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MERSEN FUSE H 1209P BCKUP VDE292-56/25 W1000243
Mersen W1000243 Limitor-PD high voltage DIN back-up fuse-link rated at 12 kV AC and 25 A for reliable transformer protection in medium voltage electrical distribution systems.
£68.06
Why Choose the Mersen W1000243 Limitor®-PD High Voltage Back-up Fuse?
The Mersen W1000243 is a premium Limitor®-PD high voltage DIN back-up fuse-link engineered for dependable transformer protection in medium voltage electrical distribution systems. Designed in accordance with IEC 60282-1 and VDE 0670 T402, it provides fast, reliable interruption of high fault currents, helping protect transformers and switchgear from costly damage.
As part of the trusted Mersen Limitor®-PD range, this fuse incorporates high purity silver fuse elements, silver-plated copper terminals and a robust ceramic body for exceptional electrical performance and long service life. The integrated 80 N striker provides reliable indication and operation of compatible switchgear mechanisms.
With a rated voltage of 12 kV AC, a 25 A current rating and a compact 56 mm × 292 mm DIN format, the W1000243 is ideally suited for transformer primary protection within industrial substations, utility networks and medium voltage switchgear.
Key Advantages
- Designed specifically for medium voltage transformer protection.
- Manufactured to IEC 60282-1 and VDE 0670 T402.
- 12 kV AC voltage rating for industrial distribution systems.
- 25 A rated current for transformer primary protection.
- Integrated 80 N striker for dependable switchgear indication.
- Premium ceramic construction with silver fuse elements for long operating life.
Key Features
- Mersen Limitor®-PD back-up fuse-link.
- Catalogue number: 45DB120V25PD.
- Rated voltage: 12 kV AC.
- Rated current: 25 A.
- Breaking capacity: 63 kA.
- Fuse dimensions: 56 mm diameter × 292 mm body.
- Integrated 80 N striker mechanism.
- Suitable for DIN medium voltage switchgear and transformer protection.
Reliable Transformer Protection for Medium Voltage Networks
High voltage back-up fuse-links protect transformers by rapidly clearing high fault currents before they can damage critical electrical equipment. This improves system reliability, enhances operational safety and helps minimise costly downtime across industrial power distribution systems.
The Mersen Limitor®-PD range has been trusted worldwide for decades in substations, transformer installations and medium voltage switchgear, delivering consistent protection and dependable long-term performance.
Typical Applications
- Medium voltage transformer protection.
- Industrial substations.
- Medium voltage switchgear.
- Utility power distribution systems.
- Electrical infrastructure projects.
- Industrial manufacturing facilities.
Technical Specifications
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| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | High voltage | |
| Current | 25 A | |
| Voltage | 12000 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-PD | |
| Model | W1000243 | |
| Catalogue number | 45DB120V25PD | |
| 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 size | Ø56 × 292 mm | |
| Striker | 80 N | |
| Mounting type | DIN clip mounting | |
| Construction | Ceramic body with silver-plated copper terminals | |
| Applicable standards | IEC 60282-1, VDE 0670 T402 | |
| Weight | Approx. 1.6 kg | |
| HS Code | 85351000 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen W1000243 used for?
The W1000243 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 rated for operation on 12 kV AC systems.
What is the current rating?
The Mersen W1000243 has a 25 A rated current.
Does this fuse include a striker?
Yes. It incorporates an integrated 80 N striker for indication and compatible switchgear operation.
Which standards does this fuse comply with?
The fuse is manufactured in accordance with IEC 60282-1 and VDE 0670 T402 requirements for high voltage fuse-links.
Trusted by Electrical Engineers Worldwide
Mersen Limitor®-PD high voltage fuse-links are specified worldwide by utilities, panel builders and industrial engineers for dependable transformer protection, excellent fault interruption performance and long-term reliability in demanding medium voltage installations.
