WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
3. Order Code Nomenclature Breakdown
Every character in the 469-P5-HI-A20-T part number identifies a critical hardware or communication parameter. Using GE Multilin’s official SR 469 selection guide, the code translates as follows:
| Code Segment | Parameter | Selected Option Details |
| 469 | Base Relay Model | Multilin 469 Motor Management Relay |
| P5 | Phase Current Inputs | 5 Amp Phase CT Secondaries (Standard industrial CT pairing) |
| HI | Control Voltage Supply | High-Range Operating Power: 90–300 VDC / 70–265 VAC (48–62 Hz) |
| A20 | Analog Outputs | Four 4–20 mA active analog outputs (internally sourced) |
| T | Communications | Enhanced Front Panel + 10BaseT Ethernet Port (Rear RJ-45) |
4. Key Technical Specifications
| Parameter | Value |
| Phase Current Inputs | 5A secondary rating (Input burden < 0.2 VA at 5A) |
| Ground Current Input | 1A / 5A dual-range ground CT or sensitive 50:0.025 zero-sequence CT |
| VT Voltage Inputs | 3-phase Delta or Wye configurations; range 50 to 240 VAC continuous |
| Auxiliary Power (HI) | 90–300 VDC / 70–265 VAC (Max. 30 VA draw) |
| RTD Inputs | 12 channels supporting Platinic, Nickel, or Copper RTD arrays |
| Analog Outputs (A20) | 4 channels of 4–20 mA loop outputs (Max. load 1200 \Omega) |
| Front Serial Port | 1 x RS-232 connection (9600 to 19200 baud rate) |
| Rear Serial Ports | 2 x RS-485 interfaces supporting Modbus RTU protocols |
| Rear Ethernet Port (T) | 1 x 10BaseT RJ-45 port (Requires case cut-out frame) |
| Physical Construction | Sealed draw-out case with front grab-handle and locking tabs |
| Environmental Temperature | Operating Range: -40°C to +60°C (-40°F to +140°F) |
5. Product Introduction & Application Strategy
The GE Multilin SR469-P5-HI-A20-T is a premier, industry-standard digital protection relay engineered to monitor, protect, and manage critical medium-voltage (typically 2.3 kV to 13.8 kV) and large low-voltage three-phase AC motors. The relay uses a sophisticated thermal algorithm that factors in RTD stator temperature feedback, negative sequence current unbalance (which causes rapid rotor heating), and historical motor load data. This advanced modeling enables the 469 to protect assets against overload, phase unbalance, mechanical jam, stalled rotor, and single-CT differential faults.
From an engineering and spare parts perspective, the 469-P5-HI-A20-T is a high-value asset. Large industrial motors run critical applications—such as cooling water pumps, high-volume draft fans, process compressors, and wood chippers—where an unmanaged motor failure can cost hundreds of thousands of dollars in repairs and lost production.
Sourcing this module as a certified New Surplus spare is highly recommended over third-party refurbished alternatives. Protection relays are continuously energized and handle high input currents; rebuilt units can have aged internal capacitors, drifted analog-to-digital converters, or worn backplane connector fingers. Keeping a factory-sealed, zero-hour surplus 469 on hand allows maintenance crews to execute a hot draw-out swap in minutes, restoring full motor protection immediately.
- SR469-P5-HI-A20-T
- SR469-P5-HI-A20-T
6. Installation & Network Integration Guide
Stage 1: Pre-Installation Prep
Ensure the medium-voltage breaker or contactor feeding the motor is completely locked out and tagged out (LOTO). Verify that the secondary circuits of the active CT arrays are shorted before opening any terminal links to prevent generating lethal open-circuit voltages. Wear a grounded ESD wrist strap before handling the relay or inserting it into the draw-out cradle.
Stage 2: Mechanical Insertion
The SR469 uses a convenient draw-out case construction. To insert the relay:
- Lift the locking tab on the front cover handle and pull the handle outward.
- Slide the relay chassis into the guide channels of the outer case.
- Push the assembly firmly until the rear terminal contacts slide into the backplane fingers.
- Push the handle down until the locking tab clicks closed, securing the relay.
⚠️ ETHERNET CASE COMPATIBILITY: The “T” option indicates that the rear of this relay is equipped with an RJ-45 10BaseT Ethernet port. When installing the 469-P5-HI-A20-T as a replacement for an older unit that lacked Ethernet (e.g., an “A20-E” model), verify that the existing metal outer case has the required rear punch-out/cut-out to expose the RJ-45 port. If not, the relay’s RJ-45 jack will collide with the solid metal back of the older case, preventing it from seating correctly.
Stage 3: Wiring Configuration
Wire the connections to the rear terminals according to your schematic:
- Phase CTs: Connect the 5A secondary lines from Phase A, B, and C to the P5 terminals.
- Control Power: Apply supply voltage to the high-voltage “HI” terminals.
- Ethernet: Plug a standard Cat5e network cable directly into the rear RJ-45 port to integrate the unit into your SCADA system.
Stage 4: Setpoint Configuration
- Energize the relay’s control power. The alphanumeric LCD will boot and display the English interface.
- Connect your PC to the front RS-232 port or via Ethernet.
- Launch the EnerVista 469 Setup software.
- Upload your engineered setting file (.469 format), making sure to configure the CT ratio, motor Full Load Amps (FLA), RTD sensor curves, and the Modbus IP address.
- Verify that the “Ready” LED on the front panel illuminates solid green and that no diagnostic or self-test faults are active.
7. Frequently Asked Questions (FAQ)
What is the advantage of the “T” communication option over the “E” option?
The “T” suffix signifies that the relay includes both an enhanced front panel display and a dedicated 10BaseT RJ-45 Ethernet port on its rear plate. The older “E” suffix indicates an enhanced front panel only, relying on standard RS-485 serial connections for network communications. The Ethernet port on the “T” model allows for faster, direct integration into modern plant SCADA networks, enabling high-speed diagnostic uploads, waveform capture reviews, and remote configurations via Modbus TCP.
Is this GE Multilin 469 relay brand new, or is it a used/rebuilt unit?
This product is a Brand New Surplus unit. It is not used, has not been recovered from a decommissioned panel, and has not undergone third-party electronic repairs. The relay is delivered inside its original protective packaging, featuring clean contact tracks, a scratch-free front display, and untouched internal memory registers.
How does the 469’s thermal model protect the motor from starting too often?
The internal thermal model tracks motor heating in real-time, storing the current value in a Thermal Capacity Used (TCU) register. The relay enforces protective features—such as “Starts-per-Hour” and “Time-Between-Starts”—to prevent the motor from restarting before it has cooled down sufficiently, protecting the rotor and stator windings from cumulative thermal damage.
What is the correct warranty period for this obsolete surplus relay?
Every New Surplus SR469-P5-HI-A20-T relay comes with our comprehensive 1-year operational warranty from your date of purchase. If any hardware or component defect occurs during this period under normal operating parameters, we will facilitate an immediate replacement or repair.
