Description
GE SR745-745W2P1G1HIARE 变压器管理继电器是一款高性能的变压器保护设备，其技术参数涵盖电气特性、保护功能、通信接口及环境适应性等方面。以下是该型号继电器的详细技术参数说明：
1. 电气特性
- 电源电压范围：
- 直流（DC）：90-300VDC
- 交流（AC）：70-265VAC，48-62Hz
- 功率消耗：根据具体配置和负载情况而定，通常设计为低功耗以适应长期运行需求。
- 输出容量：提供多个逻辑输出和继电器触点，具体数量和容量需参考产品手册。
2. 保护功能
- 差动保护：支持变压器比例式差动保护和差动速断保护。
- 谐波制动：自适应2次谐波和5次谐波制动，防止误动作。
- 过电流保护：每侧每相配备多个正序、负序、零序过电流元件。
- 接地保护：包括接地差动保护和限制性接地故障保护。
- 过励磁保护：监测变压器过励磁状态，防止绝缘损坏。
- 频率保护：低频/过频/频率变化率保护，适应电网频率波动。
- PT/CT断线闭锁：防止因电压互感器（PT）或电流互感器（CT）断线导致的误动作。
- 波形捕捉：可记录故障电流、涌流或报警时的电流波形，并保存最新40次事件。
3. 通信接口
- 串行通信：
- 1个RS232接口
- 2个RS485接口
- 网络通信：支持ModBus RTU、DNP 3.0等通信协议。
- 时间同步：支持IRIG-B信号接收，实现卫星GPS时间同步。
4. 环境适应性
- 工作温度：-40°F 至 +140°F（-40°C 至 +60°C）
- 存储温度：-40°F 至 +176°F（-40°C 至 +80°C）
- 相对湿度：高达90%（无冷凝）
- 海拔高度：最高2000米（超过需降容使用）
5. 机械与结构
- 安装方式：标准19英寸机架安装，符合IEEE、ANSI和NEMA标准。
- 防护等级：具备防尘、防潮设计，适用于恶劣环境。
- 显示与操作：配备40字符背光液晶显示屏和输入键盘，便于手动调整设定值。
6. 软件与配置
- 配置软件：通过EnerVista 745软件进行配置、维护和监控。
- 可编程逻辑：支持用户自定义保护逻辑和自动组态功能。
- 动态修正：可动态修正因变压器接线组别和抽头引起的CT变比不匹配。
7. 其他特性
- 测量精度：电压、电流、功率等测量精度高，满足电力系统监测需求。
- 可靠性：采用先进的电子技术和可靠的机械结构，确保高负载和恶劣环境下的稳定运行。
- 维护性：产品设计考虑维护便利性，减少清洁和维护工作量。
- The GE SR745-745W2P1G1HIARE Transformer Management Relay is a high-performance transformer protection device, with technical parameters covering electrical characteristics, protection functions, communication interfaces, and environmental adaptability. The following is a detailed technical specification of the relay model:
1. Electrical characteristics
Power supply voltage range:
Direct Current (DC): 90-300VDC
Communication (AC): 70-265VAC, 48-62Hz
Power consumption: Depending on specific configuration and load conditions, it is usually designed for low power consumption to meet long-term operational needs.
Output Capacity: Provides multiple logic outputs and relay contacts. Please refer to the product manual for specific quantities and capacities.
2. Protection function
Differential protection: Supports transformer proportional differential protection and differential quick break protection.
Harmonic braking: Adaptive 2nd harmonic and 5th harmonic braking to prevent misoperation.
Overcurrent protection: Multiple positive sequence, negative sequence, and zero sequence overcurrent components are equipped on each side and phase.
Grounding protection: including differential grounding protection and restrictive grounding fault protection.
Overexcitation protection: Monitor the overexcitation status of the transformer to prevent insulation damage.
Frequency protection: Low frequency/over frequency/frequency change rate protection, adapted to power grid frequency fluctuations.
PT/CT disconnection locking: prevents misoperation caused by voltage transformer (PT) or current transformer (CT) disconnection.
Waveform capture: It can record the current waveform of fault current, surge current or alarm, and save the latest 40 events.
3. Communication interface
Serial communication:
1 RS232 interface
2 RS485 interfaces
Network communication: Supports communication protocols such as ModBus RTU and DNP 3.0.
Time synchronization: Supports IRIG-B signal reception to achieve satellite GPS time synchronization.
4. Environmental adaptability
Working temperature:- 40 ° F to+140 ° F (-40 ° C to+60 ° C)
Storage temperature:- 40 ° F to+176 ° F (-40 ° C to+80 ° C)
Relative humidity: up to 90% (without condensation)
Altitude: up to 2000 meters (beyond which capacity reduction is required)
5. Machinery and Structure
Installation method: Standard 19 inch rack installation, compliant with IEEE, ANSI, and NEMA standards.
Protection level: Equipped with dust-proof and moisture-proof design, suitable for harsh environments.
Display and operation: Equipped with a 40 character backlit LCD display and input keyboard for easy manual adjustment of settings.
6. Software and Configuration
Configuration software: Use EnerVista 745 software for configuration, maintenance, and monitoring.
Programmable logic: supports user-defined protection logic and automatic configuration function.
Dynamic correction: It can dynamically correct CT ratio mismatch caused by transformer wiring group and tap.
7. Other characteristics
Measurement accuracy: High measurement accuracy for voltage, current, power, etc., meeting the monitoring requirements of the power system.
Reliability: Advanced electronic technology and reliable mechanical structure are adopted to ensure stable operation under high loads and harsh environments.
Maintainability: Product design considers maintenance convenience and reduces cleaning and maintenance workload.
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