He 20KV medium voltage cable It is an essential component for modern electrical infrastructure. Its use extends widely in urban electricity distribution systems, industrial y rural. This article offers a deep look at the 20KV cable, Its variants, applications, normative, Technical specifications and real cases of implementation.
1. What is a medium voltage cable 20kv?
A medium voltage cable (MT) of 20 Kilovolts is a type of electric conductor designed to operate in networks with nominal tensions between 1kv and 36kv. The 20KV category is usually used in applications that require efficient electrical transmission at medium distances, and with mechanical demands, high thermal and environmental.
This type of cable is typically composed of:
Conductor of aluminum the copper (with increasing preference for aluminum for its cost-benefit and reduced weight).
Isolation With materials like XLPE (cross-linked polyethylene) o EPR (ethylene-propylene), both designed to withstand high dielectric tensions and temperatures above 90 ° C.
Semiconductor screen y Metal screen To contain the electric field and guarantee security.
External cover UV -resistant, humidity, Chemical agents and possible mechanical attacks.
2. Synonyms and terms related to 20kv medium voltage cable
Underground 20kV cable
Cable MT 20kV XLPE
Medium voltage power cable
Electric cable for 20kv distribution
Three -phase medium voltage power cable
These terms are usually used indistinctly in the electricity sector. However, They can present slight differences in application depending on the design (monophase, three -phase, armed, No armor, For air or underground installation, etc.).
3. 20KV medium voltage cable applications
Los cables 20kV They are used in multiple sectors:
Urban and suburban distribution networks: Distribution transformers feed.
Heavy industry: Refineries, cement plants, Metallurgical factories that require reliable internal networks.
Wind and Solar Parks: Energy transmission generated from investors to substations.
Large residential shopping centers and complexes: Medium voltage energy supply and then transform it to low voltage.
In all these cases, Energy efficiency is prioritized, durability, corrosion resistance and facility.
4. Regulations and technical standards
To guarantee quality and safety, Medium voltage cables must comply with international regulations:
IEC 60502-2: Energy cables with extruded insulation and its use in medium voltage systems.
A 21123: Spanish regulations for cables up to 36kv.
ICEA S-93-639 / No toilet: North American standards.
IEEE 404 / IEEE 48: Applicable to endings and splices.
These regulations regulate aspects such as dielectric resistance, Partial download test, inflammability, mechanical resistance, etc.
5. Technical Specifications Table: Cable 20kv Monochonductor and three -phase (1x y 3x)
Section (mm²) Type DIALETER EXT. (mm) Weight (kg/km) Resistance Ω/km (20°C) Admissible current (A) 25 1x 27 360 1.20 130 25 3x 73 1080 1.20 110 35 1x 28 420 0.868 150 35 3x 75 1260 0.868 125 50 1x 30 470 0.641 180 50 3x 78 1410 0.641 150 70 1x 33 570 0.443 215 70 3x 83 1710 0.443 180 95 1x 36 680 0.320 260 95 3x 88 2040 0.320 215 120 1x 38 780 0.253 295 120 3x 92 2340 0.253 240 150 1x 41 900 0.206 335 150 3x 96 2700 0.206 270 185 1x 44 1030 0.164 375 185 3x 100 3090 0.164 300 240 1x 48 1260 0.125 430 240 3x 105 3780 0.125 340 300 1x 52 1520 0.100 490 300 3x 110 4560 0.100 385 400 1x 58 1940 0.0778 560 400 3x 117 5820 0.0778 430 500 1x 63 2380 0.0605 630 500 3x 123 7140 0.0605 475 630 1x 68 2950 0.0469 715 630 3x 130 8850 0.0469 525 800 1x 75 3680 0.0367 810 800 3x 140 11040 0.0367 580
6. Real cases and application examples
Case 1: Wind Project in Patagonia (Argentina)
In a 40MW plant, Section 20kV cable was used 240 mm², XLPE, unipolar, To connect wind turbines to the elevator substation. Extreme climatic conditions demanded an HDPE roof resistant to UV radiation and wind abrasion.
Case 2: Subterraine network in dense urban zone (Space)
To replace an obsolete air network, A three -phase cable was installed×150 mm² of 20kv under a downtown street. Cable design included steel tape armor for greater mechanical protection. The underground installation helped reduce interruptions and improved urban aesthetics.
7. Key factors to select a 20KV cable
When selecting the type and section of a medium voltage cable, The following aspects should be considered:
Line (To avoid excessive tension drop)
Required current
Thermal conditions of the environment
Presence of humidity or corrosive agents
Installation mode (Underground, In tray, in tube, air, Buried directly)
A common mistake is to oversize the cable, which unnecessarily elevates the cost. It is advisable to use electrical calculation software or consult manufacturer.
8. Conclusion: The strategic value of the 20kv cable
Investing in a good medium voltage cable of 20KV not only guarantees energy continuity, It reduces long -term maintenance costs, Joule effect losses and operational failures. Choosing adequate cable according to real regulations and conditions of service is a technical decision that must involve engineering, Logistics and long -term vision.
If you are looking for Technical Advice on what type of 20kV cable it best suits your project or you want a quote with technical file, Do not hesitate to contact us.
