Why Choose the Mersen V1000150 High Voltage DIN Back-up Fuse?
The Mersen V1000150 is a premium Limitor®-PT high voltage DIN back-up fuse designed to provide dependable transformer protection in medium voltage electrical systems. Also identified by catalogue number 45DB240V125PT, this fuse incorporates Controlled Power Dissipation (CPD) technology to reduce thermal ageing whilst maintaining exceptional fault protection. It is manufactured in accordance with IEC 60282-1 and is intended for demanding utility, OEM and industrial power distribution applications.
Manufactured using a ceramic body, pure silver fuse elements and silver-plated copper end caps, the V1000150 delivers excellent electrical performance, low long-term power dissipation and outstanding operational reliability. The integrated 80 N thermal striker enables operation of compatible switchgear mechanisms or remote indication systems, helping improve maintenance efficiency and system safety.
With a 24 kV AC rated voltage, 125 A rated current and a large 88 mm diameter × 442 mm length DIN format, the Mersen V1000150 is ideally suited to transformer protection within substations, switchgear and industrial medium voltage distribution systems.
Key Advantages
- Designed specifically for high voltage transformer protection.
- 24 kV AC IEC rated voltage.
- 125 A rated current.
- Controlled Power Dissipation (CPD) technology extends service life.
- Integrated 80 N thermal striker for indication and switch operation.
- High breaking capacity ensures dependable short-circuit interruption.
Key Features
- Mersen Limitor®-PT series.
- Catalogue number: 45DB240V125PT.
- 24 kV AC IEC voltage rating.
- 125 A rated current.
- Controlled Power Dissipation (CPD).
- 80 N thermal striker.
- DIN fuse size 88 mm × 442 mm.
- Manufactured to IEC 60282-1 standards.
The Limitor®-PT series combines rapid short-circuit interruption with Controlled Power Dissipation technology, helping reduce thermal ageing whilst maintaining dependable protection throughout the operational life of the transformer. These fuses are widely used in medium voltage switchgear, substations and utility distribution systems.
Its integrated thermal striker enables compatible switchgear or indication devices to operate automatically when the fuse clears a fault, supporting improved safety, reduced downtime and faster maintenance response.
Typical Applications
- Distribution transformer protection.
- Medium voltage substations.
- High voltage switchgear.
- Industrial electrical distribution systems.
- Utility power networks.
- Ring main units and transformer feeders.
