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 1209P GEN PURPOSE 292-65/25 45DG120V25P
Mersen Z1000154 Limitor-G DIN high-voltage general-purpose transformer fuse rated at 12 kV AC and 25 A, with a 40 kA breaking capacity and integrated 80 N striker.
£125.23
Why Choose the Mersen Z1000154 High-Voltage Transformer Fuse?
The Mersen Z1000154, catalogue reference 45DG120V25P, is a dependable DIN high-voltage general-purpose fuse-link designed for the protection of power transformers in medium-voltage switchgear and electrical distribution systems. As part of the Mersen Limitor®-G series, it provides effective protection against short-circuit currents and low overcurrents.
Rated at 12 kV AC and 25 A, the Z1000154 combines rapid fault interruption with high current-limiting performance. Its 40 kA breaking capacity helps minimise the thermal and mechanical stress placed on transformers, cables and associated switchgear during electrical faults.
The fuse-link features a robust ceramic body, pure silver fuse elements and silver-plated copper end caps. An integrated 80 N striker provides mechanical indication when the fuse operates and can be used with compatible switchgear tripping or interlocking mechanisms.
Key Advantages
- General-purpose high-voltage fuse-link for transformer protection.
- 12 kV AC voltage rating for medium-voltage installations.
- 25 A rated current for appropriately sized transformer circuits.
- High 40 kA breaking capacity for reliable fault interruption.
- Current-limiting operation reduces peak fault currents.
- Integrated 80 N striker for indication and switchgear operation.
- Low power dissipation supports efficient system performance.
- Manufactured in accordance with IEC 60282-1.
Key Features
- Mersen Limitor®-G general-purpose fuse series.
- 12 kV AC IEC rated voltage.
- 25 A ampere rating.
- 40 kA maximum breaking capacity.
- 36 kA²s clearing I²t at rated voltage.
- 15 W power dissipation at rated current.
- Mechanical striker indication system.
- Pure silver fuse elements for consistent performance.
- Silver-plated copper end caps.
- Ceramic body for high dielectric and thermal strength.
Reliable Protection for Medium-Voltage Transformers
High-voltage general-purpose fuse-links protect transformers by interrupting both high short-circuit currents and lower overcurrents. The Mersen Z1000154 limits the magnitude and duration of fault current, reducing the risk of severe damage to transformer windings, switchgear and connected distribution equipment.
The Limitor®-G design offers high breaking capacity, rapid operation and low switching voltage. Correct selection should take account of transformer rating, operating voltage, magnetising inrush current and coordination with upstream and downstream protection devices.
Typical Applications
- Medium-voltage transformer protection.
- High-voltage switchgear and controlgear.
- Transformer feeder panels.
- Industrial electrical distribution systems.
- Utility substations and power networks.
- Ring main units and compact substations.
Technical Specifications
Tick the specs you need, then view products that match.
| Fuse Indication | Striker | |
|---|---|---|
| Voltage | 120 V | |
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 25 A | |
| Manufacturer | Mersen | |
| Series | Limitor®-G General Purpose Fuses | |
| Item number | Z1000154 | |
| Catalogue number | 45DG120V25P | |
| Product type | High-voltage DIN general-purpose fuse-link | |
| Application | Transformer protection | |
| Rated voltage | 12 kV AC | |
| Rated current | 25 A | |
| Maximum breaking capacity | 40 kA | |
| Clearing I²t at rated voltage | 36 kA²s | |
| Power dissipation at rated current | 15 W | |
| Fuse body diameter | 65 mm | |
| Fuse body length | 292 mm | |
| Mounting type | Clip mounting | |
| Indication system | Striker | |
| Striker force | 80 N | |
| Fuse element material | Pure silver | |
| Terminal material | Silver-plated copper | |
| Body material | Ceramic | |
| EAN / UPC | 3605340453270 | |
| Compliance | IEC 60282-1 | |
| HS Code | 85351000 | |
| Country of Manufacture | Hungary |
Frequently Asked Questions
What is the Mersen Z1000154 used for?
The Mersen Z1000154 is a high-voltage DIN general-purpose fuse-link used to protect power transformers against short-circuit currents and low overcurrents.
What are the voltage and current ratings of the Z1000154?
The fuse-link is rated at 12 kV AC and 25 A.
What is the breaking capacity of this fuse?
The Mersen Z1000154 has a maximum AC breaking capacity of 40 kA.
Does the Z1000154 include a striker?
Yes. The fuse includes an 80 N mechanical striker that provides operation indication and can activate compatible switchgear mechanisms.
What are the dimensions of the fuse body?
The cylindrical fuse body has a diameter of approximately 65 mm and a length of 292 mm.
Trusted High-Voltage Protection from Mersen
Mersen Limitor®-G fuse-links are widely used in transformer protection, medium-voltage switchgear and electrical distribution systems where rapid fault interruption and dependable current limitation are essential.
