Why Choose the Mersen Z077854 Potential Transformer Fuse?
The Mersen Z077854, also designated FR20GF72C3,15, is a cylindrical medium-voltage fuse-link designed to protect potential transformers, voltage transformers and other low-power medium-voltage circuits against damaging short-circuit currents. Its current-limiting performance helps interrupt electrical faults rapidly while reducing thermal and mechanical stress on protected equipment.
Manufactured by Mersen, formerly known as Ferraz Shawmut, the Z077854 combines a durable insulating body with metallic end contacts for dependable operation in compatible medium-voltage fuse holders. Its specialised GLF operating characteristic makes it suitable for instrumentation, metering and auxiliary circuits where reliable low-current protection is required.
With a rated voltage of 7.2 kV AC, a rated current of 3.15 A and a cylindrical 20 × 190 mm format, the Mersen Z077854 provides compact and effective protection for medium-voltage equipment. The fuse-link is also identified by the catalogue designation 7200 CP GLF 20.190 3,15.
Key Advantages
- Reliable medium-voltage short-circuit protection.
- 7.2 kV AC rated voltage for medium-voltage electrical systems.
- 3.15 A rated current for low-power circuits and instrument transformers.
- Current-limiting operation helps reduce damaging fault energy.
- Compact 20 × 190 mm cylindrical construction.
- Suitable for compatible medium-voltage fuse bases and holders.
Key Features
- Mersen medium-voltage potential transformer fuse.
- Manufacturer part number Z077854.
- Product designation FR20GF72C3,15.
- Catalogue designation 7200 CP GLF 20.190 3,15.
- 7.2 kV AC rated voltage.
- 3.15 A rated current.
- GLF fuse characteristic.
- 20 mm diameter and 190 mm nominal length.
- Current-limiting technology for rapid fault interruption.
- Designed for voltage transformer and instrumentation circuits.
Potential transformers and voltage transformers provide reduced-voltage signals for metering, monitoring and protection equipment. An internal fault or downstream short circuit can expose these components and associated switchgear to damaging levels of current.
The Mersen Z077854 responds to excessive fault current by operating its internal fuse element and interrupting the circuit. Its current-limiting action restricts both the magnitude and duration of the fault, helping protect transformer windings, conductors, metering equipment and the wider electrical installation.
Typical Applications
- Potential transformer protection.
- Voltage transformer circuits.
- Medium-voltage metering systems.
- Measurement and instrumentation circuits.
- Auxiliary circuits within medium-voltage switchgear.
- Industrial and utility power distribution equipment.
