Cabo blindado VS cabo não blindado
Cabos blindados e não blindados são ambos tipos de cabos de alimentação, e são os dois tipos de cabos de alimentação mais comumente usados. Cabos de energia all consist of conductor, isolamento do condutor, e camada protetora externa.
O difference between armored cables and unarmored cables lies in the presence or absence of an armor layer. Comparado com cabos não blindados, armored cables have an additional metal protective structure, offering stronger resistance to pressure, impacto, rodents, and tensile strength. They can be used in direct burial, ar livre, e ambientes industriais agressivos.
Based on years of overseas project experience, ZMS Cables has found that most project failures are not due to product quality issues, but rather to incorrect application scenarios and incompatible armor configurations, leading to rework. This article will provide an in-depth analysis of these two types of cables to help customers mitigate risks.
What is unarmored cable?
Cabo blindado is a reinforced power cable with an additional metal armor layer between the cable insulation layer and the outer sheath. Common armor materials are steel tape and steel wire; aluminum tape armor can also be used depending on requirements.
The overall structure of armored cable, from the inside out, includes:
conductor → insulation layer → inner lining layer → metal armor layer → outer sheath.
The metal armor layer does not change the cable’s conductivity but can resist external forces such as compression, impacto, tensão, and animal bites, while also providing a certain degree of electromagnetic shielding.
Armored cables are mainly used in scenarios such as direct underground burial, outdoor cable trays, industrial plants, road crossings, and deep-buried pipelines.
Unarmored cable is basic power cable without any metallic armor protection layer.
The standard structure of unarmored cable only includes:
conductor → insulation layer → outer sheath.
Unarmored cable features: Estrutura simples, cabo flexível, pequeno raio de flexão, instalação fácil, and lower cost.
Unarmored cables lack mechanical protection and cannot withstand compression, impacto, or strong tension. Unarmored cables are only suitable for low-risk environments such as fully protected indoor conduits, enclosed cable trays, and internal equipment wiring.
| Tipo | Cabo blindado | Cabo não blindado |
|---|---|---|
| Estrutura | Metallic armor layer | No armor layer |
| Mechanical Protection | Pressure/impact/tensile resistant, anti-rodent/termite | No protection, easily damaged |
| Instalação | Subterrâneo, Enterro direto, trincheiras, locais industriais | Interior, cable trays, conduítes, protected areas |
| Características | Hard, heavy | Soft, flexível, light |
| Lifespan | Highly durable, long-lasting | Ages outdoors easily |
| Custo | Mais alto | More economical |
| Armor Type | Abbr. | Estrutura | Key Applications |
|---|---|---|---|
| Fita de aço blindada | Sta | Double steel tape, high crush resistance | Flat direct burial, municipal grids, standard ducts |
| Fine Steel Wire Armored | SWA | Stranded fine wires, alta resistência à tração | River/mountain crossing, aerial suspension, deep wells |
| Coarse Steel Wire Armored | CWA | Coarse wire reinforced, ultra-high tensile strength | Long-span suspension, mineração, heavy duty |
| Aluminum Tape Armored | Ata | Leve, resistente à corrosão, non-magnetic | High-corrosion environments, AC magnetic fields |
Based on overseas engineering standards and practical field experience, ZMS Cables summarizes a simple selection logic:
Scenarios for Choosing Armored Cables:
Scenarios for Choosing Unarmored Cables:
Many overseas inquiries suffer from repeated communication and low efficiency, primarily due to incomplete parameters.
We have compiled essential parameters for quick quotes, which engineers can directly refer to when submitting:
Q1: Can armored cables be used as shielded cables?
Q2: Can unarmored cables be temporarily laid outdoors?
Q3: Must armored cables be grounded?
Q4: Is there a difference in current carrying capacity between the two types of cables?
As a cable manufacturer that has long served overseas contractors and EPC contractors, we understand that overseas projects have higher requirements for stability and compliance.
Cabo ZMS manufactures its full range of armored and unarmored power cables in strict accordance with international standards such as IEC, Bobagem, e GB. The materials used in conductors, isolamento, armadura, and sheaths are fully controlled, eliminating potential engineering risks such as recycled materials and falsely labeled cross-sections.
Além disso, we can provide a complete set of factory test reports, qualification documents, and third-party certifications. We also support customized designs for flame-retardant, resistente ao fogo, resistente ao frio, and corrosion-resistant cables for special environments, matching the needs of various power distribution projects.
There is no absolute superiority or inferiority between armored and unarmored cables; it’s all about suitability for the specific application scenario. Unarmored cables are preferred for controlled indoor environments, while armored cables are essential for outdoor direct burial and harsh conditions to ensure long-term stable operation.
If you are unsure whether you require armored construction or how to choose models and standards, please send your project parameters and construction environment. ZMS Cable technical team will provide free professional selection solution and accurate quotation.
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