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MERSEN FUSE 729P CPASJD 45/50,8.442 160 729PCPASJD45/50,8.442160
Mersen A085583 Limitor aSJB/D high-voltage motor back-up fuse rated at 7.2 kV AC and 160 A, with a 50 kA breaking capacity and integrated 20 N striker.
£601.26
Why Choose the Mersen A085583 High-Voltage Motor Fuse?
The Mersen A085583, catalogue number 45ASD72V160P-3, is a high-performance high-voltage back-up fuse developed specifically for medium-voltage motor protection. Part of the established Mersen Limitor® aSJB/D series, it protects motors, motor pumps, switchgear and associated equipment against damaging short-circuit currents.
This fuse is engineered to withstand the repeated peak currents produced during motor starting while remaining ready to interrupt genuine electrical faults. Its high current-limiting performance helps reduce the thermal and mechanical stress imposed on motors, contactors, cables and switchgear during a short circuit.
With a rated voltage of 7.2 kV AC, a rated current of 160 A and a maximum breaking capacity of 50 kA, the A085583 provides dependable protection in demanding indoor high-voltage installations. A built-in 20 N striker supports mechanical fuse-operation indication and may operate compatible switchgear tripping mechanisms.
Key Advantages
- Specially designed for high-voltage motor protection.
- 7.2 kV AC rated voltage for medium-voltage installations.
- 160 A rated current.
- High 50 kA breaking capacity.
- Withstands repeated peak currents associated with motor starting.
- Integrated 20 N striker for operation indication and tripping.
- High current limitation helps reduce fault energy and equipment stress.
- Low power losses support efficient continuous operation.
Key Features
- Mersen Limitor® aSJB/D back-up fuse-link.
- Manufacturer part number: A085583.
- Catalogue number: 45ASD72V160P-3.
- Rated voltage: 7.2 kV AC.
- Rated current: 160 A.
- Maximum breaking capacity: 50 kA.
- Minimum breaking current: 880 A.
- Fuse dimensions: Approximately 50.8 × 442 mm.
- Indication system: 20 N striker.
- Clip-mounted cylindrical terminal configuration.
Reliable Protection for Medium-Voltage Motors
Medium-voltage motors can draw substantial transient currents during starting. The Mersen A085583 is designed to tolerate these repeated starting peaks without unnecessary operation while providing rapid interruption when a serious short-circuit fault occurs.
Its current-limiting action restricts the peak fault current and energy passed into the protected system. This helps safeguard motors, motor control equipment, cables and switchgear while reducing the potential for costly damage and extended production downtime.
Typical Applications
- Medium-voltage industrial motors.
- High-voltage motor pump protection.
- Motor control centres.
- Indoor medium-voltage switchgear.
- Industrial processing machinery.
- Water treatment and pumping installations.
- Mining, manufacturing and heavy-industry equipment.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 160 A | |
| Voltage | 7200 V | |
| Manufacturer | Mersen | |
| Series | Limitor® aSJB/D | |
| Manufacturer part number | A085583 | |
| Catalogue number | 45ASD72V160P-3 | |
| Product designation | 729P CPASJD 45/50,8.442 160 | |
| Product type | High-voltage motor back-up fuse | |
| Rated voltage | 7.2 kV AC IEC | |
| Rated current | 160 A | |
| Maximum breaking capacity | 50 kA | |
| Minimum breaking current | 880 A | |
| Clearing I²t at rated voltage | 290 kA²s | |
| Power dissipation | 41 W at 0.7 × rated current | |
| Fuse diameter | Approximately 50.8 mm | |
| Fuse length | Approximately 442 mm | |
| Mounting type | Clip mounting | |
| Terminal type | Cylindrical | |
| Terminal material | Silver-plated brass | |
| Body material | Melamine fibreglass | |
| Striker force | 20 N | |
| Operating current type | AC | |
| Approximate weight | 2.2 kg | |
| EAN | 3605340070545 | |
| Compliance | RoHS compliant |
Frequently Asked Questions
What is the Mersen A085583 used for?
The A085583 is a high-voltage back-up fuse designed primarily to protect medium-voltage motors, motor pumps and associated switchgear against short-circuit currents.
What is the voltage rating of the Mersen A085583?
The fuse has an IEC rated voltage of 7.2 kV AC.
What is the rated current of this fuse?
The Mersen A085583 has a rated current of 160 A.
What is the breaking capacity of the A085583?
The fuse has a maximum AC breaking capacity of 50 kA and a minimum breaking current of 880 A.
What does the striker do?
The integrated 20 N striker provides mechanical indication when the fuse operates and can actuate compatible switchgear tripping or signalling mechanisms.
What are the dimensions of the Mersen A085583?
The fuse measures approximately 50.8 mm in diameter and 442 mm in length. It must be installed in compatible high-voltage fusegear.
Trusted High-Voltage Protection from Mersen
Mersen Limitor® high-voltage fuse-links are widely used by motor manufacturers, switchgear builders and industrial engineers to provide dependable short-circuit protection in demanding medium-voltage systems.
