No.

Codes

Fault Type

1

5000

B: Partial discharges of low energy density or hydrolysis

2

5001

E: Partial discharges of increasing energy density

3

5010

D: Coincidental partial discharges and conductor overheating

4

5100

C: Partial discharges of high energy density, possibly with tracking

5

0000

A: No fault: normal deterioration

6

0001

N: Thermal fault of temperature range 100˚C - 200˚C

7

0010

I: Insulated conductor overheating

8

0011

J: Complex thermal hotspot and conductor overheating

9

0100

F: Low energy discharge: flashover without power follow through

10

0101

K: Coincidental thermal hotspot and low energy discharge

11

0110

G: Low energy discharge: continuous sparking to floating potential

12

0120

H: High energy discharge: arc with power follow through

13

0200

F: Low energy discharge: flashover without power follow through

14

0210

G: Low energy discharge: continuous sparking to floating potential

15

0220

H: High energy discharge: arc with power follow through

16

1000

M: Thermal fault of low temperature range < 150˚C

17

1001

N: Thermal fault of temperature range 100˚C - 200˚C

18

1010

O: Thermal fault of temperature range temperature range 150˚C - 300˚C overheating of copper due to eddy currents

19

1020

P: Thermal fault of high temperature range 300˚C - 700˚C: bad contacts/joints: core and tank circulating currents

20

1100

K: Coincidental thermal hotspot and low energy discharge

21

2001

N: Thermal fault of temperature range 100˚C - 200˚C

22

2020

P: Thermal fault of high temperature range 300˚C - 700˚C: bad contacts/ joints: core and tank circulating currents