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MERSEN FUSE 729P CPASJD 45/90.442 315 729PCPASJD45/90.442315
Mersen S085622 Limitor aSJB/D DIN high voltage back-up fuse-link for medium voltage motor protection, rated at 7.2 kV AC and 315 A with a 50 kA breaking capacity and 20 N striker.
£939.46
Why Choose the Mersen S085622 High Voltage Motor Protection Fuse?
The Mersen S085622 is a high-performance DIN high voltage back-up fuse-link developed to protect medium voltage motors against damaging short-circuit currents. Part of the established Mersen Limitor® aSJB/D series, it is specifically designed to withstand the repeated peak currents generated during motor starting while providing rapid fault interruption when required.
Manufactured for demanding industrial power systems, the S085622 uses silver-plated copper fuse elements, silver-plated brass terminals and a durable melamine fibreglass body. This robust construction supports reliable electrical performance, effective current limitation and a long operational life in high voltage switchgear and motor control applications.
With a rated voltage of 7.2 kV AC and a rated current of 315 A, the Mersen S085622 is suitable for protecting large medium voltage motors. Its DIN-format construction has an 88 mm diameter, a 442 mm fuse length and an integrated 20 N striker for operation with compatible switchgear tripping or indication mechanisms.
Key Advantages
- Developed specifically for medium voltage motor protection.
- 7.2 kV AC rated voltage for high voltage industrial systems.
- 315 A rated current for compatible motor circuits.
- Withstands repeated peak currents associated with motor starting.
- Current-limiting operation helps reduce damaging short-circuit energy.
- Integrated 20 N striker for switchgear tripping or indication.
- High breaking capacity for demanding electrical installations.
- Robust construction using high-quality conductive and insulating materials.
Key Features
- Mersen Limitor® aSJB/D motor protection fuse series.
- Catalogue number: 45ASD72V315P-3.
- 7.2 kV AC rated voltage.
- 315 A rated current.
- 50 kA maximum AC breaking capacity.
- 88 mm fuse diameter.
- 442 mm DIN fuse length.
- Integrated 20 N striker mechanism.
- Silver-plated copper fuse elements.
- Silver-plated brass cylindrical terminals.
- Melamine fibreglass insulating body.
Reliable Protection for Medium Voltage Motors
Medium voltage motor fuse-links must tolerate the substantial inrush currents produced during motor starting without operating unnecessarily. The Mersen S085622 is designed to support these repeated peak currents while responding rapidly to serious short-circuit faults that could otherwise damage motor windings, cables, contactors and associated switchgear.
As a back-up fuse-link, the S085622 is primarily intended for high-current short-circuit protection and should be coordinated with suitable overload protection. When the fuse operates, its integrated striker can actuate a compatible switchgear trip mechanism or provide an indication that the fuse-link requires replacement.
Typical Applications
- Medium voltage motor protection.
- Industrial motor starters and controlgear.
- Medium voltage motor control centres.
- Mining and quarrying equipment.
- Water and wastewater treatment systems.
- Oil, gas and petrochemical installations.
- Manufacturing and processing plants.
- Utility and infrastructure power systems.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 315 A | |
| Voltage | 7200 V | |
| Manufacturer | Mersen | |
| Series | Limitor® aSJB/D Back-up Fuses | |
| Model | S085622 | |
| Catalogue number | 45ASD72V315P-3 | |
| Product type | DIN high voltage motor protection back-up fuse-link | |
| Primary application | Medium voltage motor protection | |
| Rated voltage | 7.2 kV AC | |
| Rated current | 315 A | |
| Maximum AC breaking capacity | 50 kA | |
| Minimum breaking current | 1,900 A | |
| Total clearing I²t at rated voltage | 2,000 kA²s | |
| Heat dissipation at 0.7 × rated current | 60 W | |
| Fuse diameter | 88 mm | |
| DIN fuse length | 442 mm | |
| Overall product length | 508 mm | |
| Striker force | 20 N | |
| Indication system | Striker | |
| Mounting type | Clip mounting | |
| Terminal type | Cylindrical | |
| Fuse element material | Silver-plated copper | |
| Terminal material | Silver-plated brass | |
| Body material | Melamine fibreglass | |
| Product weight | Approx. 6.1 kg | |
| EAN / UPC | 3605340071054 | |
| RoHS compliant | Yes |
Frequently Asked Questions
What is the Mersen S085622 used for?
The Mersen S085622 is a high voltage back-up fuse-link designed to protect medium voltage motors and associated switchgear against damaging short-circuit currents.
What are the voltage and current ratings?
The fuse-link has a rated voltage of 7.2 kV AC and a rated current of 315 A.
What is the breaking capacity of the S085622?
The Mersen S085622 has a maximum AC breaking capacity of 50 kA.
Does this fuse-link include a striker?
Yes. It incorporates a 20 N striker for operation with compatible switchgear tripping or indication mechanisms.
Is the S085622 suitable for motor overload protection?
The S085622 is a back-up fuse-link intended primarily for high short-circuit current protection. It should be coordinated with suitable overload protection selected for the motor and switchgear installation.
Trusted by Industrial Power Engineers Worldwide
Mersen Limitor® high voltage motor fuse-links are widely specified by switchgear manufacturers, utilities and industrial engineers for dependable short-circuit protection and reliable operation during repeated motor starting cycles.
