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MERSEN FUSE H 2409UP BCKUP T442-56/50 45DB240V50PT
Mersen Q1000146 Limitor-PT high voltage DIN back-up fuse rated 24 kV AC, 50 A with controlled power dissipation and 80 N striker for transformer protection.
£90.64
Why Choose the Mersen Q1000146 High Voltage Transformer Protection Fuse?
The Mersen Q1000146 is a premium high voltage DIN back-up fuse-link developed for reliable transformer protection in medium voltage distribution systems. Manufactured as part of the Mersen Limitor®-PT series, it is designed to protect transformers against damaging short-circuit currents whilst providing dependable performance in industrial and utility applications.
This fuse-link features controlled power dissipation (CPD), allowing improved thermal management inside enclosed switchgear. Constructed using pure silver fuse elements, silver-plated copper end caps and a high-strength ceramic body, it delivers excellent electrical performance and long service life under demanding operating conditions.
Rated at 24 kV AC with a 50 A current rating, the Q1000146 incorporates an integrated 80 N striker for operation of compatible indication and switching mechanisms. Its 56 mm diameter and 442 mm body length make it suitable for compatible DIN medium voltage switchgear and transformer installations.
Key Advantages
- Designed specifically for high voltage transformer protection.
- 24 kV AC rated voltage.
- 50 A rated current.
- Controlled Power Dissipation (CPD) design reduces thermal loading.
- Integrated 80 N striker for fault indication and switchgear operation.
- Current-limiting performance helps minimise fault energy.
- Manufactured using premium ceramic and pure silver components.
- Complies with IEC 60282-1 requirements for back-up fuses.
Key Features
- Mersen Limitor®-PT high voltage DIN back-up fuse.
- Catalogue number: 45DB240V50PT.
- Rated voltage: 24 kV AC.
- Rated current: 50 A.
- Breaking capacity: 63 kA.
- Fuse diameter: 56 mm.
- Fuse body length: 442 mm.
- Integrated 80 N striker.
- Controlled power dissipation construction.
- RoHS compliant.
Reliable Protection for Medium Voltage Transformers
High voltage back-up fuse-links rapidly interrupt high fault currents before they can damage transformers, switchgear and associated distribution equipment. Their current-limiting characteristics reduce thermal and mechanical stress whilst improving overall system reliability.
The Mersen Q1000146 combines proven Limitor® technology with controlled power dissipation and an integrated striker, making it suitable for medium voltage transformer installations where dependable protection and coordinated switching are essential.
Typical Applications
- Medium voltage transformer protection.
- Electrical substations.
- Industrial switchgear.
- Utility power distribution.
- Renewable energy installations.
- Ring main units.
- OEM medium voltage equipment.
- Industrial power networks.
Technical Specifications
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| Voltage | 240 V | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 50 A | |
| Manufacturer | Mersen | |
| Series | Limitor®-PT | |
| Model | Q1000146 | |
| Catalogue number | 45DB240V50PT | |
| Product type | High voltage DIN back-up fuse-link | |
| Primary application | Transformer protection | |
| Rated voltage | 24 kV AC IEC | |
| Rated current | 50 A | |
| Breaking capacity | 63 kA | |
| Current type | AC | |
| Fuse body diameter | 56 mm | |
| Fuse body length | 442 mm | |
| Striker force | 80 N | |
| Construction | Ceramic body with pure silver fuse elements | |
| EAN | 3605340453195 | |
| Standard | IEC 60282-1 | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen Q1000146 used for?
The Mersen Q1000146 is a high voltage DIN back-up fuse-link designed to protect medium voltage transformers from damaging short-circuit currents.
What are the voltage and current ratings?
The fuse is rated at 24 kV AC with a continuous current rating of 50 A.
Does this fuse include a striker?
Yes. It incorporates an integrated 80 N striker for operating compatible indication or switching mechanisms.
What size is the fuse?
The fuse-link has a 56 mm diameter and a 442 mm body length.
What does controlled power dissipation provide?
Controlled power dissipation helps manage operating temperatures inside switchgear, improving long-term reliability and thermal performance.
Trusted by Utilities and Switchgear Manufacturers Worldwide
Mersen Limitor® high voltage fuse-links are trusted worldwide by utilities, OEMs and switchgear manufacturers for dependable transformer protection in medium voltage electrical distribution systems.
