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Overview of HTXZ series resonant device
The device has protection functions such as overvoltage, overcurrent, zero start, and system detuning (flashover). The entire device is lightweight an
Product details
Product IntroductionProduct Introduction
This device is mainly designed for AC withstand voltage testing of cross-linked cables, hydroelectric generators, main transformers, busbars, GIS, etc. It has a wide range of applications and is an ideal withstand voltage equipment for high-voltage testing departments and power installation and maintenance engineering units at the local, municipal, and county levels.
The device mainly consists of a variable frequency control power supply, an excitation transformer, a reactor, a capacitive voltage divider, and a compensation capacitor (optional).
Product Name: Series Resonance, Variable Frequency Resonance, Variable Frequency Series Resonance, Series Resonance Test Equipment, Series Resonance Voltage Endurance Device, Cable Voltage Endurance Series Resonance Device
Product ParametersProduct Parameters
working environment
| ambient temperature | －100oC-50oC |
| relative humidity | ≤90%RH |
| altitude | ≤1000m |
Main technical parameters and functions of the device
| Rated capacity | 324kVA |
| input power | Three phase 380V voltage, frequency 50Hz |
| rated voltage | 54kV |
| rated current | 6A |
| operating frequency | 30-300Hz |
| Device output waveform | sine wave |
| waveform distortion rate | Output voltage waveform distortion rate ≤ 1% |
| working hours | Under rated load, continuous operation for 60 minutes is allowed; Overvoltage 1.1 times for 1 minute |
| temperature rise | Temperature rise ≤ 65K after 60 minutes of continuous operation under rated load |
| Quality factors | The device itself has a Q ≥ 30 (f=45Hz) |
| protection function | Provide overcurrent, overvoltage, and flashover protection for the test sample (see the variable frequency power supply section for details) |
| measurement accuracy | Effective value of the system at level 1.5 |
Incentive Transformer
| Rated capacity | 9kVA |
| input voltage | 0-400V， single-phase |
| output voltage | 3kV |
| structure | dry-type |
| weight | About 50kg |
Variable Frequency Power Supply
| Rated output capacity | 18kW |
| working power supply | 380 ± 10% V (three-phase), power frequency |
| output voltage | 0-400V， single-phase |
| Rated input current | 45A |
| Rated output current | 45A |
| Voltage resolution | 0.01kV |
| Voltage measurement accuracy | 1.5% |
| Frequency adjustment range | 30-300Hz |
| Frequency adjustment resolution | ≤0.1Hz |
| frequency stability | 0.1% |
| runtime | Continuous 60 minutes at rated capacity |
| noise level | ≤50dB |
High voltage reactor
| Rated capacity | 54kVA |
| rated voltage | 27kV |
| rated current | 2A |
| Inductance | 68H/single section |
| Quality factors | Q≥30(f=45Hz) |
| structure | dry-type |
| weight | About 75kg |
capacitive voltage divider
| rated voltage | 60kV |
| High voltage electrical capacity | 2500pF |
| dielectric loss | tgσ≤0.5% |
| Voltage divider ratio | 1000：1 |
| measurement accuracy | Effective value level 1.5 |
| weight | About 10kg |
Note:
1. The appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice. If there is any act of theft or copying, legal responsibility will be pursued.
2. To learn more about Huatian products, please enter the product center. Service Hotline: 400-8855-448
HTXZ series
Cable AC voltage withstand series resonant device
HTXZ (L) series
Inductive power frequency series resonant withstand voltage device
HTXZ (W) series
Cable AC voltage withstand series resonant device
HTXZ (L) series
Inductive power frequency series resonant withstand voltage device
HTXZ (W) series
Non partial discharge variable frequency series resonant withstand voltage deviceXZB-H series
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Power frequency series resonant boost device (CVT)
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Product features
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Product Characteristics
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1. The device has protection functions such as overvoltage, overcurrent, zero start, and system detuning (flashover). The overvoltage and overcurrent protection values can be set according to user needs, and the flashover protection will be activated when the test sample flashover to protect the product.
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2. The entire device is lightweight and easy to use on site.
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3. The device has three working modes, which are convenient for users to flexibly choose according to the on-site situation and improve the testing speed. The working modes are: fully automatic mode, manual mode, and automatic tuning manual boost mode.
4. It can store and print data in different locations, and the stored data numbers are numerical, making it convenient for users to identify and search.5. When the device automatically scans the frequency, the starting point of the frequency can be set arbitrarily within the specified range, and the LCD screen displays the scanning curve, making it convenient for users to intuitively understand whether the resonance point has been found.
6. Adopting DSP platform technology, it is convenient to add or remove functions and upgrade according to user needs, making the human-machine exchange interface more user-friendly.
workshop floorWorkshop Site
Huatian Electric Power has a self owned factory area of 4500 square meters and a total of more than 100 employees. The series resonant device is widely used in industries such as power, metallurgy, petroleum, and chemical engineering. It is suitable for the handover and preventive testing of large capacity, high-voltage capacitive samples such as power cables, power transformers, hydroelectric generators, GIS, etc.
Engineering Case
Engineering Case
As an old manufacturer of series resonance production, Huatian Power has a profound research and development technology foundation and a complete after-sales service system. Currently, it has provided series resonance related after-sales services to more than a thousand customers.
Guangdong Meiyan Jixiang Hydropower Station
In early September, Huatian Power received an invitation for after-sales service from a customer. Our after-sales engineer, Mr. Zhang, immediately went to the customer's location to provide technical support for the HTXZ series resonant withstand voltage device and other equipment purchased from our company.
After sales service of Guangdong Meiyan Jixiang Hydropower Station
Shandong Heze customer
In early September, at the invitation of the customer, Mr. Wang, an after-sales engineer from Huatian Electric Power, went to Heze City, Shandong Province to provide technical support for the HTXZ-2000kVA/500kV large series resonant withstand voltage test device purchased by the customer from our company.
Shandong Heze customer after-sales service
Wenzhou Longwan Power Supply Company
Our company has arranged after-sales colleagues to provide after-sales service for Wenzhou Longwan Power Supply Company, training equipment: HTXZ-405kVA/108kV variable frequency series resonant AC withstand voltage test device.
Wenzhou Longwan Power Supply Company After sales Service
Heilongjiang Jingrui Construction Engineering Co., Ltd
In November, our company received an after-sales invitation from Heilongjiang Jingrui Construction Engineering Co., Ltd. and immediately arranged for after-sales personnel to go to Lijiang City, Yunnan Province, where the customer is located, to provide training on the HTXZ cable AC withstand voltage series resonant device they purchased.
After sales service of Heilongjiang Construction Engineering Co., Ltd
Wisdom Automatic Equipment Wuxi Co., Ltd
In early November, upon receiving a training invitation from Wistron Automatic Equipment Wuxi Co., Ltd., our after-sales colleagues immediately went to Huai'an City to provide training on the instruments purchased by customers.
After sales service of Wisdom Automatic Equipment Co., Ltd
China Railway Construction Heavy Industry Group Co., LtdOur company has received an invitation from China Railway Construction Heavy Industry Group Co., Ltd. and arranged for after-sales colleagues to arrive at the site to provide instrument training. The main training instrument is the HTXZ-108kVA/108kV variable frequency series resonant AC withstand voltage test device.
After sales service of China Railway Construction Heavy Industry Group Co., Ltd
answer questions and resolve doubtsDispel Doubts
Huatian Electric Power is a high-tech company established in 2004 through the restructuring of the original Wuhan High Voltage Research Institute Third Industry. Its predecessor, Wuhan High Voltage Research Institute High Test Equipment Manufacturing Factory, was founded in 1992 and was one of the early manufacturers in China engaged in high voltage testing. With years of experience in the research and development of series resonance technology, we have sold over a thousand sets of series resonance devices.Q
During long-term testing, the high voltage of resonance will gradually increase slowly, but the low voltage remains unchanged?A
After reaching the test voltage, both the low and high voltage of resonance will stop boosting and remain at the current voltage. However, due to the fact that the tested objects of resonance are mostly those with large capacitance, there will be a capacitance rise phenomenon during withstand voltage, especially for a long time. Therefore, the high voltage will gradually and slowly rise.Q
Resonance occurs during the voltage boosting process. When the voltage reaches a certain level, the high voltage no longer rises, but the low voltage continues to rise normally. The voltage waveform on the instrument interface fluctuates up and down?A
Resonant boost indicates that there is no problem with the matching between the resonance and the test sample, and the voltage has not continued to rise, indicating that the test voltage has not been reached. Therefore, there is no overvoltage protection, and the low voltage is boosting normally. The output power of the resonance is also normal. If there is no occurrence of disharmony or breakdown, it indicates that the ground insulation of the test sample is normal. After ruling out the above faults, combined with the waveform of voltage fluctuations, it indicates that discharge occurred during the test, which may exist in the resonant equipment or the test sample.Q
Resonant high voltage cannot be raised to the test voltage, but the theories of reactors and excitation transformers can be satisfied?A
The high voltage of resonance is indeed related to the selection of output voltage for the combined excitation of the reactor, but it is also related to the power factor and quality factor Q of the entire resonant circuit composed of the reactor and the test object. If the quality factor Q of the entire system is low, then most of the system is reactive power, and the active power is too small, so the high voltage cannot be raised very high. And the quality factor Q is related to the frequency f of resonance, so in the above situation, we need to further adjust the reactor combination to change the frequency.Q
Some resonators have compensating capacitors, while others do not have compensating capacitors in their resonant devices?
- AThe resonant device is a boost device based on the principle of series resonance, which has a certain relationship with the L and C of the entire circuit. Here, L is the reactor of the resonant device, and C is generally the capacitance of the tested object or the capacitive voltage divider. This indicates that resonant devices generally do not require compensating capacitors. The test objects for resonance are cables, transformers, switches, busbars, etc., and the voltage level we commonly use increases from 10-220kV to higher. With so many specifications of test samples, there may be a problem where the reactor cannot match resonance for some of the test samples. This cannot be solved by changing the inductance L and frequency f. We can only change the capacitance C, so we need to compensate for the capacitance. There is another situation where we need to further satisfy the resonance frequency at the power frequency or near power frequency, and we also need to adjust the frequency through capacitor C, which also requires compensation for the capacitor.
- Practical knowledge of series resonance technologyThe reason why the variable frequency series resonant withstand voltage test device cannot boost the voltage
- 2020/11/3Principle of complete set of equipment for power frequency AC withstand voltage test
- 2020/11/2Attention to AC voltage withstand test of variable frequency series resonant voltage withstand device
- 2020/11/1Application of Series Resonance in Cable Testing
- 2020/10/31The role of Q value in frequency conversion series resonance withstand voltage test device
- 2020/10/30The advantages of series resonance in power systems
- 2020/10/29Series resonant capacitors
- 2020/10/28The main differences and practical applications between frequency conversion resonance and power frequency resonance
- 2020/10/27Application of Series Resonance and Parallel Resonance Circuits
2020/10/26
Passive components in series resonant circuits2020/10/25
More detailsproduct video
Product Video
Product Atlas
Product Picture
Product Attachment Diagram
complete set
Incentive Transformer
Variable Frequency Power Supply
reactor
Compensation capacitor
voltage divider
Voltage divider signal line
power cord
Reactor series parallel line
Reactor series parallel line
Variable frequency source output line
High voltage output line
Incentive variable output line
ground wire
Specialized testing line crocodile clip
Specialized testing line pliers
printing paper
USB drive
Instruction manual, inspection certificate, certificate of conformity
Product detail images
Incentive Transformer
Incentive Transformer Panel
Excitation transformer input
Excitation transformer terminal
Variable Frequency Power Supply
Variable frequency power supply display screen
Variable frequency power input
Variable frequency power supply grounding
Variable frequency power printer
Variable frequency power supply USB interface
Variable frequency power switch
Voltage divider base
Production process diagram
On site production drawing
On site production drawingOn site production drawing
On site production drawing
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