Case

Characteristic Fault

C₂H₂/C₂H₄

CH₄/H₂

C₂H₄/C₂H₆

PD

Partial Discharges

NS1

<0.1

<0.2

D1

Discharge of Low Energy

>1

0.1 - 0.5

>1

D2

Discharge of High Energy

0.6 - 2.5

0.1 - 1

>2

T1

Thermal Fault t < 300˚C

NS1

>1 but NS1

<1

T2

Thermal Fault 300˚C < t < 700˚C

<0.1

>1

1 - 4

T3

Thermal Fault t > 700˚C

<0.22

>1

<4