| 保护功能 | 变压器保护 |
|---|---|
| 工作电源 | DC220V,AC220V,DC110V |
| 额定电流 | 5A,1A |
| 操作电源 | DC220V,AC220V,DC110V |
| 通信方式 | 串口RS485 |
YZ310-CB 厂用变保护测控装置
一、产品简介
YZ310-CB厂用变保护测控装置适用于10kV、6kV电压等级的厂用变压器，实现变压器的保护及测控功能。装置集保护、测量、控制、通讯于一体。
二、保护功能
电流速断保护（I段）
限时速断保护（II段）
定时限过流保护（III段）
反时限过流保护
零序过流保护
温度保护（高温告警、超温跳闸）
瓦斯保护（轻瓦斯告警、重瓦斯跳闸）
过负荷保护
PT断线告警
零序过压告警
控制回路断线告警
三、测控功能
Ia、Ib、Ic、I0交流量采集
Ua、Ub、Uc、Uab、Ubc、Uca交流量采集
P、Q、S、cosφ、f测量
遥信采集（12路开入）
遥控输出（5路开出）
事件记录（30条SOE）
RS485通讯（Modbus协议）
四、技术指标
| 参数 | 指标 |
| 额定电压 | AC 100V、100/√3 V |
| 额定电流 | AC 5A、1A |
| 额定频率 | 50Hz |
| 工作电源 | AC/DC 85V~265V |
| 功耗 | 电源回路 ≤20W；电流回路 ≤1.0VA/相(5A时)；电压回路 ≤0.5VA/相 |
| 过载能力（电流） | 2倍额定值连续；10倍额定值允许10s；40倍额定值允许1s |
| 过载能力（电压） | 1.2倍额定值连续；1.5倍额定值允许10s |
| 测量精度（电流/电压） | ≤0.5% |
| 测量精度（有功/无功功率） | ≤2.0% |
| 测量精度（频率） | ≤0.02Hz |
| 保护电流精度 | ≤3% |
| 保护时间精度 | ≤±30ms |
| 绝缘电阻 | ≥500MΩ（500V兆欧表） |
| 介质强度 | AC 2kV 1min（输入/输出/电源/外壳间） |
| 冲击电压 | 5kV标准雷电冲击波 |
| 工作环境温度 | -20°C ~ +70°C |
| 储存环境温度 | -40°C ~ +85°C |
| 大气压力 | 80kPa ~ 110kPa |
| 海拔高度 | ≤5000m |
| 通讯接口 | RS485 |
| 通讯协议 | Modbus-RTU |
| 通讯速率 | 9600bps（默认） |
| 开入数量 | 12路 |
| 开出数量 | 5路 |
| 事件记录 | 30条SOE |
| 模拟量采集 | 8路 |
YZ310-CB Station Service Transformer Protection & Control Device
I. Product Overview
The YZ310-CB station service transformer protection and control device is suitable for 10kV and 6kV station service transformers, providing transformer protection and measurement & control functions. The device integrates protection, measurement, control, and communication.
II. Protection Functions
Instantaneous overcurrent protection (Stage I)
Time-limited overcurrent protection (Stage II)
Definite time overcurrent protection (Stage III)
Inverse time overcurrent protection
Zero-sequence overcurrent protection
Temperature protection (high temperature alarm, over-temperature trip)
Gas protection (light gas alarm, heavy gas trip)
Overload protection
PT disconnection alarm
Zero-sequence overvoltage alarm
Control circuit disconnection alarm
III. Measurement & Control Functions
Ia, Ib, Ic, I0 AC analog acquisition
Ua, Ub, Uc, Uab, Ubc, Uca AC analog acquisition
P, Q, S, cosφ, f measurement
Remote signaling acquisition (12 digital inputs)
Remote control output (5 digital outputs)
Event recording (30 SOE events)
RS485 communication (Modbus protocol)
IV. Technical Specifications
| Parameter | Specification |
| Rated Voltage | AC 100V, 100/√3 V |
| Rated Current | AC 5A, 1A |
| Rated Frequency | 50Hz |
| Operating Power Supply | AC/DC 85V~265V |
| Power Consumption | Power circuit ≤20W; Current circuit ≤1.0VA/phase (at 5A); Voltage circuit ≤0.5VA/phase |
| Overload Capacity (Current) | 2x rated value continuously; 10x rated value for 10s; 40x rated value for 1s |
| Overload Capacity (Voltage) | 1.2x rated value continuously; 1.5x rated value for 10s |
| Measurement Accuracy (Current/Voltage) | ≤0.5% |
| Measurement Accuracy (Active/Reactive Power) | ≤2.0% |
| Measurement Accuracy (Frequency) | ≤0.02Hz |
| Protection Current Accuracy | ≤3% |
| Protection Time Accuracy | ≤±30ms |
| Insulation Resistance | ≥500MΩ (500V megohmmeter) |
| Dielectric Strength | AC 2kV 1min (between input/output/power supply/enclosure) |
| Impulse Voltage | 5kV standard lightning impulse |
| Operating Temperature | -20°C ~ +70°C |
| Storage Temperature | -40°C ~ +85°C |
| Atmospheric Pressure | 80kPa ~ 110kPa |
| Altitude | ≤5000m |
| Communication Interface | RS485 |
| Communication Protocol | Modbus-RTU |
| Communication Baud Rate | 9600bps (default) |
| Digital Input Channels | 12 channels |
| Digital Output Channels | 5 channels |
| Event Recording | 30 SOE events |
| Analog Input Channels | 8 channels |