ST420H Microprocessor Line Protection Relay | Advanced Feeder Protection
ST420H Microprocessor Line Protection Relay | Advanced Feeder Protection
This is a custom-made product. Please contact us to discuss your specifications and receive a quotation.
Description
ST420H Microprocessor Line Protection Relay — Advanced Feeder Protection
The Wanlong Electric ST420H series is an advanced microprocessor-based line protection relay featuring integrated protection body and display module. Designed for demanding feeder circuit protection applications requiring enhanced protection logic and reliability.
Key Features
- Advanced Protection Logic — Enhanced microprocessor-based algorithms for faster, more accurate fault detection
- Integrated Design — Protection body and display module combined in one unit
- Zero-Sequence CT Included — Sensitive ground fault detection via dedicated zero-sequence current transformer
- Wide Frequency Support — 50Hz and 60Hz rated frequency
- Reliable & Compact — Suitable for panel board and switchgear installation
- OEM/ODM Available — Custom configurations from Suzhou manufacturer
Technical Specifications
- Model: ST420H1 / ST420H2
- Type: Advanced microprocessor line protection relay
- Rated Voltage: Below 1kV
- Rated Frequency: 50Hz / 60Hz
- Accessories Included: Current transformer (CT), zero-sequence current transformer
- Display: Integrated display module
- Manufacturer: Wan Long Electric Group Co., Ltd., Suzhou, China
Applications
- Low voltage switchgear advanced feeder protection
- Industrial power distribution boards requiring enhanced relay functionality
- Motor control centers (MCC) with critical feeder circuits
- Substations and power distribution systems
Contact Wanlong Electric for technical datasheets, wiring diagrams, or OEM inquiries.
Care
To maintain the beauty and integrity of your purchase, we recommend treating it with care. Simple maintenance practices, such as gentle washing and proper storage, can effectively preserve the longevity of your favorites. We encourage you to refer to the care instructions included with each item, designed to help you keep your purchase in top condition.
Design
Our dedication to excellence extends beyond materials; it encompasses the artistry and craftsmanship illustrated in every piece we create.