MH/T 6049-2020 in English
VALIDUnderground electrical cable for airport lighting circuits
- Issued on:2020-07-20
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
$330.00
| Standard No: | MH/T 6049-2020 |
| Document status: | VALID |
| Title in English: | Underground electrical cable for airport lighting circuits |
| Title in Chinese: | 机场助航灯光回路用埋地电缆 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2020-07-20 |
| Implemented on: | 2020-10-01 |
| Superseding: |
MH/T 6049-2008 Underground Electrical Cable for Airport Lighting Circuits
|
| ICS Classification: | 49.100-Ground service and maintenance equipment |
| Chinese Classification: | V56-AGS system and equipment |
| Professional Classification: | MH-Civil Aviation |
| Related Keywords: | airport runway navigation
4f-level airport electrical cable power frequency voltage hot extension test withstand voltage test |
| Related Topics: | light
Airport mh/t loop Buried ground wire mh/t 6049-2008 mh/t 6027 sail help navigation light to bury Airport loop insulation resistance |
本标准规定了机场助航灯光回路用埋地电缆的型号、规格、命名、代号、产品表示方法、使用特性、技术要求、试验、产品验收规则、成品电缆标志及电缆包装、运输和保管。
本标准适用于机场助航灯光串联主回路用电缆的制造、验收和交付。
Introduction
Background of Standard Revision and Technological Evolution
MH/T 6049-2020, as a mandatory standard for the civil aviation industry, replaces the 2008 version of the specification and mainly aims to upgrade the power transmission safety of airport runway navigation lighting systems. With the average annual growth of civil aviation transport volume of 8.3%, the power density of lamps has increased by 42%. The new version of the standard focuses on strengthening:
| Technical Dimensions | 2008 Edition | 2020 Edition | Upgrade Points |
|---|---|---|---|
| Conductor DC Resistance | GB/T 3956 Class 2 | Add Class 5 soft conductor | Adapt to high flexible wiring scenarios |
| Partial Discharge Test | 10pC@15kV | 5pC@18kV | Detection Sensitivity Increased by 50% |
| Sheath Integrity | Power frequency spark test | Added 11.2kV DC test | Enhanced anti-penetration capability |
Analysis of core technical requirements
1. Conductor and shielding structure
The conductor is made of tinned copper conductor with a cross-section of 6mm², which meets the GB/T 3956 Type 2 (round) or Type 5 (soft conductor) specifications. The key innovations include:
- Double-layer shielding system: conductor shield thickness ≥0.15mm, insulation shield ≥0.30mm
- Metal shielding layer: copper tape thickness ≥0.07mm, overlapping rate ≥15%
2. Insulation material performance
It is recommended to use Water-tree-resistant cross-linked polyethylene (TRXLPE), and its key parameters are compared:
| Indicator | XLPE | TRXLPE | EPR |
|---|---|---|---|
| Operating temperature | 90℃ | 90℃ | 90℃ |
| tanδ(×10⁻⁴) | ≤80 | ≤80 | ≤400 |
| Water tree suppression | No | Yes | Partial |
Implementation Suggestions
Typical Application Cases
A 4F-level airport uses DYJY-5kV 1×6mm² cable. Note the following during construction:
- Bending radius ≥12 times the outer diameter (actually measured 15.9mm needs to be kept above 190mm)
- When the burial depth is ≥0.8m, HDPE protective pipe needs to be installed.
- Triple waterproof treatment is used at the joints.
Key points of the test method
The type test includes 7 categories and 32 tests, among which the key items are:
- 4h withstand voltage test: no breakdown under 20kV power frequency voltage
- Hot extension test: TRXLPE permanent deformation ≤5%
- Shield peeling force: within the range of 4-45N and no residue
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