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MERSEN FUSE H 2409P BCKUP 442-56/31,5 E2409P IB-D1 442/31.5
Mersen Y209344 Limitor-P high-voltage DIN back-up fuse-link rated at 24 kV AC and 31.5 A, with a 63 kA breaking capacity, 56 mm diameter, 442 mm fuse length and integrated 80 N striker.
£70.24
Why Choose the Mersen Y209344 High-Voltage Transformer Fuse?
The Mersen Y209344, catalogue reference 45DB240V32P, is a high-voltage DIN back-up fuse-link designed to protect distribution transformers against the damaging effects of short-circuit currents. As part of the established Mersen Limitor®-P series, it provides dependable current-limiting protection for high-voltage switchgear, controlgear and electrical distribution systems.
Rated at 24 kV AC and 31.5 A, the Y209344 rapidly interrupts substantial fault currents before they reach their maximum prospective peak. This helps reduce the electrical, thermal and mechanical stress applied to transformers, cables, conductors and associated high-voltage equipment during severe short-circuit conditions.
The fuse-link features a durable ceramic body, pure silver fuse elements and silver-plated copper terminals for reliable electrical performance. Its standard DIN fuse size measures 56 mm in diameter and 442 mm in length, while the integrated 80 N standard striker can operate compatible switchgear mechanisms or provide clear indication after the fuse has operated.
Key Advantages
- Dependable high-voltage transformer short-circuit protection.
- 24 kV AC rated voltage for high-voltage distribution systems.
- 31.5 A rated current for suitable transformer applications.
- High 63 kA breaking capacity for demanding fault conditions.
- Current-limiting operation helps reduce peak fault current and equipment stress.
- Integrated 80 N striker for switchgear operation or fuse indication.
Key Features
- Mersen Limitor®-P high-voltage DIN back-up fuse-link.
- Catalogue number: 45DB240V32P.
- Rated voltage: 24 kV AC.
- Rated current: 31.5 A.
- Breaking capacity: 63 kA.
- Minimum interrupting rating: 105 A.
- Total clearing I²t: 7 kA²s at rated voltage.
- Fuse size: 56 mm diameter × 442 mm length.
- Standard striker: 80 N.
- Pure silver fuse elements and silver-plated copper terminals.
Reliable Protection for High-Voltage Transformers
Back-up fuse-links such as the Mersen Y209344 are designed to interrupt high short-circuit currents above their specified minimum interrupting level. They are typically coordinated with suitable switching devices or additional protective equipment to provide effective transformer protection throughout the required fault-current range.
During a severe electrical fault, the pure silver fuse elements operate rapidly within the ceramic body. This current-limiting action reduces the energy transferred into the protected system, helping minimise damage to transformers, conductors, cables and high-voltage switchgear.
Typical Applications
- High-voltage distribution transformer protection.
- HV/LV transformer installations.
- Electrical substations and utility networks.
- High-voltage switchgear and controlgear.
- Industrial electrical distribution systems.
- Transformer panels and fused switch combinations.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 31.5 A | |
| Voltage | 24000 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-P | |
| Model | Y209344 | |
| Catalogue number | 45DB240V32P | |
| Product type | High-voltage DIN back-up fuse-link | |
| Application | Distribution transformer short-circuit protection | |
| Rated voltage | 24 kV AC | |
| Rated current | 31.5 A | |
| Current type | AC | |
| Breaking capacity | 63 kA | |
| Minimum interrupting rating | 105 A | |
| Total clearing I²t at rated voltage | 7 kA²s | |
| Fuse diameter | 56 mm | |
| Fuse length | 442 mm | |
| Overall product length | 508 mm | |
| Striker type | Standard striker | |
| Striker force | 80 N | |
| Indication system | Integrated striker | |
| Mounting type | Clip mounting | |
| Terminal type | Cylindrical | |
| Terminal material | Silver-plated copper | |
| Body material | Ceramic | |
| Fuse-element material | Pure silver | |
| Power dissipation at rated current | 127 W | |
| Design | VDE T4 | |
| Product weight | 2.3 kg | |
| Standards | IEC 60282-1, VDE 0670 Part 4 and DIN 43625 | |
| Compliance | RoHS compliant | |
| EAN | 3605340218374 | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen Y209344 used for?
The Mersen Y209344 is a high-voltage DIN back-up fuse-link designed to protect distribution transformers against the damaging effects of high short-circuit currents.
What are the voltage and current ratings of this fuse?
The Y209344 has a rated voltage of 24 kV AC and a rated current of 31.5 A.
What is the breaking capacity of the Mersen Y209344?
The fuse has a maximum AC breaking capacity of 63 kA and a minimum interrupting rating of 105 A.
What are the dimensions of the Mersen Y209344?
The fuse body measures approximately 56 mm in diameter and 442 mm in length, with an overall product length of approximately 508 mm.
Does the Y209344 include a striker?
Yes. It incorporates an integrated 80 N standard striker for operating compatible switchgear mechanisms or indicating that the fuse has operated.
Trusted High-Voltage Protection from Mersen
Mersen Limitor®-P high-voltage fuse-links are widely used in transformer installations, substations and industrial distribution systems where dependable current limitation and reliable short-circuit protection are essential.
