GE Multilin 369-HI-R-M-0-0-0-H-E is a digital motor management relay from the 369 series. It is specially developed for three-phase induction motors and synchronous pump motors, integrating all-in-one functions including motor protection, energy consumption metering, temperature monitoring, reverse rotation detection, fault recording and multi-protocol communication. The unit adopts a non-drawout design and is applicable to motor complete sets operating under harsh working conditions.

Compared with the base model, this variant is equipped with high-voltage control power supply, 12 built-in RTD temperature measurement channels, metering function package, harsh-environment coating and enhanced diagnostic panel. It enables full-lifecycle monitoring of motors and replaces multiple discrete devices such as traditional thermal overload relays, standalone temperature meters, multi-function power meters and fault recorders. This reduces the number of components inside control cabinets and cuts wiring and maintenance costs, making it the mainstream protection and control device for high-power industrial pump motors.

Model Code Breakdown (369-HI-R-M-0-0-0-H-E)

The model number consists of 10 segmented codes, each corresponding to fixed hardware or optional functions. Fill in 0 for unrequired options. The breakdown definitions are as follows:

1. 369: Base motor management relay unit with 1 built-in analog output channel
2. HI: Control power supply rating, wide-range 50–300 VDC / 60–265 VAC input; LO stands for 20–60 VDC / 20–48 VAC
3. R: 12 built-in RTD temperature sensing inputs; 0 means no integrated RTD channels
4. M: Metering function package (includes reverse rotation detection algorithm); 0 = no metering and no reverse rotation detection
5. 0: Fiber communication port; this model is not equipped with fiber ports, marked 0; F denotes fiber interface included
6. 0: Industrial fieldbus protocol; this model has no standalone bus module, marked 0; optional codes: E (Modbus/TCP), P (Profibus-DP), P1 (Profibus-DPV1), D (DeviceNet)
7. 0: Reserved expansion slot; fill 0 if no extra expansion configurations are selected
8. H: Harsh environment option, the whole unit is coated with moisture-proof, dust-proof and anti-corrosion conformal coating; 0 = standard unit for normal environments
9. E: Enhanced diagnostic suite + advanced operator panel, including motor health reports, startup logs, event oscillography and security audit; 0 = basic panel with simplified diagnostic functions

Core Product Features

Motor Protection Functions

Customizable overload curve protection, stall/jam protection, phase loss/phase unbalance protection, overvoltage and undervoltage protection, sensitive ground fault detection, reverse rotation detection, startup timeout protection, thermal memory protection, abnormal frequency protection and torque overload protection. Multi-stage pre-trip alarms are supported with graded alarm and trip signal outputs.

Temperature Monitoring Capacity

12 built-in RTD input channels monitor temperatures of motor stators, bearings and cooling media. Remote RTD modules can be added for extended data collection. Temperature readings are integrated into protection logic, triggering early warnings or direct tripping upon overtemperature conditions.

Metering & Data Recording

The M metering package provides real-time measurement of three-phase voltage, current, power factor, active/reactive power, energy and frequency. When paired with the E enhanced diagnostic suite, the relay fully records full-cycle data of every motor startup, fault oscillography, timestamped event logs and equipment operation security audit trails, and automatically generates motor health assessment reports.

Hardware & Environmental Adaptability

HI wide-range control power supply eliminates on-site power conversion modifications; H harsh-environment conformal coating withstands extreme temperatures, dust and humidity. The base unit comes with 1 analog output, and the M metering package adds another 3 analog output channels. It adopts a fixed non-drawout mounting design with LED indicators on the front panel to display motor operating status.

Communication & Supporting Software

Built-in RS232/RS485 communication ports; an F485 converter enables PC-based commissioning. Free EnerVista 369 configuration software is provided for parameter setup, data retrieval and fault waveform export. Optional fiber communication, Ethernet Modbus TCP and fieldbus protocols are available for connection to upper-level control systems.

Function Upgrade Mechanism

The hardware supports on-site function expansion. Users can apply to the manufacturer for an exclusive single-unit license key to activate factory-unselected features such as reverse rotation detection, metering and fieldbus communication without replacing the main unit.

Product Advantages

1. All-in-one integrated architecture. A single unit delivers five core functions including electrical protection, temperature monitoring, energy metering, fault tracing and remote communication, simplifying layout inside control cabinets.
2. Standard reverse rotation detection accurately identifies backward rotation of pumps after shutdown, and enables safe delayed restart to prevent impeller impact damage.
3. 12 built-in RTD acquisition channels simultaneously monitor temperatures of motor stator, front and rear bearings, and ambient conditions, issuing early warnings against overheating and insulation degradation.
4. The metering module collects real-time data of voltage, current, power and energy with precision compliant with plant-level energy consumption statistics requirements.
5. Special conformal coating for harsh environments withstands high temperature, dust, humidity and mild corrosive conditions. Its wide-range AC/DC control power supply adapts to power standards across various regions.
6. The enhanced diagnostic panel generates motor health reports, startup logs, fault oscillography and security audit logs, enabling fault localization without extra test equipment.
7. On-site function upgrade is supported. Unselected optional features can be activated via an exclusive license key with no need to replace the entire unit.
8. Compatible with multiple industrial communication protocols, it can be directly connected to DCS, SCADA and energy management platforms for centralized automated control scenarios.

Application Industries

Petrochemical transfer pump systems, municipal sewage pump stations, auxiliary water pumps for thermal power plants, metallurgical circulating cooling motors, mine drainage pump sets, water plant booster pumps, chemical circulating fans, oil & gas gathering and transportation pumps, large central air conditioning circulating pumps, and port water supply & drainage units.

Product Comparison

Comparison among Standard Base 369, 369-LO Low-Voltage Power Version and 469 Motor Relay

1. 369-HI-R-M-0-0-0-H-E: Designed for high-power pump motors. Equipped with reverse rotation detection, 12-channel RTD inputs, harsh-environment conformal coating and enhanced diagnostic functions. It delivers the most comprehensive feature set for pump stations and heavy-duty chemical motors with relatively higher procurement costs.
2. 369-LO-0-0-0-0-0: Adopts low-voltage control power supply without RTD channels, metering functions or harsh-environment protection. Only basic motor overload protection is available. Ideal for small fans and general light-load motors with the lowest cost.
3. 469 Series Relays: Built for clustered multi-motor protection and feature expanded I/O points, focusing on centralized monitoring of multiple motors. No integrated reverse rotation detection, making it unsuitable for pump applications requiring backward rotation protection.

FAQ

Q1: What functional defects will be caused by incorrect model code entry during purchasing?

A1: Each segment of the code corresponds to specific hardware and functions one-to-one. Setting segment R to 0 disables the built-in 12-channel RTD temperature measurement; setting segment M to 0 removes metering and reverse rotation detection functions; omitting segment H means no anti-corrosion coating, which shortens equipment service life significantly in humid and corrosive environments. Verify the full 10-digit code thoroughly before placing orders.

Q2: Can the H harsh-environment coating be retrofitted to standard base models on-site later?

A2: The H harsh-environment coating is a pre-treatment process applied to complete units at the factory and cannot be added post-installation on site. Select the H code segment at the time of purchase for humid or chemical corrosive working conditions.

Q3: Is reverse rotation detection only available via the M code segment?

A3: Official documentation confirms the M metering package integrates reverse rotation detection algorithms as standard. Pump reverse rotation identification cannot be activated without the M option, so the M segment is mandatory for pumping station equipment.

Q4: How to expand capacity if the built-in RTD temperature measurement channels are insufficient?

A4: The unit comes with 12 native RTD channels. For additional measuring points, pair the unit with external RRTD remote RTD modules connected via fiber optics or RS485 bus, which add another 12 temperature acquisition channels.

Q5: Which checkpoints should be inspected if the device fails to communicate?

A5: First verify wiring of the F485 converter, communication address and baud rate parameters; confirm whether fiber ports were specified at order time (fiber channels are disabled without the F segment); restart the relay and commissioning software to re-establish communication.

Q6: What exclusive functions are included in the enhanced diagnostic E package?

A6: It features an enhanced front panel with status indicator lights, motor health reports, startup data logs, advanced fault waveform recording and security audit event logging. None of these functions are available with the basic 0-standard panel.

Q7: What documentation is required to unlock non-factory-fitted functions via on-site upgrade?

A7: Provide the unique serial number printed on the relay body to authorized brand distributors to apply for a one-time exclusive authorization password. Entering the password unlocks optional features such as metering and communication without hardware replacement.

Q8: Does this model support draw-out plug-in structure?

A8: The entire 369 series only supports fixed non-drawout mounting and is incompatible with drawer-type switchgear. Adopt fixed-mount cutout layouts when designing complete switchgear assemblies.

Recommended Models of the Same Brand

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