产品概述 Product Overview

NHXLC 耐火密集型母线槽除在电气性能上有绝缘母线槽之有点外，更具有的防火性能，其导电材料选用导电铜排，绝缘采用云母及高强陶瓷材料，母线外壳采用双层隔热器。内外采用防火材料处理。该母线槽能在周围环境温升到960℃时连续工作不低于90 分钟。具备无毒、无污染及在灭火时能防止水渗透的性能。

NHXLC Fire-Resistant Compact Busway not only retains the electrical advantages of insulated busways, but also features unique fire-resistant properties. It utilizes high-quality copper busbars as conductive material, insulated with mica and high-strength ceramic materials. The busway enclosure employs a dual-layer thermal barrier, with both internal and external components treated with fire-resistant materials. This busway can maintain continuous operation for no less than 90 minutes when the ambient temperature reaches 960° C. It possesses non-toxic and pollution-free characteristics, while also preventing water penetration during firefighting operations.

结构特点 Structural characteristics

● 拥有与"XLC 系列" 相同的" 三明治" 相线紧密叠压结构设计，母线槽外形紧凑、体积小，母线系统具有阻抗低、电压降低、动热稳定性好的优点，无发生火灾时“烟囱效应”形成的可能。

● 外壳采用冷拉成型薄钢型材混合组成。其两边侧板为我公司独创的双层中空结构。通过密闭中空游戏阻止高温其他或者明火直接进入母线内部。母线外壳表面为镀锌加喷防火涂料( 遇火时，涂料能迅速以几何速度在母线表面膨胀形成致密的碳化隔热层。密闭母线外壳缝隙。防止高温直接进入母线内部)。

● 接头采用专用耐火型绝缘组件，连接可靠方便。

◎ 绝缘配置

● NHXLC 系列母线耐火绝缘介质主要采用绝缘支撑选用氧化铝高温陶瓷件，可耐高温达1000℃母线铜导体绝缘采用聚酰亚胺和耐高温粉云母带混合缠绕( 聚酰亚胺俗称黄金带，是电工行业的绝缘材料，具有较好的耐高温和介电性能，介电强度≥ 22000V, 在高温中无有毒气体释出；粉云母带耐火温度高达960-1000℃ /1.5 小时，参照IEC371-3-8、GBI2666.6 耐火特性试验达到A 类要求）。

● Inherits the same "sandwich" compact laminated phase conductor structure as the "XLC Series", resulting in a compact busway profile with minimal footprint. The system delivers low impedance, reduced voltage drop, and excellent dynamic/thermal stability, while eliminating any risk of "chimney effect" during fire events.

● The enclosure is constructed from cold-formed thin-wall steel profiles. Its side panels feature our proprietary double-layer hollow structure, which utilizes sealed cavities to block hightemperature gases or direct flames from penetrating the busway interior. The surface receives galvanization plus fire-resistant coating (when exposed to fire, this coating expands at exponential rates to form a dense carbonized insulation layer, sealing all enclosure gaps against heat penetration).

● Joints incorporate dedicated fire-resistant insulation assemblies for reliable and convenient connections.

◎ Insulation Configuration

● NHXLC Series Busway Fire-Resistant Insulation System utilizes alumina high-temperature ceramic components for insulation support, capable of withstanding temperatures up to 1000 ° C. The copper busbar conductors are insulated with a composite wrapping of polyimide (commonly known as "gold tape") and high-temperature mica tape. Polyimide, recognized as the most advanced insulation material in the electrical industry, offers excellent high-temperature resistance and dielectric properties with a dielectric strength ≥ 22,000V and no toxic gas emissions under extreme heat. The mica tape withstands 960-1000 ° C for 1.5 hours, meeting Class A fire resistance requirements per IEC 60331-3-8 and GB 12666.6 standards.

产品特点 Product Features

● 耐水性能：采用高性能的绝缘树脂浇筑而成，具有优良的气密性和水密性，防护等级达IP68。IP68 是级别的防护等级，能防止灰尘的进入，并且能在连续浸水的情况下也能长期可靠运行。

● 耐火性能：绝缘树脂为自熄性绝缘材料，耐火性为A 级，防火等级为F120；可在950-1000℃的火焰中工作90min 以上，保持线路不中断，而且绝缘树脂不含卤素，高温时不会释放有害气体。

● 耐腐蚀性能：金属外壳的母线槽不能防酸雨腐蚀，化工厂产生的腐蚀性气体，甚至有腐蚀性的液体会溅落到电气产品上。这就要求母线有抗腐蚀性能。浇注母线槽的环氧树脂浇注料具有优良的防腐性能，能有效抵抗各种化学品的侵蚀。

● Water Resistance Performance: Encapsulated with high-performance insulating resin, the system demonstrates exceptional airtightness and watertightness, achieving IP68 protection rating - the highest level that prevents dust ingress and ensures long-term reliable operation even during continuous submersion.

● Fire Resistance Performance: The self-extinguishing insulating resin material achieves Class A fire resistance with F120 fire rating, maintaining circuit integrity for over 90 minutes in 950-1000° C flames. Being halogen-free, it releases no toxic fumes under hightemperature conditions.

● Corrosion Resistance Performance: Unlike metal-enclosed busways vulnerable to acid rain corrosion, the cast epoxy resin formulation provides superior chemical resistance, effectively withstanding corrosive gases from chemical plants and splash exposure to corrosive liquids.

适用范围 Scope of application

NHXLC 型耐火母线槽适用于额定电压690V 以下，额定工作电流250A-6300A、频率50-60Hz 的输配电系统。该系列母线是在NHXLC 母线基础上，结合国内实际情况设计的耐火母线。经过多年的试验、试生产和工业试运行，其电气性、耐火性、金属结构性均达到了国内高水平。

NHXLC Fire-Resistant Busway is designed for power distribution systems with rated voltage up to 690V, rated operating current from 250A to 6300A, and frequency of 50-60Hz. Developed based on the NHXLC busway platform and adapted to domestic conditions, this series represents a new generation of fire-resistant busways. Through years of testing, trial production, and industrial trial operations, its electrical performance, fire resistance, and structural integrity have achieved technologically advanced levels by domestic standards.

技术参数 Technical Parameter

耐火母线现场图 On Site Diagram of Fire-resistant Busbar