Why Choose the Mersen NH3AM69V500 Motor Protection Fuse-Link?
The Mersen NH3AM69V500 is a high-performance NH3 aM fuse-link specifically designed for the short-circuit protection of motors, motor starters and associated electrical equipment. Manufactured to the DIN NH standard, it provides exceptional current-limiting performance whilst safely accommodating the high inrush currents generated during motor starting.
Rated at 500 A and 690 V AC, the NH3AM69V500 forms part of Mersen's aM motor protection range. The aM operating characteristic is intended for short-circuit protection only and should always be used alongside an appropriately selected thermal overload relay or motor protection device to provide complete motor protection.
Featuring live gripping tags, a double visual indicator, silver-plated copper blade contacts and a durable ceramic body, the NH3AM69V500 delivers dependable protection for motor control centres, industrial switchboards and OEM machinery installations.
Key Advantages
- Specialised aM motor circuit protection.
- 500 A rated current for high-power motor applications.
- 690 V AC operating voltage.
- 80 kA AC breaking capacity for dependable fault interruption.
- Excellent current limitation during short-circuit conditions.
- Double indicator provides rapid identification of an operated fuse.
- Live gripping tags for handling with an approved NH fuse puller.
- Designed for use alongside motor overload protection devices.
Key Features
- Mersen NH Fuse-Links aM 690 VAC series.
- NH3 fuse size.
- 500 A rated current.
- 690 V AC rated voltage.
- aM utilisation category.
- 80 kA AC breaking capacity.
- Double blown-fuse indicator.
- Live gripping tags.
- Silver-plated copper blade contacts.
- Ceramic fuse body.
- Body width: 71.9 mm.
- RoHS compliant.
Reliable Short-Circuit Protection for Industrial Motor Circuits
The NH3AM69V500 is designed for high-power motor applications where substantial starting currents occur. Its aM characteristic allows the fuse-link to withstand temporary inrush currents whilst providing rapid interruption during short-circuit faults, helping minimise damage to motors, starters and associated electrical equipment.
As an aM fuse-link provides short-circuit protection only, it should always be combined with a correctly selected overload relay or motor protection device to provide complete protection for the motor installation.
Typical Applications
- Motor control centres.
- Industrial motor starters.
- High-power pumps and compressors.
- Conveyor systems.
- Industrial switchboards.
- OEM machinery.
- HVAC plant.
- Manufacturing automation systems.
