Corrosive Sulphur IEC

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    The NOVA GradesPresentation

    Dipl.Ing.Gerfrid NeweselyGmunden, 27.Feb.2007

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    Properties

    Class IA Class IIA Class IIIA

    Kinematic viscosity, mm2/s at 40C < 16,5 < 11,0 < 3,5

    at -15C < 800 -- --

    at -30C -- < 1.800 --

    at -40C -- -- < 150Flash point, C > 140 > 130 > 95

    Pour point, C < -30 < -45 < -60

    Appearance

    Density, kg/dm3 at 20C

    Interfacial tension, N/m at 25CNeutralisation number, mg KOH/g

    Corrosive sulphur

    Water content, mg/kg

    Anti-oxidant additives

    Oxidation stability

    Breakdown voltage:as delivered, kV

    after treatment, kV

    Dissipation factor, at 90C and 40 to 60 Hz

    see note

    < 0,895

    Non - corrosive

    30 / 40; see note

    0; 0,3; see note

    Limits

    clear, free from sediment and suspend matter

    < 0,895

    > 40; see note

    > 30

    > 50

    < 0,005

    IEC 60296 Ed.2/1982

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    Revision Requirements

    Viscosity classification, Pour point etc.

    Acidity test

    Corrosive sulfur test

    Oxidation stability criterions

    New requirements

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    Properties

    Transformer Oil Low Temp. Switchgear Oil

    Kinematic viscosity, mm2/s at 40C max. 12 max. 3,5

    (LCSET) at -30C max. 1.800 --

    at -40C -- max. 400

    Pour point, C max. -40 max. -60

    Water content, mg/kg

    Breakdown voltage, kV

    Dissipation factor, a t 90C and 40 to 60 HzAppearance

    Acidity, mg KOH/g

    Interfacial tension, mN/m at 25C

    Total sulphur

    Corrosive sulphur

    Anti-oxidant additives, %

    2-Furfural content, mg/kgOxidation stability

    Total acidity, mg KOH/g

    Sludge, %

    DDF / 90C

    Test duration, h

    Gassing

    Flash point, C min. 135 min. 100

    Density, g/ml at 20C

    PCA

    PCB

    No general requirement

    max. 3% DMSO Extract

    Not detectable

    Limits

    clear, free from sediment and suspend matter

    max. 0,895

    min. 40; see note

    max. 0,005

    min. 30 / min. 70

    max. 1,2

    max. 0,8

    max. 0,500

    164 (U) / 332 (T) / 500 (I) ; see note

    max. 0,1

    max. 0,01

    Non corrosive

    max. 30 / max. 40

    0 (U) / 0 - 0,08 (T) / 0,08 - 0,4 (I) ; see note

    No general requirement

    IEC 60296 Ed.3/2003

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    IEC 60296 Ed.3/2003

    LCSET Max. viscosity Max. pour point0 C 1800 mm 2/s -10 C

    -20C 1800 mm 2/s -30 C

    -30 C 1800 mm 2/s -40 C

    -40 C 2500 mm 2/s -50 C

    Lowest cold start energizing temperature (LCSET)

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    Neutralisation number

    Coulometric titration (IEC 296 Ed.2/1982)

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    IEC 62021-1 AcidityPotentiometric method

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    Touch control screen or PC monitor control available

    IEC 62021-1 AcidityPotentiometric method

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    Corrosive Sulphur ASTM D 1275

    250 ml Oil

    Cu Strip

    140 C

    19 hrs

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    Corrosive sulphur Test ISO/ASTM

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    Corrosive sulphurCopper strip / Silver strip

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    Corrosive sulphurDIN 51353

    100 ml Oil

    Ag strip

    100 C18 h

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    IEC 60296 Ed.2 Oxidation tests

    Test Conditions Measured Criterions

    IEC 61125 A 100C Acidity

    (IEC 74) 30 cm Cu Sludge1 l O2/h

    IEC 61125 B 120C Induction period(IEC 474) 90 cm Cu (until volatile acids

    1 l O2/h have neutralized thecaustic solution)

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    IEC 60296 Ed.2 Oxidation testsIEC 61125A (uninhibited oils)

    Test duration: 164 hours

    Oxygen, 1l/min

    30 cm Cu-wire

    25 ml oil

    Test temperature:100C

    Limits:

    Acidity: max. 0,4 ml KOH/g oil

    Sludge: max. 0,1 %

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    IEC 60296 Ed.2 Oxidation testsIEC 61125B (inhibited oils)

    Test duration: see Induction period

    Oxygen, 1l/min

    Test temperature:120C

    90 cm Cu-wire

    25 ml oil

    Caustic solution

    (corresponding to0,28 mg KOH/g oil)

    + indicator

    Limit:Induction period: min 120 hrs

    until change of colour

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    Test Condition Measured Criterions

    IEC 61125 C 120C Total acidity (soluble+volatile)

    (IEC 813) 90 cm Cu Sludge0,15 l Air /h Diel.Dissipation Factor

    IEC 60296 Ed.3 Oxidation tests

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    IEC 60296 Ed.2 Oxidation testsIEC 61125C (uninhibited and inhibited oils)

    Test duration: uninhibited: 164 hrs, inhibited 500 hrs

    Air 0,15 l/min

    Test temperature:120C

    90 cm Cu-wire

    25 ml oil

    Distilled water

    soluble acid

    sludge

    Volatile acid

    Limits:

    Total acids: max. 1,2 mgKOH/gSludge: max. 0,8 %

    DDF: max. 0,500

    DDF

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    2 options

    General specification

    (for general application)

    Specific Requirements

    (for special application)

    Limits:

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    IEC 60296 Ed.3/2003

    Compilation of limits

    General requirements Specific requirements

    standard ox. stability high ox. stabilitytotal acidity max. 1,2 mg KOH / g max. 0,3 mg KOH / g

    sludge max. 0,8 % max. 0,05 %

    DDF / 90 C max. 0,500 max. 0,050

    total sulphur --- max. 0,15 %

    to be agreed

    uninhibited oils (U) ---trace inhib. oils (T) ---

    inhibited oils (I) ---

    Oxidation stability (IEC 1125 C)

    Electrostatic tendency ECT

    Gassing (IEC 60628 A)

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    0

    0,02

    0,04

    0,06

    0,08

    0,1

    0,12

    0,14

    0,16

    0,18

    0 5 10 15 20 25 30 35 40 45 50

    Jahre

    NZ[mgKOH/g]

    BLW 12 BLW 13 BLW 14 BLW 23 BLW 28 BLW 30 BLW 35 BLW 45

    Acidity of Nynas-Technol Insulating Oilin service in transformers in the Austrian High Voltage Grid

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    0

    5

    10

    15

    20

    25

    30

    35

    40

    45

    0 5 10 15 20 25 30 35 40 45 50Jahre

    Grenzflchenspannung

    [mN/m]

    BWL 12 BWL 13 BWL 14 BWL 23 BWL 28 BWL 30 BWL 35 BWL 48

    Interfacial Tension of Nynas-Technol Insulating Oilin service in transformers in the Austrian High Voltage Grid

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    0

    5

    10

    15

    20

    25

    30

    35

    40

    45

    0 5 10 15 20 25 30 35 40 45 50

    Jahre

    tgdelta

    BLW 12 BLW 13 BLW 14 BLW 23 BLW 28 BLW 30 BLW 35 BLW 45

    Diel.Dissipation Factor of Nynas-Technol Insulating Oil

    in service in transformers in the Austrian High Voltage Grid

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    The Copper Corrosion Phenomenon

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    The Copper Corrosion Phenomenon:Damages in Brazil

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