Why Choose the Mersen NH1AM69V80 Motor Protection Fuse-Link?
The Mersen NH1AM69V80 is a high-performance DIN NH aM fuse-link designed to provide short-circuit protection for motors, motor starters and associated industrial power circuits. Its partial-range aM operating characteristic is specifically suited to motor applications, allowing normal motor starting currents while responding rapidly to damaging high fault currents.
As part of Mersen's NH aM 690 V AC fuse-link range, the NH1AM69V80 delivers strong current-limiting performance with low power losses. During a short circuit, it helps reduce the peak current and energy transmitted to contactors, cables and other downstream components, supporting reliable coordination within motor control installations.
Rated at 80 A and 690 V AC, this NH1 fuse-link features live gripping lugs, silver-plated copper blade contacts and a double indication system. Because an aM fuse-link provides short-circuit protection only, it must be used with a suitable overload protection device, such as a motor protection relay or circuit breaker.
Key Advantages
- Specialised aM characteristic for motor circuit protection.
- 80 A rated current for industrial motor applications.
- 690 V AC rated operating voltage.
- High 80 kA AC breaking capacity for dependable fault interruption.
- Current-limiting performance helps reduce stress on motor control equipment.
- Double indicator enables rapid identification of an operated fuse-link.
- Low power dissipation supports efficient operation.
Key Features
- Mersen NH aM 690 V AC fuse-link series.
- DIN NH1 fuse size.
- 80 A rated current.
- 690 V AC rated voltage.
- aM partial-range operating characteristic.
- 80 kA AC breaking capacity.
- Double fuse operation indicator.
- Live gripping lugs.
- Silver-plated copper blade contacts.
- Durable ceramic insulating body.
- 40 mm product width.
Reliable Short-Circuit Protection for Motor Circuits
Motor circuits commonly experience temporary current peaks during starting. An aM fuse-link is designed to tolerate these normal starting currents while providing rapid interruption of severe short-circuit currents. This makes it suitable for coordinated motor starter assemblies containing contactors and separate overload protection.
The Mersen NH1AM69V80 is a partial-range fuse-link and does not provide overload protection. It must therefore be combined with correctly selected overload protection to safeguard the motor and conductors across the complete fault-current range.
Typical Applications
- Industrial motor starter circuits.
- Motor control centres and control panels.
- Contactors with separate overload relays.
- Pumps, fans and conveyor systems.
- Industrial machinery and production equipment.
- NH1 fuse bases and fuse-switch disconnectors.
