JB/T 14695-2024 in English
VALIDTest method for compatibility of natural esters for electrical insulation with structural materials
- Issued on:2024-03-29
- Implemented on:2024-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
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| Standard No: | JB/T 14695-2024 |
| Document status: | VALID |
| Title in English: | Test method for compatibility of natural esters for electrical insulation with structural materials |
| Title in Chinese: | 电气绝缘用天然酯与结构材料的相容性试验方法 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2024-03-29 |
| Implemented on: | 2024-10-01 |
| ICS Classification: | 29.035.01-Insulating materials in general |
| Chinese Classification: | K15-Electrical insulating material and its products |
| Professional Classification: | JB-Machinery |
| Related Keywords: | key test elements material type surface area ratio core test items judgment criteria
test method test conditions test design natural esters |
Introduction
Analysis of the core content of the standard
This document establishes for the first time a systematic compatibility evaluation system for natural ester insulating oil and structural materials of equipment such as transformers, focusing on solving the following technical problems:
- Quantification of material interactions: Simulating long-term operating conditions through accelerated aging tests
- Multi-dimensional evaluation indicators: Covering changes in physical, chemical and electrical properties
- Standardized test conditions: Specifying a unified aging temperature (105-130℃) and time (168h)
Comparison of key test elements
| Material type | Surface area ratio | Core test items | Judgment criteria |
|---|---|---|---|
| Sealing gasket | 65cm²/800mL | Volume change rate/hardness | GB/T 1690 |
| Enameled wire | 1300cm²/800mL | Breakdown voltage/bonding strength | GB/T 4074.5 |
| Core coating | 3-100cm²/400mL | Hardness/dielectric loss increment | GB/T 6739 |
Technology Evolution Analysis
Compared with the traditional mineral oil standard ASTM D3455, the innovation of this standard is reflected in:
- Adaptation to bio-based properties: A nitrogen protection step is added to address the easy hydrolysis of natural esters
- Accelerated test design: A sample contact area 4 times the actual ratio is used
- Multi-parameter linkage evaluation: It is required to simultaneously meet five indicators including acid value (≤0.1mgKOH/g) and dielectric loss (Δ≤0.04)
Implementation suggestions
Special attention should be paid to the following in actual applications:
- Pretreatment specifications: Paper samples must be vacuum dried, and rubber samples are exempt from drying
- Quality control points: The acid value increment of blank oil samples must be ≤0.02mgKOH/g
- Data validity: When the breakdown voltage drops by more than 10%, it should be judged as incompatible
Sample only — not a preview of JB/T 14695-2024
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