描述
ABB 07KT97H3产品详情
ABB 07KT97H3是ABB集团推出的一款高性能工业级热继电器（Thermal Overload Relay），属于ABB Tmax/Tmax XT系列低压配电保护设备的配套组件。该产品专为三相异步电动机、变频器负载、压缩机等设备的过载保护与断相监测设计，具备高精度温度补偿、宽电流调节范围、快速脱扣特性，符合IEC 60947-4-1、GB 14048.4等国际/国内标准，广泛应用于电力、冶金、石化、建筑等行业的电动机控制中心（MCC）。
一、产品定位与核心功能
1.目标应用场景
电动机保护：
三相异步电机：防止长期过载、堵转、断相导致的绕组烧毁，延长电机使用寿命。
变频器负载：与变频器输出端配合，监测电机电流异常，避免变频器IGBT模块损坏。
工业设备控制：
压缩机、泵、风机：保护关键设备在启动冲击、负载突变时的安全运行。
自动化生产线：集成到PLC控制回路，实现电动机状态监测与故障预警。
2.核心功能
过载保护：
通过双金属片热效应检测电机电流，当电流超过设定值时，双金属片弯曲触发脱扣机构，切断接触器线圈回路。
反时限特性：过载倍数越大，脱扣时间越短（如1.2倍额定电流时20分钟脱扣，6倍时5秒内脱扣）。
断相保护：
监测三相电流平衡，当任一相电流缺失（断相）时，热继电器立即脱扣，防止电机单相运行烧毁。
温度补偿：
内置温度补偿元件，自动调整脱扣特性，适应环境温度变化（-20℃~+60℃），确保保护精度。
二、技术规格与性能参数
1.电气参数
额定电流范围：
调节范围****：0.1A~630A（分多个型号，07KT97H3覆盖特定电流段，需根据电机额定电流选型）。
整定电流：通过旋钮或拨码开关调节，步进值0.1A~10A（小电流段）或10A~50A（大电流段）。
脱扣特性：
冷态启动：允许5~7倍额定电流的短时冲击电流（如电机直接启动）。
热态保护：持续过载时，按IEC 60947-4-1标准曲线脱扣，避免误动作。
辅助触点：
1组常开（NO）+1组常闭（NC）触点，用于信号反馈或控制回路切换。
触点容量****：AC 250V/5A或DC 30V/2A，兼容PLC、指示灯、报警器等负载。
2.机械参数
外壳材质：
阻燃PC+ABS合金，符合UL94 V-0防火标准，确保电气安全。
安装方式：
导轨安装：支持35mm DIN导轨，可快速集成到电动机控制柜中。
面板安装：提供安装孔位，适用于嵌入式安装到设备面板。
防护等级：
IP20（基础版），防尘防水，适应室内环境；可选IP65防护罩用于室外或潮湿场景。
3.环境适应性
工作温度：-20℃~+60℃（常规型），-40℃~+70℃（宽温型可选）。
存储温度：-40℃~+85℃，确保运输与长期存储时的可靠性。
湿度范围****：5%~95%RH（无凝露），适应高湿度环境（如造纸、纺织行业）。
ABB 07KT97H3 Product Details
The ABB 07KT97H3 is a high-performance industrial-grade thermal overload relay(TWR)launched by ABB.It is a component of the ABB Tmax/Tmax XT series of low-voltage power distribution protection devices.Designed for overload protection and phase failure monitoring of three-phase asynchronous motors,inverter loads,compressors,and other equipment,it features high-precision temperature compensation,a wide current adjustment range,and fast tripping.Complying with international and domestic standards such as IEC 60947-4-1 and GB 14048.4,it is widely used in motor control centers(MCCs)in industries such as power,metallurgy,petrochemicals,and construction.
I.Product Positioning and Core Functions
1.Target Application Scenarios
Motor Protection:
Three-phase asynchronous motors:Prevent winding burnout caused by long-term overload,stall,and phase failure,thereby extending motor service life.Inverter Load:Works with the inverter output to monitor abnormal motor current and prevent damage to the inverter’s IGBT module.
Industrial Equipment Control:
Compressors,pumps,and fans:Protect critical equipment from startup shock and sudden load changes.
Automated Production Lines:Integrated into the PLC control loop to provide motor status monitoring and fault warnings.
2.Core Functions
Overload Protection:
The motor current is detected through the thermal effect of a bimetallic strip.When the current exceeds the set value,the bimetallic strip bends,triggering the trip mechanism and disconnecting the contactor coil circuit.
Inverse Time Protection:The greater the overload ratio,the shorter the trip time(e.g.,20 minutes for 1.2 times the rated current,and 5 seconds for 6 times).
Phase Failure Protection:
Monitors the three-phase current balance.If any phase current is lost(phase failure),the thermal relay immediately trips,preventing the motor from burning out due to single-phase operation.Temperature Compensation:
A built-in temperature compensation element automatically adjusts the tripping characteristics to adapt to ambient temperature fluctuations(-20°C to+60°C),ensuring protection accuracy.
II.Technical Specifications and Performance Parameters
1.Electrical Parameters
Rated Current Range:
Adjustable range****:0.1A to 630A(available in multiple models;the 07KT97H3 covers specific current ranges;select the model based on the motor’s rated current).
Set Current:Adjustable via knob or DIP switch,with steps of 0.1A to 10A(low current range)or 10A to 50A(high current range).
Tripping Characteristics:
Cold Start:Allows short-term inrush currents of 5 to 7 times the rated current(e.g.,motor direct start).
Hot Start:In the event of a continuous overload,tripping occurs according to the IEC 60947-4-1 standard curve to prevent nuisance operation.Auxiliary Contacts:
One normally open(NO)and one normally closed(NC)contact for signal feedback or control circuit switching.
Contact Rating****:AC 250V/5A or DC 30V/2A,compatible with loads such as PLCs,indicator lights,and alarms.
2.Mechanical Parameters
Casing Material:
Flame-retardant PC+ABS alloy,meeting UL94 V-0 fire protection standards,ensuring electrical safety.
Mounting Method:
Din-rail mounting:Supports 35mm DIN rails for quick integration into motor control cabinets.
Panel mounting:Provides mounting holes for flush-mounting on equipment panels.
Protection Rating:
IP20(basic version),dustproof and waterproof,suitable for indoor environments;optional IP65 protective cover for outdoor or humid environments.
3.Environmental Adaptability
Operating Temperature:-20°C to+60°C(standard version),-40°C to+70°C(wide-temperature version available).Storage temperature:-40°C to+85°C,ensuring reliability during transportation and long-term storage.
Humidity range****:5%to 95%RH(non-condensing),suitable for high-humidity environments(such as the papermaking and textile industries).
ABB Model: GBU72 3BHE055094R0002 Model: 3BHE055094R0002 GBU72 Model: GBU72 Model: 3BHE055094R0002 Model: 3BHE031197R0001 Model: 3BHB030310R0001 Model: 73BHE055094R0002 GBU72 Model: 73BHE055094R0002 Model: GBU72 Model: ABB PCS6000 PRODUCT FAMLIY ABB 5SHY4045L0006 3BHB030310R0001 3BHE039203R0101 GVC736CE101
