Product Short Description
Function Characteristics
- 5A Phase/Ground Current Monitoring: 5A phase and ground current inputs ensure accurate measurement of motor currents, enabling precise detection of overcurrent, short circuit, and ground fault conditions.
- Comprehensive Protection Suite: Delivers overload (thermal model-based), short circuit, ground fault, locked rotor, phase loss/unbalance, undervoltage, and breaker failure protection to cover all critical motor fault scenarios.
- Advanced Thermal Modeling: Calculates real-time winding temperature using a built-in thermal model, preventing insulation damage due to overheating and supporting predictive maintenance.
- Flexible I/O Configuration: 10 contact inputs for external control/interlock signals and 6 Form-C output relays (5A at 250V AC / 0.5A at 30V DC) for alarm and control actions.
- Precise Electrical Measurement: Measures phase current, ground current, line voltage, frequency, power, and energy with high accuracy for performance analysis and energy management.
- Fault Event Logging: Stores up to 100 fault events with time stamps, enabling quick troubleshooting and root-cause analysis.
- Seamless System Integration: Isolated RS-485 (Modbus RTU) communication interface allows integration with SCADA, DCS, and other industrial control systems for centralized monitoring and control.
- Robust Environmental Design: Operates reliably in extreme temperature ranges (-40°C to +70°C) and withstands vibration, dust, and humidity common in industrial settings.
Description
Product Introduction
This relay is designed to protect medium and high-voltage three-phase AC motors from electrical and thermal faults in critical industrial applications. It integrates advanced microprocessor technology with 5A phase and ground current inputs, supporting precise measurement of electrical parameters and real-time fault detection. The device delivers a full suite of protection functions including overload, short circuit, ground fault, locked rotor, phase loss, and undervoltage protection, alongside thermal modeling for winding temperature monitoring. It features an English interface, a standard serial number tag, and flexible I/O for seamless integration with motor control centers (MCCs) and automation systems. It maximizes motor uptime, reduces maintenance costs, and ensures safe operation in harsh industrial environments by providing reliable protection and actionable operational data.
Technical Specifications
| Specification | Details |
|---|---|
| Series | GE Multilin 339 Motor Protection System |
| Product Type | Medium/High Voltage Motor Protection Relay |
| Phase Current Inputs | P5: 5A nominal (3-phase CT-connected) |
| Ground Current Input | G5: 5A nominal (dedicated ground CT input) |
| Control Power Supply | H: 110-250V DC / 110-230V AC (50/60 Hz) |
| User Interface | E: English without programmable LEDs |
| I/O Configuration | E: Standard I/O (10 contact inputs, 6 Form-C output relays) |
| Serial Number Tag | SN: Standard serial number tag for traceability |
| Voltage Input | Up to 600V AC (line voltage monitoring for phase protection) |
| Operating Frequency | 50/60 Hz (global power system compatibility) |
| Overload Trip Accuracy | ±1% of displayed value |
| Communication Interface | Isolated RS-485 (Modbus RTU) for SCADA/DCS integration |
| Operating Temperature | -40°C to +70°C (harsh environment tolerance) |
| Storage Temperature | -25°C to +85°C |
| Enclosure Protection | Front panel IP30; NEMA 1/IP20 when mounted in MCC |
| Dimensions (W x H x D) | 180 mm x 165 mm x 215 mm |
| Weight | 1.2 kg (approximate) |
| Certifications | UL, CSA, CE compliant; IEC 61850 compatible |
Application Scenarios
- Medium/High Voltage Motor Control Centers (MCCs): Protects motors in manufacturing plants, refineries, and processing facilities, ensuring reliable operation of pumps, fans, compressors, and generators.
- Oil and Gas Industry: Safeguards motors in pipeline compressors, wellhead pumps, and refinery equipment, with robust protection against electrical faults in high-temperature and remote environments.
- Power Generation: Protects auxiliary motors in thermal, hydro, and nuclear power plants (e.g., boiler feed pumps, cooling tower fans) from electrical and thermal stress during continuous operation.
- Mining and Heavy Industry: Shields motors in crushers, grinders, and material handling systems, withstanding vibration, dust, and extreme temperatures common in mining operations.
- Water and Wastewater Treatment: Protects motors driving pumps, aerators, and mixers from overloads and phase-related faults in corrosive and humid environments.
- Chemical Processing: Ensures motor reliability in agitators, reactors, and transfer pumps, supporting continuous production with precise fault detection and protection.
- Renewable Energy: Protects medium-voltage motors in wind turbine generators and solar power plant auxiliary systems, ensuring consistent energy production.
Additional Information
- Configuration Software: Compatible with GE Multilin EnerVista 339 software for remote configuration, real-time monitoring, and data logging.
- User Manual: Official user manual (GEK-106613C) provides detailed installation, configuration, and troubleshooting guidelines.
- Warranty: 12-month standard warranty, with extended warranty options available for critical applications.
- Replacement Compatibility: Directly replaces older 339 series relays, with backward-compatible wiring and programming for seamless upgrades.
- Maintenance Requirements: Minimal maintenance; annual calibration of current inputs and software updates recommended to maintain optimal performance.
- Environmental Compliance: Meets IEC 61850 communication standards and pollution degree II, overvoltage category II requirements for safe and reliable operation.
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