YJV 62 8.7/15kV1×630

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Scope of Application
This product is suitable for transmission and distribution of power on lines with rated AC voltage of 35kV and below. It is often used in urban underground power grid, outgoing lines of power stations, internal power supply of industrial and mining enterprises and underwater power transmission lines crossing rivers and seas.

Standard Implemented
This product complies with GB/T 12706 Extruded Insulated Power Cables with Rated Voltage from 1kV (Um=1.2kV) to 35kV (Um=40.5kV), GB/T 12706.2 Part II: Rated Voltage from 6kV (Um=7.2kV) to 30kV (Um=36kV), and GB/T 12706.3 Part III: Rated Voltage 35kV (Um=40.5kV).

Usage Characteristics
1. The allowable long-term working temperature of cable conductor is:

The highest temperature of conductors of various insulated cables (GB/T12706.2 Part II)

Insulating compound	Maximum temperature of conductor ℃
Insulating compound	normal operation	Short circuit (the longest lasting 5S)
Polyvinyl chloride (PVC/A) Conductor cross-sectional area≤300mm² Conductor cross-sectional area＞300mm² Cross-linked polyethylene (XLPE)	70 70 90	160 140 250

The highest conductor temperature of the XLPE insulated composite cable (GB/T12706.3 Part III)

Insulating compound	Maximum temperature of conductor ℃
Insulating compound	normal operation	Short circuit (the longest lasting 5S)
Cross-linked polyethylene (XLPE)	90	250

2. The ambient temperature during cable laying shall not be lower than 0℃;
3. Minimum allowable bending radius during cable laying:

Project	Single core cable		Multi-core cable
Minimum bending radius of cable during installation	Unarmored	Armored	Unarmored	Armored
	20D	15D	15D	12D
Note: D is the outer diameter of the cable

4. Rated voltage
GB/T 12706.2 Part II: The rated power frequency voltage of the cable: U0/U (Um): 3.6/6 (7.2) kV, 6/6 (7.2) kV, 6/10 (12) kV, 8.7/10 (12) kV, 8.7/15 (17.5) kV, 12/20 (24) kV, 18/30 (36) kV;
GB/T 12706.3 Part III: The rated power frequency voltages of the cable: U0/U (Um): 21/35 (40.5) kV and 26/35 (40.5) kV.
U0: rated power frequency voltage between conductor and ground or metal shield for cable design;
U: rated power frequency voltage between conductors for cable design;
Um: the maximum value of the "highest system voltage" that the equipment can withstand.

Routine Tests

Rated voltage U0 (kV)	6	8.7	12	18	21	26
Test voltage U (kV)	21	30.5	42	63	73.5	91
Duration (min)	5	5	5	5	5	5

Partial discharge shall be in accordance with GB/T 3048.12-2007. When the voltage is 1.73 U0, there is no partial discharge, and the insulation has no breakdown after 5min voltage test.
The flame retardant, halogen-free and low-smoke cables meet the requirements of GB/T 19666-2019 and GB/T 18380-2008.

Common cable model

Model		Name
Copper core	Aluminum core
YJV YJY YJV22 YJV23 YJV32 YJV33	YJLV YJLY YJLV22 YJLV23 YJLV32 YJLV33	XLPE insulated and PVC sheathed power cable XLPE insulated polyethylene or polyolefin sheathed power cable XLPE insulated steel tape armored PVC sheathed power cable XLPE insulated steel tape armored PE or polyolefin sheathed power cable XLPE insulated thin round steel wire armored PVC sheathed power cable XLPE insulated thin round steel wire armored PE or polyolefin sheathed power cable
The models in the table do not include flame retardant properties