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MERSEN FUSE 729P CPASJB 45/67.292 125 729PCPASJB45/67.292125
Mersen P078167 Limitor high-voltage back-up fuse rated at 7.2 kV AC and 125 A with integrated 20 N striker for medium-voltage motor protection.
£535.26
Why Choose the Mersen P078167 Limitor® High Voltage Motor Protection Fuse?
The Mersen P078167, catalogue number 45ASB72V125P-2, is a premium high-voltage back-up fuse designed specifically for the protection of medium-voltage motors and associated switchgear. Part of the proven Mersen Limitor® aSJB/D series, it provides dependable short-circuit protection while withstanding the repeated inrush currents experienced during motor starting.
Manufactured using high-quality silver fuse elements, silver-plated brass end caps and a melamine fibreglass body, the P078167 delivers excellent electrical performance and long service life in demanding industrial environments. Its integrated 20 N striker provides reliable mechanical indication and operation of associated trip mechanisms where required.
Rated at 7.2 kV AC and 125 A, this IEC compliant back-up fuse is ideal for protecting medium-voltage motors installed within industrial plants, utilities, mining operations and critical infrastructure. Its 67 mm diameter × 292 mm length format enables straightforward installation into compatible medium-voltage fuse gear.
Key Advantages
- Designed specifically for medium-voltage motor protection.
- 7.2 kV AC voltage rating for IEC high-voltage systems.
- 125 A current rating for industrial motor applications.
- Integrated 20 N striker for mechanical trip indication.
- Designed to withstand repeated motor starting currents.
- Premium silver fuse elements provide consistent protection and reliability.
Key Features
- Mersen Limitor® aSJB/D back-up fuse.
- Catalogue number: 45ASB72V125P-2.
- Item number: P078167.
- Rated voltage: 7.2 kV AC.
- Rated current: 125 A.
- 67 mm diameter × 292 mm length.
- Integrated 20 N striker.
- Silver fuse elements.
- Silver-plated brass end caps.
- Melamine fibreglass fuse body.
Reliable High Voltage Motor Protection
Medium-voltage motors require specialised protection capable of clearing short-circuit faults while tolerating the high peak currents produced during motor starting. The Limitor® aSJB/D range has been developed specifically for this purpose, providing dependable protection without nuisance operation during normal motor acceleration.
The integrated striker can be used to operate switchgear trip mechanisms, helping improve equipment safety and simplify fault isolation. Combined with premium construction materials and proven IEC design, the P078167 delivers long-term performance in demanding industrial installations.
Typical Applications
- Medium-voltage motor protection.
- HV motor starters.
- Industrial switchgear.
- Motor control centres.
- Mining and heavy industry.
- Utilities and electrical distribution systems.
Technical Specifications
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| Device Type | Fuse link | |
|---|---|---|
| Fuse Type | High voltage | |
| Current | 125 A | |
| Voltage | 7200 V | |
| Manufacturer | Mersen | |
| Series | Limitor® aSJB/D Back-up Fuses | |
| Item number | P078167 | |
| Catalogue number | 45ASB72V125P-2 | |
| Product type | High-voltage motor back-up fuse | |
| Rated voltage | 7.2 kV AC | |
| Rated current | 125 A | |
| Current type | AC | |
| Fuse size | Ø67 mm × 292 mm | |
| Striker | 20 N | |
| Minimum breaking current (I₃) | 700 A | |
| Operating I²t | 195 kA²s | |
| Power dissipation at 0.7 In | 29 W | |
| Construction | Silver fuse elements, silver-plated brass end caps, melamine fibreglass body | |
| Standards | IEC 60644 | |
| Weight | Approx. 2.7 kg | |
| EAN | 3605340028263 |
Frequently Asked Questions
What is the Mersen P078167 used for?
The P078167 is designed to provide high-voltage back-up short-circuit protection for medium-voltage motors and associated switchgear.
What is the voltage rating of the P078167?
The fuse has a rated operating voltage of 7.2 kV AC.
What is the current rating?
The Mersen P078167 has a 125 A current rating.
Does this fuse include a striker?
Yes. It incorporates an integrated 20 N striker for mechanical indication and operation of compatible trip mechanisms.
What size is the P078167?
The fuse measures approximately 67 mm in diameter and 292 mm in length.
Trusted for Medium Voltage Protection
Mersen Limitor® high-voltage motor protection fuses are trusted worldwide by utilities, OEMs, switchgear manufacturers and industrial engineers for dependable protection of medium-voltage motors and electrical distribution systems.
