GE SR745-W2-P1-G1-HI-A-L-R

Description

Detailed Parameter Table

GE SR745-W2-P1-G1-HI-A-L-R

Product Introduction

The GE SR745-W2-P1-G1-HI-A-L-R is a reliable transformer protection relay from GE’s SR745 series, serving as a practical solution for transformer protection in various power systems. It is designed to detect common electrical faults and abnormal conditions, ensuring the stable operation of transformers. Compared to the SR745-W2-P1-G1-HI-A-L-R-E, it offers a more streamlined set of features, making it suitable for applications where advanced functions are not essential, while still providing core protection capabilities.

Core Advantages and Technical Highlights

Essential Protection Functions: This relay is equipped with key protection features necessary for transformer safety. Overcurrent protection guards against excessive current due to short circuits or overloads, overvoltage and undervoltage protection prevent damage from voltage fluctuations, differential protection detects internal transformer faults by comparing incoming and outgoing currents, and frequency protection monitors power system frequency deviations. For example, in a medium-sized industrial substation, if a short circuit occurs in the transformer’s primary winding, the overcurrent protection will quickly act to isolate the fault, preventing further damage.

Cost-Effective Solution: By omitting some advanced features of the -E model, the SR745-W2-P1-G1-HI-A-L-R offers a more economical option for users with basic protection needs. It maintains the core protection functions required for transformer operation, making it a cost-effective choice for small to medium-sized power systems or applications where budget constraints are a consideration. In a rural power distribution network with limited funds, this relay can provide adequate protection for transformers without incurring the additional cost of unnecessary advanced features.

Reliable Basic Communication: Equipped with RS232 and RS485 communication interfaces supporting basic protocols, the relay enables essential data transmission and remote monitoring. It can connect to simple monitoring systems, allowing operators to access basic transformer parameters and fault information. In a local distribution substation, this communication capability allows technicians to monitor the transformer’s status from a nearby control room, facilitating timely maintenance and troubleshooting.

Durable and Adaptable Design: With an operating temperature range of – 40°C to + 85°C, the relay can withstand harsh environmental conditions, ensuring reliable operation in various industrial and outdoor settings. Its standard 19 – inch panel mounting design allows for easy installation in control cabinets, integrating seamlessly into existing power system setups. In a desert power station with extreme temperature variations, the relay’s robust design ensures it continues to function properly, protecting the transformers.

Typical Application Scenarios

Rural Power Distribution Networks: In rural areas, where power systems are relatively simple and budget is limited, the SR745-W2-P1-G1-HI-A-L-R is an ideal choice for protecting distribution transformers. It guards against common faults such as overcurrent from agricultural machinery operation and voltage fluctuations due to unstable power supply. For example, in a village with a small transformer powering homes and farms, the relay detects overcurrent caused by a malfunctioning irrigation pump and trips the circuit, preventing damage to the transformer.

Small Industrial Facilities: Small factories or workshops with basic power requirements can benefit from this relay. It protects the transformers supplying power to machinery and equipment, ensuring continuous production. In a small textile factory, the relay detects overvoltage due to a power grid disturbance and takes action to protect the transformer, preventing disruptions to the production line.

Local Substations: Local substations that distribute power to residential areas and small commercial buildings can use the SR745-W2-P1-G1-HI-A-L-R to protect their transformers. It provides essential protection against faults, ensuring a stable power supply to end-users. In a suburban substation, the relay monitors the transformer’s operation, detecting undervoltage conditions and alerting operators to take corrective action, maintaining reliable power for homes and small businesses.

GE SR745-W2-P1-G1-HI-A-L-R

Related Model Recommendations

GE SR745-W2-P1-G1-HI-A-L-R-E: As the advanced version, it offers more comprehensive protection features, higher measurement accuracy, and enhanced communication capabilities. When upgrading a power system or in applications requiring advanced monitoring and protection, the -E model can be used alongside the SR745-W2-P1-G1-HI-A-L-R to provide a more robust solution. For example, in a growing industrial park, some transformers with basic needs can use the SR745-W2-P1-G1-HI-A-L-R, while critical transformers use the -E model for enhanced protection.

GE Basic Communication Gateway: This gateway can enhance the communication capabilities of the SR745-W2-P1-G1-HI-A-L-R, enabling it to connect to more complex monitoring systems. It converts basic protocols to more advanced ones, allowing for centralized data management. In a regional power distribution center, the gateway helps integrate data from multiple SR745-W2-P1-G1-HI-A-L-R relays into a single monitoring platform, improving operational efficiency.

GE Standard Test Equipment: To ensure the accuracy and reliability of the SR745-W2-P1-G1-HI-A-L-R, standard test equipment can be used for periodic calibration and testing. This equipment helps verify the relay’s protection functions and measurement accuracy, ensuring it operates correctly when needed. In a maintenance workshop, technicians use this test equipment to check the relay’s performance during routine maintenance, ensuring it is ready to protect the transformers.

Installation, Commissioning and Maintenance Instructions

Installation Preparation: Before installing the SR745-W2-P1-G1-HI-A-L-R, disconnect the power supply to the transformer and related circuits. Ensure the installation location is clean, dry, and free from excessive vibration and electromagnetic interference. Check that the control power supply voltage is within the HI range (90 – 300 VDC / 70 – 265 VAC at 48 – 62 Hz). Mount the relay on a standard 19 – inch panel using the provided hardware, leaving sufficient clearance for ventilation and maintenance.

Commissioning: After installation, connect the current and voltage transformers to the relay’s input terminals according to the wiring diagram. Power on the control supply and use the 40 – character LCD to configure basic parameters such as protection thresholds and trip delays. Test each protection function by simulating faults and verify that the relay trips correctly. Check the communication links to ensure basic data transmission to the monitoring system.

Maintenance Suggestions: Conduct regular visual inspections to check for loose connections, dust, or physical damage. Clean the relay’s exterior and ventilation slots with compressed air periodically. Verify measurement accuracy using standard test equipment at regular intervals. Review fault records to identify recurring issues. Keep the relay’s firmware updated if applicable. In case of malfunctions, refer to the user manual or contact GE technical support.

Service and Guarantee Commitment

GE provides a 12 – month warranty for the SR745-W2-P1-G1-HI-A-L-R, covering manufacturing defects and component failures under normal operating conditions. Technical support is available through GE’s customer service channels to assist with installation, commissioning, and troubleshooting. Customers can access product documentation via GE’s online portal. For warranty claims, GE will arrange repair or replacement promptly to minimize downtime, ensuring the reliable operation of the transformer protection system.