|
Test Sequence |
|
Test Voltage
Highest Voltage for
Cable Um
[kV] |
Result |
|
|
|
7.2 |
12 |
17.5 |
24 |
36 |
|
|
Impact |
4 kg wedge dropped 6
times from 2 m armoured cables only |
|
|
|
|
|
no functional damage |
|
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 |
70 |
95 |
110 |
150 |
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 |
as above with cable
in 1 m water, oversheath removed |
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
|
|
Notes: |
|
Um
is the highest phase to phase voltage. All other voltages are stated
as phase to ground values. |
|
|
Ordering Intormation |
Joint kits are
available for single core and 3-core plastic insulated cables with
and without armour up to 36 kV and for all standard cross-sections.
A full selection
table is available on request.
|
|
