Product Model:469-P5-HI-A20-T-H
Brand: GE Multilin (Now part of ABB)
Product Type: Motor Protection Relay / Motor Management System
Product Variant: This specific suffix indicates a fully configured unit with display, communication, and hardware options.
Core Standard Specifications (Base 469 Model):
Input Voltage:** 85-265 VAC/VDC or 20-60 VDC (dependent on specific power supply ordered)
Operating Temperature:-20°C to +70°C
Protection Functions:Thermal Model (49), Start/Stall (14/51), Instantaneous & Time Overcurrent (50/51), Ground Fault (50G/51G), Phase Unbalance (46), Jam (48), Undercurrent (37), Under/Over Voltage (27/59), Under/Over Frequency (81O/U), Power Factor (55).
Control:** Programmable Logic, 2 Programmable Setpoint Groups, 6 Digital Inputs, 4 Form-C Relay Outputs (configurable).
Metering:** Current, Voltage, Power, Energy, Power Factor, Thermal Capacity, Motor Starts.
Communications:** Dual RS-485 ports (Modbus RTU), optional Ethernet (Modbus TCP, EtherNet/IP).
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**Product Configuration Breakdown (Based on Suffix)**
The suffix **-P5-HI-A20-T-H** details a specific factory configuration for the GE Multilin 469 relay:
P5: Power supply option (e.g., 85-265 VAC/VDC universal input).
HI: High-Intensity, backlit graphical LCD display for clear readability.
A20:Specific hardware configuration for **200:5 A CT inputs** (denoting the primary current rating for the connected Current Transformers).
T: Special function option (often indicates "Trip Unit" with enhanced protection logic or a specific thermal memory characteristic).
H:Enclosure rating (likely indicates a heavy-duty, sealed case for harsh environments).
This relay is a comprehensive intelligent electronic device (IED) designed to provide complete protection, control, monitoring, and diagnostic data for medium-voltage and large low-voltage motors (typically up to 10,000 HP).
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**Core Adaptation Scenarios**
Scenario 1: Preventing Catastrophic Motor Failure Due to Repeated Starts**
A large induced draft fan motor in a power plant fails prematurely. The root cause is overheating from too-frequent hot starts. The existing thermal overload relay cannot model the rotor heating accurately or log start history.
Adaptation Solution:** Installing the **469-P5-HI-A20-T-H** with its **advanced thermal model** provides separate, accurate heating calculations for the stator and rotor. It tracks motor thermal capacity used and enforces a programmable start inhibit time based on actual motor temperature. In a cement plant ball mill application, this capability reduced motor winding failures by over 80% by preventing starts on a hot rotor.
* **Scenario 2: Minimizing Process Downtime Through Advanced Diagnostics**
A critical pump motor driving a refinery process trips unexpectedly. The maintenance team spends hours troubleshooting the motor, starter, and load before finding the issue. The lack of data leads to extended downtime.
* **Adaptation Solution:** The **469** relay acts as a motor data hub. Upon a trip, the built-in **oscillographic fault recorder** captures current and voltage waveforms at the moment of fault. Detailed **Sequence of Events (SOE)** logs show the exact timing of protections. The cause (e.g., phase loss, locked rotor, severe unbalance) is immediately identified on the **HI display** or via communications. This reduces mean-time-to-repair (MTTR) from hours to minutes, as demonstrated in water treatment plant pump controls.
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**Service Guarantee and Support**
* **Warranty Service:** This critical motor protection relay is supplied with a **12-month warranty**. We guarantee it to be fully functional and configured to its specified order code.
* **Technical Support:** Our protection engineers provide exceptional support, including:
* **Setting Calculations:** Assistance with tailoring the thermal model and protection curves to your specific motor nameplate and CT data.
* **Integration Support:** Guidance for wiring, communicating via Modbus RTU to PLC/SCADA, and interpreting fault data.
* **Documentation:** Provision of the full **GEH-6721** manual, setting files, and application notes.
* **Reducing Decision-Making Concerns:** We ensure the relay's CT rating (**A20**) matches your field installation and that all configured features meet your application needs. We help de-risk the upgrade from simple overload relays to a full motor management system.
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**Related Product Recommendations**
* **Current Transformers (CTs):** Matched **5A secondary CTs** with a **200:1 ratio** for use with the **A20** input configuration.
* **Communication Converter:** For integration into Ethernet networks, a **Serial-to-Ethernet converter** (e.g., Digi One IAP) for the RS-485 port.
* **Motorized Breaker/Starter:** Compatible medium-voltage contactors or circuit breakers
