Why Choose the Mersen A077855 20GF72V4 Medium-Voltage Fuse?
The Mersen A077855, also identified as 20GF72V4, is a compact medium-voltage cylindrical fuse link designed to provide reliable protection for electrical equipment operating at voltages up to 7.2 kV AC. Manufactured by Mersen under its established Ferraz Shawmut range, this fuse combines a 4 A current rating with a cylindrical 20 × 190 mm format.
The A077855 is intended to interrupt damaging fault currents before they can cause excessive thermal or mechanical stress to cables, components and connected equipment. Its current-limiting operation helps reduce the energy allowed through during a fault, supporting effective protection within correctly coordinated medium-voltage systems.
With its compact ferrule-mounted construction, the Mersen A077855 is suitable for compatible fuse holders and specialist equipment where installation space is restricted. Its dependable design makes it a practical replacement fuse for industrial power distribution, controlgear, auxiliary circuits and other medium-voltage electrical applications.
Key Advantages
- Reliable medium-voltage overcurrent protection.
- 7.2 kV AC rated voltage for specialist electrical systems.
- 4 A rated current for low-current medium-voltage circuits.
- Compact 20 × 190 mm cylindrical format.
- Current-limiting operation helps reduce fault energy.
- Manufactured using established Mersen Ferraz Shawmut fuse technology.
Key Features
- Mersen 20GF72V4 fuse link.
- 4 A nominal current rating.
- 7.2 kV AC voltage rating.
- Cylindrical body with ferrule end contacts.
- Designed for compatible medium-voltage fuse holders.
- Single-use protective device for fault interruption.
- Compact construction for specialist electrical equipment.
- Suitable for professional industrial applications.
Dependable Medium-Voltage Circuit Protection
Medium-voltage fuse links protect electrical equipment by interrupting the circuit when fault current exceeds the fuse's operating threshold. Current-limiting designs operate rapidly during severe faults, helping restrict peak current and the total energy passed into downstream equipment.
The Mersen A077855 must be selected and coordinated according to the electrical characteristics of the protected circuit. System voltage, normal operating current, starting or inrush current, minimum interrupting current and the specifications of the associated fuse holder must all be considered before installation.
Typical Applications
- Medium-voltage electrical equipment.
- Industrial power distribution systems.
- Electrical switchgear and controlgear.
- Auxiliary and control circuits.
- Industrial machinery and power equipment.
- Maintenance and replacement fuse applications.
