Eaton 315A Tag Fuse NH3 1000V

This tag fuse is a fast-acting protective link designed for battery energy storage systems and DC arrays. It is intended to isolate faulted battery strings and to interrupt reverse and multi-array fault currents in high-voltage battery installations, providing dependable protection for combiners, disconnects and inverter interfaces in industrial and renewable-energy applications.

• 1000V rated voltage for high-voltage battery systems
• 315A continuous current rating for high-current circuits
• Fast-acting operation to limit fault duration
• Breaking capacity 100kA to handle severe fault currents
• Low power loss at rated current to reduce thermal stress
• Dual indicator feature for clear fault identification

• Suitable for battery array combiners in storage facilities
• Ideal for DC isolators in solar-plus-storage installations
• Used for inverter protection in commercial energy systems
• can be used with NH fuse bases in switchgear assemblies

It can be supplied with either a knife-blade termination for plug-in mounting or a bolted-blade termination for fixed bolted connections, enabling compatibility with different NH base arrangements.

The link is designed to interrupt low reverse and multi-array fault currents with a defined pre-arcing energy characteristic to reduce let-through energy and protect downstream equipment.

Time to current curves are provided across the NH range showing pre‑arcing and total I2t behaviour, with the NH3 size mapped for prospective currents up to hundreds of kiloamperes.

Microswitches and compatible fuse holders can be specified separately for the bladed variant to allow remote indication of fuse operation.