Why Choose the Mersen NH1AM69V50 NH Fuse-Link?
The Mersen NH1AM69V50 is a high-performance DIN NH aM low voltage fuse-link designed to provide reliable short-circuit protection for motors, motor starters and industrial power circuits. Manufactured by Mersen, this NH1 fuse-link is engineered for motor applications where high starting currents must be tolerated without unnecessary fuse operation.
Part of the trusted Mersen NH aM 690 V AC fuse-link series, the NH1AM69V50 features a 50 A current rating, 690 V AC operating voltage and an 80 kA AC breaking capacity. Its partial-range aM characteristic provides effective short-circuit protection whilst allowing normal motor starting currents to pass.
The NH1AM69V50 incorporates a double indicator, live gripping lugs and silver-plated copper blade contacts. Its robust ceramic body and standard NH1 construction make it suitable for compatible NH fuse bases installed within motor control centres, industrial switchboards and machinery control panels.
Key Advantages
- Purpose-designed aM fuse-link for motor circuit protection.
- 50 A rated current for industrial motor applications.
- 690 V AC operating voltage for demanding electrical systems.
- Strong current-limiting performance helps reduce fault stresses.
- Designed to tolerate normal motor starting currents.
- 80 kA AC breaking capacity for reliable fault interruption.
- Double indicator helps identify an operated fuse-link quickly.
- Live gripping lugs support removal using an approved NH fuse puller.
Key Features
- Mersen NH aM 690 VAC fuse-link series.
- Catalogue number: NH1AM69V50.
- Mersen item number: H227891.
- Fuse size: NH1.
- Rated current: 50 A.
- Rated voltage: 690 V AC.
- aM utilisation category for motor short-circuit protection.
- 80 kA maximum AC breaking capacity.
- Double operated-fuse indicator.
- Live gripping lugs.
- Silver-plated copper blade contacts.
- Ceramic insulating body.
Reliable Protection for Industrial Motor Circuits
The Mersen NH1AM69V50 is engineered to protect motor circuits against damaging short-circuit currents. Its aM operating characteristic allows it to withstand the temporary current peaks produced when industrial motors start, whilst providing rapid interruption when a serious fault occurs.
As an aM partial-range fuse-link, the NH1AM69V50 does not provide overload protection on its own. It must be coordinated with a correctly selected overload relay, motor protection circuit breaker or equivalent protective device to provide complete motor circuit protection.
Typical Applications
- Industrial motor control centres.
- Direct-on-line motor starters.
- Star-delta starter assemblies.
- Pump, fan and compressor systems.
- Conveyors and material-handling machinery.
- OEM machinery and automated production equipment.
