Product Overview
The 350-C-P5-G5-H-S-M-N-P-SN-D-N is one of the 350 series protective feeder relays by GE Multilin. It is applied in protection and control, and monitoring of distribution lines in power distribution systems. The relay monitors the feeders in real time and automatically responds to overcurrent and ground faults, and phase-to-phase faults to minimize the damage to equipment and ensure stability of the system.
Detailed Specs
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Manufacture |
GE Multilin 350
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Model |
350-C-P5-G5-H-S-M-N-P-SN-D-N |
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Description |
Feeder Protection Relay |
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Origin |
USA |
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Dimension |
30*30*20cm |
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Weight |
3.5kg |
350-C-P5-G5-H-S-M-N-P-SN-D-N Feeder Protection Relay
The protection function is robust, covering common faults of feeder lines.
Overcurrent protection is a basic function, but the 350 series offers more detailed implementation. Functions such as inverse-time overcurrent, time-limited overcurrent, zero-sequence overcurrent, and reclosing logic can be enabled flexibly based on the grid structure and operation mode. For cable feeders, it can identify high-resistance grounding faults; for overhead lines, the reclosing function can automatically restore power supply after an instantaneous fault. Not all functions are better; rather, each function can be useful in specific scenarios.
The operation is fast, and the fault isolation is decisive.
The value of the protection relay lies in the few hundred milliseconds when the fault occurs. The hardware platform and algorithm optimization of the 350 series ensure the high-speed process from sampling to criterion calculation and to the trip of the output. For multiple feeder lines operating in parallel, the rapid selective tripping means that non-fault lines remain in power supply without interruption, minimizing the power outage area.
The communication capability keeps pace with the trend of intelligence.
The SN-D-N identification in the model indicates that it is equipped with standard communication interfaces and supports mainstream protocols such as IEC 61850, Modbus, and DNP3. This means that it is not just an independent protection device but a sensing node of the distribution automation system. Remote reading of set values, online viewing of fault waveforms, and receiving dispatch instructions - these functions enable maintenance personnel to avoid visiting the site frequently and instead focus on doing practical work.
Practical Fault Recording
The current and voltage waveforms at the time of the fault, the sequence of switch actions, and the protection action logic will all be recorded. It is not the kind of raw data that can only be viewed but not analyzed, but a complete package with time stamps, trigger conditions, and protection activation information. After the fault is analyzed, to determine the nature of the fault, verify the protection coordination, and clarify the responsibility boundaries, the recording file is the key evidence.
Seamlessly integrated with the GE ecosystem.
If the substation already uses GE's circuit breakers, CT/PT, and communication management machines, the integration of the 350 series relays will be very smooth. The same debugging software, the same engineering language, and the same spare parts channels will be available, and there is no need to rebuild the entire technical system for a new device.
Life cycle cost is controllable.
The purchase price of relays is just a part of it. Subsequent setting value modifications, software upgrades, spare parts replacements, and personnel training are all hidden costs. The software platform of the 350 series is stable, the hardware has a long life cycle, and GE's technical support network covers a wide area. All these together mean that the total cost throughout the life cycle is controllable and predictable.
FAQ
Q: What are the main functions of this model?
A: The main functions include overcurrent protection, grounding fault protection, circuit breaker control, event recording, real-time monitoring, and power system communication functions.
Q: Does GE Multilin 350 support remote monitoring?
A: This relay supports multiple communication protocols and can be connected to SCADA or automation systems to enable remote monitoring and data collection.
Q: Where is this device usually installed?
A: This relay is usually installed in distribution cabinets, control cabinets, or protection panels, and is used to protect the feeders and power equipment.
Q: Which voltage levels of systems is the GE Multilin 350 suitable for?
A: This relay is mainly used in medium and low voltage power distribution systems. The specific voltage level depends on the design of the system.