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MERSEN FUSE H 729P BCKUP 192-56/25 X209297
Mersen X209297 Limitor-PD high-voltage DIN back-up fuse-link rated at 7.2 kV AC and 25 A, with a 56 mm diameter, 192 mm length and 80 N striker for transformer protection.
£60.54
Why Choose the Mersen X209297 High-Voltage Fuse?
The Mersen X209297, catalogue reference 45DB72V25PD, is a high-voltage DIN back-up fuse-link designed to protect distribution transformers against the damaging thermal and dynamic effects of short-circuit currents. It forms part of the dependable Mersen Limitor®-PD series, developed for high-voltage switchgear, controlgear and power distribution systems.
Rated at 7.2 kV AC and 25 A, this current-limiting fuse-link interrupts high fault currents quickly, helping prevent faults from developing to their maximum prospective peak. Its high breaking capacity, effective current limitation and low switching voltage support reliable transformer protection in demanding electrical installations.
The X209297 features a durable ceramic body, pure silver fuse elements and silver-plated copper end caps. Its standard DIN dimensions of 56 mm diameter × 192 mm length support straightforward clip mounting, while the integrated 80 N medium striker can operate compatible switchgear mechanisms or provide clear fuse-operation indication.
Key Advantages
- Reliable high-voltage transformer protection against short-circuit currents.
- 7.2 kV AC voltage rating for medium- and high-voltage distribution systems.
- 25 A current rating for coordinated transformer protection.
- High breaking capacity and effective current-limiting performance.
- Integrated 80 N medium striker for switchgear operation or indication.
- Robust ceramic construction with high-quality conductive materials.
Key Features
- Mersen Limitor®-PD back-up fuse-link.
- Catalogue number: 45DB72V25PD.
- Rated voltage: 7.2 kV AC.
- Rated current: 25 A.
- Fuse dimensions: 56 mm diameter × 192 mm length.
- Medium striker: 80 N / 30 mm.
- Pure silver fuse elements for consistent electrical performance.
- Silver-plated copper end caps and a durable ceramic body.
- Suitable for indoor and outdoor high-voltage applications.
Reliable Protection for High-Voltage Transformers
Back-up fuse-links such as the Mersen X209297 are intended to interrupt high short-circuit currents that exceed their minimum breaking-current threshold. They are commonly coordinated with transformer protection devices or high-voltage switching equipment to provide comprehensive protection across the required fault-current range.
The current-limiting design helps interrupt a fault before it reaches its full prospective peak, reducing the electrical, thermal and mechanical stresses applied to transformers, cables and switchgear. Coordination with suitable high-voltage equipment is essential to achieve the required level of system protection.
Typical Applications
- High-voltage and medium-voltage transformer protection.
- HV/LV distribution transformer installations.
- Electrical substations and distribution networks.
- High-voltage switchgear and controlgear.
- Industrial power distribution systems.
- Indoor and outdoor transformer enclosures.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage, Miniature | |
| Current | 25 A | |
| Voltage | 7200 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-PD | |
| Item number | X209297 | |
| Catalogue number | 45DB72V25PD | |
| Product type | High-voltage DIN back-up fuse-link | |
| Application | Transformer protection | |
| Rated voltage | 7.2 kV AC | |
| Rated current | 25 A | |
| Current type | AC | |
| Fuse diameter | 56 mm | |
| Fuse length | 192 mm | |
| Striker type | Medium striker | |
| Striker force | 80 N | |
| Striker travel | 30 mm | |
| Body material | Ceramic | |
| Fuse-element material | Pure silver | |
| End-cap material | Silver-plated copper | |
| Mounting type | DIN clip mounting | |
| Standards | IEC 60282-1, VDE 0670 Part 402 and DIN 43625 | |
| Compliance | RoHS compliant | |
| EAN | 3605340217964 | |
| HS Code | 85351000 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen X209297 used for?
The Mersen X209297 is a DIN high-voltage back-up fuse-link used to protect distribution transformers against the effects of high short-circuit currents.
What are the voltage and current ratings of this fuse?
The fuse has a rated operating voltage of 7.2 kV AC and a rated current of 25 A.
What are the dimensions of the Mersen X209297?
The fuse-link measures approximately 56 mm in diameter and 192 mm in length, corresponding to its DIN high-voltage format.
Does the X209297 include a striker?
Yes. It includes an 80 N medium striker with 30 mm travel for operating compatible switchgear mechanisms or indicating that the fuse has operated.
Is the Mersen X209297 a full-range fuse?
No. It is a back-up fuse-link intended primarily to interrupt high short-circuit currents. It should be correctly coordinated with suitable switching or protection equipment for lower overcurrent conditions.
Trusted High-Voltage Protection from Mersen
Mersen Limitor® high-voltage fuse-links are widely used in transformer installations, substations and industrial distribution systems where dependable current limitation and short-circuit protection are essential.
