Mersen G1005543 high-voltage potential transformer fuse, catalogue number TP120V6.3A127M2, rated 12 kV AC and 6.3 A for instrument transformer protection.
£260.41
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.
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.
| Voltage | 120 V |
|---|---|
| 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 |
The G1005543 is designed to protect medium-voltage potential (voltage) transformers used in metering and protection systems.
This fuse is rated at 12 kV AC with a 6.3 A current rating.
The Mersen catalogue number is TP120V6.3A127M2.
It is installed within compatible medium-voltage switchgear and potential transformer protection assemblies.
Voltage transformer fuses are specifically engineered to protect instrument transformers while maintaining reliable operation of metering and protection equipment.
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.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...