Explanation of the meanings of letters in communication cable models

The letter combination in the communication cable model represents key information such as the structure, material, purpose, and technical parameters of the cable. The following will provide detailed explanations from three aspects: naming conventions, common letter meanings, and typical model examples.

1、 Naming rules for communication cable models

The communication cable model is usually composed of a combination of letters and numbers, with each part representing different technical parameters and structural features. Taking local telephone cables as an example, their naming rules can be divided into the following parts:

1. ‌First letter‌：

   • 'H' is a fixed identifier for naming local telephone cables, representing 'local communication cables'. Models such as HYA, HYAT, HYV, etc. that start with' H 'indicate that they belong to the category of local telephone cables

   • 'M' stands for coal mine specific communication cables, such as MHYV, MHYAV, etc

   • 'R' stands for flexible cable, such as RVVP

2. ‌Middle letter‌：

   • 'Y': Polyolefin insulation (such as HYA, HYAT)

   • 'V': Polyvinyl chloride insulation (such as HYV)

   • 'A': Aluminum plastic composite sheath (such as HYA)

   • 'T': Filled structure (filled with waterproof grease inside, such as HYAT)

   • 'C': Self supporting structure (such as HYAC)

   • 'P': Shielding structure (such as RVVP)

   • Indicating insulation material and sheath structure:

3. ‌Tail number‌：

   • '22': Steel belt armor, PVC outer sheath (such as HYA22)

   • '33': Thin steel wire armor, polyethylene outer sheath (such as HYAT33)

   • '53': Double layer longitudinal rolled steel strip armor, polyethylene outer sheath (such as HYAT53)

   • 'G': Steel frame reinforcement (such as HYATG)

   • Representing special structures or protective properties:

2、 Detailed explanation of common letter meanings

1. Insulation material letters

• ‌YRepresenting polyolefin insulation, it has excellent electrical performance and resistance to environmental stress cracking, such as the 'Y' in HYA, HYAT and other models

• ‌V: Represents polyvinyl chloride insulation, with lower cost but slightly inferior electrical performance, such as the 'V' in HYV, MHYV and other models

2. Sheath structure letters

• ‌A: Represents aluminum-plastic composite sheath, made of aluminum strip and plastic composite, with good moisture-proof and shielding performance, such as' A 'in HYA, HYAT and other models

• ‌V: Represents polyvinyl chloride sheath, such as the second 'V' in models HYV, RVVP, etc

3. Special structural letters

• ‌T: Represents a filled structure, filled with waterproof grease inside, with excellent moisture resistance, such as HYAT

• ‌C: Represents a self-supporting structure with reinforced elements that can be directly overhead laid, such as HYAC

• ‌P: Represents shielding structure, usually copper wire braided shielding, such as the 'P' in RVVP, HYVP and other models

4. Usage classification letters

• ‌MRepresenting communication cables used in coal mines, such as MHYV, MHYAV, etc

• ‌ZR: Represents flame-retardant cables, such as ZR-HYA

• ‌WDZ: Represents halogen-free low smoke flame-retardant cables, such as WDZ-HYA

3、 Typical model letter meaning example

4、 Selection suggestions

Understanding the meaning of letters when choosing a communication cable model can help with accurate selection:

1. ‌insulating materialPolyolefin (Y) has better performance than polyvinyl chloride (V), but the cost is higher

2. ‌Sheath typeAluminum plastic (A) sheath has better moisture resistance than polyvinyl chloride (V) sheath

3. ‌special requirementsChoose models with T (filling type) for humid environments, and models with P (shielding) for severe electromagnetic interference

4. ‌Usage environmentHYA series for ordinary environments, MHYV series for special environments such as coal mines

5. ‌Protection requirementsWhen mechanical protection is required, choose armor models with numbers (such as HYA22, HYA53)

This article was generated by AI