WJ系列智能控制器

产品概述

WJ系列智能控制器是M-PACT框架式空气断路器的核心控制部件，主要应用于低压配电、馈电及发电回路，为线路和电气设备提供过载、短路、接地等故障保护，同时作为配电自动化终端实现遥测、遥信、遥控、遥调“四遥”功能。产品采用电源CT与辅助电源双供电方案，确保电网电压跌落时控制器仍可可靠工作，符合IEC947-2、IEC255、IEC61000、GB14048.1、GB14048.2等国内外标准，通过严苛等级电磁兼容试验。

产品型号与规格

型号分级

• WJ20：经济型，提供过载、短路、接地等基础保护功能。
• WJ30：普通型，在WJ20基础上新增4路DI和4路DO输入输出功能。
• WJ40：高级型，在WJ30基础上新增Modbus、Profibus-DP、DeviceNet多总线通讯功能。

DI输入版本

• L型：低电压版本，支持DC24~48V开关量输入。
• H型：高电压版本，支持DC110130V或AC110250V开关量输入。

电流规格

• Ⅰ框：400A、630A、800A、1000A、1250A、1600A、2000A、2500A
• Ⅱ框：800A、1000A、1250A、1600A、2000A、2500A、3200A、4000A

核心保护功能

三段式电流保护

• 过载长延时保护：支持BS142与IEC947-4两类保护曲线，包含标准反时限、快速反时限、特快反时限（通用/马达保护）、高压熔丝兼容等曲线类型；具备热记忆功能，冷却时间可灵活设定，可有效防止反复过载冲击；支持中相半定值/全定值保护模式。
• 短路短延时保护：分为反时限与定时限两种工作模式，可与上下级断路器实现保护选择性配合；冷态启动时动作时间不小于定时限设定值，热态启动不受定时限约束。
• 瞬时保护：包含MCR合闸接通保护与HSISC极限分断保护，故障电流信号直接通过硬件比较电路输出动作指令。MCR在合闸瞬间100ms内起作用，HSISC在运行全程生效，动作时间达毫秒级，用于保护断路器本体。

接地故障保护

提供三种接地保护模式，可单独选用或组合使用：

• UEF非限制性接地保护：为下级设备与电缆提供保护，检测断路器下端的接地故障。
• REF限制性接地保护：为上级主设备与电缆提供保护，检测断路器上端的接地故障，可向上级断路器输出联锁跳闸信号。
• SEF备用接地保护：作为UEF、REF的后备保护，检测系统全域接地故障，动作后可触发上级联锁跳闸。

电压与功率保护

具备欠压保护、过压保护、受电需量保护、发电需量保护，可独立设定动作阈值、延时时间与返回值，支持报警或跳闸两种执行方式。

其他保护功能

包含负载监控（过载预报警、负荷卸载与恢复）、相序报警、电流不平衡保护等功能，可根据现场运行需求灵活配置投退。

测量与计量功能

• 电参量测量：实时测量三相及中性相电流、相电压/线电压、系统频率、有功/无功/视在功率、功率因数，测量精度满足工业级要求。
• 需量测量：采用滑动窗口模式统计电流与功率需量，窗口时间5~60分钟可调，用于负荷管控与峰值预警。
• 电能计量：支持双向有功、无功、视在电能计量，可分别统计输入、输出电能。
• 电流峰值记录：自动记录各相历史最大电流，支持手动清零复位。

辅助与运维功能

• 事件记录：可存储16次故障跳闸记录，记录内容包含故障类型、故障电流、发生时间，数据掉电不丢失。
• 设备运维：自动统计断路器操作次数，评估触头磨损程度，达到寿命阈值时自动预警；支持设备自诊断，可实时监测芯片、采样、存储、通信、CT断线等内部状态。
• 区域选择性联锁（ZSI）：通过DI/DO信号实现上下级断路器联锁配合，短路/接地故障时下级断路器瞬时动作、上级断路器延时等待，既保障保护选择性，又缩小故障停电范围。
• 测试模式：配合专用检测单元可对全部保护功能进行全面测试，支持跳闸/不跳闸两种试验模式，具备强制脱扣校验功能。
• 参数记忆：支持外接PAMM参数记忆模块，更换控制器或断路器本体时无需重新输入保护定值。

通信能力

WJ40型支持Modbus、Profibus-DP、DeviceNet三种主流工业总线协议，可接入配电自动化系统实现“四遥”功能；通讯接口采用光电隔离设计，在强电磁环境下可稳定运行。

供电与环境参数

• 供电方式：支持电源CT自供电、辅助电源供电（DC24V/AC24V），两种方式可同时供电；接地保护、通讯、热记忆等功能必须配备辅助电源。
• 环境条件：工作温度-5℃+55℃，储存温度-25℃+85℃，污染等级3级，安装类别Ⅲ类；海拔超过2000m时，产品性能需按标准修正。
• 测量精度：电流在0.4In~2In范围内误差±4.5%；电压误差±1.5%；功率、电能误差±3.5%；频率误差±0.05%。

配套附件

可选配插入式便携电源盒、辅助电源单元、插入式便携检测单元、PAMM参数记忆模块等配套附件。

WJ Series Intelligent Controller

Product Overview

The WJ series intelligent controller is the core control unit of M-PACT air circuit breakers. It is mainly applied in low-voltage distribution, feeder and power generation circuits, providing protection against overload, short circuit, earth fault and other faults for lines and electrical equipment. As a terminal of distribution automation, it also realizes four remote functions: remote measurement, remote signaling, remote control and remote adjustment.

The product adopts a dual power supply scheme of power CT and auxiliary power, ensuring reliable operation even when the grid voltage drops. It complies with domestic and international standards including IEC947-2, IEC255, IEC61000, GB14048.1 and GB14048.2, and passes strict-grade electromagnetic compatibility tests.

Product Models and Specifications

Model Classification

• WJ20: Economic version, providing basic protection functions such as overload, short circuit and earth fault.
• WJ30: Standard version, adding 4 channels DI and 4 channels DO input/output functions based on WJ20.
• WJ40: Advanced version, adding multi-bus communication functions including Modbus, Profibus-DP and DeviceNet based on WJ30.

DI Input Versions

• Type L: Low voltage version, supporting DC24~48V digital input.
• Type H: High voltage version, supporting DC110130V or AC110250V digital input.

Current Ratings

• Frame Ⅰ: 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A
• Frame Ⅱ: 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3200A, 4000A

Core Protection Functions

Three-Stage Current Protection

• Long-time Overload Protection: Supports two types of protection curves: BS142 and IEC947-4, including standard inverse time, fast inverse time, extremely fast inverse time (general/motor protection) and high-voltage fuse compatible curves. With thermal memory function and configurable cooling time, it effectively prevents impact from repeated overload. It also supports half-rated or full-rated neutral phase protection modes.
• Short-time Short Circuit Protection: Divided into inverse time and definite time operation modes, realizing selective coordination with upstream and downstream circuit breakers. The action time is not less than the definite time setting when starting from cold state, and not restricted by the definite time in hot state.
• Instantaneous Protection: Includes MCR making current protection and HSISC ultimate breaking protection. Fault current signals output action instructions directly through the hardware comparison circuit. MCR acts within 100ms during closing, and HSISC is effective throughout operation, with millisecond-level action time to protect the breaker body.

Earth Fault Protection

Provides three earth fault protection modes, selectable singly or in combination:

• UEF (Unrestricted Earth Fault): Protects downstream equipment and cables by detecting earth faults at the lower end of the breaker.
• REF (Restricted Earth Fault): Protects upstream main equipment and cables by detecting earth faults at the upper end of the breaker, and can output interlock trip signals to the upstream breaker.
• SEF (Standby Earth Fault): Serves as backup protection for UEF and REF, detecting system-wide earth faults, and can trigger upstream interlock tripping after action.

Voltage and Power Protection

Equipped with under-voltage protection, over-voltage protection, incoming demand protection and generation demand protection. Action threshold, delay time and return value can be set independently, supporting two execution modes: alarm or trip.

Other Protection Functions

Including load monitoring (overload pre-alarm, load shedding and recovery), phase sequence alarm, current unbalance protection, etc., which can be flexibly enabled or disabled according to on-site operation requirements.

Measurement and Metering Functions

• Electrical Parameter Measurement: Real-time measurement of three-phase and neutral current, phase/line voltage, system frequency, active/reactive/apparent power and power factor, with industrial-grade measurement accuracy.
• Demand Measurement: Adopts sliding window mode to count current and power demand, with adjustable window time from 5 to 60 minutes, used for load control and peak warning.
• Energy Metering: Supports bidirectional active, reactive and apparent energy metering, with separate statistics of input and output energy.
• Current Peak Record: Automatically records the historical maximum current of each phase, supporting manual reset.

Auxiliary and Operation & Maintenance Functions

• Event Log: Stores up to 16 fault trip records, including fault type, fault current and occurrence time, with data retained after power failure.
• Equipment Operation & Maintenance: Automatically counts circuit breaker operation times and evaluates contact wear degree, giving automatic warning when reaching the life threshold. Supports equipment self-diagnosis, real-time monitoring of internal status such as chip, sampling, storage, communication and CT disconnection.
• Zone Selective Interlocking (ZSI): Realizes interlocking coordination between upstream and downstream circuit breakers through DI/DO signals. In case of short circuit/earth fault, the downstream breaker acts instantaneously while the upstream breaker waits with delay, ensuring protection selectivity and reducing the power outage scope.
• Test Mode: With a dedicated detection unit, all protection functions can be fully tested, supporting both trip and non-trip test modes, and equipped with forced trip verification function.
• Parameter Memory: Supports external PAMM parameter memory module, no need to re-input protection settings when replacing the controller or breaker body.

Communication Capability

The WJ40 supports three mainstream industrial bus protocols: Modbus, Profibus-DP and DeviceNet. It can be connected to the distribution automation system to realize the "four remote" functions. The communication interface adopts photoelectric isolation design for stable operation in strong electromagnetic environment.

Power Supply and Environmental Parameters

• Power Supply Modes: Supports power CT self-power supply and auxiliary power supply (DC24V/AC24V), which can be used simultaneously. Auxiliary power is required for functions such as earth fault protection, communication and thermal memory.
• Environmental Conditions: Operating temperature -5℃+55℃, storage temperature -25℃+85℃, pollution degree 3, installation category Ⅲ. When the altitude exceeds 2000m, product performance shall be corrected according to standards.
• Measurement Accuracy: Current error ±4.5% within 0.4In~2In; voltage error ±1.5%; power and energy error ±3.5%; frequency error ±0.05%.

Supporting Accessories

Optional accessories include plug-in portable power box, auxiliary power unit, plug-in portable detection unit, PAMM parameter memory module, etc.