Why Choose the ABB OFAF3AM500 HRC Fuse Link?
The ABB OFAF3AM500 is a high-performance DIN-type HRC fuse link designed for dependable short-circuit protection of motor circuits in industrial low-voltage electrical systems. With ABB order code 1SCA022698R0440, it forms part of the ABB OFAF aM fuse range and combines high rupturing capacity with a standardised DIN blade format for integration into compatible fuse bases and fuse-switch equipment.
Rated at 500 A and 500 V AC, the OFAF3AM500 uses an aM utilisation category developed for motor protection applications. This characteristic provides short-circuit protection while accommodating the temporary high starting currents associated with electric motors, with separate overload protection normally incorporated into the coordinated motor protection system.
The OFAF3AM500 is a DIN size 3 / NH3 fuse link with dual indication. Its robust HRC construction, 42 W power loss and standardised size 3 format make it suitable for substantial motor feeders, motor control centres and industrial machinery requiring reliable high-current circuit protection.
Key Advantages
- 500 A rated current for high-current industrial motor circuits.
- 500 V AC rated voltage for low-voltage power systems.
- aM fuse characteristic designed for motor-circuit short-circuit protection.
- DIN size 3 / NH3 construction for compatible industrial fusegear.
- Dual indication assists with identification of fuse operation.
- HRC construction provides dependable interruption of high fault currents.
- Designed to tolerate motor starting currents when coordinated with suitable overload protection.
Key Features
- ABB OFAF aM motor-protection fuse range.
- 500 A nominal current rating.
- 500 V AC rated voltage.
- aM utilisation category.
- DIN size 3 / NH3 fuse format.
- Dual fuse indication.
- 42 W power loss.
- DIN blade-contact construction for compatible fusegear.
- Designed for short-circuit protection of industrial motor circuits.
- ABB order code 1SCA022698R0440.
Reliable Short-Circuit Protection for Industrial Motor Circuits
The ABB OFAF3AM500 uses an aM fuse characteristic specifically suited to motor circuits. This type of fuse provides short-circuit protection while allowing the temporary current peaks associated with motor starting, making it suitable for coordinated protection arrangements incorporating a separate overload-protection device.
With its 500 A current rating, 500 V AC voltage rating and DIN size 3 construction, the OFAF3AM500 is suited to demanding industrial motor feeders and control assemblies. Its standardised blade format enables installation in compatible NH3 fuse bases and fuse-switch equipment, while dual indication helps simplify inspection and maintenance.
Typical Applications
- High-current industrial electric motor feeders.
- Motor control centres and industrial switchboards.
- Heavy industrial machinery and production equipment.
- Pumps, fans, compressors and processing machinery.
- Motor starters with coordinated overload protection.
- Fuse-switch disconnectors and compatible NH3 fuse bases.
