|
Test Sequence |
|
Test Voltage
Highest Voltage for
Cable Um
[kV] |
Result |
|
|
|
7.2 |
12 |
17.5 |
24 |
36 |
|
|
A.C. Voltage
Withstand |
1 min |
27 |
35 |
45 |
55 |
75 |
no breakdown and no
flashover |
|
Partial Discharge |
|
4.5 |
7.5 |
10.9 |
15 |
22.5 |
≤ 3 pC |
|
|
|
7.2 |
12 |
17.5 |
24 |
36 |
≤ 20 pC |
|
Impulse Voltage
Withstand |
10 positive and 10
negative, 1.2/50 µs, between conductor and grounded screen |
Indoor
60
outdoor
70 |
75
95 |
95
110 |
125
150 |
170
200 |
no breakdown and no
flashover |
|
Load Cycling |
63 cycles 5h
heating, 3h cooling Conductor temperature:
PE, PVC cables: 75°C XPE cables: 95°C |
9 |
15 |
22 |
30 |
45 |
no breakdown and no
flashover |
|
Partial Discharge |
|
4.5 |
7.5 |
10.9 |
15 |
22.5 |
≤ 3 pC |
|
|
|
7.2 |
12 |
17.5 |
24 |
36 |
≤ 20 pC |
|
Thermal Short
Circuit |
1 s symmetrical
fault with conductor temperature as for cable specification
1 s earth fault with
armour temperature as for cable specification |
|
|
|
|
|
no visible signs of
damage |
|
Load Cycling |
repeat |
9 |
15 |
22 |
30 |
45 |
no breakdown and no
flashover |
|
Partial Discharge |
|
4.5 |
7.5 |
10.9 |
15 |
22.5 |
≤ 3 pC |
|
|
|
7.2 |
12 |
17.5 |
24 |
36 |
≤ 20 pC |
|
A.C.Voltage
Withstand |
4h |
14 |
24 |
36 |
48 |
72 |
no breakdown and no
flashover |
|
Impulse Voltage
Withstand |
repeat |
70 |
95 |
110 |
150 |
200 |
no breakdown and no
flashover |
|
D.C. Voltage
Withstand |
30 min |
28 |
48 |
72 |
96 |
144 |
no breakdown and no
flashover |
|
Humidity indoor
terminations |
conductivity
800 µS/cm, 100h spray rate: 0.4 l/m3/h |
4.5 |
7.5 |
10.9 |
15 |
22.5 |
no breakdown and no
flashover
no visible tracking
and no erosion |
|
Salt-fog outdoor
terminations |
224 kg/m3 |
4.5 |
7.5 |
10.9 |
15 |
22.5 |
no flashover |
|
Notes: |
|
Um
is the highest phase to phase voltage. All other voltages are stated
as phase to ground values. |
|
