Why Choose the Mersen P1000145 Limitor®-PT High Voltage Transformer Fuse?
The Mersen P1000145, catalogue number 45DB240V40PT, is a high-performance DIN high voltage back-up fuse designed to protect medium-voltage transformers against damaging short-circuit currents. As part of the proven Mersen Limitor®-PT range, it combines dependable current-limiting protection with controlled power dissipation for use in high-voltage switchgear and electrical distribution systems.
This fuse-link is manufactured using pure silver fuse elements, silver-plated copper terminals and a robust ceramic body. These high-quality materials provide consistent electrical performance, effective fault interruption and dependable service in demanding industrial, utility and infrastructure applications.
Rated at 40 A and 24 kV AC, the Mersen P1000145 offers a high 63 kA breaking capacity. Its 56 mm diameter DIN format, clip-mounted installation and integrated 80 N striker support reliable operation with compatible switchgear trip and indication mechanisms.
Key Advantages
- Designed specifically for medium-voltage transformer protection.
- 24 kV AC voltage rating for high-voltage IEC systems.
- 40 A rated current for compatible transformer applications.
- High 63 kA breaking capacity for dependable fault interruption.
- Controlled power dissipation supports installation within enclosed switchgear.
- Integrated 80 N striker for tripping and fuse operation indication.
Key Features
- Mersen Limitor®-PT back-up fuse series.
- Catalogue number 45DB240V40PT.
- 40 A rated current.
- 24 kV AC IEC rated voltage.
- 63 kA maximum breaking capacity.
- 130 A minimum interrupting rating.
- 22 kA²s clearing I²t at rated voltage.
- Integrated striker-type indication system.
- Silver-plated copper cylindrical terminals.
- Durable ceramic insulating body.
Medium-voltage transformers require specialised protection capable of limiting severe short-circuit currents before excessive thermal or mechanical damage occurs. The Mersen P1000145 is a current-limiting back-up fuse designed to interrupt high fault currents rapidly while coordinating with additional protective devices within the electrical installation.
The controlled power dissipation design supports efficient operation in enclosed switchgear, while the integrated striker can activate compatible trip mechanisms or signalling devices after the fuse operates. This helps provide safe fault isolation, clear indication and efficient maintenance within medium-voltage systems.
Typical Applications
- Medium-voltage transformer protection.
- High-voltage switchgear and controlgear.
- Electrical substations.
- Industrial power distribution systems.
- Utility transformer installations.
- OEM medium-voltage electrical equipment.
