什麼是 BS5308/PAS5308 儀表電纜？
What is BS5308/PAS5308 Instrumentation Cable?
什麼是 BS5308/PAS5308 儀表電纜？
1. Product Overview / 產品概述
BS5308 is the British Standard that specifies requirements for instrumentation cables used in process control and measurement applications. The standard covers cables with Polyethylene (PE), Polyvinyl Chloride (PVC), Cross-Linked Polyethylene (XLPE), and Low Smoke Zero Halogen (LSZH) insulation materials, including armoured variants for mechanical protection.
As documented in professional instrumentation cable resources[1], while the original British Standard BS5308 was superseded by the Harmonised Standard BS EN 50288-7 in 2005, it remains widely referenced because the Harmonised Standard does not fully account for the higher voltage ratings (300/500V) and established cable dimensions that industry has standardized upon. A publicly available version was published as PAS5308 in 2009, incorporating additional options including XLPE insulation, core colour coding, and updated electrical testing parameters.
產品概述
BS5308 是英國標準，規定了用於過程控制和測量應用的儀表電纜要求。該標準涵蓋聚乙烯（PE）、聚氯乙烯（PVC）、交聯聚乙烯（XLPE）和低煙無鹵（LSZH）絕緣材料的電纜，包括用於機械保護的鎧裝版本。
根據專業儀表電纜資源文獻[1]，雖然原始英國標準 BS5308 於 2005 年被協調標準 BS EN 50288-7 取代，但它仍被廣泛引用，因為協調標準並未完全涵蓋工業已標準化的較高電壓額定值（300/500V）和既定電纜尺寸。2009 年發布了公開可用版本 PAS5308，增加了 XLPE 絕緣、芯線顏色編碼和更新的電氣測試參數等選項。
2. BS5308/PAS5308 Standard Structure / 標準結構
The BS5308/PAS5308 standard is divided into two main parts based on the primary insulation material, with each part further categorized into types based on armour construction:
Polyethylene insulated instrumentation cables in pairs with or without screen(s). Options for SWA or SWA with lead sheath.
- Type 1: Unarmoured – CAM or ICAM screened, PE insulated, PVC sheathed
- Type 2: Armoured – CAM or ICAM, PE bedded, SWA, PVC sheathed
- Type 3: Armoured – Lead alloy sheath, SWA, PVC sheathed
PVC insulated instrumentation cables in multicore and multi-pair construction, with or without screens and armour.
- Type 1: Unarmoured – PVC insulated, PVC sheathed
- Type 2: Armoured – PVC bedded, SWA, PVC sheathed
標準結構說明
BS5308/PAS5308 標準根據主要絕緣材料分為兩個主要部分，每個部分根據鎧裝結構進一步分類。第 1 部分涵蓋聚乙烯（PE）絕緣儀表電纜，包括無鎧裝（類型 1）、鋼絲鎧裝（類型 2）和鉛合金護套鎧裝（類型 3）變體。第 2 部分涵蓋 PVC 絕緣電纜，提供無鎧裝（類型 1）和鋼絲鎧裝（類型 2）配置。
3. Construction Comparison: BS5308, PAS5308, BS EN 50288-7 / 結構比較
The following comprehensive table compares the construction specifications across the three related standards:
| Parameter 參數 | BS5308-1 | BS5308-2 | PAS5308-1 | PAS5308-2 | BS EN 50288-7 |
|---|---|---|---|---|---|
| Conductor 導體 | Plain annealed Cu, solid/stranded (BS6360) | Plain annealed Cu, stranded (BS6360) | Multi-stranded (BS EN 60228) | Multi-stranded (BS EN 60228) | Plain/metal-coated (IEC 60228) |
| Conductor Size 導體尺寸 | 0.5 – 1.5 mm² | 0.5 – 1.5 mm² | 0.5 – 2.5 mm² | 0.5 – 2.5 mm² | 0.5 – 4.0 mm² |
| Voltage Range 電壓範圍 | 300/500V | 300/500V | 300/500V | 300/500V | 90V, 300V, 500V |
| Insulation 絕緣 | PE Type 03 | PVC Type TI1 | PE / XLPE | PVC Type TI51 | PVC/PE/XLPE/HFFR |
| Formation 成型 | Core pair twisted quad | Core pair twisted quad | Core pair twisted quad | Core pair twisted quad | Twisted pair/triple/quad |
| Screen 屏蔽 | Al/PET tape | Al/PET tape | Al/PET tape | Al/PET tape | Al/PET tape |
| Drain Wire 排流線 | Solid/stranded tinned Cu | Solid/stranded tinned Cu | Solid/stranded tinned Cu | Solid/stranded tinned Cu | Solid tinned Cu |
| Inner Sheath 內護套 | PE Type 2C / PVC TM1 | PVC Type TM1 | PE Type 2 / PVC TM51 | PVC Type TM51 | PVC/PE/LSZH |
| Armour 鎧裝 | GSWA | GSWA | GSWA | GSWA | SWA |
| Outer Sheath 外護套 | PVC Type TM1 | PVC Type TM1 | PVC Type TM51 | PVC Type TM51 | PVC/PE/LSZH |
結構比較說明
PAS5308 相比原 BS5308 標準擴展了導體尺寸範圍至 2.5mm²（原為 1.5mm²），並增加了 XLPE 絕緣選項。BS EN 50288-7 提供了最廣泛的導體範圍（0.5-4.0mm²）和絕緣材料選擇，但其電壓額定值範圍包括較低的 90V 和 300V 等級，可能不適用於所有工業應用。
4. Screening Configurations / 屏蔽配置
BS5308/PAS5308 cables utilize aluminium/polyester tape (Al/PET) screening to provide electromagnetic compatibility (EMC) and protection against electrical noise interference, which is critical for accurate 4-20mA signal transmission in industrial process control.
🛡️ Screening Abbreviations 屏蔽縮寫說明
- CAM (Collective Aluminium/Mylar) 總屏蔽: Overall screen applied collectively around all pairs/triples – basic EMI protection for general industrial environments
- IAM (Individual Aluminium/Mylar) 個別屏蔽: Individual screen applied to each pair/triple – crosstalk reduction between circuits
- ICAM / ICAT (Individual & Collective) 個別+總屏蔽: Both individual pair screening AND overall collective screen – maximum protection for critical instrumentation
屏蔽配置說明
BS5308/PAS5308 電纜採用鋁/聚酯帶（Al/PET）屏蔽，提供電磁兼容性（EMC）和抗電氣噪聲干擾保護，這對於工業過程控制中準確的 4-20mA 信號傳輸至關重要。ICAM（個別+總屏蔽）推薦用於關鍵的 4-20mA 模擬信號傳輸，需要同時最小化電路間串擾和外部電磁干擾。CAM（僅總屏蔽）通常適用於 HART 或現場總線信號等數字通信協議。
5. Electrical Parameters / 電氣參數
BS5308/PAS5308 instrumentation cables are designed for low-voltage signal transmission in process control applications, compatible with standard 4-20mA current loop and voltage signal interfaces.
電氣參數說明
BS5308/PAS5308 儀表電纜專為過程控制應用中的低壓信號傳輸而設計，與標準 4-20mA 電流迴路和電壓信號接口兼容。300/500V 額定電壓確保適用於大多數工業儀表應用。高絕緣電阻（≥100 MΩ·km）確保信號完整性和精確測量。
6. Thermal Performance / 熱性能
Temperature ratings vary based on insulation material, with XLPE providing the highest continuous operating temperature for demanding process environments:
| Insulation 絕緣 | Min. Ambient (Fixed) | Max. Ambient (Fixed) | Max. Conductor Temp | Application 應用 |
|---|---|---|---|---|
| PE | -15°C | +65°C | 70°C | Standard process control 標準過程控制 |
| PVC | -20°C | +65°C | 70°C | General industrial 一般工業 |
| XLPE | -40°C | +90°C | 90°C | High temperature environments 高溫環境 |
| LSZH | -20°C | +65°C | 70°C | Fire safety critical 防火安全關鍵 |
熱性能說明
溫度額定值根據絕緣材料而異，XLPE 提供最高的連續工作溫度（90°C），適用於要求苛刻的工藝環境。對於需要低溫安裝的應用（如冷藏設施），XLPE 絕緣可在 -40°C 環境溫度下保持柔性。LSZH 護套電纜推薦用於防火安全關鍵區域，如控制室和隧道。
7. Application Scenarios / 應用場景
BS5308/PAS5308 instrumentation cables are specifically designed for signal transmission in process control and measurement applications. As recognized by professional instrumentation cable industry resources, these cables are intrinsically suitable for communication and instrumentation applications in process industries, transmitting analog (4-20mA) and digital signals from sensors and transducers to control systems.
🏭 Primary Applications 主要應用
- Process Control 過程控制: Temperature, pressure, flow, level transmitters to DCS/PLC systems
- Petrochemical Plants 石化廠: Refinery instrumentation, gas processing facilities
- Power Generation 發電: Turbine monitoring, boiler control, SCADA systems
- Water Treatment 水處理: pH monitoring, flow measurement, pump control
- Chemical Plants 化工廠: Reactor monitoring, batch process control
- Manufacturing 製造業: Quality control sensors, automation systems
應用場景說明
BS5308/PAS5308 儀表電纜專為過程控制和測量應用中的信號傳輸而設計。正如專業儀表電纜行業資源所認可，這些電纜本質上適用於工藝行業的通信和儀表應用，將來自傳感器和變送器的模擬（4-20mA）和數字信號傳輸到控制系統。從石油化工到水處理，從發電到製造業，BS5308/PAS5308 電纜是關鍵儀表基礎設施的核心。
8. Cable Selection Guide / 電纜選擇指南
Selecting the appropriate BS5308/PAS5308 cable configuration depends on installation environment, mechanical protection requirements, and fire safety considerations:
| Environment 環境 | Recommended Type | Insulation 絕緣 | Screening 屏蔽 | Rationale 理由 |
|---|---|---|---|---|
| Indoor control room | Part 1 Type 1 | PE / XLPE | CAM | Unarmoured, basic EMI protection |
| Critical analog signals | Part 1 Type 1 | PE / XLPE | ICAM | Maximum noise immunity for 4-20mA |
| Outdoor / buried | Part 1 Type 2 | PE / XLPE | CAM/ICAM | SWA mechanical protection |
| Chemical plant | Part 1 Type 3 | PE | CAM/ICAM | Lead sheath for chemical resistance |
| General industrial indoor | Part 2 Type 1 | PVC | CAM/ICAM | Cost-effective, good flexibility |
| Industrial plant outdoor | Part 2 Type 2 | PVC | CAM/ICAM | SWA armoured, economical |
| Fire safety critical areas | Part 1 Type 1/2 | XLPE | CAM/ICAM | LSZH sheath for low smoke |
電纜選擇指南說明
選擇適當的 BS5308/PAS5308 電纜配置取決於安裝環境、機械保護要求和防火安全考量。對於室內控制室，無鎧裝第 1 部分類型 1 通常足夠。對於室外或埋地安裝，需要鋼絲鎧裝（SWA）的第 1 部分類型 2。對於防火安全關鍵區域，應選擇 LSZH 護套配置。
9. Core Identification & Colour Coding / 芯線識別與顏色編碼
BS5308/PAS5308 cables utilize two primary identification methods for core/pair recognition during installation and maintenance:
- Colour-Coded Pairs 彩色編碼對: Individual pairs identified by unique colour combinations according to BS5308 colour code chart
- Numbered Black/Blue Pairs 編號黑/藍對: Pairs with printed numerical identification on black and blue insulated cores
芯線識別說明
BS5308/PAS5308 電纜使用兩種主要識別方法進行芯線/對識別。彩色編碼對根據 BS5308 顏色代碼表以獨特的顏色組合識別各個對。編號黑/藍對在黑色和藍色絕緣芯線上印有數字識別。訂購時應指定顏色編碼方法。
10. Why Choose Anhui Feichun Special Cable / 為何選擇安徽飛純特種電纜
Anhui Feichun Special Cable Co., Ltd. (安徽飛純特種電纜有限公司) delivers premium quality BS5308/PAS5308 instrumentation cables with rigorous quality control and comprehensive testing. Our technical team has extensive experience with the design, manufacturing, and testing of instrumentation cables to BS5308, PAS5308, and BS EN 50288-7 standards, ensuring optimal performance in critical process control applications.
- Manufacturing Excellence 製造卓越: Advanced PE/PVC/XLPE/LSZH compounding for instrumentation-grade performance
- Quality Testing 品質測試: Comprehensive electrical and mechanical testing per BS5308/PAS5308
- Global Supply 全球供應: Export capability to process industry projects worldwide
- Full Range 完整系列: Part 1 (PE) and Part 2 (PVC) in all Type configurations
- Screening Options 屏蔽選項: CAM, ICAM, and custom screening configurations
- Custom Engineering 定制工程: Bespoke pair counts, conductor sizes, and material combinations
選擇飛純的理由
安徽飛純特種電纜有限公司提供符合 BS5308/PAS5308 標準的優質儀表電纜，實施嚴格的品質控制和全面測試。我們的技術團隊在 BS5308、PAS5308 和 BS EN 50288-7 標準儀表電纜的設計、製造和測試方面擁有豐富經驗，確保在關鍵過程控制應用中實現最佳性能。
References & Citations / 參考文獻與引用
- [1] BS5308/PAS5308 Instrumentation Cable Technical Specifications. Feichun Cable Industry Resources
- [2] PAS5308:2009 – Publicly Available Specification for instrumentation cables. BSI Group
- [3] BS EN 50288-7 – Multi-element metallic cables for analogue and digital communication. CENELEC Standards
- [4] IEC 60228 – Conductors of insulated cables. IEC Standards
- [5] 4-20mA Current Loop Signal Transmission Standards. ISA Standards
