Description
GE 516TX 336A4940DNP516TX – GE Multifunctional Protection Relay for Medium-Voltage Power Systems
Product Description
GE 516TX 336A4940DNP516TX is a high-performance multifunctional protection relay developed by GE Digital, a global leader in power system protection and industrial automation solutions. This relay GE 516TX 336A4940DNP516TX is specifically engineered to deliver comprehensive protection, control, and condition monitoring for critical medium-voltage (3–35kV) power equipment, including transformers, high-voltage motors, generators, and power cables, widely deployed in industrial plants, distribution substations, and renewable energy facilities [Product Link]. Leveraging advanced microprocessor technology, precise measurement algorithms, robust hardware design, and exceptional adaptability to harsh power system environments (such as voltage fluctuations, electromagnetic interference, and extreme temperatures), GE 516TX 336A4940DNP516TX seamlessly integrates into both new and retrofitted power systems. As a core component of GE’s power protection portfolio, GE 516TX 336A4940DNP516TX demonstrates outstanding reliability and rapid fault response capabilities, effectively mitigating equipment damage risks and minimizing downtime [Product Link]. Whether safeguarding traditional thermal or hydropower systems or enabling grid integration of solar and wind energy, GE 516TX 336A4940DNP516TX ensures the safe and stable operation of power systems, embodying GE’s profound expertise in power protection technology.
Technical Parameters
- Device Type: Multifunctional protection relay for medium-voltage (3–35kV) power systems
- Core Protection Functions:
- Short-Circuit Protection: Three-stage overcurrent protection (instantaneous, time-delayed instantaneous, overcurrent) with adjustable setting range 0.5–20×CT rated current and operating time 0.01–10s
- Overload Protection: Inverse-time or definite-time selectable, setting current 1.0–1.5×rated current, operating time 1–120s
- Voltage Protection: Overvoltage protection (105–120% rated voltage), undervoltage protection (80–95% rated voltage), operating time 0.1–10s
- Additional Protection: Phase-failure protection, earth fault protection, CT open-circuit detection, overtemperature protection (optional)
- Measurement Parameters:
- Current Measurement: Configurable CT ratio 1–2000:5A, accuracy ±0.2%FS
- Voltage Measurement: Configurable VT ratio 100–10000:100V, accuracy ±0.2%FS
- Power Measurement: Active power, reactive power, apparent power, accuracy ±0.5%FS
- Frequency Measurement: 45–65Hz, accuracy ±0.01Hz
- Communication & Control:
- Communication Interfaces: RS-485 (supports Modbus RTU), Ethernet (supports Modbus TCP, DNP3.0 protocols)
- Control Outputs: 4 groups of programmable relay outputs (NO/NC selectable), rated load AC 250V/5A, DC 30V/3A
- Signal Inputs: 8 digital inputs (for external interlock signal access)
- Power Supply & Power Consumption:
- Supply Voltage: AC/DC 110–240V (wide voltage adaptation), power consumption ≤15W
- Environmental & Mechanical Specifications:
- Operating Temperature: -40℃~+70℃ (operation), -40℃~+85℃ (storage)
- Protection Class: IP54 (suitable for outdoor distribution cabinets or harsh indoor environments)
- Mounting Type: Panel mounting/rail mounting optional
- Dimensions: 144mm (width) × 144mm (height) × 120mm (depth)
- Weight: Approximately 1.8kg
- Certifications & Standards:
- Complies with IEC 61850, IEC 60255, UL 508, CE and other international standards
- Protection Setting Storage: Non-volatile memory, data retention ≥10 years after power-off
Advantages and Features
GE 516TX 336A4940DNP516TX stands out for its perfect integration of “multifunctional integration” and “high-precision protection”. A single device can implement multiple protection functions such as short-circuit, overload, and voltage abnormality protection, replacing multiple traditional single-function relays. This significantly simplifies system wiring and cabinet layout, reducing equipment procurement and maintenance costs. Equipped with a 32-bit high-speed microprocessor, the relay shortens fault identification response time to milliseconds, enabling rapid disconnection of fault circuits before faults escalate, thereby maximizing protection of power equipment from damage. In terms of data monitoring, GE 516TX 336A4940DNP516TX supports real-time collection of key parameters such as current, voltage, and power, which are uploaded to the monitoring system via standard communication protocols. This facilitates maintenance personnel to remotely grasp equipment operating status and implement predictive maintenance. Additionally, the relay features flexible setting configuration, allowing modification of protection parameters through both panel buttons and upper computer software to adapt to the protection needs of different types of power equipment. Meanwhile, its IP54 high protection class and wide temperature operating range enable it to adapt to harsh working environments such as outdoor substations and metallurgical workshops, with stability far exceeding that of ordinary similar protection relays.
Application Fields and Cases
GE 516TX 336A4940DNP516TX is widely used in medium-voltage distribution systems, industrial power transmission, and new energy grid integration, primarily adapting to the protection and control of transformers, high-voltage motors, generators, and power cables. In the 10kV high-voltage motor power system of a large iron and steel plant’s blast furnace fan, GE 516TX 336A4940DNP516TX is used to protect the motor. When the motor experiences overload or single-phase earth fault, the relay acts quickly to cut off the power supply, preventing motor burnout. Its precise inverse-time overload protection curve perfectly matches the thermal characteristics of the motor, ensuring the continuous and stable operation of the fan system. In a 10kV distribution substation of an urban power distribution network, GE 516TX 336A4940DNP516TX is responsible for the comprehensive protection of transformers. By monitoring the load current and winding temperature of the transformer, it realizes overload early warning and fault tripping. Simultaneously, it uploads operating data to the distribution network monitoring center, assisting maintenance personnel in achieving remote monitoring and fault location. In the 10kV grid integration system of a photovoltaic power plant, the relay is used to monitor the current and voltage phase of the grid-connected line. When voltage fluctuations or frequency abnormalities occur, it quickly disconnects the grid-connected switch, protecting core equipment such as photovoltaic inverters from grid impacts.
Comparison with Competitors
Compared with similar medium-voltage protection relays such as Siemens 7SJ61 and ABB REF615, GE 516TX 336A4940DNP516TX has three core advantages. Firstly, it offers higher functional integration. At the same price point, it implements more protection functions without the need for additional auxiliary relays, resulting in better cost-effectiveness. Secondly, it boasts stronger compatibility with communication protocols, supporting multiple protocols such as Modbus, DNP3.0, and IEC 61850. This allows seamless integration into monitoring systems of different brands, providing greater adaptability. Thirdly, it has a higher protection class (IP54), surpassing the IP20 protection of most competitors, making it more suitable for installation in outdoor or harsh environments. However, in terms of high-end customized protection logic development, GE 516TX 336A4940DNP516TX is slightly inferior to the open programming function of Siemens 7SJ61. Nevertheless, for the standard protection needs of most medium-voltage power systems, its functions are fully sufficient, and it is more competitive in terms of stability and cost control.
Selection Suggestions and Precautions
When selecting GE 516TX 336A4940DNP516TX, precise matching should be based on the protected object (transformer/motor/cable), voltage level (3–35kV), CT/VT ratio, and protection requirements. For protecting high-voltage motors, it is crucial to configure phase-failure protection and overload protection functions, and match the rated current and starting characteristics of the motor. For transformer protection, earth fault protection and overtemperature protection (requiring an external temperature sensor) should be enabled. For new energy grid integration, ensure the relay supports the DNP3.0 protocol to communicate with the grid-connected monitoring system. During installation, strictly distinguish between current circuits, voltage circuits, and control circuits in accordance with the wiring diagram to avoid relay damage or incorrect protection actions due to wiring errors. Meanwhile, ensure reliable grounding of the relay with a grounding resistance ≤4Ω to enhance electromagnetic interference resistance. In daily maintenance, regularly check the status of the relay panel indicators and the stability of communication connections. Verify the protection settings and measurement accuracy through upper computer software every six months. If a fault alarm occurs, record the alarm information before resetting to facilitate fault cause analysis. It should be noted that the protection settings of GE 516TX 336A4940DNP516TX must be configured by professional power engineers based on equipment parameters. Modification by non-professionals is prohibited, as it may lead to protection failure or equipment damage.
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