Mersen BHH Series Medium Voltage Potential Transformer Fuse, Ferrule Type

Mersen BHH Series Medium Voltage Potential Transformer Fuse, Ferrule Type

The Mersen BHH Series Medium Voltage Potential Transformer Fuse is a current-limiting, ferrule-type fuse engineered for primary winding protection of potential transformers in medium voltage systems. This compact, small-dimension fuse mounts in standard clips, carries a rated voltage of 15500VAC UL, an AC interrupting rating of 120 kA, and is available across a current rating range of 0.25A to 10A to match a variety of transformer protection needs. Copper terminals, an epoxy insulating body, and a built-in visual indicator combine to deliver reliable, easy-to-verify protection for medium voltage electrical systems.

Key Features

• Ferrule Terminal Design: ferrule-type construction with small overall dimensions mounts in standard clips for straightforward installation and replacement.
• Current-Limiting Protection: high AC interrupting rating (maximum breaking capacity) of 120 kA safeguards potential transformer primary windings from fault currents.
• Rated Voltage: 15500VAC (rated voltage AC UL) supports demanding medium voltage system applications.
• Current Rating Range: available from 0.25A to 10A, allowing selection of the exact ampere rating needed for a given transformer protection scheme.
• Copper Terminals: connection and terminal material of copper delivers reliable, low-resistance conductivity at the clip interface.
• Epoxy Body Construction: body and insulating material is epoxy, providing durable, long-lasting insulation performance in service.
• Visual Indicator: built-in visual indication system allows maintenance personnel to quickly confirm fuse status without de-energizing equipment.
• AC Rated: designed for AC circuits operating at a frequency of 50/60 Hz.
• Clip Mounting: mounts directly in standard fuse clips, simplifying integration into existing potential transformer protection assemblies.

Technical Specifications

• AC or DC: AC
• Indication System: Yes

Typical Applications

• Potential Transformer Primary Winding Protection
• Medium Voltage Switchgear and Substations
• Utility and Industrial Power Distribution Systems
• Metering and Instrumentation Circuits
• Panelboard and Switchgear Retrofit or New Construction Projects

Why Mersen?

Mersen's BHH Series fuses pair current-limiting performance with a compact ferrule design, copper terminals, and an epoxy insulating body to deliver dependable, code-compliant primary-side protection for potential transformers across a broad 0.25A to 10A current range. The built-in visual indicator adds an extra layer of confidence for maintenance teams working in demanding 15500VAC medium voltage environments, helping ensure protection status can be verified quickly and safely.