35 kV or Lower Power Cable with XLPE Insulation
The cable is used to transmit power on the power transmission and distribution line of A.C, 50Hz ,rated voltage 35 kv or lower, By comparison with power cable with PVC insulation ,it has not only excellent electric performance, mechanical performance, heat & aging resistant performance ,weather resistan performance ,chemical corrosion resistan performance ,but also simple structure,light weight ,no restriction by laying drop,and high temperature allowance for long term working (90℃）as well.
Executive standard
As section "extruded insulation power cable with rated voltage from 1kV(Um=1.2kV) to 35kV (Um=40.5kV)"stipulated in GB/T12706.1-2008~GB/T12706.3-2008 or IEC60502 according to the requirement of the customer.
Working Condition
1. Long-term working temperature by cable conductor is 90℃.
2. Max temperature of cable conductor shall be no more than 250℃ during short circuit (the longest lasting time shall be no more than 5 seconds).
3. Environment temperature for installation is no less than 0℃.
4. Min bending radium of cable :
It is no less than 15 times that of cable outer diameter for cable with three cores .
It is no less than 20 times that of cable outer diameter for cable with single core.
5. A . C. rated voltage of Uo/U of cable is 0.6/1kV~26/35kV.
U0: rated A.C. voltage of conductor to earth OR between metallic shielding for cable designing ,which is called phrase voltage.
U : rated A.C voltage between conductors for cable designing ,which is called wire voltage.
Um : Max endurable value of "Max system voltage" for cable.
Type,Description and Application Occasion
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Type
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Description
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Application occasion
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Cu
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Al
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YJV
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YJLV
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Power cable with XLPE insulation,PVC sheath
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To be laid indoors ,in the tunnel ,cable furrow,pipe or under soft soil .The cable can not bear mechanical force from outside .Single core cable isn’t permitted to be laid in the magnetic pipe.
|
|
YJY
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YJLY
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Cable with XLPE insulation ,PE sheath
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YJV22
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YJLV22
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Power cable with XLPE insulation,steel tape armor ,PVE sheath
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To be laid underground (depth of burying : at least 0.7m above earth),the cable can bear certain mechanical force ,but it can not bear great pulling force.
|
|
YJV23
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YJLV23
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Power cable with XLPE insulation steel tape armored PE sheath
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Note:
1. We also produce steel wire armored corss-linked power cable such as YJV32. YJLV63. YJV33. YJLV33 according to the requirement of the customer.
2. Prefix "ZR"( flame retardant type ) shall be added to the original type when flame retardant
type when flame retardant type cable is needed.
The Figure of cable structure
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Production Scope
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oD Size of Cable (oD: outer diameter)
.................
Main Technical Parameter of Cable
Max value of conductor DC resistance at 20℃ shall meet the requirement of category 2 conductor stipulated in GB/T3956 standard.
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Nominal cross section areaof conductor mm2
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Conductor max DC resistance at 20℃ Ω/km
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Nominal Cross section area of conductor mm2
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Conductor max DC resistance at 20℃ Ω/Km
|
|
Cu conductor
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Al conductor
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Cu conductor
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Al conductor
|
|
1.5
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12.1
|
/
|
95
|
0.193
|
0.320
|
|
2.5
|
7.41
|
/
|
120
|
0.153
|
0.253
|
|
4
|
4.61
|
7.41
|
150
|
0.124
|
0.206
|
|
6
|
3.08
|
4.61
|
185
|
0.0991
|
0.164
|
|
10
|
1.83
|
3.02
|
240
|
0.0754
|
0.125
|
|
16
|
1.15
|
1.91
|
300
|
0.0601
|
0.100
|
|
25
|
0.727
|
1.2
|
400
|
0.0470
|
0.078
|
|
35
|
0.524
|
0.868
|
500
|
0.0366
|
0.0605
|
|
50
|
0.387
|
0.641
|
630
|
0.0283
|
0.0469
|
|
70
|
0.268
|
0.443
|
800
|
0.0221
|
0.0367
|
A.C. Voltage Test under Power Frequency
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Rated voltage kV
|
0.6/1
|
1.8/3
|
3.6/6
|
6/6
6/10
|
8.7/10
8.7/15
|
12/20
|
18/30
|
21/35
|
26/35
|
|
Tested voltage kV
|
3.5
|
6.5
|
12.5
|
21
|
30.5
|
42
|
63
|
73.5
|
91
|
|
Testing condition : under environment temperature for 5 min.
Testing requirement: insulation without puncture
|
Partial discharging capacity shall be tested at the voltage of 1.73 U0,and its value shall be no more than that stipulated in the following table:
|
kV
Rated voltage
|
3.6/6
|
6/6
6/10
|
8.7/10
8.7/15
|
12/20
|
18/30
|
21/35
|
26/35
|
|
Test Requirement
|
Sensitivity 10 pc or better, Under 1.73 U0,it should not be detected any discharge exceeding declared sensitivity tested cable
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|
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