Series resonance test device

NegotiableUpdate on 05/06

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

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Overview

The series resonance test device is a specialized electrical equipment that uses the principle of series resonance to conduct AC withstand voltage tests. It consists of a variable frequency power supply, an excitation transformer, a high-voltage reactor, and a capacitive voltage divider. By adjusting the power supply frequency to make the inductive reactance in the circuit equal to the capacitive reactance, it generates a high voltage on the test sample that is tens of times higher than the power supply voltage.

Product Details

The series resonance test device is a key equipment for conducting AC withstand voltage tests on high-voltage electrical equipment in the power system. It is particularly suitable for test objects with large capacitance and high test voltage, such as long-distance power cables, GIS (gas insulated switchgear), power transformers, generators, etc.

Compared to traditional test transformers, series resonant devices have significant advantages such as smaller required power capacity, lighter equipment weight, better output waveform, and no occurrence of overvoltage. Below, we will provide a detailed introduction from the aspects of principle, composition, working process, and purpose.

Main features and advantages:

Lightweight equipment: Due to the use of resonant boost and low power requirements, the entire equipment weighs much less than traditional power frequency testing equipment, making it easy to transport on site.

High safety: Once the test sample breaks down and the resonance condition is disrupted (circuit detuning), the high voltage immediately drops and the arc instantly extinguishes, without expanding the fault point or generating overvoltage that threatens insulation.

Pure waveform: The resonant circuit itself has good filtering effect, which can filter out high-order harmonics and obtain pure sine wave voltage at both ends of the test sample.

Less destructive: Due to the relatively gentle energy exchange during the boosting process, the destructive effect on good insulation is much smaller than that of impulse voltage or non resonant power frequency tests.

Parameters of UHV series series series series resonance test device

Rated output voltage	0-1000kV and below
output frequency	30～300Hz
Resonant voltage waveform	Pure sine wave, waveform distortion rate ≤ 1.0%
working hours	Continuous working time at full power for 60 minutes
quality factor	30~90
Frequency regulation sensitivity	0.1Hz
instability	＜0.05%
working power supply	Single phase 220V or three-phase 380V ± 10%
working power supply	Power frequency 50Hz ± 5%

Product configuration (applicable scope (10kV~500kV voltage level substation electrical equipment AC withstand voltage equipment, frequency 30-300Hz)

Product model name	Variable frequency source	Resonant reactor	Incentive Transformer	voltage divider	Scope of application
UHV-50/50	4kW	Two units of 25kV/1A (dry-type)	4kVA (dry type)	50kV	1000kVA and below 10kV power transformer. 10kV switch, busbar, PT, CT, etc. 10kV (300mm2) cable ≤ 1.0km
UHV-108/108	6kW	Four units of 27kV/1A (dry-type)	6kVA (dry type)	110kV	31500kVA and below 35kV power transformers. 35kV switches, busbars, PT, CT, etc. 10kV (300mm2) cable ≤ 2km. 35kV (300mm2) cable ≤ 0.5km
UHV-200/200	10kW	50kV/1A four units (dry type)	10kVA (dry type)	200kV	50000kVA and below 110kV power transformer. 110kV GIS, PT, CT, etc. (preventive testing). 35kV (300mm2) cable ≤ 1.0km. 10kV (300mm2) cable ≤ 2.0km
UHV-270/270	15kW	Six units of 45kV/1A (dry-type)	15kVA (dry type)	300kV	50000kVA and below 110kV power transformer. 110kV GIS, PT, CT, etc. 35kV (300mm2) cable ≤ 1.2km. 10kV (300mm2) cable ≤ 3.0km
UHV-800/400	30kW	50kV/2A eight units (dry type); 100kV/2A four units (oil immersed)	30kVA (dry type); 30kVA (oil immersed)	400kV	80000kVA and below 220kV power transformers. 50000kVA and below 110kV power transformer. 110kV/220kV GIS, PT, CT, etc. 35kV (300mm2) cable ≤ 2.0km. 110kV (300mm2) cable ≤ 0.7km
UHV-1600/800	60kW	200kV/2A four units (oil immersed)	60kVA (dry type)	800kV	80000kVA and below 220kV power transformers. 50000kVA and below 110kV power transformer. 500kV GIS, PT, CT, etc. 220kV switches, GIS, PT, CT, etc. 110kV (400mm2) cable ≤ 1.5km. 220kV (400mm2) cable ≤ 1.0km

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. For more information on ultra-high voltage products, please enter the product center.

Product features

1. Reactors of the same voltage level and capacity have smaller volume and lighter weight; Low temperature rise at rated load; Adopting dry casting, it has high mechanical strength, good electrical insulation performance, and is aesthetically pleasing and reliable.

2. The variable frequency power supply control box has a large capacity margin; Strong protection function; Good output waveform; Good stability; Having multiple working modes and easy operation; Single phase 220V or three-phase 380V input power supply is universal, convenient for on-site power supply.

3. Flexible configuration. Different types of reactors can be selected to meet the requirements of different test samples, achieving multi use and high cost-effectiveness.

4. The operation interface supports language switching function and can freely switch between multiple languages simultaneously. The default is to switch between Chinese and English, and other languages can be customized.

5. The system has a built-in series resonance parameter calculator, which can quickly calculate the inductance, capacitance, frequency, resonant high voltage current, and cable capacitance of series resonance with one click.

UHV系列变频串联谐振交流耐压试验装置