Yjv, Yjy, Yjlv, Yjly High Voltage XLPE Cable

Product Name:

Model NO.:

YJV, YJY, YJLV, YJLY

Application:

Indoors,Tunnel,Channel and Underground

Insulation Material:

XLPE

Jacket:

PVC or PE

Type:

High Voltage

Conductor Material:

Aluminium or Copper

Trademark:

Jinshui

Transport Package:

Wooden Drum, Iron Wooden Drum, Iron Drum

Origin:

Henan, China (Mainland)

Product Description

1. Rated Voltage of Power Cable

Uo is the AC rated voltage(effective value)of metal screen,metal armor and metal sheath of conductor used in power cable design.The insulation structure design of cable and electric test all adopt Uo as the standard.It reflects the insulation level of power cable.

U is the AC rated voltage(effective value)of phase conductor in power cable design.It is not only related to insulation level of power cable,but also to system earthing style and power cable category in using power cable.

Um is the maximum value of the highest system voltageto be borne by equipment.

2. Category of Power Cable

According to the sustained time of earthing breakdown,power cable is divided into two categories:

Category 1:The sustained time of earthing breakdown does not exceed 1 minute,that is,it requires a system when any phase conductor contacts the earth or earthing conductor,can separate the phase conductor from the system in 1 minute.

Category 11:The sustained time of each earthing breakdown usually should not exceed 1 hour,the longest not exceeding 8 hours and the accumulated time in a year should not exceed 125 hours.

For the insulation level of two categories of cable,see the following table.

Table 1 Category and Rated Voltage of Power Cable

U	Um	Uo	KV
kV	kV	Category 1	Category 11
6	7.2	3.6	6
10	12	6	8.7
15	18	8.7	12
20	26	12	18
35	42	21	26
110		64

Table 2 Thickness and Requirements of Insulation Layer of 6-110kV XLPE Insulation Power Cable

Rated Voltage Conducting kV Wire Core			6/6, 6/10		8.7/10, 8.7/15		12/20		18/20 18/30		21/35		26/35		64/110
Cross Section Area mm2	No./Wire Dia. mm	Extruded Overall Dia. Mm	Av. Thickness ≥	Thinnest Thickness ≥	Av. Thickness ≥	Thinnest Thickness ≥	Av. Thickness ≥	Thinnest Thickness ≥	Av. Thickness ≥	Thinnest Thickness ≥	Av. Thickness ≥	Thinnest Thickness ≥	Av. Thickness ≥	Thinnest Thickness ≥	Av. Thickness ≥	Thinnest Thickness ≥	Core Shift Degree ≤
25	7/2.25	6.0	3.4 2.96 4.5 3.95 5.5 4.85 8.0 7.0 9.3 8.27 10.5 9.35
35	7/2.62	7.0
50	7/3.10	8.3
70	19/2.25	10.0
95	19/2.62	11.6
120	19/3.0	13.0
150	36/2.36	14.6
185	36/2.62	16.2
240	36/3.00	18.4													19.0	17.10	0.10
300	36/3.36	20.6													18.5	16.55
400	60/3.00	23.8													17.5	15.75
500	60/3.36	26.6													17.0	15.30
630	60/3.75	30.0													16.5	14.85
800	60/4.26	34.0													16.0	14.40
1000	60/4.75	38.2													16.0	14.40
1200	60/5.2	42.0													16.0	14.40