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MERSEN FUSE H 1209UP BCKUP T VDE292-56/25 W1000266
Mersen W1000266 Limitor-PTD high voltage DIN back-up fuse-link with controlled power dissipation, rated at 12 kV AC and 25 A for transformer protection in medium voltage electrical distribution systems.
£72.04
Why Choose the Mersen W1000266 Limitor®-PTD High Voltage Back-up Fuse?
The Mersen W1000266 is a premium Limitor®-PTD high voltage DIN back-up fuse-link with controlled power dissipation, specifically engineered to protect medium voltage transformers in demanding electrical distribution systems. Designed in accordance with IEC 60282-1 and VDE 0670 T402, it delivers rapid interruption of high fault currents while minimising thermal stress on connected equipment.
Part of the trusted Mersen Limitor®-PTD series, the W1000266 features pure silver fuse elements, silver-plated copper end caps and a robust ceramic body for exceptional electrical performance and long operating life. Its integrated 80 N thermal striker provides reliable operation with compatible air and gas insulated switchgear, making it a preferred choice for modern transformer protection systems.
With a rated voltage of 12 kV AC, a 25 A current rating and a 56 mm × 292 mm DIN format, the W1000266 is ideally suited for industrial substations, utility networks and medium voltage transformer installations where dependable protection is essential.
Key Advantages
- Designed for reliable medium voltage transformer protection.
- Controlled power dissipation technology helps reduce thermal stress.
- 12 kV AC voltage rating for medium voltage distribution systems.
- 25 A current rating suitable for transformer primary protection.
- Integrated 80 N thermal striker for dependable switchgear operation.
- Manufactured to IEC 60282-1 and VDE 0670 T402 standards.
Key Features
- Mersen Limitor®-PTD back-up fuse-link.
- Catalogue number: 45DB120V25PTD.
- Rated voltage: 12 kV AC.
- Rated current: 25 A.
- Breaking capacity: 63 kA.
- Fuse dimensions: 56 mm diameter × 292 mm.
- Thermal striker: 80 N.
- Controlled power dissipation (PTD) design for enhanced transformer protection.
Reliable Protection for Medium Voltage Transformers
Medium voltage back-up fuse-links protect transformers by rapidly interrupting damaging fault currents before equipment can be exposed to excessive thermal or mechanical stress. This helps improve network reliability while reducing maintenance costs and equipment downtime.
The Mersen Limitor®-PTD range combines controlled power dissipation with dependable fault interruption, making it particularly well suited to modern air insulated and gas insulated switchgear used throughout industrial and utility power distribution networks.
Typical Applications
- Medium voltage transformer protection.
- Industrial substations.
- Gas insulated switchgear (GIS).
- Air insulated switchgear.
- Utility power distribution networks.
- Industrial electrical infrastructure.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 25 A | |
| Voltage | 12000 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-PTD | |
| Model | W1000266 | |
| Catalogue number | 45DB120V25PTD | |
| Product type | High voltage DIN back-up fuse-link | |
| Rated voltage | 12 kV AC | |
| Rated current | 25 A | |
| Frequency | 50 / 60 Hz | |
| Breaking capacity | 63 kA | |
| Minimum breaking current | 95 A | |
| Fuse dimensions | Ø56 × 292 mm | |
| Striker | 80 N thermal striker | |
| Construction | Ceramic body with pure silver fuse elements and silver-plated copper terminals | |
| Standards | IEC 60282-1, VDE 0670 T402 | |
| Weight | Approx. 1.7 kg | |
| HS Code | 85351000 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen W1000266 used for?
The W1000266 is a high voltage DIN back-up fuse-link designed to protect medium voltage transformers against high fault currents.
What voltage is this fuse rated for?
This fuse is designed for systems operating at 12 kV AC.
What is the current rating?
The Mersen W1000266 has a 25 A rated current.
What is controlled power dissipation?
Controlled power dissipation helps manage heat generated during normal operation, improving compatibility with modern enclosed switchgear and transformer installations.
Does this fuse include a striker?
Yes. It includes an integrated 80 N thermal striker for reliable operation with compatible switchgear mechanisms.
Trusted by Electrical Engineers Worldwide
Mersen Limitor®-PTD high voltage fuse-links are trusted by utilities, switchgear manufacturers and industrial engineers for dependable transformer protection, controlled thermal performance and reliable fault interruption in demanding medium voltage installations.
