SR469-P5-HI-A20 GE Motor Management Relay new

• Brand
  GE
• Model
  SR469-P5-HI-A20
• Product Name
  Motor Management Relay
• Place of Origin
  Canada
• Customs HS Code
  85364900
• Power Supply
  70‑265 VAC
• Dimensions
  229 mm × 254 mm × 254 mm
• Weight
  7.3 kg
• Operating Temperature
  ‑20 °C to +60 °C
• Storage Temperature
  ‑40 °C to +85 °C
• Warranty
  12 month
• Product Status
  brand new

GE SR469-P5-HI-A20 Voltage and Current Detailed Specifications

Current-Related Parameters

Analog current input (CT secondary): 5 A, high-impedance HI-type input, compatible with 5 A output from secondary side of motor-protection current transformer. Only AC current signals from CT secondary are accepted, and sampling calculation is completed inside the relay.

Rated current of relay output contacts: 5 A @250 VAC for resistive load; 5 A @30 VDC. Contacts are used for tripping, alarm and motor logic control, and cannot directly drive high-power loads.

4-20 mA analog output loop: Programmable isolated 4-20 mA, maximum loop burden impedance 1200 Ω, full-scale accuracy ±1% FS. Output current signals corresponding to measured values such as current, voltage, power and temperature are transmitted to DCS/SCADA systems.

Digital inputs: 8-channel optically-isolated digital inputs with 24 VDC sinking logic; driving current is supplied by external 24 VDC circuit.

Voltage-Related Parameters

Analog voltage input (VT secondary): AC voltage from secondary side of voltage transformer. Configurable VT ratio ranges from 1.00-150.00:1. Both delta and star wiring modes are supported for motor/busbar voltage acquisition.

HI universal auxiliary power supply (HI variant of this model):

AC power supply: 70-265 VAC, 48-62 Hz

DC power supply: 90-300 VDC

Wide-range AC/DC universal operating power supply for powering relay main board, display, communication and logic circuits.

Operating voltage for relay contacts: Maximum 250 VAC for AC, maximum 30 VDC for DC. This refers to external circuit voltage for contacts instead of operating power supply of the relay.

Operating voltage for digital inputs: External 24 VDC; optically-isolated discrete-signal acquisition.

Supplementary Notes

High-voltage and heavy-current signals from motor primary side shall not be directly connected to this relay. All voltage and current signals are low-level secondary signals obtained from CT and VT.

The 4-20 mA signal is output signal current rather than power current. It cannot drive motor equipment and is only applied for measurement transmission.

HI stands for high-impedance current input variant. Different from low-impedance 5 A input models, it imposes lower burden requirements on current transformers.

GE SR469-P5-HI-A20 Technical Specification

General Description

The SR469-P5-HI-A20 is a member of the GE Multilin 469 series, a full-featured motor management relay designed for medium and large alternating current (AC) motors. Manufactured by GE Vernova, this device integrates comprehensive functionalities including motor protection, power metering, temperature monitoring, local and remote control, and industrial communication capabilities. In the model designation, “HI” denotes the high-impedance universal power supply version, while “A20” signifies the factory-configured option of four-channel isolated 4–20 mA analog outputs.

Input Specifications

Analog Current Inputs: High-impedance HI-type inputs compatible with 5 A phase current transformer (CT) secondary circuits.

Analog Voltage Inputs: Designed for phase voltage transformer (VT) secondary connections, featuring configurable VT transformation ratios ranging from 1.00 to 150.00:1, with support for both delta and star wiring configurations.

RTD Inputs: Equipped with up to 6 channels of 3-wire resistance temperature detector (RTD) inputs. It supports 100 Ω platinum (Pt), 100 Ω nickel (Ni), 120 Ω nickel (Ni), and 10 Ω copper (Cu) sensors to enable precise temperature monitoring of motor stators and bearings.

Digital Inputs: 8 optically isolated digital inputs with 24 VDC sinking logic for reliable discrete signal acquisition.

Power Supply Input (HI Variant): Universal auxiliary power supply accommodating 70–265 VAC (48–62 Hz) or 90–300 VDC input voltages, delivering wide-range operational adaptability.

Output Specifications

Relay Outputs: Features 6 Form-C relay contacts. Each contact is rated for 5 A at 250 VAC (resistive load) and 5 A at 30 VDC, and can be flexibly configured for tripping, alarm triggering, and motor control logic applications.

Analog Outputs (A20 Option): Provides 4 galvanically isolated, programmable 4–20 mA analog outputs. These outputs offer a maximum load burden of 1200 Ω and a full-scale accuracy of ±1%, and can be assigned to transmit measured parameters including current, voltage, power, frequency, and temperature.

Communication Ports: Fitted with a front-panel RS232 port for local commissioning. Two rear-mounted isolated half-duplex RS-485 ports are provided for field bus communication, with an optional 10 Mbps 10Base-T Ethernet (RJ45) port available for high-speed network connectivity, sourced from GE Vernova’s standard configuration.

Supported Communication Protocols

Fully compatible with Modbus RTU and Modbus TCP/IP industrial communication protocols, ensuring seamless integration with mainstream industrial control systems.

Core Protection and Control Functions

The relay delivers comprehensive motor protection and intelligent control features. It offers thermal overload protection with dual selectable thermal curves, as well as dedicated motor start-up protection and blocked-start protection. Electrical fault protection covers phase and ground overcurrent, current unbalance, and negative sequence overcurrent conditions.

Additionally, it supports overvoltage, undervoltage, load loss, and torque-based motor protection. For operational control, it enables reduced-voltage start regulation, circuit breaker control, and custom interlock logic configuration. The device also integrates event sequence recording and COMTRADE oscillography functions to capture and store fault waveforms for post-fault analysis and troubleshooting.

Metering and Monitoring Capabilities

This relay performs high-precision metering of key electrical parameters, including three-phase current and voltage, active/reactive/apparent power, power factor, grid frequency, accumulated energy consumption, and real-time demand values.

It enables continuous real-time temperature monitoring of motor critical components via RTD inputs, and supports hot-spot temperature calculation to predict and prevent motor overheating failures.

Software Compatibility

The dedicated GE EnerVista 469 Setup Software supports full device configuration, real-time metering data viewing, historical event log review, and COMTRADE fault waveform analysis. Beyond native software, the relay supports interoperability with third-party Supervisory Control and Data Acquisition (SCADA) and Distributed Control System (DCS) platforms via standard Modbus protocols.

Operating System Compatibility

The GE EnerVista 469 Setup Software is compatible with Windows XP, Windows 7, and Windows 10 operating systems (both 32-bit and 64-bit versions) for PC-based configuration and monitoring. Field integration is applicable to all generic DCS and SCADA systems that support Modbus RTU and Modbus TCP/IP protocols.

Environmental and Mechanical Characteristics

Operating Environment: Operational temperature ranges from -40 °C to +60 °C, with a non-condensing relative humidity range of 5% to 95% RH for stable operation in harsh industrial environments.

Mounting Options: Supports standard panel mounting and 19-inch rack mounting for flexible cabinet installation.

Human-Machine Interface (HMI): Equipped with a front-panel backlit 40-character LCD display, LED status indicator lights, and a dedicated numeric keypad for on-site parameter checking, configuration, and status diagnosis.

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