Ehv Cable, High Voltage Cable, Hv Cables

Construction Of Cable                                                             



CABLE STANDARDS                                                                  
GB/T11017,GB/Z18890,GB/Z22078,IEC and etc. upon request.
 
Specification And Name
1. YJLW02 
Power Cable with Copper Conductor, XLPE Insulation, Corrugated Aluminum Sheath, PVC Outer Sheath
2. YJLW02-Z 
Longitudinal Water-blocking Power Cable with Copper conductor, XLPE Insulation, Corrugated Aluminum Sheath, PVC Outer Sheath
3. YJLW03 
Power Cable with Copper Conductor, XLPE Insulation, Corrugated Aluminum Sheath, PE Outer Sheath
4. YJLW03-Z 
Longitudinal Water-blocking Power Cable with Copper Conductor, XLPE Insulation, Corrugated Aluminum Sheath, PE Outer Sheath
5. YJLLW02 
Power Cable with Aluminum Conductor, XLPE Insulation, Corrugated Aluminum Sheath, PVC Outer Sheath
6. YJLLW02-Z 
Longitudinal Water-blocking Power Cable with Aluminum Conductor, XLPE Insulation, Corru-gated Aluminum Sheath, PVC Outer Sheath
7. YJLLW03 
Power Cable with Aluminum Conductor, XLPE Insulation, Corrugated Aluminum Sheath, PE Outer Sheath
8. YJLLW03-Z 
Longitudinal Water-blocking Power Cable with Aluminum Conductor. XLPE Insulation, Corrugated Aluminum Sheath, PE Outer Sheath

Operating Environment
1. Max admissible temperature for conductor: 
90ºC under normal running condition; 250ºC under short circuit(max. duration is 5s)

2. Min bending radius is recommended to be 20 times of cable overall diameter

3. PVC sheathed cables shall not be installed if the environment temperature is below 0ºC,and if it is below 0ºC,the cable should be heated before the installation

Metal Sheath
1. Cables with corrugated aluminum sheath can be especially suitable for the following conditions in addition to the normal ones
2. Cables with corrugated aluminum sheath: places where there is not much corrosion but much requirement for mechanical strength (e.g. direct connection to transformers, laying on bridges and in vertical shafts)

Plastic Outer Sheath
1. Cables with PVC outer sheath ( Type 02 ) are suitable for high voltage transmission line with general fireproof requirement and centain insulation requirement for the outer sheath

2. Cables with PE outer sheath( Type 03 )are suitable for high voltage transmission line directly buried underground with higher insulation requirement on the outer sheath; and if they are laid in tunnels or vertical shafts, anti-fire and flame-retardant measures must be taken

XLPE Insulation Corrugated Aluminum Sheath For Rated Voltage Of 50/66kV


 

XLPE Insulation Corrugated Aluminum Sheath For Rated Voltage Of 50/66kV


 

XLPE Insulation Corrugated Aluminum Sheath For Rated Voltage Of 64/110kV


XLPE Insulation Corrugated Aluminum Sheath For Rated Voltage Of 64/110kV


XLPE Insulation Corrugated Aluminum Sheath For Rated Voltage Of 127/220kV


 
XLPE Insulation Corrugated Aluminum Sheath For Rated Voltage Of 64/110kV


 


Current-carrying capacity and import factors


 
Current-carrying capacity and import factors




 

Short Circuit Current  Unit:KA/1S


 

Process Flow Chart




Drawing Machine
Equipment Characteristics
1. Non-clip drawing machine with 13 dies and separate driving motors
2. Continuous annealing
3. Inert gases protection
4. Antioxidation material application
5. Continuously dual bobbins spooling

Frame-type Stranded RFS630-84
Technical Characteristics
1. Produce circular compacted conductor with cross sectional area up to and including It00 mm'
2. Produce the segment in milliken conductor with cross sectional area up to and including 3000mm²
3. Compacting coefficient comes to 0.89
4. Continuously automatic loading/unloading
5. With Max. Line speed of 60m/min
6. Intelligent control
 
Drum Twist Stranded DTPC3600
Technical Characteristics
1. Milliken conductor stranding into cironlarshape
2. Produce Milliken conductor with cross-sectional area up to atincluding 3000hnm²
3. Taping with constant tension

VCV Production Line
Equipment Characteristics
1. Maillefer water cooling extruder unit is most suitable for extrusion of high voltage XLPE.
2. Central Water Station Temperature Control:no noise,being easy to control temperature and pressure,being equipped with precise proportional valve to ensure stable,temperature control and having no effect on generator room's constant temperature(extremely critical for high-pressure production).
3. The best crosshead focusing on production of high voltage cables or extra high viltage cables is Maillefer's flat crosshead, which is characterized with fast and stable flow rate,eliminating the entangling risk .Tue to its long flows,there is no temperature interference between inner and outer shield layers and insulation layer.
4. Energy efficient direct tube heating system.
5. Maillefer is the first company who proposed the concept of post-heating and using the most stable pre-heating machine called YIFUDE in the world.

Degas
 
Equipment Characteristics
1. Regular gas-exchange
2. Intelligent temperature control
 
Technical characteristics
1. expertise, its function is to eliminate the residual gas of VCV production process.
2. eliminate the insulation thermal stress insulation heating stress further.

Metallic Sheath Production Line
Equipment Characteristics
1. Welding with double torch, and neat screen
2. Welding various materials such as copper,aiummum and stainless steel
3. Metallic sheath diameter is up to and including 200mm²
4. Online inspection for the welding scam flaw
 
Technical characteristics
1. With continues wave, free adjustment of the depth and pitch
2. Even thickness of the metal sheath,without any eccentricity,sand hole,blister and transverse crack
3. Outstanding water blocking performance
4. Meeting short-circuit current capacity

Outer Sheath Production Line
Equipment Characteristics
1. Two extruders with diameter of 911 and 1511 running together can realize the extrusion of single layer or double layers with different materials simultaneously
2. With graphite coating equipment
3. Measuring device for the overall diameter
4. Jetting, printing and meter counting equipment
5. Max. Diameter for the pay-off drum and take-up drum is 4200mm
 
Equipment Advantage
1. Produce outer sheath with cable overall diameter up to and including 200mm
2. Excellent control for outer diameter and eccentricity

Test System
Equipment Characteristics
1. All-metal shielding mom with dimension of 35m x 30m x 20m
2. Series resonant system with max. voltage of 700kV, 35A
3. Tests for resistance, capacitance, and dielectric loss, partial discharge and withstand voltage
4. Max. Load capacitance of 637μf

Package
1. Pack according to national standard or customer' s require-ment;
2.  Professional package design, firm and durable,protect the cable effectively