Mitsubishi Pga 300

Portable DGADissolved Gas Analyzer

MITSUBISHI Portable Dissolved Gas Analyzer (PGA-300) is used to analyze 6 kinds

of dissolved gases in transformer oil, thereby improving prompt action of maintenance and

reducing maintenance cost.

Operation of this apparatus is easily done after setting the sample oil which is sampled

from transformer. A whole operation sequence of this apparatus is controlled by a micro-

processor. It has the advantage of being handy to carry.

* Analysis of TCG ( Total Combustible Gas ) and 6 kinds of Gases

* High Sensitivity for C2H2 that is Key Gas in Transformer Abnormality

* Quick Measurement ( 15 minutes )

* Small amount of oil sample (50 cc)

* Compact and Light (12 kg)

* Equipped with Communication Interface

MITSUBISHI TRANSFORMER MONITORING

FeaturesFeatures

SDK-M8789(1/2)

MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE: Mitsubishi Denki Building 2-2-3, Marunouchi, Chiyoda-ku, Tokyo 100-8310, Japan http://global.mitsubishielectric.com/ TRANSMISSION & DISTRIBUTION SYSTEMS CENTER: 651 Tenwa, Ako-city, Hyogo 678-0256 , JAPAN Phone +81-791-46-2144 FAX +81-791-46-2387

SpecificationsSpecifications

CONTENTSC2H2 (Acetylene) 0.5-500C2H4 (Ethylene) 10-2,000

CO (Carbon Monoxide)Performance Objective Gas and H2 (Hydrogen)

Measurement Range (ppm) CH4 (Methane)C2H6 (Ethane)

TCG 5010,000Measurement Accuracy(%) 20Measurement Time (min) 15

l Volume of measurement(ml) 50Extraction Method Oil Stirring Up and Circulating Air above Oil

Carrier Gas AirOperation Pannel LCD touch panel

General Dimmension (mm) W450D200H355Specificationsand Mass 12kg

100-120 or 200-240V AC(50/60Hz) 200VA max. Single-phase

W orking Enviroment (degree C) 0- 45 One RS232C port for printer One USB port for pesonal computer

202,000

Communication I/F

ITEMS

Power Supply

SDK-M8789(2/2)

ConfigurationConfiguration

HeaterSample oil

Sample vessel

Magnetic stirrer

Stirring magnet

AP

Column 4Sensors

AP

CPU board

Printer

FilterFlow controller

LCD touch panel

Sample loop

Personal Computer

SDK M8708-C-1-

Portable DGA (Dissolved Gas Analyzer)

Model PGA-300

TECHNICAL SHEET

PGA-300 Technical Sheet

SDK M8708-C-2-

1. Outline and IntroductionThe portable in-oil gas analyzer is a primary diagnosis equipment which is used to preventserious troubles and designed to detect internal abnormal phenomena of transformer earlyby measuring the concentration of gases CO, H2, CH4, C2H2, C2H4, C2H6 .and the totalconcentration of combustible gases (TCG).After sample oil taken from transformer is set in the oil vessel, a sequence of operations,namely extraction of dissolved gas from the oil, detection of gas, and quantitativedetermination of gas, is executed automatically. The result of measurement is obtained asanalysis data after about 15 minutes.

The PGA-300 has the following advantages.

(1) Measuring of TCG and 6 component gases

The analyzer has the gas detecting ability which is necessary for the detection anddiagnosis of incipient transformer abnormality.This analyzer equipped with a special separating column to separate component gasesand 4 kinds of sensors having different gas detection characteristics is capable ofmeasuring the total combustible gas concentration (TCG) and the concentration ofgases CO, H2, CH4, C2H2, C2H4, and C2H6 .

(2) High sensitivity of the C2H2(Acetylene)

The analyzer can detect very low concentration of C2H2(Acetylene) even though its

concentration is 0.5ppm in transformer oil. C2H2(Acetylene) is the key gas for

detection of transformer abnormality since it is the characteristic gas produced in

occurrence of partial discharge and high temperature local heating in oil immersed

transformer.

(3) Sampling oil amount is small.The quantity of oil to be taken for analysis is as small as 50 ml.

(4) Quick measurement is ensured.Since the result of measurement can be obtained about 15 minutes after start ofmeasurement, quick diagnosis is ensured.

(5) Equipped with sophisticated man-machine interface The operator-operation panel interaction system ensures easy measurement. The result of measurement is indicated on the LCD.

(6) Compact size and light for carry

The analyzer is so compact and light that it can be easily carried to the measuring site.(7) Database can be made on the personal computer by using the attached Data Management Program which performs data communication via USB serial port , data acquisition and diagnosis.


SDK M8708-C-3-

2. SpecificationsTable 2.1 shows the specifications of the PGA-300.

Table 2.1 Specifications of PGA-300

Item Description

Size W450 D200 H355 (mm)

Mass Approx. 12 kg

Power supply AC 100-120 or 200-240V (50/60Hz) 200VA single-phase

Gen

eral

Range of operatingtemperature

0C - 45C

Gas extraction method Equilibrium extraction with oil stirring and circulating air above oil

Extra

ctio

nse

ctio

n

Quantity of sample oil 50 ml

Gases to be detected(Objective gases)

Carbon monoxide (CO), hydrogen (H2), methane (CH4), acetylene (C2H2), ethylene(C2H4), ethane (C2H6) and TCG

Detectionconcentration

TCG : 50 10,000 ppm C2H2 : 0.5 500 ppm C2H4 : 10 2,000 ppm H2, CO,CH4,C2H6 : 20 2,000 ppm

Separating column Special chromatographic column

Detecting sensor 4 kinds of Semiconductor with Platinum filament sensor (Hot wire semiconductor sensor)

Measurementaccuracy

20%Within the range of C2H2,: 20 to 500 ppmWithin the range of CO, H2, CH4, C2H4, and C2H6: 20 to 1,000 ppm

Measurement time 15 minutes (for the first measurement after power is turned on, the waiting time of 30minutes is required)

Det

ectio

n se

ctio

n

Carrier gas Atmospheric Air

PWB Composition CPU,DI/O PWB x1PC A/I PWB x 1PCControl/

data processing32-bit CPU for control/data processing

MMI/F LCD touch panelPrinter (Option) :Graphic thermal printer

Communication I/F One RS-232C port for printer and one USB port for personal computerCon

trol s

ectio

n

Data acquisition 100 analysis results


SDK M8708-C-4-

3. Configuration

Fig 3.1 shows the piping diagram of Portable DGA. And Fig 3.2 shows theappearance of this apparatus.

Fig 3.2 Appearance of PGA-300

HeaterSample oil

Sample vessel

Magnetic stirrer

Stirring magnet

AP

Column 4Sensors

AP

CPU board

Printer

Fig.3.1 Block diagram

FilterFlow controller

LCD touch panel

Sample loop

Personal Computer


SDK M8708-C-5-

4. Standard Accessories and Recommended Spare partsDetails of standard accessories and spare parts, recommended spare parts, optionalparts and maintenance tools are shown in Tables 4.1, 4.2, 4.3 and 4.4 respectively.

Table4.1 Standard accessories and spare partsNo. Nomenclature Description Quantity

1 Data Management Program For Windows based Personal Computer (Personal Computer is not included.) 1 piece

2 Serial communication cable USB cable 1 piece

3 Oil trap filter For inline of tubing 1 piece

4 Inlet oil filter For gas inlet of gas extraction probe 1 piece

5 O-ring For gas extraction probe 1 piece

6 Sample oil vessel For gas extraction 1 piece

Table 4.2 Recommended spare partsNo. Nomenclature Description

1 Air filer For carrier air filer2 Oil trap filter For inline of tubing

3 Inlet oil filter For gas inlet of gas extraction probe

4 O-ring For gas extraction probe

5 Sample oil vessel For gas extraction

Table 4.3 Optional partsNo. Nomenclature Description

1 Printer Graphic thermal printer with serial communication cable

2 Printer paper For printer

Table 4.4 Recommended maintenance toolsNo. Nomenclature Description

1 Standard gas mixture

Gas cylinder contained gases mentioned bellow O2: 21% +/-10% C2H2: 50ppm +/-20% CO: 300ppm +/-20% C2H4: 300ppm +/-20% H2: 200ppm +/-20% C2H6: 300ppm +/-20% CH4: 200ppm +/-20% N2: Main component

2 Pressure regulator For cylinder of standard gas mixture Necessary for adjusting output pressure of 10kpa

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Mitsubishi Pga 300