Forewarned is Forearmed… Online Dissolved Gas Analyzer

Analysis of the gases dissolved in power transformer oil is recognized as the most useful tool for early detection and diagnosis of incipient faults in transformers. In addition, water contamination deteriorates the performance of the oil as high moisture content increases the risk of corrosion and overheating. This is in particular when the water content reaches the saturation point of the oil and free water is formed.

Besides regular gas chromatographic analysis and off-line moisture analysis of the insulation oil of power transformers, online monitoring systems gain more and more importance worldwide.

REG-DGA HC 01+ - Composite Gas & Moisture-in-oil measurement

REG-DGA HC 03 - Individual measurement of Hydrogen (H2), Carbon Monoxide ( CO) & Moisture (H2O) Ea

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REG-DGA HC 05 - Individual measurement of Hydrogen (H2), Carbon Monoxide ( CO), Ethylene (C2H4), Acetylene ( C2H2) & Moisture (H2O)

REG-DGA HC 08 - Individual measurement of Hydrogen (H2), Carbon Monoxide ( CO), Ethylene (C2H4), Acetylene ( C2H2), Methane ( CH4), Ethane ( C2H6), Carbon Dioxide (CO2)& Moisture (H2O)

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REG - DGA

REG-DGA HC 01+

The REG-DGA HC 01+ is a permanently-installed composite gas-in-oil sensor

for the analysis of following dissolved key fault gases (TDCG = Total Dissolved

Combustible Gases):

Fault gas TDCG contribution

Hydrogen (H2) approx. 20 %

Carbon Monoxide (CO) approx. 30 %

Methane (CH4) < 5 %

Acetylene (C2H2) 100 %

Ethylene (C2H4) approx. 32 %

Ethane (C2H6) < 5 %

The integration of 6 relevant key gases into a total weighted gas

concentration and the measurement of Moisture in oil enables the HC 01+ to

react to most transformer faults and makes the device to a compact and cost

effective tool used in particular for early transformer fault detection and

preventative maintenance.

The HC 01+ is equipped with 2 analog 0/4 ... 20 mA outputs for the dissolved

composite gas-in-oil and moisture in oil analysis results and 4 digital relay

outputs (Hi-alarm, Hi-Hi-alarm, Moisture-alarm and system function alarm)

Key Advantages:

Composite measurement of Hydrogen (H2), Carbon Monoxide (CO), Methane (CH4), Acetylene (C2H2), Ethylene (C2H4) and Ethane (C2H6) & dissolved Moisture (H2O) in the transformer oil.

Relay outputs with light indicators showing potential alerts

Easy and fast installation without any operational interruption of the transformer

Compact and resistant design for long lasting usage

Communication interfaces ETHERNET 10/100Mbit/s (copperwired or fibre-optical) and CAN bus to support proprietary communication protocols and to be prepared for sub-station communication protocol MODBUS on TCP.

REG-DGA HC 03

The REG-DGA HC 03 is a preventive maintenance device that is permanently

mounted on the transformer. It measures continuously the most important

fault gases in a power transformer, Hydrogen (H2), Carbon Monoxide (CO)

and Moisture (H2O).

Additionally, it serves for recording the fault gas contents, allows alarm levels

to be set for each fault gas and moisture content and offers output interfaces

(4-20mA) individually for H2, CO and H2O content.

By online monitoring of the key fault gases like Hydrogen (H2), Carbon

Monoxide (CO) and Moisture (H2O), an additional potential of cost reductions

and safety improvements can be achieved.

Key Advantages:

Individual analysis of the dissolved gas contents hydrogen (H2) and carbon monoxide (CO)

Analysis of moisture (H2O) dissolved in transformer oil (both relative humidity in % and absolute humidity in ppm)

Simple, lightweight and easy-to-mount solution on any valve on the transformer (NPT 1½)

Installation on the operational transformer without any supply interruption

Sophisticated graphical-oriented software (on the device and via PC)

Various communication interfaces (RS 232, RS 485, MODBUS, integrated GSM- and analog modem)

Maintenance-free system

REG-DGA HC 05

The REG-DGA HC 05 is a permanently-installed multi-gas-in-oil analysis

system with transformer monitoring functions. It allows for the individual

measurement of moisture and the key gases namely Hydrogen (H2),

Carbon Monoxide (CO), Acetylene (C2H2) and Ethylene (C2H4) dissolved in

transformer oil.

As hydrogen (H2) is involved in nearly every fault of the insulation system

of power transformers and carbon monoxide (CO) is a sign of an

involvement of the cellulosic / paper insulation, the presence and

increase of acetylene (C2H2) and ethylene (C2H4) further classifies the

nature of a fault as overheating, partial discharge or high energy arcing.

Key Advantages:

Individual measurement of Hydrogen (H2), Carbon Monoxide (CO), Acetylene (C2H2) and Ethylene (C2H4)

Moisture-in-oil measurement

Communication interfaces ETHERNET 10/100 Mbit/s (copper-wired or fibre-optical) and RS 485 to support proprietary communication protocols and to be open / prepared for substation communication protocols IEC 61850, MODBUS, DNP 3 etc.

Optional on-board GSM and analog modems for remote communication

REG-DGA HC 08

The REG-DGA HC 08 is a permanently-installed multi-gas-in-oil analysis

system with transformer monitoring functions. It allows for the individual

measure-ment of moisture and the key gases namely Hydrogen (H2),

Carbon Monoxide (CO), Carbon Dioxide (CO2), Methane (CH4), Acetylene

(C2H2), Ethylene (C2H4) and Ethane (C2H6) dissolved in transformer oil.

As hydrogen (H2) is involved in nearly every fault of the insulation system

of power transformers and carbon monoxide (CO) is a sign of an

involvement of the cellulosic / paper insulation, the presence and

increase of acetylene (C2H2) and ethylene (C2H4) further classifies the

nature of a fault as overheating, partial discharge or high energy arcing.

Key Advantages:

Individual measurement of Hydrogen (H2), Carbon Monoxide (CO), Carbon Dioxide (CO2), Methane (CH4), Acetylene (C2H2), Ethylene (C2H4) and Ethane (C2H6)

Moisture-in-oil measurement

Communication interfaces ETHERNET 10/100 Mbit/s (both copper-wired/fibre-optical) and RS 485 to support proprietary communication protocols and to be open / prepared for substation communication protocols IEC 61850, MODBUS, DNP 3 etc.

Optional on-board GSM and analog modems for remote communication

PRODUCT REG-DGA HC 01+ REG-DGA HC 03 REG-DGA HC 05 REG-DGA HC 08

Dimensional Comparison (Approx. mm)

W 224 x H 195 x D 218 W 224 x H 224 x D 307.5 W 263 x H 263 x D 327.5 W 263 x H 263 x D 327.5

Weight (Approx.)

4 KG 7.5 KG 13.5 KG 15 KG

Gas-in-Oil Analysis

H2

CO

C2H2

C2H4

CH4

C2H6

(composite)

H2 (0 ppm … 2,000 ppm)

CO (0 ppm … 2,000 ppm)

(individual)

H2 (1 … 2,000 ppm)

CO (5 … 5000 ppm)

C2H2 (0.5 … 2,000 ppm)

C2H4 (0.5 … 2,000 ppm)

(individual)

H2 (1 … 2,000 ppm)

CO (5 … 5,000 ppm)

CO2 (25 … 5,000 ppm)

C2H2 (0.5 … 2,000 ppm)

C2H4 (0.5 … 2,000 ppm)

C2H6 (0.5 … 2,000 ppm)

CH4 (1 … 2,000 ppm)

(individual)

Oil Moisture (relative %, absolute ppm)

( 0 ppm ... 100 ppm) ( 0 ppm ... 100 ppm) (0 ppm … 100 ppm) (0 ppm ... 100 ppm)

Measurement Interval 20 min 20 min 20 min 40 min

Power Supply

120 V -20% +15% AC 50/60 Hz or 230 V -20% +15% AC 50/60 Hz or 120 V -20% +15% DC or 230 V -20% +15% DC

88 V … 276 V AC Optional: 88 V … 350 V DC

88 V … 276 V AC Optional: 88 V … 350 V DC

88 V … 276 V AC Optional: 88 V … 350 V DC

Operating Temperature:

Oil Temperature

Ambient Temperature

-20° C ... +105° C

-50° C ... +55° C

-20° C ... +105° C

-50° C ... +55° C

-20° C ... +105° C

-50° C ... +55° C

-20° C ... +105° C

-50° C ... +55° C

Oil Pressure 0 - 800 kpa 0 - 800 kpa 0 - 800 kpa 0 - 800 kpa

Power Consumption 250 VA max. 350 VA max. 350 VA max. 350 VA max.

Analog Outputs (4 - 20 mA)

2 (Standard) 4 (Standard) 5 (Standard) 8 (Standard)

Relay Outputs (220 V AC/DC, 2A, 60W)

4 (Standard) 4 (Standard) 5 (Standard) 8 (Standard)

Opto-coupler Outputs - 8 (Standard) 5 (Optional) 5 (Optional)

Analog Inputs - 8 (Standard) 10 (Optional) 10 (Optional)

Communication / Protocol Ethernet (Copper Wired / FO) for TCP (Proprietory Communication or MODBUS)

RS232 RS485 (Proprietory or MODBUS) Internal on-board modem

Ethernet (Copper Wired / FO) RS485 (Proprietory or MODBUS) On-board GSM / Analog Modem (Optional)

Ethernet (Copper Wired / FO) RS485 (Proprietory or MODBUS) On-board GSM / Analog Modem (Optional)

Your sales partner

For further details contact A. Eberle Asia & Middle East Phone 0091 22 41514023 Fax 0091 22 41514031 E-mail support-asia@a-eberle.de

Head Office A. Eberle Frankenstrasse 160 D-90461, Nuernberg Germany www.a-eberle.de Su

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