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MERSEN FUSE H 1209UP BCKUP T VDE292-56/50 Z1000269
Mersen Z1000269 Limitor-PTD DIN high-voltage back-up transformer fuse rated at 12 kV AC and 50 A with a 63 kA breaking capacity and integrated thermal striker.
£91.98
Why Choose the Mersen Z1000269 High-Voltage Transformer Fuse?
The Mersen Z1000269, catalogue reference 45DB120V50PTD, is a premium DIN high-voltage back-up fuse-link developed for reliable protection of medium-voltage power transformers. As part of the Mersen Limitor®-PTD series, it combines controlled power dissipation with an integrated thermal striker to provide dependable fault protection for transformer installations using air or gas insulated switchgear.
Rated at 12 kV AC and 50 A, the fuse-link delivers outstanding current-limiting performance with a 63 kA breaking capacity. It is specifically engineered to minimise the thermal and dynamic effects of high fault currents, helping to extend the service life of transformers and associated switchgear.
Manufactured using a high-strength ceramic body, pure silver fuse elements and silver-plated copper terminals, the Z1000269 complies with IEC 60282-1 and VDE T402 requirements. The integrated 80 N thermal striker provides positive indication of fuse operation and can be used to activate compatible switchgear trip mechanisms.
Key Advantages
- DIN high-voltage back-up fuse for transformer protection.
- 12 kV AC voltage rating for medium-voltage distribution networks.
- 50 A rated current for transformer applications.
- 63 kA breaking capacity for dependable fault interruption.
- Controlled power dissipation improves long-term reliability.
- Integrated 80 N thermal striker for indication and switchgear tripping.
- Ceramic construction with pure silver fuse elements.
- Designed to IEC 60282-1 and VDE T402 standards.
Key Features
- Mersen Limitor®-PTD back-up fuse series.
- 12 kV AC IEC rated voltage.
- 50 A current rating.
- 63 kA maximum breaking capacity.
- 190 A minimum interrupting rating.
- 25 kA²s clearing I²t.
- 62 W power dissipation at rated current.
- Integrated thermal striker with 80 N operating force.
- Clip mounting with cylindrical terminals.
- Silver-plated copper terminals and ceramic body.
Reliable Protection for Medium-Voltage Transformers
The Mersen Z1000269 is designed to rapidly interrupt high short-circuit currents before they can cause significant damage to transformers and associated equipment. Its current-limiting performance helps reduce both thermal stress and electrodynamic forces within the electrical installation, improving overall system reliability.
The Limitor®-PTD range is recommended for transformer protection in conjunction with air or gas insulated switchgear and is widely used throughout industrial facilities, utility substations and electrical infrastructure projects.
Typical Applications
- Medium-voltage transformer protection.
- Gas insulated switchgear (GIS).
- Air insulated switchgear.
- Industrial power distribution systems.
- Utility substations.
- Renewable energy and infrastructure projects.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 50 A | |
| Voltage | 12000 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-PTD Back-up Fuses | |
| Model | Z1000269 | |
| Catalogue number | 45DB120V50PTD | |
| Product type | High-voltage DIN back-up fuse-link | |
| Application | Transformer protection | |
| Rated voltage | 12 kV AC | |
| Rated current | 50 A | |
| Frequency | 50 / 60 Hz | |
| Maximum breaking capacity | 63 kA | |
| Minimum interrupting rating | 190 A | |
| Clearing I²t | 25 kA²s | |
| Power dissipation | 62 W | |
| Fuse size | Ø56 mm × 292 mm | |
| Overall length | 358 mm | |
| Mounting | Clip | |
| Design | VDE T402 | |
| Indication system | Thermal striker | |
| Striker force | 80 N | |
| Terminal material | Silver-plated copper | |
| Body material | Ceramic | |
| Product weight | Approx. 1.7 kg | |
| EAN | 3605340456646 | |
| Compliance | IEC 60282-1 | |
| HS Code | 85351000 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen Z1000269 used for?
The Mersen Z1000269 is a high-voltage DIN back-up fuse-link designed to protect medium-voltage transformers against high short-circuit currents.
What are the voltage and current ratings?
This fuse is rated at 12 kV AC with a continuous current rating of 50 A.
What is the breaking capacity?
The Z1000269 has a maximum breaking capacity of 63 kA, allowing it to safely interrupt very high fault currents.
Does this fuse include a thermal striker?
Yes. It incorporates an 80 N thermal striker which provides fuse operation indication and can actuate compatible switchgear trip mechanisms.
Which standards does the Z1000269 comply with?
The fuse is manufactured in accordance with IEC 60282-1 and VDE T402 for medium-voltage transformer protection.
Trusted by Electrical Utilities and OEMs
Mersen Limitor®-PTD high-voltage fuse-links are trusted worldwide for transformer protection, offering proven fault interruption performance, dependable operation and long service life in demanding medium-voltage applications.
