Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
MERSEN FUSE H 729P BCKUP 192-56/4 45DB72V4P
Mersen P1000099 Limitor-P DIN high-voltage back-up fuse rated at 7.2 kV AC and 4 A with integrated 80 N striker for transformer protection.
£62.56
Why Choose the Mersen P1000099 Limitor®-P High Voltage Transformer Protection Fuse?
The Mersen P1000099, catalogue number 45DB72V4P, is a premium high voltage DIN back-up fuse designed specifically for the protection of medium-voltage transformers against the effects of short-circuit currents. Part of the proven Mersen Limitor®-P range, it complies with IEC 60282-1 and provides dependable protection for high-voltage switchgear, transformer installations and electrical distribution systems.
Manufactured using pure silver fuse elements, silver-coated copper end caps and a high-strength ceramic body, the P1000099 delivers outstanding electrical performance and long operational life in demanding industrial environments. The integrated 80 N striker enables mechanical tripping of compatible switchgear and provides reliable fuse operation indication.
Rated at 7.2 kV AC and 4 A, the Mersen P1000099 is ideal for transformer protection in utilities, substations, industrial plants and OEM switchgear assemblies. Its compact 56 mm diameter × 192 mm length DIN format ensures compatibility with standard high-voltage fuse mounting systems.
Key Advantages
- Designed specifically for medium-voltage transformer protection.
- 7.2 kV AC rated voltage for IEC high-voltage systems.
- 4 A current rating for transformer protection applications.
- Integrated 80 N striker for switchgear tripping and indication.
- Manufactured using premium silver fuse elements for dependable performance.
- Fully compliant with IEC 60282-1.
Key Features
- Mersen Limitor®-P DIN back-up fuse.
- Catalogue number: 45DB72V4P.
- Item number: P1000099.
- Rated voltage: 7.2 kV AC.
- Rated current: 4 A.
- 56 mm diameter × 192 mm length.
- Integrated 80 N striker.
- Pure silver fuse elements.
- Silver-coated copper end caps.
- Ceramic insulating body.
Reliable High Voltage Transformer Protection
High-voltage transformers require specialised protection capable of rapidly clearing short-circuit faults before significant thermal or mechanical damage can occur. The Mersen Limitor®-P range has been developed specifically for transformer protection, providing dependable fault interruption while maintaining excellent long-term reliability.
The integrated striker allows operation of compatible switchgear trip mechanisms or signalling devices, helping improve system safety and simplify maintenance. Premium construction materials and compliance with IEC standards make the P1000099 suitable for demanding industrial and utility installations.
Typical Applications
- Medium-voltage transformer protection.
- High-voltage switchgear.
- Electrical substations.
- Industrial power distribution.
- Utility electrical networks.
- OEM medium-voltage equipment.
Technical Specifications
Tick the specs you need, then view products that match.
| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | High voltage | |
| Current | 4 A | |
| Voltage | 7200 V | |
| Manufacturer | Mersen | |
| Series | Limitor®-P Back-up Fuses | |
| Item number | P1000099 | |
| Catalogue number | 45DB72V4P | |
| Product type | High voltage DIN back-up fuse | |
| Application | Transformer protection | |
| Rated voltage | 7.2 kV AC | |
| Rated current | 4 A | |
| Current type | AC | |
| Dimensions | Ø56 mm × 192 mm | |
| Striker force | 80 N | |
| Breaking capacity | 63 kA | |
| Minimum breaking current (I₃) | 20 A | |
| Clearing I²t | 0.8 kA²s | |
| Power dissipation | 5 W | |
| Construction | Pure silver fuse elements, silver-coated copper end caps, ceramic body | |
| Standard | IEC 60282-1 | |
| Weight | Approx. 1.2 kg | |
| EAN | 3605340452723 | |
| RoHS compliant | Yes | |
| HS Code | 85351000 |
Frequently Asked Questions
What is the Mersen P1000099 used for?
The P1000099 is a high-voltage DIN back-up fuse designed specifically to protect medium-voltage transformers against short-circuit currents.
What is the voltage rating of the P1000099?
The fuse has a rated operating voltage of 7.2 kV AC.
What is the current rating?
The Mersen P1000099 has a 4 A current rating.
Does this fuse include a striker?
Yes. It incorporates an integrated 80 N striker for switchgear tripping and mechanical indication.
What size is the P1000099?
The fuse measures approximately 56 mm in diameter and 192 mm in length.
Trusted for High Voltage Transformer Protection
Mersen Limitor®-P high-voltage transformer protection fuses are trusted worldwide by utilities, switchgear manufacturers and industrial engineers for dependable protection of transformers and medium-voltage electrical distribution systems.
