Description
Overview
The Eaton Bussmann 63KO7-660 is a bolted-type BS88 Part 2 fuse link rated 63A at 660/690V AC, belonging to the Bussmann KO7 series. Classified as Class gG, it provides full-range overcurrent protection for cables, busbars, and distribution equipment in low voltage systems up to 690V AC. With an 80 kA breaking capacity and IEC 60269-2 compliance, this fuse link meets the stringent protection demands of industrial switchgear and power distribution across India.
Key Features
- Class gG Full-Range Protection — Protects against both overloads and short-circuit currents across the full operating range without requiring a backup fuse.
- 80 kA Breaking Capacity — Handles high prospective fault currents found in industrial MV/LV distribution systems, ensuring safe interruption without damage to surrounding equipment.
- 660/690V AC Voltage Rating — Suitable for both 660V and 690V AC supply systems commonly deployed in Indian industrial plants and panel boards.
- Bolted Connection Type — Provides a secure, low-resistance electrical connection ideal for high-current bolted fuse bases in switchgear assemblies.
- BS Size A3 with Closed Slot Tag — Dimensionally standardised for drop-in replacement into existing BS88 fuse holders and bases rated for A3 size.
- IEC 60269-2 and BS88 Part 2 Compliant — Meets internationally recognised low voltage fuse standards, accepted by inspection bodies and OEMs across India and globally.
- CE Marked and RoHS Compliant — Ready for export projects and installations requiring environmental compliance and CE declaration of conformity.
- IEC Certified — Third-party IEC rating gives panel builders and consultants confidence in the fuse link’s performance under standardised test conditions.
- Bussmann KO7 Series Reliability — Part of a well-established Eaton Bussmann product family with proven field history in motor control centres and distribution boards worldwide.
Technical Specifications
| Specification | Value |
|---|---|
| Catalog Number | 63KO7-660 |
| Series | Bussmann KO7 |
| Product Type | BS88 Low Voltage Fuse Link |
| Connection Type | Bolted |
| BS Size | A3 |
| Tag Type | Closed Slot |
| Amperage Rating | 63 A |
| Rated Voltage (AC) | 660/690 V AC |
| Breaking Capacity | 80 kA |
| Fuse Class | Class gG |
| Standard | BS88 Part 2 / IEC 60269-2 |
| Compliances | CE Marked, RoHS Compliant |
| Certifications | IEC Rated |
| Application | General purpose circuit protection — low voltage switchgear panels, motor control centres, distribution boards |
Applications & Selection Guide
The 63KO7-660 fuse link is the right choice for general-purpose overcurrent protection in low voltage distribution systems operating at 660V or 690V AC. It is well-suited for outgoing feeder circuits in LV switchgear panels, busbar protection in distribution boards, and incomer protection in motor control centres where fault levels can reach 80 kA. The closed slot bolted tag format ensures it fits securely into standard BS88 A3 fuse bases without additional adapters.
Class gG fuses are designed to protect cables and conductors against both sustained overloads and short-circuit faults. Unlike motor-rated gM fuses, gG fuses are selected for general distribution circuits — cable feeders, busbar risers, capacitor bank protection, and sub-distribution panels. When sizing, ensure the fuse rating does not exceed the cable’s current-carrying capacity and that the 80 kA breaking capacity meets or exceeds the prospective short-circuit current (PSCC) at the point of installation.
Across India, this fuse link is widely used in industries such as textiles, automotive manufacturing, cement plants, steel processing, chemical plants, and infrastructure projects in Tamil Nadu, Maharashtra, Gujarat, and Telangana. Panel builders and EPC contractors in Coimbatore and across South India rely on the BS88 KO7 series for its consistency and availability through Shansen Enterprises.
Why Buy from Shansen Enterprises?
- Authorized Eaton Channel Partner based in Coimbatore, Tamil Nadu
- 100% genuine Eaton Bussmann products supplied with full manufacturer warranty
- Pan-India delivery — fast dispatch to all major cities and industrial zones
- WhatsApp technical support for product selection, sizing, and compatibility queries
- Bulk and project pricing available for panel builders, contractors, and OEMs
Compatible Products & Accessories
- BS88 A3 Bolted Fuse Bases — matching fuse holders for the 63KO7-660 in switchgear panels
- Eaton Bussmann BS88 Fuse Links — other ampere ratings in the KO7-660 series (e.g., 32A, 40A, 50A, 80A, 100A) for feeder coordination
- Eaton Bussmann Fuse Carriers — DIN-rail or bolted carriers compatible with BS88 A3 size
- Eaton Low Voltage Switchgear & Distribution Boards — compatible panel assemblies accepting BS88 fuse links
- Fuse Monitoring and Blown-Fuse Indicators — for remote indication in unmanned distribution substations
Frequently Asked Questions
What does Class gG mean for the 63KO7-660 fuse link?
Class gG stands for general-purpose full-range fuse. It means the fuse is capable of interrupting all currents from the minimum fusing current (overload region) up to the maximum rated breaking capacity of 80 kA. This makes the 63KO7-660 suitable for protecting cables, distribution busbars, and feeder circuits without requiring a separate backup fuse for short-circuit protection.
Is the 63KO7-660 suitable for use on 690V AC systems in India?
Yes. The 63KO7-660 is dual-rated at 660/690V AC, making it compatible with both 660V and 690V supply systems. In India, 690V systems are increasingly used in industrial applications such as variable frequency drives and large motor starters, and this fuse link is fully rated for those voltages per IEC 60269-2 and BS88 Part 2.
What fuse base or holder is compatible with the 63KO7-660?
The 63KO7-660 requires a BS88 Part 2 fuse base rated for A3 size with a closed slot bolted tag arrangement. Confirm that the fuse base is rated for at least 660/690V AC and 63A. Eaton Bussmann and other manufacturers produce compatible A3 bolted bases for this fuse link. Contact Shansen Enterprises for assistance identifying the correct matching base for your panel design.
What is the breaking capacity of the 63KO7-660 and why does it matter?
The 63KO7-660 has a rated breaking capacity of 80 kA. This is the maximum prospective fault current the fuse can safely interrupt without rupturing or causing secondary damage to the panel or switchgear. Before selecting this fuse, verify that the prospective short-circuit current (PSCC) at the installation point does not exceed 80 kA. For most industrial LV distribution boards in India, 80 kA is sufficient for protection up to the main incomer level.
Does the 63KO7-660 carry CE and RoHS compliance for export or government projects?
Yes. The 63KO7-660 is CE Marked and RoHS Compliant, making it acceptable for projects that require environmental compliance declarations or CE conformity documentation. It is also IEC Rated, which satisfies the requirements of most Indian government tenders, EPC contracts, and export panel assemblies destined for European or Middle Eastern markets.
How do I order the Eaton Bussmann 63KO7-660 from Shansen Enterprises?
You can request a quote directly from Shansen Enterprises by clicking the WhatsApp button on this page or sending an email through the enquiry form. Please mention the catalog number 63KO7-660, the quantity required, and your delivery location. Shansen Enterprises supplies this fuse link across India with fast dispatch from Coimbatore, Tamil Nadu. Bulk orders for panel builders and contractors are welcome, and our technical team can assist with selection or cross-referencing if needed.
