Metallic Shielding Power Cable
It is used for power transmission on power lines of rated voltage 0.6/1KV or lower .It has strong resistant characters against electromagnetic interference, thunder strike and even electric potential, improving power supply quality .It is especially suitable to place with precision electronic devices such as computer center, space & aviation supervision center and intellectual buildings etc.
Executive standard : GB / T 12706.1—2008
Type and Description
|
Type
|
Description
|
|
Cu
|
Al
|
|
VVP
VVP22
|
VLVP
VLVP22
|
Power cable with Cu/Al core, PVC insulation , metallic shielding (steel tape armor ),PVC sheath
|
|
YJVP
YJVP22
|
YJLVP
YJLVP22
|
Power cable with Cu/Al core , XLPE insulation , metallic shielding (steel tape armor ),PVC sheath
|
Note:1. We also produce cable with flame resistant performance or fire resistant performance according to the requirement of customer .Prefix “ZR-” should be added to the original type for flame retardant cable and “NH-” added for fire –resistant cable .
2. There are two kinds of metallic shielding .One is metallic wire braiding shielding .The other is metallic tape wrapped shielding .
3. Prefix “R” should be added to the original type for ordering cable with soft conductor .
Specification
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Type
|
Core number
|
Nominal cross section area
|
|
Cu
|
Al
|
|
VVP
YJVP
|
VLVP
YJLVP
|
1
|
4~300
|
|
VVP
VV22P
YJVP
YJV22P
|
VLVP
VLV22P
YJLVP
YJLV22P
|
2
|
4~185
|
|
3
|
4~300
|
|
3+1
|
|
4
|
4~185
|
Working Condition
1: Max long-term working temperature allowed by conductor is 70℃ for cable with PVC insulation ,90℃ for cable with XLPE insulation .
2: Max temperature of conductor is no higher than 160℃ for cable with PVC insulation ,250℃ for cable with XLPE insulation during short circuit (The longest lasting time is no more than 5 S).
3: Environment temperature for installation is not lower than 0℃ .
4: Bending radius allowed by cable is no less than 20 times that of cable outer diameter for armored cable ,15 times that for inarmored cable ,10 times that for cable with soft conductor.
Approximate Outer Diameter of Cable
Outer diameter value of VVP type and VLVP type cable should be added by 1~1.5mm on the basis of that of VV type and VLV type cable .
Outer diameter value of YJVP type and YJLVP type cable should be added by 1~1.5mm on the basis of that of YJV type and YJLV type cable.
Outer diameter value of VV22P type and VLV22P type cable should be added by 1~1.5mm on the basis of that of VV22 type and VLV22 type cable.
Outer diameter value of YJV22P type and YJLV22P type cable should be added by 1~1.5mm on the basis of that of YJV22 type and YJLV22 type cable.
Main Technical Parameter
1: DC resistance of conductor at 20℃
2: Insulated resistance
|
NO
|
Performance
|
PVC insulation
|
XLPE insulation
|
|
1
|
Volume resistance ration（20℃）
Under cable working temperature
|
1013
1010
|
--
1010
|
|
2
|
Insulation resistance constant（20℃）
Under cable working temperature
|
36.7
0.037
|
--
3.67
|
3: Finished cable should endure A.C voltage test of 3.5kV, AC 50Hz for 5min without puncture.
4: Fire resistant performance of fire resistance cable should meet testing requirement of category stipulated in IEC60331 or GB/T19666-2005 standard.
5: Flame retardant performance of Flame retardant cable should meet testing requirement of category A or B or C stipulated in IEC60332 or GB/T 18380.1.2.3 standard.
Delivery Length
Delivey length of cable depends on both agree-ments with length error allowance of ±0.5%.
