test product (1/Q>10); The same capacity is small in size, light in weight, the output capacity of the device is large and the power capacity of the required configuration is small, the price is low, and the operation is convenient and safe;
2. The series resonance is actually a current filter loop, so that the current passing through the test product is basically the fundamental current, and the waveform distortion rate (THD) of the output voltage is extremely small, which is better than all types of existing AC withstand voltage equipment;
3. The short-circuit current after flashover or breakdown of the sample is only less than 1/10 of the test current before the short circuit (1/Q), which can effectively prevent the expansion of damage to the fault point after breakdown;
4. Immediately after flashover, the arc is automatically extinguished, and the process of restoring the resonant state voltage establishment after arc extinguishing is long (seconds) is a steady-state establishment process, and there is no concern about voltage overshoot, nor the danger of recovery overvoltage in the microsecond-level millisecond-level transient process.
Â
Â
Â
Â
Â
Â
Â
Q: What is a capacitor voltage transformer CVT or CCVT construction and working?
A: Capacitor Voltage Transformer (CVT) or Capacitor Coupled Voltage Transformer (CCVT) is a switchgear device used to convert high transmission class voltage into easily measurable values, which are used for metering, protection, and control of high voltage systems.
Q: What is CVT calibration data?
A: CVT data are figures which are determined in one of the final routine tests in factory and stored in SCEM board of N, U, W, RL series. For E series, it is stored inside the ADVC3 controller which is paired with the switchgear at time of the CVT calibration tests are conducted.
Due to manufacturing errors of electronic components and bushings, CVT data is unique to every bushing and SCEM (where installed) combination.
Therefore, for N, U, W and RL series replacement of SCEM may cause voltage readings to be incorrect. In such cases, voltage measurement can be recalibrated by first reloading the latest CVT data file, then adjusting voltage reading using the Calibration menu on WSOS software. Refer to the on-site CVT Calibration procedure for more information.
Â
http://www.uhvtest.com/