MERSEN FERRAZ A055D1DSR0-4R Fuse, Medium Voltage, 5500V, 4R, R Rated, DIN Striker

Mersen Ferraz A055D1DSR0-4R fuse is used for circuit protection in industrial applications to safeguard equipment by interrupting excessive current. This Amp-Trap R-rated DIN style fuse is ideal for short-circuit protection in medium voltage motors. It acts as a backup fuse with a minimum interrupting rating, coordinated with overload relays. This R-rated fuse melts within 15 to 35 seconds at 100 times the R rating. This component features silver-plated brass connections for enhanced conductivity, utilising clip terminals, while the insulating body is composed of GMG construction for durability and safety.

Working Mechanism:

• During standard operation, the fuse allows current to pass without interruption.
• In the event of a short circuit, an influx of excessive current occurs.
• The fuse promptly activates its current-limiting mechanism to control the flow.
• Inside the fuse, heat starts to build up within the element due to the high current.
• As the temperature rises, the fuse element gradually melts under the heat's influence.
• Melting of the element leads to the creation of a gap in the circuit, effectively breaking it.

Frequently Asked Questions:

Q. What safety precautions should I take while using this fuse?

A.

• Choose the right fuse rating for your equipment.
• Install the fuse according to guidelines.
• Avoid altering or tampering with the fuse.
• Prevent overloading to avoid blowing the fuse.
• Coordinate with overload protection devices.
• Replace blown fuses promptly with the same type.
• Prevent short circuits in the circuitry.

Q. What factors should I consider while choosing Mersen Ferraz A055D1DSR0-4R fuse?

A.

• Select suitable voltage and current ratings.
• Confirm application for motors or controllers.
• Ensure reliable short-circuit protection.
• Coordinate with overload relays.
• Check for UL component recognition.
• Consider operating environment.

Q. How do I detect a faulty fuse?

A.

• Check visually for a broken or melted element.
• Use a multimeter to measure continuity.
• Test voltage across the fuse terminals.
• Assess circuit functionality despite fuse appearance.