• XT/PDD-1A Digital  Partial Discharge Detector System 1
XT/PDD-1A Digital  Partial Discharge Detector

XT/PDD-1A Digital Partial Discharge Detector

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XT/PDD-1A Digital Partial  Discharge Detector



IApplication

The series product is a newgeneration of comprehensive testing, analysis, monitoring product for transformerpartial discharge with performance of super anti-interference and mainly appliedto partial discharge detection and on-line monitoring for large powertransformers and other HV electric equipments with a variety of voltage classand capacity.

II.  Product Features

XT/PDD-1A seriesdigital partial discharge detector combines technologies of computer, analogelectronic, high-speed signal acquisition, digital signal processing andgraphics display, ultrasonic testing and various anti-interference and networkcommunication.

1. Partial discharge detection

Introduce signals simultaneously from 5 test points (4 ultrasonic channelsand 1 high-frequency current channel) from transformer, and analyze partialdischarge for transformers or HV electric equipments by electrical method andradio-acoustic method;

Measurement, statistics and analysis of partial discharge repetitiondischarge number;

Analysis for single discharge pulse waveform and determine dischargenature;

Gain range: adjust each channel individually, smooth adjust waveformdisplay at any time and not affect measurement results;

Random interference which is not synchronized with power supply can beremoved effectively by anti-disturbance function of relative filteringtechnology;

Band-pass filter adopts technology of analog and digital mixed-filtering, broadbandcan be combined random, which can restrain various kinds of interferenceefficiently.

Function of partial discharge intelligent recognition can automaticallyidentify interference signals and partial discharge signals at specificcondition, and remove interference.

2. On-line monitoring for partial discharge

The on-line monitoring for partial discharge makes the partial dischargemeasuring technology as the core, utilizes integrated testing method ofelectrical pulse and ultrasonic to record and analyze monitoring data in aperiod, and then get figure of discharge change trend. The system shall sendalarm signal when the monitoring data is more than early warning value. Hiddendangers of partial discharge for transformer and other HV electric equipmentscan be found in time by on-line monitoring for partial discharge, so the earlyforecasting fault can be reached in order to avoid malignant accidents.

Adopting broadband current transformer collects discharge signals of HVelectric equipment through neutral ground circuit or core ground circuit andoil tank ground circuit. Adopting many kinds of anti-interference methods torestrain all kinds of outer noise interference and improve signal to noiseratio, thus, the detection accuracy is increased efficiently.

Multi-channel data collection is adopted by system, which can collect anddeal with discharge signals and ultrasonic signals. The system complex utilizestechnology combination of data and simulating compound filtering, dynamicbandwidth filtering, discharge signal intelligent recognition and otheranti-interference technologies.

Inter-city datatransportation can be realized by internet, so the operating condition ofequipment can be known at any place and time, which can lead the remote on-linemonitor of HV electric equipment (such as transformer) realized.





III. Technical performanceindicator

1.     Main Processor

CPU: SAMSUNG S3C2410 ARM920T;

MEMORY: 64M SDRAM, 64M NAND Flash;

DISPLAY SCREEN: industrial grade high-brightness 3.5-inchtrue color TFT LCD touch screen, display resolution: 320*240;

External interface: LCD touch screen interface, 5-waysignal input interface, RS-232 interface, RS-485 interface.

2.     Working environment:

Environmenttemperature:  -1045    

Relativehumidity≤ 95%

3.     Measurement channels: 5 channels (4ultrasonic channels, 1 high-frequency current channel)

4.     Sensitivity detection: 10pC

5.     Sampling accuracy:  12Bit

6.     Sampling rate: 20MHz

7.     Measurement range: 10pC1000nC

8.     Full-scale non-linearerror: 8%

9.     Scale non-linearerror: 5%

10. Scale switch: ×1,×10,×100

11. Measurement frequency band: 3dBboardband 10kHz1MHz

12. Power supply: AC 220V; frequency 50Hzpower 30W

13.  Dimension:length*width*height(300×200×105mm




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It means while in Basic, you will get a list of jobs to choose from, based on your Electronic line score. The jobs offered will be those you qualify for and that have a Tech School class that starts within about two weeks of you graduating Basic. But you have to understand, in the electronics area, Tech school class's do not start every week, or even every month, some only have 4 or 5 Tech School class's each year. So you will NOT be offered every AFSC, only those with a Tech School class that starts soon after you finish Basic. So there is really no way to tell, if Biomedical Equipment Tech will be offered or not.
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Quartermaster and Chemical Equipment Repairer (63J) The Quartermaster and Chemical Equipment Repairer performs unit and direct/general support maintenance on tactical utility, precise power generation, laundry and bath equipment, pumps, engines, burners, filter units, smoke generation and water purification or associated items. The Quartermaster and Chemical Equipment Repairer is primarily responsible for supervising or performing maintenance on chemical equipment, quartermaster machinery, forced air-heaters and special purpose equipment. Some of your duties as a Quartermaster and Chemical Equipment Repairer may include: Maintaining and repairing electrical/fuel heater systems, pumps, decontamination systems, protective filter systems, smoke generator systems and quartermaster and chemical equipment electrical systems Job training for a Quartermaster and Chemical Equipment Repairer consists of nine weeks of Basic Training, where you'll learn basic Soldiering skills, and 11 weeks of Advanced Individual Training, including practice in marine engine maintenance and repair. Part of this time is spent in the classroom and part in the field. You'll learn: Internal combustion engine theory Use and care of hand and power tools Helpful attributes include: An interest in shop mechanics An interest in fixing engines and machinery An ability to use hand and power tools A preference for doing physical work Advanced level Quartermaster and Chemical Equipment Repairers supervise and train other Soldiers within the same discipline. The skills you learn as a Quartermaster and Chemical Equipment Repairer will help prepare you for a civilian career with the marine transportation, commercial fishing, oil exploration or oil drilling industries. You'll be able to consider a future as a marine engine mechanic.
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Knife (with a pointy or pointed blade and/or a blade longer than 6cm) super scissors (with blades longer than 6cm) 'Strike everywhere' fits (non-risk-free practices fits) Fireworks, flares and different pyrotechnics, inclusive of occasion poppers and toy caps Cigarette lighter (yet you are able to hold a single lighter on your individual) Darts Catapult drugs and scientific kit you are able to properly be asked to teach that any drugs or scientific kit is critical for the dimensions of your trip. you're able to try this by way of showing a duplicate of your prescription or a letter out of your physician. in basic terms soak up your hand luggage what you opt for for the trip.
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Population below poverty line: 21 % (2002)
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Absolutely.
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