MV CCV Line for Medium Voltage Cable

35kV Cable Extrusion Line, Triple Extrusion

This MV CCV line is typically designed for triple extrusion of XLPE insulated medium voltage cables for use at voltages ranging from 6kV to 35kV. By absorbing world's advanced catenary continuous vulcanization (CCV) technology, Baicheng Miracle has developed and manufactured this three-layer extrusion dry cure cross-linking line in-house, which was the first in the domestic market.

Our independently developed three-layer crosshead has obtained national patent, due to its great convenience and ease of alignment. Furthermore, the patented control technology in catenary line is characterized by high resistance against interference, ensuring an exceptional stability.

Medium voltage cables manufactured by this extrusion line are supplied in diverse sizes, diameters, lengths, layer thickness and other technical specifications. Depending on applications, the produced XLPE insulated power cables can be laid directly in the ground or buried in underground ducts, also suitable for submerged under water and working on overhead transmission systems.

Features Triple extrusion process for XLPE insulated cables of voltages up to 35kV; Capable of manufacturing power cables used for a variety of applications; Computer control, touch screen operation, Siemens Portal software, and high-resolution HMI interface; Triple crosshead provides great convenience and ease of alignment; Customer-specific modified versions are available, which deviate from the standard version in speed adjustment by control of CV tube temperature; MV Cable Triple Extrusion Line (6 Sections)

Voltage class	XLPE: 6-35kV
Conductor size	Cu: 25-630mm2 Al: 35-800mm2
Max. cable weight	10kg/m
Max. cable diameter	70mm
Cable construction	Conductor screen (inner semiconductor layer) 0.5-2mm	Insulation 3.4-12mm	Insulation screen (outer semiconductor layer) 0.5-2mm
Line speed	0-30m/min
Line execution	Half catenary
Length of cross-linking section	Approx. 41m/6 sections (6 tubes)
Length of pre-cooling section	12m/2 sections (2 tubes)
Length of cooling section	54m/9 sections (9 tubes)
Arrangement of extruders	Φ65 extruder for conductor screen Φ150 extruder for cross-linked polyethylene (XIPE) Φ90 extruder for insulation screen
Electricity	Installation capacity 750kVA	380V ±10% 50Hz±1%	3 phase 4 wire
Water	Water pressure 0.2-0.6MPa	Water consumption 15m3/h (circulating water from reservoir)
Compressed air	0.6-0.8MPa	Air consumption 0.8m3/min
Nitrogen	Pressure 2.0-2.5MPa	Purity 99.5%	Consumption 1-2m3/h
Nitrogen storage tank	More than 6m3

MV Cable Triple Extrusion Line (9 Sections)

Voltage class	XLPE: 6-35kV
Conductor size	Cu: 25-630mm2 Al: 35-800mm2
Max. cable weight	10kg/m
Max. cable diameter	70mm
Cable construction	Conductor screen (inner semiconductor layer) 0.5-2mm	Insulation 3.4-12mm	Insulation screen (outer semiconductor layer) 0.5-2mm
Line speed	0-30m/min
Line execution	Half catenary
Length of cross-linking section	Approx. 54m/9 sections (9 tubes)
Length of pre-cooling section	12m/2 sections (2 tubes)
Length of cooling section	90m/15 sections (15 tubes)
Arrangement of extruders	Φ80 extruder for conductor screen Φ175 extruder for cross-linked polyethylene (XIPE) Φ100 extruder for insulation screen
Electricity	Installation capacity 1050kVA	380V ±10% 50Hz±1%	3 phase 4 wire
Water	Water pressure 0.2-0.6MPa	Water consumption 15m3/h (circulating water from reservoir)
Compressed air	0.6-0.8MPa	Air consumption 0.8m3/min
Nitrogen	Pressure 2.0-2.5MPa	Purity 99.5%	Consumption 1-2m3/h
Nitrogen storage tank	More than 6m3×2

Extruder & Crosshead
Extruder
Three-layer Crosshead Triple extrusion lines have three extruders connected to one common three-layer crosshead for the simultaneous extrusion of conductor screen layer, insulation layer and insulation screen layer. Technical Data of Extruders 65/20D Extruder Max. screw speed: 48rpm Gear reduction ratio: 32:1 Used for extruding conductor screen layer (inner semiconductor layer) 90/20D Extruder Max. screw speed: 41.5rpm Gear reduction ratio: 36:1 Extrusion output: 60kg/h Used for extruding insulation screen layer (outer semiconductor layer) 150/25D Extruder Max. screw speed: 40rpm Gear reduction ratio: 37.5:1 Extrusion output: 250kg/h Used for extruding insulation layer Technical Data of Three-layer Crosshead Technical Parameters Conductor diameter: 6-34mm Max. cable diameter: 70mm Extrusion thickness:
First layer: 0.5-2.0mm
Second layer: 2.0-12mm
Third layer: 0.5-2.0mm Heating method: oil or water heating Features Designed with circulating distribution flow channel and restrictor ring, the length of flow distributors and crosshead is greatly shortened in contrast to other three-layer crosshead, thus reducing its weight; Easy to disassemble for convenient cleaning; Providing great convenience and ease of alignment during extrusion process; Control System Highly resistant to interference, minimum fluctuation of cables in tube, ensuring stable running and easy to maintain; Control system is placed at the middle part of heating zone, it can protect cables from contacting the tube wall during heating process; When the control receives the signal of cable position, the rotation speed of lower capstan (pulling) will be adjusted accordantly; Details Pay-off Stand Accumulator Capstan

Take-up Stand

Accumulator End Seal Extruder Lower Capstan Pay off Stand Upper Capstan 35kV Cable Extrusion Line Tags cable extrusion solutions triple cross head simultaneous extrusion MV triple extrusion line dry cure catenary continuous vulcanization cable extruder haul off caterpillar