Why Choose the Mersen NH1AM69V224 NH Fuse-Link?
The Mersen NH1AM69V224 is a high-performance DIN NH aM fuse-link designed to provide dependable short-circuit protection for motors and motor control circuits in demanding industrial electrical systems. As part of the established Mersen NH aM 690 V fuse-link series, it combines strong current-limiting performance with low power losses and robust construction.
Featuring an aM operating characteristic, this fuse-link is specifically engineered to tolerate the temporary inrush currents generated during motor starting while rapidly interrupting damaging short-circuit currents. As an aM fuse-link provides partial-range protection, it must be used alongside a correctly selected overload relay or motor protection device.
With a rated current of 224 A, a rated voltage of 690 V AC and an 80 kA AC breaking capacity, the NH1AM69V224 is suitable for high-power motor starters, motor control centres, industrial machinery and OEM electrical panels. Its standard NH1 size, double indicator and live gripping lugs support convenient inspection and professional replacement.
Key Advantages
- Purpose-designed aM short-circuit protection for motor circuits.
- 224 A rated current for high-power industrial motors.
- 690 V AC voltage rating for demanding electrical systems.
- 80 kA AC breaking capacity for dependable fault interruption.
- Tolerates normal motor starting currents without unnecessary operation.
- Strong current limitation helps reduce thermal and mechanical fault stress.
- Double indicator enables rapid visual identification of fuse operation.
- Standard NH1 construction for compatible fuse bases and switchgear.
Key Features
- Mersen NH aM 690 V fuse-link series.
- Catalogue number: NH1AM69V224.
- Mersen item number: Q227898.
- 224 A rated current.
- 690 V AC rated voltage.
- aM partial-range motor protection characteristic.
- NH1 fuse size.
- Double visual indication system.
- Live, non-isolated gripping lugs.
- Knife-blade contacts for secure electrical connection.
- 40 mm body width.
- RoHS compliant construction.
Reliable Short-Circuit Protection for Industrial Motors
The Mersen NH1AM69V224 is engineered to interrupt high short-circuit currents while allowing the temporary current peaks associated with motor acceleration. Its current-limiting design reduces the electrical energy passed through the circuit during a fault, helping protect contactors, conductors and other motor control components.
Because the aM characteristic does not provide overload protection, the fuse-link must be coordinated with a suitable thermal overload relay, electronic motor protection relay or motor protection circuit breaker. When correctly selected, these devices provide comprehensive protection for industrial motor circuits.
Typical Applications
- High-power industrial motor starters.
- Motor control centres.
- Contactors and overload relay assemblies.
- Industrial pumps, fans and compressors.
- Conveyor and material handling systems.
- Manufacturing and processing machinery.
- OEM motor control panels.
