1. Overview
Product Positioning: It is a high-voltage and low-voltage hybrid fuse, suitable for short-circuit protection in power distribution networks, substations, and large-scale industrial installations.
Technical Standards: Complies with IEC 60269‑1/2, UL 248‑8 (Class J), as well as ABB's proprietary safety and reliability certifications.
2. Main Technical Parameters
Rated Voltage: 1000 V DC / 690 V AC
Rated Current: 320 A (the "320" in the model indicates the rated current)
Breaking Capacity: 10 kA (for instantaneous short circuits)
Dimensions: 10 × 38 mm (standard Mini‑FPR specification)
Enclosure Protection Rating: IP20 (dust-proof and drip-proof)
Operating Temperature Range: –25 °C ~ +85 °C
Service Life: Approximately 20 years (maintenance-free service life)
3. Product Features
Fast Fusing: Adopts high-performance fuse element material to achieve high-current interruption within 0.1 s.
Low Residual Voltage: After fusing, the residual voltage is ≤ 10 V, ensuring the safety of downstream equipment.
Modular Structure: Can be directly mounted on standard DIN rails or bus ducts, facilitating on-site replacement.
High Reliability: Features moisture-proof and dust-proof design, suitable for harsh industrial environments.
Easy Detection: The enclosure is transparent or equipped with an indicator light, enabling quick identification of whether the fuse is blown.
4. Structure and Composition
Enclosure: High-strength polymer or metal enclosure, providing mechanical protection.
Fuse Element Assembly: Removable fuse element cartridge, filled with high-conductivity alloy wire inside.
Terminals: Screw-type or spring-type terminals, compatible with wires of 0.5 mm²-6 mm².
Indicator Device: Fusing indicator light or color mark, facilitating quick on-site judgment.
5. Typical Application Fields
Power Distribution: Protection for the low-voltage side of substations, power distribution cabinets, and busbars.
Industrial Automation: Front-end protection for large motors, frequency converters, and servo systems.
Building Facilities: Protection for critical loads such as building power distribution, UPS, and fire pumps.
Transportation Facilities: Short-circuit protection for rail transit and airport power supply systems.
6. Installation Key Points
Confirm Voltage and Current: Ensure that the selected model matches the rated voltage and current of the system.
Wiring Method: Use screw or spring terminals; wire connection must be done after power is cut off, and ensure the wire cross-sectional area complies with specifications.
Fixing Method: Can be directly clipped into DIN rails or fixed in bus ducts using bolts.
Check Polarity: For DC systems, the positive and negative wiring directions must be confirmed.
On-Site Testing: After power is turned on, check the indicator light or use a multimeter to confirm no leakage current.
7. Maintenance and Overhaul
Regular Inspection: Inspect the integrity of the enclosure, the tightness of terminals, and the status of indicator lights every 6 months.
Fuse Element Replacement: After fusing, replace the entire fuse element assembly directly without disassembling the enclosure.
Cleaning: Use a dry soft cloth to remove dust; do not use corrosive cleaning agents.
Recording: Record the time, cause, and on-site current value after each replacement or overhaul to facilitate subsequent trend analysis.
Xingruijia focuses on providing ABB industrial automation full range product services and your intelligent control solution partner
If you would like to learn more about our products and services, please feel free to contact us at any time!
Sales Manager : Jinny
Email : sales1@xrjdcs.com
Whatsapp/Mobile:+86 15359273791
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