Case

R₂

C₂H₂/C₂H₄

R1

CH₄/H₂

R5

C₂H₄/C₂H₆

Suggested Fault Diagnosis

0

<0.1

>0.1 to <1

<1

Unit normal

1

<0.1

<0.1

<1

Low-energy density arcing-PD

2

0.1 to 3

0.1 to 1

>3

Arcing?High-energy discharge

3

<0.1

>0.1 to <1

1 to 3

Low temperature thermal

4

<0.1

>1

1 to 3

Thermal less than 700˚C

5

<0.1

>1

>3

Thermal exceeding 700˚C