WLDS1 DC Fast Circuit Breaker | Metro & Traction DC Power Protection
WLDS1 DC Fast Circuit Breaker | Metro & Traction DC Power Protection
This is a custom-made product. Please contact us to discuss your specifications and receive a quotation.
Description
WLDS1 DC Fast Circuit Breaker
The WLDS1 is a unipolar, bidirectional DC fast circuit breaker engineered for short-circuit and overload protection in metro, light rail, tram, and industrial electric traction systems. Rated up to DC1800V and 4000A with a rated short-circuit current of 90kA/100ms, it delivers rapid fault interruption — protecting semiconductor rectifiers and traction power infrastructure before damage occurs.
Key Applications
- DC Feeder Traction Power: Protects contact wires and rails against insulation faults and short circuits. Compatible with line fault detection circuits for automatic reclosing.
- Traction Vehicles: Compact design with high shock and vibration resistance — suitable for direct installation in vehicle switchboards.
- Power Semiconductor Equipment: Current-limiting characteristics provide sensitive protection for static converter devices, interrupting fault current before it reaches steady-state values.
- DC Rotating Machinery: Ensures reliable closing during commutation intervals and immediate fault clearance with auto-reclose capability for industrial rolling mills.
Technical Specifications
| Rated Working Voltage | DC900V / DC1800V |
| Maximum Working Voltage | DC1000V / DC2000V |
| Rated Insulation Voltage | DC3000V |
| Rated Current | 4000A / 2500A |
| Rated Short-Circuit Current / Time Constant | 90kA / 100ms |
| Rated Short-Circuit Making Capacity | 128kA |
| Electrical Life | 1,000 operations |
| Mechanical Life | ≥50,000 operations |
| Coil Operating Voltage | DC24V / 48V / 110V / 220V |
| Dimensions (L×W×H) | 756 × 380 × 835 mm |
| Weight | 115 kg |
Product Highlights
- High insulation class — overvoltage category OV4
- Convenient overcurrent trip value setting
- High rated short-circuit making and breaking capacity (128kA)
- Electromagnetic closing, electrical latching — significantly reduced energy consumption
- 5 double-contact auxiliary contacts for versatile application requirements
- Low contact wear and high arc-quenching performance — suitable for C3 (heavy-duty) duty cycle
- High mechanical and electrical life; simple structure, low maintenance
Standards Compliance
- GB/T 25890.1-2010 — Railway Applications: Ground DC Switchgear, Part 1: General
- GB/T 25890.2-2010 — Railway Applications: Ground DC Switchgear, Part 2: DC Circuit Breakers
- GB/T 21413.1/2/3-2008 — Railway Applications: Rolling Stock Electrical Equipment
OEM/ODM available. Contact Wanlong Electric for custom specifications, volume pricing, and technical support.
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.