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Series Resonance Test Device

LHV(L) Variable Frequency Resonant Test System for 11kV/30MW Hydrogenerators

DSP-controlled resonant test system for 11kV/30MW hydrogenerators. Features 4 test modes, automatic frequency scanning, and <40kg modular design for field deployment.


  • US$1.00; Negotiated Price
  • Lead time: 90days

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Product Details

Product Tags

LHV(L) Variable Frequency Resonant Test System

For 11kV/30MW Hydrogenerator Withstand Testing

Modular Field Testing Solution

This DSP-based resonant test system revolutionizes generator testing with:

  • Ultra-portable 40kg max component weight

  • Four programmable test modes

  • Real-time frequency scanning with visual curve display

  • Complete protection suite (overvoltage/current/flashover)

Product Parameters

Technical parameters

Rated output voltage0~50kV(AC RMS)
output frequency45~65Hz
Resonance voltage waveformPure sine wave, waveform distortion rate≤1.0%
Work systemUnder full power output, normally continuous work time5min
quality factor10~40
Frequency regulation sensitivity0.1Hz,Instability<0.05%
Maximum test capacity5000kVA and below
Working power supply220V and 380V±10%,Power frequency 50Hz±5%

Serial product configuration(Scope of application(communication voltage test of voltage generator or motor at outlet voltage20kV and below, frequency: 50Hz±2Hz))

ModelControl consolereactorExcitation transformerVoltage dividerapplicable objects
UHV(L) - 50/5010kW/220V50kV/1A10kW/5kV50kV/500pFgenerator 0.07~0.13uF.10kV cable(300mm2)≤1.0km
UHV(L) - 75/5015kW/380V50kV/1.5A15kW/5kV50kV/500pFgenerator 0.13~0.2uF.10kV cable(300mm2)≤1.5km
UHV(L) - 225/5025kW/380V50kV/1.5A Two.50kV/1.5A25kW/5kV50kV/500pFgenerator 0.2~0.27uF.10kV cable(300mm2)≤2.5km
UHV(L) - 360/5030kW/380V60kV/2A Two.60kV/2A30kW/5kV50kV/500pFgenerator 0.27~0.33uF

Capacitance of the power generator system commonly used reference table


modelmanufacturerRated capacitorrated voltagekVPhase capacitorμF
Thermal generatorT2-12-2/126.30.1
TQ-25-2/26.30.19
TBC-30/306.30.2
TB2-30-2/306.30.2
TQN-50-2/5010.50.209
TB-60-2/6010.50.25
TQN-100-2/10013.80.234
WT23S-083AF3/300150.29
TB-320-2/320200.3
T264/640/600200.368
QF-30-2/306.30.1
QF-60-2/606.30.234
QF-60-2/6010.50.33
QFS-125-2Shanghai electrical machinery factory12513.80.08~0.12
QFSN-200-2Harbin electric machinery factory20015.750.19~0.21
QFQS-200-2Dongfang electric machinery factory20015.750.1928~0.21
QFS-300-2Shanghai electrical machinery factory300180.16~0.2
QFSN-300-2Shanghai electrical machinery factory300180.18~0.2
QFSN-600-2/600200.234
ATB-2GE352230.268
TBB-200-2former Soviet union20015.750.107
TBB-500-2 500200.25
TBB-320-2former Soviet union320200.31
TBB-800-2 800240.25
2-105*234Westinghouse600200.2
50WT23E-138ABB600220.253
synchronous compensatorTT-15-8/156.60.108
TT-30-6/3010.50.2

System Architecture

Core Components:

  1. DSP Control Unit - Digital Signal Processor platform

  2. Variable Frequency Power Supply (30-300Hz)

  3. Excitation Transformer - Dry-type design

  4. Tunable Reactors - Dual-configuration

  5. Capacitive Divider - 0.5% accuracy

Technical Innovations

FeatureAdvantageUser Benefit
DSP Control PlatformSoftware-upgradable functionalityFuture-proof investment
Bi-directional Frequency Scan±1Hz resolutionPrecise resonance tracking
Graphical LCD InterfaceReal-time Q curve displayIntuitive fault diagnosis
Modular Design40kg max unit weightSingle-person field deployment

Test Modes Comparison

  • Auto-Sweep Mode - Full automated frequency scan

  • Semi-Auto Mode - Manual resonance locking

  • Manual Mode - Expert parameter control

  • Diagnostic Mode - Partial discharge analysis

Key Specifications

  • Test Voltage: Up to 22kV (2× rated)

  • Frequency Range: 30-300Hz programmable

  • Accuracy: ±0.2% voltage, ±1Hz frequency

  • Protection: Adjustable OV/OC (1-120% range)

  • Data Storage: 1000 test records

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