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MERSEN FUSE H 1209P BCKUP 292-56/31,5 E1209PIB-D1292/31,5
Mersen L209310 Limitor P DIN high voltage back-up fuse-link for transformer protection, rated 12 kV AC and 31.5 A with a 63 kA breaking capacity and standard 80 N thermal striker.
£70.24
Why Choose the Mersen L209310 High Voltage Transformer Fuse?
The Mersen L209310 is a high quality Limitor®-P DIN high voltage back-up fuse-link engineered to provide dependable short-circuit protection for medium voltage transformers. Designed in accordance with IEC 60282-1, this fuse-link is specifically developed for protecting transformers installed within medium voltage switchgear and electrical distribution systems.
Part of the proven Mersen Limitor®-P range, the L209310 combines pure silver fuse elements, silver-coated copper end caps and a durable ceramic body to deliver reliable long-term performance. The integrated 80 N thermal striker provides dependable operation with compatible switchgear mechanisms, helping improve protection and fault isolation.
With a rated voltage of 12 kV AC, a rated current of 31.5 A and a 56 mm diameter × 292 mm length, the Mersen L209310 is ideally suited to protecting distribution transformers from damaging short-circuit currents whilst maintaining reliable operation of medium voltage electrical networks.
Key Advantages
- High voltage DIN back-up fuse-link for transformer protection.
- 12 kV AC rated voltage.
- 31.5 A rated current.
- Designed to IEC 60282-1 requirements.
- 63 kA maximum breaking capacity.
- Integrated 80 N thermal striker.
- Pure silver fuse elements with ceramic body construction.
- Suitable for medium voltage switchgear and transformer installations.
Key Features
- Mersen Limitor®-P back-up fuse series.
- Catalogue number: 45DB120V32P.
- 12 kV AC rated voltage.
- 31.5 A current rating.
- 56 mm diameter × 292 mm length.
- 63 kA maximum breaking capacity.
- 9 kA²s total clearing I²t.
- 105 A minimum breaking current.
- 80 N thermal striker.
- Clip mounting DIN fuse design.
Reliable Protection for Medium Voltage Transformers
The Mersen L209310 is designed to rapidly interrupt high prospective fault currents before they can damage transformers and associated switchgear. Its current-limiting characteristics reduce both thermal and mechanical stress on protected equipment, improving system reliability and minimising downtime.
The Limitor®-P range combines precision manufactured pure silver fuse elements with robust ceramic insulation and an integrated thermal striker, making the L209310 ideal for utility substations, industrial power distribution systems and OEM medium voltage switchgear.
Typical Applications
- Medium voltage transformer protection.
- Utility substations.
- Industrial power distribution.
- Medium voltage switchgear.
- Electrical infrastructure projects.
- Renewable energy installations.
- Commercial power distribution systems.
Technical Specifications
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| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | High voltage | |
| Current | 31.5 A | |
| Voltage | 12000 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-P Back-up Fuses | |
| Model | L209310 | |
| Catalogue number | 45DB120V32P | |
| Product type | High voltage DIN back-up fuse-link | |
| Application | Transformer protection | |
| Rated voltage | 12 kV AC | |
| Rated current | 31.5 A | |
| Breaking capacity | 63 kA | |
| Minimum breaking current | 105 A | |
| Total clearing I²t | 9 kA²s | |
| Cold resistance | 43 mΩ | |
| Power dissipation at In | 65 W | |
| Fuse diameter | 56 mm | |
| Fuse length | 292 mm | |
| Mounting | Clip mounting | |
| Thermal striker | Standard 80 N | |
| Body material | Ceramic | |
| Fuse element | Pure silver | |
| End caps | Silver-coated copper | |
| Weight | Approximately 1.7 kg | |
| EAN | 3605340218084 | |
| RoHS compliant | Yes | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen L209310 used for?
The Mersen L209310 is a DIN high voltage back-up fuse-link designed to protect medium voltage transformers against damaging short-circuit currents.
What voltage is the L209310 rated for?
The fuse has a rated operating voltage of 12 kV AC.
What current rating does this fuse have?
The Mersen L209310 has a continuous current rating of 31.5 A.
Does this fuse include a striker?
Yes. It incorporates a standard 80 N thermal striker for operation with compatible medium voltage switchgear.
What are the dimensions of the fuse?
The fuse has a nominal diameter of 56 mm and a fuse-link length of 292 mm.
Trusted by Utilities and Electrical Engineers Worldwide
Mersen Limitor®-P high voltage fuse-links are trusted worldwide by utilities, switchgear manufacturers and industrial engineers to provide dependable transformer protection and reliable medium voltage network performance.
