Why Choose the Mersen NH1AM69V25 NH Fuse-Link?
The Mersen NH1AM69V25 is a premium DIN NH size 1 aM fuse-link engineered specifically for short-circuit protection of industrial motor circuits. Rated at 25 A with a maximum operating voltage of 690 V AC, it provides reliable current-limiting protection for motors, contactors, cables and associated switching equipment operating in demanding industrial environments.
Featuring an aM partial-range operating characteristic, the NH1AM69V25 is designed to withstand the temporary high inrush currents produced during motor starting while rapidly interrupting severe short-circuit faults. As an aM fuse-link, it should always be coordinated with an appropriate overload relay or motor protection device, as overload protection is not provided by the fuse itself.
The fuse-link incorporates a ceramic body, silver-plated blade contacts, non-isolated live gripping lugs and a double fuse-operation indicator. Its DIN NH size 1 construction allows straightforward installation into compatible NH fuse bases and fuse-switch disconnectors used throughout industrial motor control systems.
Key Advantages
- Purpose-designed aM short-circuit protection for motor circuits.
- 25 A rated current for industrial motor applications.
- 690 V AC operating voltage.
- 80 kA breaking capacity for dependable fault interruption.
- Allows normal motor starting currents without nuisance operation.
- Double indication system enables rapid fuse status identification.
Key Features
- Mersen NH aM 690 V fuse-link series.
- DIN NH size 1.
- 25 A rated current.
- 690 V AC rated voltage.
- Partial-range aM operating characteristic.
- Designed for motor circuit short-circuit protection.
- Double blown-fuse indicator.
- Live, non-isolated gripping lugs.
- Silver-plated blade contacts.
- Ceramic insulating body.
Reliable Short-Circuit Protection for Motor Circuits
Industrial motors generate high starting currents that can exceed several times their normal operating current. The aM operating characteristic is specifically designed to tolerate these temporary currents while providing rapid interruption of damaging short-circuit faults, helping protect motors and associated switching equipment.
The NH1AM69V25 is intended for use with coordinated overload protection devices such as thermal overload relays or motor protection relays. Installation and replacement should only be carried out by qualified electrical professionals using approved NH fuse handling equipment.
Typical Applications
- Industrial motor control centres.
- Direct-on-line motor starters.
- Star-delta motor starters.
- Motor protection circuits.
- Pumps, compressors and fan systems.
- Industrial machinery and automation equipment.
- Manufacturing and processing plants.
