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MERSEN FUSE H 729P BCKUP 192-56/40 Z209299
Mersen Z209299 Limitor-PD DIN high-voltage back-up transformer fuse rated at 7.2 kV AC and 40 A with a 63 kA breaking capacity and integrated 80 N striker.
£87.02
Why Choose the Mersen Z209299 High-Voltage Transformer Fuse?
The Mersen Z209299, catalogue reference 45DB72V40PD, is a high-quality DIN high-voltage back-up fuse-link engineered to protect medium-voltage power transformers against the damaging effects of short-circuit currents. Part of the proven Mersen Limitor®-PD series, it is specifically designed for reliable transformer protection in industrial switchgear, substations and electrical distribution networks.
Rated at 7.2 kV AC and 40 A, the Z209299 delivers a maximum breaking capacity of 63 kA. Its current-limiting characteristics help minimise thermal and mechanical stress on transformers, cables and switchgear during fault conditions, improving equipment protection and system reliability.
Manufactured using a durable ceramic body, pure silver fuse elements and silver-plated copper terminals, the fuse complies with IEC 60282-1 and VDE 0670 T402. An integrated 80 N striker provides reliable operation indication and can actuate compatible switchgear tripping mechanisms.
Key Advantages
- DIN high-voltage back-up fuse-link for transformer protection.
- 7.2 kV AC rated voltage for medium-voltage systems.
- 40 A rated current for transformer applications.
- 63 kA breaking capacity for dependable fault interruption.
- Current-limiting design reduces fault energy.
- Integrated 80 N striker for indication and switchgear tripping.
- Pure silver fuse elements for consistent performance.
- Manufactured to IEC 60282-1 and VDE 0670 T402.
Key Features
- Mersen Limitor®-PD back-up fuse series.
- 7.2 kV AC IEC rated voltage.
- 40 A rated current.
- 63 kA maximum breaking capacity.
- 140 A minimum interrupting current.
- 14 kA²s clearing I²t.
- 30 W power dissipation.
- Mechanical striker with 80 N operating force.
- Silver-plated copper terminals.
- Ceramic body with pure silver fuse elements.
Reliable Protection for Medium-Voltage Transformers
The Mersen Z209299 is engineered to interrupt high fault currents before they can damage transformer windings and associated switchgear. Its current-limiting characteristics reduce both thermal stress and electrodynamic forces, improving equipment reliability and reducing downtime.
As a back-up fuse-link, the Z209299 should be coordinated with suitable protection equipment for overload protection and lower-level overcurrents. It is ideally suited to transformer protection in industrial and utility medium-voltage installations.
Typical Applications
- Medium-voltage transformer protection.
- Industrial electrical distribution systems.
- High-voltage switchgear.
- Utility substations.
- Ring main units.
- Electrical infrastructure projects.
Technical Specifications
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| Fuse Indication | Striker | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 40 A | |
| Voltage | 7200 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-PD Back-up Fuses | |
| Model | Z209299 | |
| Catalogue number | 45DB72V40PD | |
| Product type | High-voltage DIN back-up fuse-link | |
| Application | Transformer protection | |
| Rated voltage | 7.2 kV AC | |
| Rated current | 40 A | |
| Frequency | 50 / 60 Hz | |
| Maximum breaking capacity | 63 kA | |
| Minimum interrupting current | 140 A | |
| Clearing I²t | 14 kA²s | |
| Cold resistance | 12.3 mΩ (±10%) | |
| Power dissipation | 30 W | |
| Fuse size | Ø56 mm × 192 mm | |
| Mounting type | Clip mounting | |
| Design | VDE T402 | |
| Indication system | Standard striker | |
| Striker force | 80 N | |
| Terminal material | Silver-plated copper | |
| Fuse element material | Pure silver | |
| Body material | Ceramic | |
| Product weight | 1.2 kg | |
| EAN / UPC | 3605340217988 | |
| Compliance | IEC 60282-1, VDE 0670 T402, RoHS | |
| HS Code | 85351000 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen Z209299 used for?
The Mersen Z209299 is a DIN high-voltage back-up fuse-link designed to protect medium-voltage power transformers against short-circuit currents.
What are the voltage and current ratings?
The fuse is rated at 7.2 kV AC with a continuous current rating of 40 A.
What is the breaking capacity?
The Z209299 provides a maximum breaking capacity of 63 kA.
Does the fuse include a striker?
Yes. It incorporates a standard 80 N mechanical striker for operation indication and compatible switchgear tripping functions.
Which standards does the Z209299 comply with?
The fuse complies with IEC 60282-1 and VDE 0670 T402 requirements for high-voltage transformer protection.
Trusted High-Voltage Protection from Mersen
Mersen Limitor®-PD high-voltage fuse-links are trusted worldwide by utilities, OEMs and industrial engineers for dependable transformer protection, high fault interruption capability and long service life.
