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RN1/RN2/RN3/RN4 Indoor High Voltage Current-Limiting Fuse 6KV 10KV 24KV 35KV for Transformer & PT Protection
Short Description:
RN1/RN2/RN3/RN4 Series Indoor High Voltage Current-Limiting Fuses are suitable for 6KV, 10KV, 24KV, 35KV AC power systems. Divided into general protection type (RN1/RN3) and PT dedicated protection type (RN2/RN4) according to usage, with rated current ranging from 0.5A to 300A. Adopting porcelain fuse tube + quartz sand arc-extinguishing structure, it has strong current-limiting capability, fast fusing during short circuit, limiting current peak, overvoltage ≤2.5 times, no re-ignition and no explosion risk. Fully enclosed design, moisture-proof and dust-proof, indoor base-mounted installation, easy maintenance, compliant with GB/T 15166.3 and IEC 60282 international standards, widely used for short-circuit and overload protection of substations, switchgears, transformers, voltage transformers and other equipment.
在户内高压配电系统中，短路与过载是威胁设备安全、导致供电中断的主要隐患，不同设备（变压器、线路、电压互感器）对保护装置的电流、精度要求差异较大。RN1/RN2/RN3/RN4 系列高压限流熔断器，针对性解决不同场景的保护需求，一体化全封闭设计，兼顾安全性与实用性，核心优势如下：
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全系列适配，用途细分精准：RN1为通用型，适配线路、变压器、电容器保护，额定电流2A-200A；RN2/RN4为PT专用型，固定0.5A（部分RN4可选0.35A），专为电压互感器一次侧保护设计；RN3为重载大电流型，额定电流5A-300A，适配大型变压器、电机等重载设备保护。
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强限流+高效灭弧，保护更可靠：内置石英砂灭弧介质，短路时快速熄灭电弧，限流效果显著，可有效限制短路电流峰值，避免设备烧毁、越级跳闸；过电压控制在2.5倍以内，无重燃现象，保护系统绝缘不受损伤。
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全封闭瓷质结构，耐候性强：采用高强度瓷质熔管，全封闭设计，有效隔绝灰尘、潮气、异物，适配户内潮湿、多粉尘等复杂环境；工作温度范围-40℃~+40℃，海拔≤1000m，长期运行免维护，使用寿命长。
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安装便捷，适配性广：户内底座式安装，结构紧凑，占地空间小，可直接嵌入开关柜、PT柜、变电站设备中；适配6KV、10KV、24KV、35KV全电压等级，满足城农网改造、工业园区、矿山、电站等多场景使用需求。
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安全合规，全球适配：严格遵循GB/T 15166.3、IEC 60282国际标准，通过全项型式试验，耐压、开断、限流性能均达标，可直接出口全球，适配不同国家电力系统标准。
应用场景：户内开关柜、变电站、配电变压器高压侧、电压互感器（PT）一次侧、电力线路、电容器组、大型电机保护，广泛用于城农网改造、工业园区、矿山、光伏电站、风电场等高压配电系统。
In indoor high-voltage distribution systems, short circuits and overloads are the main hidden dangers threatening equipment safety and causing power outages. Different equipment (transformers, lines, voltage transformers) have different requirements for the current and precision of protection devices. RN1/RN2/RN3/RN4 Series High Voltage Current-Limiting Fuses specifically solve the protection needs of different scenarios, with an integrated fully enclosed design that balances safety and practicality. Core advantages are as follows:
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Full series adaptation, precise usage division: RN1 is a general type, suitable for line, transformer and capacitor protection, with rated current 2A-200A; RN2/RN4 are PT dedicated types, fixed 0.5A (some RN4 optional 0.35A), specially designed for primary side protection of voltage transformers; RN3 is a heavy-duty high-current type, rated current 5A-300A, suitable for protection of large transformers, motors and other heavy-duty equipment.
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Strong current-limiting + efficient arc-extinguishing, more reliable protection: Built-in quartz sand arc-extinguishing medium, quickly extinguishes arc during short circuit, with significant current-limiting effect, which can effectively limit the peak short-circuit current, avoid equipment burnout and over-level tripping; overvoltage is controlled within 2.5 times, no re-ignition, protecting the system insulation from damage.
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Fully enclosed porcelain structure, strong weather resistance: Adopting high-strength porcelain fuse tube, fully enclosed design, effectively isolating dust, moisture and foreign objects, suitable for complex indoor environments such as humidity and high dust; operating temperature range -40℃~+40℃, altitude ≤1000m, maintenance-free for long-term operation, long service life.
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Easy installation, wide adaptability: Indoor base-mounted installation, compact structure, small footprint, can be directly embedded in switchgears, PT cabinets, substation equipment; compatible with 6KV, 10KV, 24KV, 35KV full voltage levels, meeting the needs of urban and rural grid renovation, industrial parks, mines, power stations and other multi-scenario applications.
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Safety and compliance, global adaptation: Strictly follow GB/T 15166.3 and IEC 60282 international standards, pass all type tests, with qualified voltage withstand, breaking and current-limiting performance, can be directly exported to the world, adapting to power system standards of different countries.
Application Scenarios: Indoor switchgears, substations, high-voltage side of distribution transformers, primary side of voltage transformers (PT), power lines, capacitor banks, large motor protection, widely used in high-voltage distribution systems such as urban and rural grid renovation, industrial parks, mines, solar power stations and wind farms.
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中文参数项
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RN1（通用型）
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RN2（PT专用）
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RN3（重载型）
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RN4（PT专用）
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English Parameter
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RN1 (General Type)
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RN2 (PT Dedicated)
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RN3 (Heavy-Duty Type)
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RN4 (PT Dedicated)
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产品型号
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RN1-6/2-200A、RN1-10/2-200A、RN1-35/7.5-100A
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RN2-6/0.5A、RN2-10/0.5A、RN2-35/0.5A
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RN3-10/5-300A、RN3-35/10-150A
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RN4-6/0.5A、RN4-10/0.5A、RN4-35/0.5A（可选0.35A）
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Product Model
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RN1-6/2-200A, RN1-10/2-200A, RN1-35/7.5-100A
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RN2-6/0.5A, RN2-10/0.5A, RN2-35/0.5A
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RN3-10/5-300A, RN3-35/10-150A
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RN4-6/0.5A, RN4-10/0.5A, RN4-35/0.5A (0.35A Optional)
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额定电压
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6KV、10KV、24KV、35KV
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6KV、10KV、35KV
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10KV、35KV
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6KV、10KV、35KV
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Rated Voltage
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6KV, 10KV, 24KV, 35KV
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6KV, 10KV, 35KV
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10KV, 35KV
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6KV, 10KV, 35KV
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额定电流
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2A-200A
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0.5A（固定）
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5A-300A
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0.35A、0.5A
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Rated Current
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2A-200A
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0.5A (Fixed)
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5A-300A
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0.35A, 0.5A
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断流容量
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1000MVA
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1000MVA
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1500MVA
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1000MVA
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Breaking Capacity
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1000MVA
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1000MVA
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1500MVA
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1000MVA
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额定短路开断电流
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12-50kA
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17-50kA
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15-40kA
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17-50kA
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Rated Short-Circuit Breaking Current
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12-50kA
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17-50kA
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15-40kA
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17-50kA
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限流过电压倍数
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≤2.5倍
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≤2.5倍
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≤2.5倍
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≤2.5倍
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Current-Limiting Overvoltage Multiple
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≤2.5 times
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≤2.5 times
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≤2.5 times
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≤2.5 times
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1min工频耐受电压
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6KV:32KV；10KV:42KV；35KV:105KV
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6KV:32KV；10KV:42KV；35KV:105KV
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10KV:42KV；35KV:105KV
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6KV:32KV；10KV:42KV；35KV:105KV
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1min Power Frequency Withstand Voltage
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6KV:32KV; 10KV:42KV; 35KV:105KV
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6KV:32KV; 10KV:42KV; 35KV:105KV
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10KV:42KV; 35KV:105KV
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6KV:32KV; 10KV:42KV; 35KV:105KV
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雷电冲击耐受电压（峰值）
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6KV:75KV；10KV:75KV；35KV:185KV
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6KV:75KV；10KV:75KV；35KV:185KV
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10KV:75KV；35KV:185KV
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6KV:75KV；10KV:75KV；35KV:185KV
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Lightning Impulse Withstand Voltage (Peak)
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6KV:75KV; 10KV:75KV; 35KV:185KV
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6KV:75KV; 10KV:75KV; 35KV:185KV
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10KV:75KV; 35KV:185KV
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6KV:75KV; 10KV:75KV; 35KV:185KV
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绝缘材质
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瓷质
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瓷质
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瓷质
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瓷质
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Insulation Material
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Porcelain
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Porcelain
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Porcelain
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Porcelain
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环境温度
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-40℃~+40℃
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-40℃~+40℃
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-40℃~+40℃
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-40℃~+40℃
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Ambient Temperature
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-40℃~+40℃
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-40℃~+40℃
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-40℃~+40℃
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-40℃~+40℃
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适用海拔
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≤1000m
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≤1000m
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≤1000m
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≤1000m
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Applicable Altitude
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≤1000m
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≤1000m
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≤1000m
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≤1000m
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执行标准
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GB/T 15166.3、IEC 60282
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GB/T 15166.3、IEC 60282
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GB/T 15166.3、IEC 60282
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GB/T 15166.3、IEC 60282
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Compliance Standards
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GB/T 15166.3, IEC 60282
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GB/T 15166.3, IEC 60282
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GB/T 15166.3, IEC 60282
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GB/T 15166.3, IEC 60282
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用途
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线路、变压器、电容器保护
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电压互感器（PT）保护
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大型变压器、电机、重载线路保护
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电压互感器（PT）保护
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Application
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Line, Transformer, Capacitor Protection
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Voltage Transformer (PT) Protection
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Large Transformer, Motor, Heavy-Duty Line Protection
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Voltage Transformer (PT) Protection
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