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Wuhan Huatian Power Automation Co., Ltd

E-mail
whhuatian@163.com
Phone
Address
Building T4, Gufang, No. 41 Gaoxin 2nd Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province

Overview of HTXZ series resonant device

NegotiableUpdate on 04/10

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The device has protection functions such as overvoltage, overcurrent, zero start, and system detuning (flashover). The entire device is lightweight and easy to use on site, using DSP platform technology

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	－100^oC-50^oC
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

Non partial discharge variable frequency series resonant withstand voltage deviceXZB-H series

Power frequency series resonant boost device (CVT)
Product features
Product Characteristics
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.
2. The entire device is lightweight and easy to use on site.
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

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.
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