GE SR745-W2-P5-G5-HI

Description

Introduction to the GE SR745-W2-P5-G5-HI

Product Description

The GE SR745-W2-P5-G5-HI is a versatile and high-precision multifunction power quality and revenue metering relay from GE’s (now part of ABB) extensive line of protection and control devices. This advanced meter is engineered to perform comprehensive monitoring, measurement, and analysis of electrical parameters in three-phase power systems. The GE SR745 platform is renowned for its accuracy and robust feature set, serving critical roles in energy management, power quality analysis, and sub-station automation. This specific variant, identified by the suffix -W2-P5-G5-HI, denotes a particular configuration of hardware options, input types, communication protocols, and power supply. Its primary function is to provide utilities and industrial facilities with reliable data for billing, system performance verification, and diagnostics. The installation and configuration of the GE SR745-W2-P5-G5-HI are integral to modern power monitoring schemes.

Product Parameters

• Product Series: GE Multilin SR 700 Series

• Model: SR745-W2-P5-G5-HI

• Device Type: Transformer Differential Relay with enhanced metering and power quality functions.

• Input Ratings: Designed for specific CT/VT ratios, with the suffix indicating options for sensing inputs (e.g., 5A or 1A current inputs, voltage levels).

• Measurements: Provides comprehensive data including: Volts, Amps, kW/kVAR/kVA, kWh/kVARh, Power Factor, Frequency, Harmonics (THD), and sequence components.

• Communication Protocols: Typically includes multiple ports supporting protocols like Modbus RTU, Modbus TCP/IP over Ethernet, DNP3.0, and IEC 61850, as specified by the suffix.

• Power Supply: The “-HI” suffix often indicates a high-input range power supply (e.g., 85-265 VAC/DC).

• Relay Outputs: Includes configurable Form-C contact outputs for alarms or control.

• Standards: Meets accuracy standards such as ANSI C12.20 and IEC 60687 for revenue metering.

Advantages and Features

The GE SR745-W2-P5-G5-HI offers significant advantages in power system intelligence. Its key feature is the integration of high-accuracy revenue-grade metering with detailed power quality analysis in a single device, eliminating the need for separate meters and analyzers. It provides advanced harmonic analysis and waveform capture, enabling precise troubleshooting of electrical disturbances. The relay offers extensive communication capabilities, allowing seamless integration into SCADA, DCS, or plant-wide energy management systems. The robust construction and wide-range power supply of the GE SR745 ensure reliable operation in diverse electrical environments, from utility substations to heavy industrial plants.

Application Cases in Industry

This device is critical in applications requiring precise energy measurement and power quality assurance. In utility transmission and distribution substations, the GE SR745-W2-P5-G5-HI is used for feeder metering, transformer monitoring, and inter-tie metering. For large industrial plants and manufacturing facilities, it monitors energy consumption at the main intake or for individual high-demand processes, aiding in cost allocation and peak demand management. In renewable energy installations, such as solar farms or wind parks, it meters the power output to the grid and monitors power quality for compliance. It is also essential in data centers and critical infrastructure for monitoring utility power quality and ensuring service level agreements are met.

Comparison with Competing Products

Compared to competing power meters from manufacturers like Schneider Electric (PowerLogic PM800 series) or Siemens (SENTRON PAC), the GE SR745-W2-P5-G5-HI distinguishes itself with its strong heritage in protective relaying, offering a unique blend of high-end protection algorithms with top-tier metering accuracy. While dedicated meters may offer slightly more metering-specific features, and dedicated power quality recorders may offer deeper analysis, the GE SR745 provides an exceptional balance of both, along with robust communication and integration features typical of GE Multilin devices. Its configuration and diagnostic tools through EnerVista software present a cohesive user experience for those already within the GE ecosystem.

Selection Suggestions and Precautions

Selecting the correct GE SR745-W2-P5-G5-HI requires careful analysis of the suffix codes. Confirm that the current and voltage input ratings (denoted by -P5, etc.) match your system’s instrument transformer secondary outputs. The communication protocol selection (-G5, etc.) must align with your network architecture (e.g., Ethernet with IEC 61850 or serial Modbus). Verify the required power supply range and the number/form of relay outputs needed for your alarm and control schemes.

Precautions:

• Installation and wiring must be performed by qualified electricians following all local and national electrical safety codes.

• Proper sizing, connection, and grounding of Current Transformers (CTs) and Voltage Transformers (VTs) are critical for safety and measurement accuracy.

• The configuration of the SR745-W2-P5-G5-HI is complex; it should be programmed using the official GE EnerVista software by trained personnel.

• For revenue-critical applications, verification and certification of meter accuracy by a qualified body may be required after installation.

• Ensure the device’s firmware is up to date for optimal performance and security.

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