描述
一、产品定位与核心功能
UNS0868A是Tmax XT系列断路器的电子式脱扣器，替代传统热磁式脱扣器，通过微处理器实现以下功能：
三段式保护：长延时（Ir）、短延时（Isd）、瞬时（Ii）保护，适应不同负载特性（如电机、照明、变频器）。
智能化监控：实时测量电流、电压、功率、电能等参数，支持故障记录与事件日志。
通信与远程控制：可选配通信模块（如Modbus-RTU、Profibus-DP），集成至SCADA/DCS系统，实现远程分合闸与参数调整。
区域选择性联锁（ZSI）：与上下游断路器协同动作，缩小停电范围，提升系统可靠性。
二、关键技术参数
参数描述
适用断路器型号ABB Tmax XT系列塑壳断路器（如UNS0868A配套UN8-3200R等框架断路器）
额定电流范围（In）依断路器框架而定（如UN8系列支持630A-3200A，UNS0868A可适配其中部分规格）
保护功能-长延时（Ir）：0.4-1×In可调，时间延迟可设（如反时限、定时限）
-短延时（Isd）：1.5-10×In可调，时间延迟0.05-0.5s
-瞬时（Ii）：2-15×In可调，响应时间<10ms
测量功能实时监测三相电流、电压、功率因数、有功/无功功率、电能消耗（kWh）
通信接口标配RS485（Modbus-RTU），可选Profibus-DP、DeviceNet、以太网（需额外模块）
显示与操作本地LED显示屏或液晶屏（依型号），支持按键设置参数与查看事件日志
环境适应性工作温度：-25°C至+70°C（存储）；-5°C至+55°C（运行）；防护等级IP40（标准）
认证标准IEC 60947-2、GB 14048.2、CCC、CE、UL等
I.Product Positioning and Core Functions
The UNS0868A is an electronic trip unit for the Tmax XT series circuit breakers,replacing traditional thermal-magnetic trip units.It utilizes a microprocessor to implement the following functions:
Three-stage protection:long-delay(Ir),short-delay(Isd),and instantaneous(Ii)protection,adapting to different load characteristics(such as motors,lighting,and inverters).
Intelligent Monitoring:Real-time measurement of current,voltage,power,and energy,along with fault recording and event logging.
Communication and Remote Control:Optional communication modules(such as Modbus-RTU and Profibus-DP)enable integration into SCADA/DCS systems,enabling remote tripping and parameter adjustment.
Zone Selective Interlocking(ZSI):Coordinates with upstream and downstream circuit breakers to minimize power outages and improve system reliability.II.Key Technical Parameters
Parameter Description
Applicable Circuit Breaker Models:ABB Tmax XT Series Molded Case Circuit Breakers(e.g.,UNS0868A compatible with UN8-3200R and other frame-mounted circuit breakers).
Rated Current Range(In):Depends on the circuit breaker frame(e.g.,the UN8 series supports 630A-3200A,while the UNS0868A is compatible with some of these specifications).
Protection Functions:-Long Delay(Ir):Adjustable from 0.4 to 1×In,with programmable time delay(e.g.,inverse time or definite time).
-Short Delay(Isd):Adjustable from 1.5 to 10×In,with a time delay of 0.05 to 0.5 s.
-Instantaneous(Ii):Adjustable from 2 to 15×In,with a response time of<10 ms.
Measurement Functions:Real-time monitoring of three-phase current,voltage,power factor,active/reactive power,and energy consumption(kWh).
Communication Interface Standard RS485(Modbus-RTU);optional Profibus-DP,DeviceNet,and Ethernet(requires additional modules).
Display and Operation:Local LED display or LCD(depending on model),with keypad support for parameter setting and event log viewing.
Environmental Adaptability:Operating Temperature:-25°C to+70°C(Storage);-5°C to+55°C(Operation);IP40(Standard).
Certifications:IEC 60947-2,GB 14048.2,CCC,CE,UL,etc.
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
