NDXB-H Series Power-Frequency Inductive Reactance Generator AC Withstand Voltage Test Equipment-Wuhan Nanxing Electric Power Technology Co., Ltd.

Phone: 400-027-8938

Mobile: 133 9714 9829

Language
- Chinese version
- English

Home page

NDXB-H Series Power-Frequency Inductive Reactance Generator AC Withstand Voltage Test Equipment

Category:

Series Resonant Withstand Voltage Test Device

Contact phone number:

Leave a message to inquire about pricing.

NDXB-H 系列工频调感式发电机交流耐压装置

Download

Preview

Product Center

全部分类

Product Details

■Product Overview

Large-scale thermal and hydroelectric generators, owing to their substantial ground capacitance, require a very high test capacity during AC withstand voltage testing. When employing a variable-frequency resonant system for such tests, the demands on the variable-frequency power supply are extremely stringent; at present, most domestic testing facilities rely on resonant transformers to conduct these trials. , However, resonant transformers are inherently very heavy—often weighing several tons—making on-site testing quite inconvenient. In response to this challenge, our company has designed and manufactured a specialized inductance‑tuning generator‑based AC withstand voltage resonant boost system. This series of equipment employs a parallel configuration of multiple reactor sections; by adjusting the inductance of the tunable reactor and paralleling fixed reactors of varying numbers, it achieves resonance. The specific configuration is selected according to the required test capacity. , Reasonably configure fixed and adjustable reactors of different ratings. , Thereby minimizing the power supply capacity and the size and weight of the test equipment.

■ Product Features

When performing AC withstand voltage tests on generators of the same voltage level and capacity, the overall equipment weight is significantly reduced; the weight of each individual unit is only a fraction of that of conventional equipment. 1/5, Completely resolve the issue of on-site handling difficulties.

The entire system features a state-of-the-art operating principle and incorporates an advanced casting process. The complete setup adopts a dry‑type design and employs precision‑machined transmission components, significantly reducing operational noise.

Equipped with a dry-type columnar voltage regulator, it delivers excellent output waveform and superior stability. ;

The excitation transformer features dual high- and low-voltage outputs; when equipped with a rectifier silicon stack, it can also perform DC withstand voltage tests on the generator.

The inductance values of both fixed and adjustable reactors are optimally configured, ensuring favorable resonance points for test specimens with varying capacitances and eliminating any resonance dead zones.

The operating system not only enables adjustment of voltage and inductance but also provides real-time monitoring of the circuit’s power factor, high‑voltage side current, high‑voltage test voltage, low‑voltage output, and air‑gap lift; it further incorporates overcurrent and overvoltage protection.

■Product Specifications

Rated output voltage	0~60kV(AC Valid value ) and below
Output frequency	50Hz
Resonant voltage waveform	Pure sine wave, waveform distortion rate ≤ 1%
Work system	Continuous operating time at full power 1min
Quality factor	10~40
Maximum test capacity	3000kVA and below
Power supply	380V+15% , power frequency 50Hz

■Reference Table of Electrical Capacitance for Commonly Used Hydroelectric Generators in Power Systems

Category	Generator parameters
Thermal power generator	Rated capacity MW	Rated voltage kV	Phase capacitance μ F
	72.5-85	10.5	0.694
	125-150		1.8-1.9
	300	15.75	1.7-2.5
	400	18.0	2-2.5
	600		2.1-2.5

■Product Series Configuration and Application Scope

Product Model Name	Scope of Application ( Output voltage 20kV AC withstand voltage test for generators or motors at the specified voltage level and below; product model name; test frequency. :50Hz)
Product Model Name	Console	Voltage regulator	Reactor ( Dry type )	Excitation transformer ( Dry type )	Voltage divider	Scope of Application
200/25	30kW	30kVA ( Electric )	200kVA/25kV Adjustable one unit	30kVA ( Dry type )	30kV	Hydroelectric generator 0.4~1.0 mu F(10kV/40MW)
300/50	60kW	6OkVA ( Electric )	300kVA/50kV Adjustable one unit	60kVA ( Oil-immersed )	50kV	Thermal power generator 0.27~0.33 mu F (20kV/300MW)
600/50	60kW	60kVA ( Electric )	200kVA/50kV Adjustable one unit 400kVA/50kV Adjustable one unit	60kVA ( Oil-immersed )	50kV	Thermal power generator 0.113~0.45 mu F (20kV/600MW)
1200/50	120kW	120kWA ( Induction )	200kVA/50kV Secure two units 800KVA/50kV Adjustable one unit	120kVA ( Oil-immersed )	50kV	Hydroelectric generator 0.6~1.8uF(20kV/250MW)
2750/55	300kW	300kWA ( Induction )	750KVA55kV Secure two units 1250kVA/55kV Adjustable one unit	300kVA ( Oil-immersed )	60kV	Hydroelectric generator 1.6~3.3 mu F(20kV1770MW)

Note : Solutions can be customized based on the parameters of the test specimen.

Keywords:

NDXB-H Series Power-Frequency Inductive Reactance Generator AC Withstand Voltage Test Equipment

Service system

Offering inspection and reception services

We guarantee to welcome your visit at any time and provide you with every possible convenience.

Provide a reasonable quotation.

We guarantee to provide a unified, reasonable quotation for the products you request within 24 hours.

Provide professional technical support

We guarantee that a technical specialist will respond to any technical questions you may have within 24 hours.

Provide detailed information

We guarantee that, within 24 hours, the product catalogues, software CDs, and other technical materials you require will be delivered to your company by our local branch or office.