1kV-35kV flame retardant XLPE insulated power cable
This product is manufactured according to the standard GB1270 "copper core and aluminum core plastic insulated power cable with rated voltage 35kV and below," and it can also be produced according to user needs according to the recommended standards of International Electrotechnical Commission IEC, British standard, German standard and American Standard.
Scope of application:
This product is applicable to power distribution line for power distribution at rated voltage 3.6/kV-26/35kV.
The rated voltage Uo/U is 3.6/6KV-26/35KV.
The permitted long term high working temperature of cable conductor is 90 C.
* short circuit (duration not exceeding 5S) cable conductor high temperature not exceeding 250 C.
When the cable is laid, the ambient temperature should be no less than 0 C.
Cable bending radius: three core cable is not less than 15 times of cable outer diameter; single core cable is not less than 20 times of cable diameter.
Selection of cable rated voltage
The rated voltage of the cable should be suitable for the operation of the cable system, expressed in Uo/U (Um) KV.
Rated power frequency voltage between conductor to ground or metal shield for Uo-- cable design.
Rated power frequency voltage between conductors for U-- cable design;
The high value of the "high system voltage" that the Um-- device can withstand.
The Uo values of the cables for three-phase systems are recommended as follows:
A and B systems
Class C system
Seven point two
Three point six
Eight point seven
Seventeen point five
Eight point seven
Forty point five
Class a system -- any phase conductor of the system can be separated from the system in 1min when it contacts with the ground or grounding conductor.
Class B system -- the system includes the conditions of short-time operation of single-phase grounding fault, and the grounding fault time should not exceed 1H, but in any case, it will not exceed 8h for a long time. The total duration of ground fault will not exceed 125h per year.
The C class system is not a class B system.