Eti-Polam NH3 Fuse Link 361A gTr 250kVA 400V WT-3

The Eti-Polam NH3 fuse link is a specialized electrical protection device engineered specifically for the reliable safeguarding of distribution transformers. Designed to meet the rigorous demands of industrial power networks, this gTr class fuse link provides precise protection for systems operating at 400V. With a rated current of 361A and a capacity of 250kVA, it ensures that electrical infrastructure remains protected against the specific thermal and short-circuit stresses associated with transformer operation.

Advantages

This fuse link offers exceptional performance due to its gTr classification, which is optimized for the unique load profiles of transformers. By providing a specific time-current characteristic, it prevents unnecessary tripping during transformer inrush currents while ensuring rapid disconnection during genuine fault conditions. The robust construction of the WT-3 size standard ensures excellent thermal conductivity and mechanical stability, allowing for long-term reliability in demanding industrial environments. Its compatibility with standard NH3 fuse bases simplifies installation and maintenance procedures within existing electrical distribution panels.

Suitable for

• Protection of distribution transformers in industrial power grids
• Electrical distribution systems requiring gTr class protection
• Applications where transformer inrush current management is critical
• Industrial facilities utilizing standard NH3 fuse base mounting systems

This fuse link is not suitable for general-purpose circuit protection where a standard gG characteristic is required, as the gTr characteristic is specifically tuned for transformer protection. It should also not be used in systems exceeding the rated voltage of 400V or in applications where the transformer capacity significantly deviates from the 250kVA rating.

Key specifications

• Rated current: 361A
• Transformer capacity: 250kVA
• Rated voltage: 400V
• Fuse class: gTr
• Size standard: NH3 (WT-3)

Installation should be performed by qualified electrical personnel in accordance with local safety regulations. The fuse link is inserted into a compatible NH3 fuse base or disconnect switch. Ensure that the power is disconnected before installation or replacement to prevent electrical shock. Verify that the fuse base contacts are clean and free of oxidation to ensure optimal electrical connection and heat dissipation.

What to consider before purchase

• Verify that the transformer capacity matches the 250kVA rating
• Ensure the fuse base is compatible with the NH3 (WT-3) size standard
• Confirm that the system voltage does not exceed 400V
• Check that the gTr characteristic is appropriate for your specific protection requirements

Usage recommendations

Always replace fuses with the exact same type and rating to maintain the integrity of the protection scheme. Regularly inspect the fuse base for signs of overheating or loose connections to ensure the longevity of the installation.