SEL relay protection devices from the USA, direct from the SEL manufacturer.
LEHIY item code: LH-SEL-0031
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This page helps you check SEL relay protection devices from the USA, direct from the SEL manufacturer. before you ask for a quote.
Confirm the brand, model number, part number, and quantity. Share a clear nameplate photo when the old item has close variants.
LEHIY can check stock, lead time, packing, shipping documents, and safe replacement options for maintenance orders.
We are a leading authorized distributor of SEL-351A relay protection devices from the USA. We offer direct sourcing from the SEL manufacturer and can provide remote or on-site installation and commissioning services for SEL products.
The product comes with a one-year warranty, original SEL quality certificates and certificates of origin, and inspection upon arrival is supported. Each shipment includes a SEL microprocessor protection device factory test report and an installation driver CD.
For any installation or commissioning issues related to SEL microprocessor protection devices, please contact us!
Our best-selling SEL electromechanical protection device series includes: SEL-551, SEL-551C, SEL-351, SEL-351A, SEL-751A, SEL-710, SEL-387, SEL-749M, etc.
American SEL microcomputer protection device principle: SEL relay protection device is an economical protection device that integrates measurement, control, protection and communication; it is tailored for the high voltage distribution room of the distribution network terminal, with three-stage non-directional current protection as the core, equipped with the monitoring.
and acquisition function of power grid parameters, which can eliminate the need for traditional ammeters, voltmeters, power meters, frequency meters, electricity meters, etc., and can transmit measurement data and protection information to the host computer through the communication port, which is convenient for realizing the automation of the distribution network.
SEL-351A American SEL microcomputer protection device product features: SEL electromechanical protection device is ultra-thin, powerful, well-made, beautiful and cost-effective. In addition to the advantages of microcomputer protection mentioned above, microcomputer protection device has the following characteristics compared with similar products:
- Complete variety: microcomputer protection device has a particularly complete variety, which can meet the various protection requirements of various equipment in various types of substations, which greatly facilitates the design of substations and computer networking.
- The SEL-351A American SEL microcomputer protection device adopts a new chip to improve its technical reliability. The CPU uses 80C196KB, the measurement is a 14-bit A/D conversion, and there are up to 24 analog input circuits. The acquired data is processed by a DSP signal processing chip. High-speed Fourier transform is used to obtain the fundamental to the 8th harmonic. Special software automatic correction ensures high measurement accuracy. By using dual-port RAM and CPU to convert data, a multi-CPU system is formed. Communication is carried out using CAN bus. It has the characteristics of high communication speed (up to 100MHz, generally operating at 80 or 60MHz) and strong anti-interference ability. On-site observation and setting of various protection modes and protection parameters can be conveniently carried out through the keyboard and LCD display unit.
- The hardware design of the SEL-351A American SEL microcomputer protection device adopts special isolation and anti-interference measures in power supply, analog input, switch input and output, communication interface, etc., with strong anti-interference ability. In addition to centralized panel, it can be directly installed on switch cabinet.
- The SEL-351A American SEL microcomputer protection device has rich software functions. In addition to completing various measurement and protection functions, it can complete fault recording (1-second high-speed fault recording and 9-second fault dynamic recording), harmonic analysis and low current grounding line selection functions by cooperating with the upper processing computer.
- It can use RS232 and CAN communication methods, supports multiple remote transmission protocols, and is convenient to connect with various computer management systems.
- It adopts a wide temperature range background 240×128 large screen LCD liquid crystal display, which is easy to operate and has a beautiful display.
- It has high integration, small size and light weight, which is convenient for centralized panel installation and decentralized installation on switch cabinets. We have undertaken a batch of SEL relay protection devices for the Zhejiang Juhua project, including: SEL-351A, SEL-551, SEL-749M and SEL-587.
- SEL-351A: 0351A032X4E65X1 2 units, 10-12 weeks
- SEL-551: 055100CX632X 2 units, 12-14 weeks
- SEL-749M: 0749M01G502X1G 4 units, 18-20 weeks
- SEL-587: 058710C25X2 1 unit, 12-14 weeks
- SEL-351A: 0351A00H24555XX discontinued, replacement model 0351A0H2X4E55X1 1 unit, 10-12 weeks The above prices include 13% VAT and shipping. Invoice included, free shipping via SF Express! Inquiring Unit: Zhejiang Juhua Chemical Materials Co., Ltd. Project Name: Juhua Production (Project No.: 51), Ninghua Production (Project No.: 52) Product Name, Model, and Specifications: (Relay Protection Device\Transmission Line Protection\SEL-351A: 0351A032X4E65X1) 2 sets;
- (Relay Protection Device\Measurement and Control Device\SEL-551: 055100CX632X) 2 sets;
- (Relay Protection Device\Motor Protection\SEL-749M: 0749M01G502X1G10) 4 sets;
- (Relay Protection Device\Main Transformer Differential Protection\SEL-587: 058710C25X2) 1 set;
- (Relay Protection Device\Transmission Line Protection\SEL-351A: 0351A00H24555XX) 1 set. SEL-351A Advantage: relay authorized distributor of SEL protection devices from the US. First-hand source from SEL manufacturer. More popular models: SEL-351, SEL-387: 0387514X5H2X3X1 SEL-551: 0551003X5X1X SEL-351A: 0351A00324553X1 Discontinued: SEL-551, P/N: 0551003X531X SEL-751 - Feeder Protection Relay, PN: SEL-751401A1ACA0X85B610 SEL-710 - Motor Protection Relay, PN: SEL-071001ABA9X71850630
Plain language sourcing guide for SEL relay protection devices from the USA, direct from the SEL manufacturer.
Start with the full model name. Check the brand name. Check the part number. Check the code on the old unit. These small checks help you avoid a wrong order.
Take one clear photo of the front label. Take one photo of the side label. If the part has a cable, plug, port, seal, coil, or screen, take a photo of that area too.
Tell us the quantity you need. Tell us your country. Tell us the date when the plant needs the part. We can then check stock, lead time, safe packing, and the best shipping plan.
If the exact model is no longer made, do not guess. Send the old model and the use case. LEHIY can compare close options and explain which choice is safer for repair work.
Use simple order notes. Write the model in one line. Write the quantity in one line. Write the delivery country in one line. This helps our team reply faster.
Check the old part before removal. Look at the label. Look at the connector. Look at the mounting size. Look at the voltage or pressure rating if it is shown.
Do not rely on a short nickname for a part. Many industrial items have close versions. A small suffix can change the plug, output, range, or software setting.
Ask for a stock check if the plant is stopped. Ask for a lead time if the order is planned. Ask for packing photos if the part is fragile or heavy.
For a replacement order, tell us what failed. Tell us where the part is used. Tell us if an equal model is acceptable. This makes the first answer more useful.
For repeat orders, send the last invoice, old label, or old packing photo. The same reference can help us match the correct product again.
For urgent service, keep the message simple. One model, one quantity, one photo, and one delivery target are enough for a fast first check.
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| Brand Name: | SEL | Certification: | ISO9001, CE |
|---|---|---|---|
| Place of Origin: | China | Condition: | New |
| Warranty: | 1 year | Customized sourcing: | available |
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Ans. LEHIY specializes in industrial automation and control components, offering fast sourcing, stable quality, and competitive prices for global customers.
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Ans. Most items ship within 3-7 days. Customized or rare models may take 10-30 working days.
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Ans. Our main products include PLCs, sensors, valves, solenoid valves, actuators, power modules, transmitters, and complete industrial automation solutions.
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Replacement support
SEL relay protection devices from the USA, direct from the SEL manufacturer.
Send the brand, model, part number, quantity, nameplate photos, and application requirements. LEHIY will check availability, suitable alternatives, packing details, and delivery options before quoting.
For discontinued, temporarily unavailable, or configuration-sensitive items, our team can compare the requested model with close variants or compatible replacements for maintenance and spare parts planning.
Use this page as a practical sourcing note for engineers, buyers, and maintenance teams comparing automation components. Check the model name, brand, LEHIY code, application, and replacement requirements before sending an inquiry.
Short, clear information helps our team confirm availability faster and reduce back-and-forth communication during urgent maintenance projects.
- Confirm the complete model number and any suffix printed on the nameplate.
- Share quantity, destination country, preferred shipping method, and target delivery date.
- Include photos, drawings, old purchase records, or datasheets when compatible alternatives are acceptable.
- Ask for stock checking, replacement comparison, packing details, and export documentation before ordering.
Useful details for a faster quote
- Complete model and part number
- Required quantity and target delivery date
- Nameplate photos, drawings, or old purchase records
- Voltage, signal range, dimensions, or accessory needs
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SEL relay protection devices from the USA, direct from the SEL manufacturer. verification notes
Please send the full model number, quantity, target delivery date, and nameplate photos. These details help us check the requested product or a close replacement.
LEHIY reviews product name, part number, series, label information, and application requirements before shipment.
If the original model is discontinued or supplied with different accessories, we can explain practical differences before quoting.
For repeat purchasing, we can help organize related models, replacement parts, shipment schedules, and clear communication for your team.
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