Why Choose the Mersen NH00AM69V50 NH Fuse-Link?
The Mersen NH00AM69V50 is a compact DIN NH size 00 aM fuse-link designed specifically for short-circuit protection in industrial motor circuits. Rated at 50 A and 690 V AC, it provides strong current-limiting performance to help protect motors, contactors, cables and associated switching equipment against damaging fault currents.
As an aM partial-range fuse-link, the NH00AM69V50 is engineered to tolerate the temporary inrush currents produced during motor starting while interrupting severe short-circuit currents. It must be coordinated with a suitable overload relay or motor protection device because the aM characteristic does not provide full-range overload protection.
The fuse-link features a durable ceramic body, silver-plated copper blade contacts, live gripping lugs and a double fuse-operation indicator. Its standard NH00 dimensions enable installation in compatible NH fuse bases, fuse-switch disconnectors and motor control assemblies.
Key Advantages
- Purpose-designed aM short-circuit protection for motor circuits.
- 50 A rated current for industrial motor applications.
- 690 V AC voltage rating for demanding low-voltage systems.
- 80 kA AC breaking capacity for reliable fault interruption.
- Strong current-limiting performance helps reduce fault energy.
- Double indication system simplifies identification after fuse operation.
Key Features
- Mersen NH aM 690 V fuse-link series.
- DIN NH size 00 construction.
- 50 A rated current.
- 690 V AC rated voltage.
- Partial-range aM operating characteristic.
- Designed for motor circuit short-circuit protection.
- Double fuse-operation indicator.
- Live, non-isolated gripping lugs.
- Silver-plated copper plain-blade terminals.
- Robust ceramic insulating body.
Reliable Short-Circuit Protection for Motor Circuits
Industrial motors can draw several times their normal operating current during starting. The aM characteristic allows these temporary starting currents while providing rapid interruption of severe short-circuit faults. This helps reduce thermal and mechanical stress on motors, cables, contactors and switching equipment.
The Mersen NH00AM69V50 must be used with suitable overload protection because an aM fuse-link is intended for short-circuit protection only. Selection, installation and replacement should be carried out by qualified electrical professionals using compatible NH equipment and an approved fuse-handling device.
Typical Applications
- Industrial motor control centres.
- Direct-on-line motor starter circuits.
- Star-delta motor starter assemblies.
- Contactor and overload relay combinations.
- Pumps, fans and compressor motors.
- Conveyors and material handling systems.
- Industrial machinery and automation equipment.
