DL/T 5284-2019 in English

VALID

Technical specification for concrete dam safety monitoring system construction

Issued on:2019-06-04
Implemented on:2019-10-01
File Format:PDF
Delivery:Via email within 10 business days

Price(USD)： $1,410.00
$1,368.00

Standard No:	DL/T 5284-2019
Document status:	VALID
Title in English:	Technical specification for concrete dam safety monitoring system construction
Title in Chinese:	碳纤维复合材料芯架空导线施工工艺导则
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 10 business days
Issued on:	2019-06-04
Implemented on:	2019-10-01
Superseding:	DL/T 5284-2012 Guide for Construction and Acceptance of Carbon Fibre Complex Core Aluminium Stranded Wire
Professional Classification:	DL-Electricity
Related Topics:	carbon fiber carbon fiber material carbon fiber material Overhead lines Carbon fiber and composite material testing Composites and Engineering dimensional superconducting material carbon wire process linearity Carbon fiber composite material New carbon fiber material composite carbon fiber carbon fiber standard fiber composites fiber composites carbon wire Composite carbon fiber sheet hollow carbon fiber construction technology Carbon fiber composite material hollow carbon fiber Lightning Protection and Grounding Technical Guidelines for Optical Fiber Composite Overhead Ground Wires carbon fiber wire overhead wire construction technology carbon fiber wire composite material fiber composite loading Thread Lifter Carbon fiber composite materials for aircraft Carbon fiber composite processing Carbon fiber material national standard The carbon film process must be qualified Process water conductivity dl/t2011-2019 dl/t1966-2019 dl/t5784-2019 dl/t5787-2019 dl/t 5786-2019 dl/t 799 -2019 dl/t 5796-2019 dl/t 2019

Introduction

Core requirements for the construction of carbon fiber composite core conductors

According to the revised 2019 version of the standard, the construction of carbon fiber composite core conductors (models such as JLZ2X1/F2A-1660/95) requires attention to the following key parameters: tension control shall not exceed 20%RTS, pulley envelope angle ≤25°, line section length 6-8km (soft aluminum type shall not exceed 6km), etc.

Comparison of new and old standards

Technical indicators	DL/T 5284-2012	DL/T 5284-2019	Revision points
Paying-off tension	Not clearly specified	≤20%RTS	New mandatory requirements
Construction machinery and tools	General equipment	Special assembled tractor	Add anti-shrinkage core design
Crimp inspection	Maximum distance to edge	Increase the minimum allowable value (0.86D-0.2mm)	Prevent overvoltage damage

Detailed explanation of key construction processes

1. Tension pay-off control

For conductors below 710mm², the tension machine drum diameter must be ≥50 times the conductor diameter; for conductors 1660mm², it must be ≥2200mm. The bottom diameter of the wire-laying pulley groove should meet the following requirements:

Conventional conductor: ≥30 times the diameter
Large-section conductor: ≥1500mm

2. Crimping technical specifications

Three elements of crimping quality:

The distance between the edges is controlled at (0.86D±0.2)mm
The curvature of the connecting tube is ≤1% of the tube length
The curvature of the crimping area of the tension clamp is ≤2%

Typical problem case: Due to the use of non-special pressing molds in a certain project, the ovality of the crimping tube exceeded the standard and needed to be sawed off and re-pressed.

Construction quality assurance measures

Links	Key control points	Inspection methods
Core rod connection	Wedge clamp preload inspection	Vernier caliper measurement of l3/l4 dimensions
Aluminum tube crimping	Even application of power grease	Three-way distance detection
Accessory installation	Wire lifter envelope angle ≤25°	On-site measurement with an inclinometer

Implementation suggestions: For important spans, it is recommended to adopt a fixed-length pay-out process to reduce the number of times the joint pipe passes the pulley and reduce quality risks.

More samples: QC/T 942-2021 JJG 21-2008 NB/T 47013.2-2015

Sample only — not a preview of DL/T 5284-2019

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