Multi Gas DGA Monitor

DGA Method: Laboratory Grade Gas Chromatography

Accuracy¹

Repeatability²

Range³

Hydrogen (H2 )

±5% or ±3 ppm

<2%

3-3,000 ppm

Oxygen (O2)

±5% or +30/-0 ppm

<1%

30-25,000 ppm

Methane (CH4 )

±5% or ±5 ppm

<1%

5-7,000 ppm

Carbon Monoxide (CO)

±5% or ±5 ppm

<2%

5-10,000 ppm

Carbon Dioxide (CO2 )

±5% or ±5 ppm

<1%

5-30,000 ppm

Ethylene (C2 H4 )

±5% or ±3 ppm

<1%

3-5,000 ppm

Ethane (C2 H6 )

±5% or ±5 ppm

<1%

5-5,000 ppm

Acetylene (C2 H2 )

±5% or ±1 ppm

<2%

1-3,000 ppm

Nitrogen (N2 )

±10% or ±5,000 ppm

<20%

5,000-100,000 ppm

All specifications are independent of oil temperature and gas pressure levels

1) Percent or PPM - whichever is greater

2) At the calibration leve

3) Gas-in-Oil

Additional Monitoring Options

Accuracy4

Range

Moisture-in-Oil

±2%

0-100% RS

< 10% of reading for oil temperature

> 30°C

0 to 80⁵ ppm

< 18% of reading for oil temperature

< 30°C

0 to 80⁵ ppm

Oil Temperature

0.1°C (typically)

-40°C to +180°C

4) Includes non-linearity and repeatability

5) Upper range limited to saturation

Total Dissolved Gases

True Total Combustible Gas

True Total Dissolved Combustible Gas (TDCG) output is available reporting 100% of detected level in PPM for H2 , C2 H2 , C2 H4 , CO, CH4 , C2 H6

Total Hydrocarbons

Total Hydrocarbons (THC) output is available reporting 100% of detected level in PPM for CH4 , C2 H2 , C2 H4 , C2 H6

Gas Analysis Parameters

Gas Analysis Parameters

Oil sampling is continuous and gas analysis intervals are user-selectable from 2 hours to 12 hours (Default: 4 hours). Automatic schedule acceleration when rate of change alarm limit is exceeded (Default: 1 hr)

Data Management

All data is date and time stamped and up to two years of data is stored in memory

Automated Calibration Verification

System performs periodic automated calibration verification to National Institute of Standards and Technology (NIST) traceable gas standard

Alarms

Two individually programmable relays

50 VDC or 240 VAC @ 3 A max. (125 VDC @ 1 A max.); relay contacts operate as normally open or normally closed

Supported Alarms

Gas Caution & Alarm for Level (ppm), Rate-of-Change (ppm/day), Power and/or Service Event

External Sensor Inputs

Analog Inputs

Three (3) analog 4 to 20 mA inputs, ambient temperature sensor included. Optional sensors include transformer load guide and moisture[1]in-oil with temperature probe (uses 2 inputs)

Communications

Standard Interfaces

RS-232, RS-485, Ethernet Fiber (100Base-FX), V.92 Internal POTS modem

Optional Interfaces

Cellular modem, Ethernet Copper (10/100Base-TX), Wireless Radio

Supported Protocols

TCP/IP, DNP3, Modbus RTU, ASCII, OPC and IEC 61850

Environmental Specifications

Operating Temperature

-50°C to +55°C

Cold Start Temperature

-20°C

Operating Humidity

5% to 95% RH, non-condensing

Oil Inlet Pressure

0 to 45 psi (0 to 3 bar)

Storage Temperature

-40°C to +75°C

Storage Humidity

5% to 95% RH, non-condensing

Physical Specifications

Product Dimensions

HxWxD: 22.0 in x 20 in x 11.2 in (55.9 cm x 50.8 cm x 28.4 cm)

Packaging Dimensions

26.4 in x 26.4 in x 15.9 in (67 cm x 67 cm x 40.3 cm)

Product Weight

65 lb (29.5 kg)

Shipping Weight

70 lb (31.8 kg) (monitor package only)

Enclosure Rating

NEMA 4X, IP66

Input Power Requirements

Voltage

115 VAC or 230 VAC ±15%

Frequency

50/60 Hz

Current

6 A maximum @ 115 V; 3 A maximum @ 230 V

Radiated and Conducted Emissions

Specification

Test Method

Radiated Emissions

EN 61326-1: 2006

CISPR 11: 2009 A1: 2010 Class A

Conducted Emissions

EN 61326-1: 2006

CISPR 11: 2009 A1: 2010 Class A

Current Harmonics

EN 61000-3-2: 2006

EN 61000-3-2: 2006 A1: 2009 Class A

Voltage Fluctuations

EN 61000-3-3: 2008

EN 61000-3-3: 2008 Class A

Radiated and Conducted Immunity

Specification

Test Method

ESD

EN 61326-1: 2006

IEC61000-4-2: 2009

Radiated Immunity

EN 61326-1: 2006

IEC61000-4-3: 2006 A2: 2010

EFT

EN 61326-1: 2006

IEC61000-4-4: 2004 A1: 2010

Surge

EN 61326-1: 2006

IEC61000-4-5: 2006

Conducted RF Immunity

EN 61326-1: 2006

IEC61000-4-6: 2009

Magnetic Field Immunity

EN 61326-1: 2006

IEC61000-4-8: 2010

Voltage Dips & Interrupts

EN 61326-1: 2006

IEC61000-4-11: 2004

Safety

Specification

IEC 61010-1

IEC 61010-2-81

UL 61010-1 (2nd Edition)

CSA-C22.2 No. 61010-1-04