YJJJI2,.YJJTI2/YJ series 64/110kV silicone rubber integral prefabricated intermediate jointDetailed product description：

YJJJI2/YJ series 64/110kV silicone rubber integral prefabricated intermediate joint model:
YJJJI2/YJ (insulation type) YJJTI2/YJ (straight through type)

Product features:
1. The joint adopts cold shrink installation technology, which has the following advantages:
(1) Easy on-site installation;  
(2) The insulation interface of the joint will not leave any non-conductive particles due to friction from the external shielding of the cable;  
(3) The joint expansion is uniform and will not cause tearing due to excessive expansion;  
2. The high voltage shielding inside the joint adopts a special process, and there is no mold joint at the key position, so there will be no electrical trees during operation.  
3. The product adopts a three-layer composite structure, and the outer shielding layer is formed by injection molding. Compared with the spraying process, the surface resistance of the outer shielding layer is low and the grounding is reliable.  
4. The product is designed for a maximum operating voltage of 132kV, with a large margin to ensure long-term safe operation of the product
5. The joint shell adopts high-strength thick walled copper tube shell and waterproof insulation sealing structure, which has good mechanical protection and sealing performance, as well as good anti-corrosion ability, ensuring that the joint can operate in long-term harsh environments.  
6. 100% factory testing, stable quality.  
Product Applicability:
This product is suitable for cross-linked polyethylene power cables with a rated voltage of 64/110kV and a nominal cross-sectional area of 240mm2-1600mm2. It can ensure the connection between cables and also electrically disconnect the metal protective layer, shielding, and insulation shielding (semiconductive layer) of the cable to facilitate the grounding or cross interconnection of the cable outer protective layer, grounding protection, etc.  

YJJJI2/YJ series 64/110kV silicone rubber integral prefabricated intermediate joint performance indicators

	middle joint	Performance indicators
one	type	Overall prefabrication (cold shrinkage)
two	Direct connector model	YJJTI2/YJ
three	Insulation joint model	YJJJI2/YJ
four	Size [diameter/height] (mm)	φ260/1320
five	Allowable current carrying capacity for long-term continuous operation (A) (90 ℃)	Not less than the connecting cable
six	Rated voltage (Uo/U) (kV)	64/110
seven	Maximum operating voltage (Um) (kV)	one hundred and twenty-six
eight	Reference Stamping Voltage Endurance Level (BIL) (kV)	five hundred and fifty
nine	Stress cone semiconductor material	Imported liquid silicone rubber
ten	Enhance insulation materials	Imported liquid silicone rubber
eleven	Filler material	High voltage cable sealant
twelve	Storage conditions for the main components of the joint	dry
thirteen	Effective design life of joint (years)	30
fourteen	Enhance the relative dielectric constant of insulation	two point five
fifteen	Volume resistivity of enhanced insulation (W Ω· cm)	1.2×1015
sixteen	Conductor conduit
	a) Description of crimping process	Hexagonal molding
	b) Die size for crimping (mm)	Match with cable cross-section
	c) Maximum output of crimping machine (kg/cm ²)	Not less than 400
	d) Outer layer of wiring conduit	tin-plating
seventeen	Joint weight (kg)	～30
eighteen	Sealing form of joint	Cable sealant and waterproof tape
nineteen	Metal shielding layer of the joint
	a) Materials	Tin plated copper mesh and copper shell
	b) Specification and quantity	35 and copper shell with a cross-section not less than 120
	c) Equivalent cross-section (mm ²)	one hundred and fifty
	d) Withstand current during short circuit (kA, 3s)	Not less than the connecting cable
twenty	Insulation joint, metal sheath, insulation partition
	a) Materials	Polytetrafluoroethylene
	b) Withstand power frequency voltage (kV)	twenty
	c) Withstand impulse voltage (kV)	thirty-seven point five
twenty-one	Waterproof joint shell
	a) Materials	red copper
	b) Size/Weight (kg)	～1320／～30
twenty-two	Waterproof casting agent
	a) Materials	Insulating asphalt and hydroxyl mixture
	b) Weight (kg)	twenty-five

Schematic diagram of insulation and straight joint installation structure

1. Intermediate joint body 2, heat shrink tube 3, protective shell connecting ring 4, connecting tube
5. Semi conductive tape 6, copper protective shell 7, cable sealant 8, coaxial cable
9. Copper shielding mesh 10, semiconductive tape 11, insulating self-adhesive tape 12, heat shrink tubing