I/O modules

Product Overview

The GE 369-HI-R-0-0-0-E functions as a comprehensive motor protection relay from the Multilin 369 series for industrial applications. This device provides complete protection, monitoring, and control for medium and large induction motors. We engineered the 369-HI-R-0-0-0-E to safeguard critical motors against electrical and thermal damage while providing valuable operational data.

Technical Specifications

Key Features and Benefits

• Comprehensive Motor Protection: The 369-HI-R-0-0-0-E provides over 40 protection functions including overload, locked rotor, phase imbalance, and ground fault. Consequently, your motors receive complete protection against electrical and mechanical faults.

• Twelve RTD Inputs for Thermal Monitoring: This relay monitors up to 12 RTDs for stator, bearing, and motor cooling air temperatures. Therefore, you detect overheating conditions before they cause insulation failure or bearing damage.

• Wide-Range Control Power: The universal power supply accepts 50-300 VDC or 60-265 VAC without configuration changes. You install this relay in facilities with different control voltages without modification.

• Flexible I/O Configuration: Six digital inputs and six output relays provide ample interface for local control and annunciation. You connect start/stop buttons, auxiliary contacts, and alarm devices directly to the relay.

• Advanced Metering and Diagnostics: The relay measures and displays current, voltage, power, and energy values in real time. You access detailed trip data and waveforms for post-event analysis and troubleshooting.

Detailed Functional Description

The primary function of the GE involves protecting induction motors from damaging operating conditions. Specifically, it continuously monitors three-phase currents and ground current through external CTs. It applies thermal model algorithms to calculate motor heating based on current magnitude and duration. The relay compares these calculations with preset trip curves and initiates trips when limits exceed. Furthermore, it monitors RTD temperatures directly, providing backup thermal protection and bearing condition monitoring.

RTD Input Capabilities

We designed the with extensive RTD monitoring for complete motor thermal management:

Each RTD channel independently configures for alarm and trip thresholds with programmable time delays.

Protection Functions Summary

The GE 369-HI-R-0-0-0-E includes these essential protection elements:

• Thermal Overload: Adjustable curve shapes, hot/cold motor modeling

• Locked Rotor: Separate pickup and time settings for starting

• Short Circuit: Definite time or inverse time characteristics

• Phase Imbalance: Current and voltage imbalance protection

• Ground Fault: Sensitive ground fault detection (optional zero-sequence CT)

• Undercurrent/Load Loss: Pump unload, belt failure detection

• RTD Temperature: Individual or voting logic for alarm/trip

• Jam/Jog Protection: Mechanical stall detection

User Interface and Display

The 369-HI-R-0-0-0-E features an intuitive front panel interface:

• LCD Display: 2-line x 16-character backlit display shows metering and settings

• Navigation Keys: Four buttons for menu navigation and value adjustment

• LED Indicators: Trip, alarm, and relay status LEDs

• Keypad Lock: Security feature prevents unauthorized changes

Communication and Integration

This relay includes standard RS-485 communication with MODBUS RTU protocol. You therefore integrate it with PLCs, SCADA systems, and plant DCS for remote monitoring and control. Optional communication modules add Profibus, DeviceNet, or Ethernet connectivity.

Installation and Configuration

Engineers install the in panel cutouts or optional rack mounting hardware. The process involves:

1. Mounting the relay and connecting control power

2. Wiring current transformers to the appropriate terminals

3. Connecting RTDs using shielded 3-wire cables

4. Wiring digital inputs and output relays as required

5. Configuring protection settings via front panel or software

6. Testing functionality before placing motor in service

Mechanical Details

The GE 369-HI-R-0-0-0-E features a rugged metal enclosure suitable for industrial environments. Its front panel includes a sealed keypad and display for washdown areas. Removable terminal blocks simplify field wiring and future replacement. The relay includes drawout construction allowing removal without disturbing field wiring.

Common Industrial Applications

The GE protects critical motors across numerous industries:

Why Choose This Relay?

Selecting the GE 369-HI-R-0-0-0-E means choosing a proven, comprehensive motor protection solution for your critical assets. You gain over 40 protection functions in a single device, eliminating multiple discrete relays and simplifying panel design. The twelve RTD inputs provide complete thermal monitoring of motor windings and bearings, preventing costly failures. Universal control power simplifies installation and reduces spare parts inventory. With flexible I/O and communication options, this relay integrates easily into new or existing control systems. For reliable motor protection in demanding industrial applications, the 369-HI-R-0-0-0-E delivers the performance and features you need.

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