ST420B1-1 Microprocessor Line Protection Relay | Feeder Circuit Protection
ST420B1-1 Microprocessor Line Protection Relay | Feeder Circuit Protection
This is a custom-made product. Please contact us to discuss your specifications and receive a quotation.
Description
ST420B1-1 Microprocessor Line Protection Relay — Feeder Circuit Protection
The Wanlong Electric ST420B1-1 is a microprocessor-based line protection relay with integrated protection body and display module, engineered for reliable feeder circuit protection in low voltage switchgear and power distribution systems.
Key Features
- Integrated Design — Protection body and display module in one compact unit
- Microprocessor-Based — High-speed, accurate protection logic with digital signal processing
- Feeder Circuit Protection — Overcurrent, short circuit, and ground fault protection for feeder circuits
- Zero-Sequence CT Included — Dedicated zero-sequence current transformer for sensitive ground fault detection
- Wide Frequency Support — 50Hz and 60Hz rated frequency
- OEM/ODM Available — Custom configurations from Suzhou manufacturer
Technical Specifications
- Type: 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 feeder circuit protection
- Industrial power distribution boards
- Motor control centers (MCC) feeder protection
- Commercial and industrial building power 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.