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 FUSIBLE FT4 12KV M2 TP120V6,3A127M2
Mersen G1005543 high-voltage potential transformer fuse, catalogue number TP120V6.3A127M2, rated 12 kV AC and 6.3 A for instrument transformer protection.
Why Choose the Mersen G1005543 High-Voltage Potential Transformer Fuse?
The Mersen G1005543, catalogue number TP120V6.3A127M2, is a high-voltage fuse specifically designed to protect voltage (potential) transformers in medium-voltage electrical networks. Engineered for dependable operation, it provides fast and effective fault protection while maintaining reliable performance in utility, industrial and infrastructure applications.
Rated at 12 kV AC and 6.3 A, this fuse is manufactured for dedicated voltage transformer protection where precise fault interruption and dependable insulation performance are essential. Its compact design allows straightforward installation within compatible high-voltage fuse assemblies.
Manufactured using high-quality ceramic insulation with precision-engineered fuse elements, the G1005543 offers excellent reliability and long service life in demanding medium-voltage environments. It is suitable for protecting instrument transformers used for metering, monitoring and protection circuits.
Key Advantages
- Designed specifically for potential (voltage) transformer protection.
- 12 kV AC rated voltage for medium-voltage applications.
- 6.3 A current rating.
- Rapid fault interruption helps protect valuable measuring equipment.
- Reliable ceramic construction for demanding electrical environments.
- Suitable for utility, industrial and infrastructure installations.
- Manufactured by Mersen, a recognised leader in electrical protection.
Key Features
- Mersen high-voltage potential transformer fuse.
- Catalogue number: TP120V6.3A127M2.
- 12 kV AC rated voltage.
- 6.3 A rated current.
- Specifically designed for voltage transformer protection.
- High-quality ceramic fuse body.
- Precision fuse element construction.
- Suitable for medium-voltage switchgear installations.
- Reliable long-term electrical performance.
- RoHS compliant.
Reliable Protection for Voltage Transformers
Voltage transformer fuses protect instrument transformers against internal faults and short circuits while helping to maintain the integrity of metering and protection circuits. The Mersen G1005543 is designed specifically for these demanding applications, providing dependable operation throughout the service life of the installation.
Its dedicated design helps minimise equipment damage and downtime while supporting safe operation of medium-voltage electrical systems across industrial, commercial and utility environments.
Typical Applications
- Medium-voltage voltage transformers.
- Potential transformer protection.
- Electrical substations.
- Medium-voltage switchgear.
- Utility distribution systems.
- Industrial power distribution.
- Metering and protection circuits.
Technical Specifications
Tick the specs you need, then view products that match.
| Voltage | 120 V | |
|---|---|---|
| Device Type | Fuse link | |
| Fuse Type | High voltage | |
| Current | 6.3 A | |
| Manufacturer | Mersen | |
| Item number | G1005543 | |
| Catalogue number | TP120V6.3A127M2 | |
| Product type | High-voltage potential transformer fuse | |
| Primary application | Voltage transformer protection | |
| Rated voltage | 12 kV AC | |
| Rated current | 6.3 A | |
| Current type | AC | |
| Construction | Ceramic high-voltage fuse-link | |
| Mounting | Compatible HV fuse holder | |
| Weight | Approximately 1.30 kg | |
| RoHS compliant | Yes |
Frequently Asked Questions
What is the Mersen G1005543 used for?
The G1005543 is designed to protect medium-voltage potential (voltage) transformers used in metering and protection systems.
What are the voltage and current ratings?
This fuse is rated at 12 kV AC with a 6.3 A current rating.
What is the catalogue number for this fuse?
The Mersen catalogue number is TP120V6.3A127M2.
Where is this fuse typically installed?
It is installed within compatible medium-voltage switchgear and potential transformer protection assemblies.
Why are dedicated voltage transformer fuses required?
Voltage transformer fuses are specifically engineered to protect instrument transformers while maintaining reliable operation of metering and protection equipment.
Trusted Medium-Voltage Protection from Mersen
Mersen high-voltage instrument transformer fuses are widely used by utilities, panel builders and industrial engineers to provide dependable protection for voltage transformers in medium-voltage power systems.
