Fuse link - NH3 gG 250A/800V - time-lag 004184526

Safety and electrical installation protection

NH3 250A/800V fuse link is an element used to protect electrical circuits against the effects of overloads and short circuits. It is a key component in ensuring the reliable operation of installations, both in industrial applications and in public buildings. Manufactured by the renowned ETI, this fuse link is characterized by high quality workmanship and meets stringent safety standards.

Characteristics and application

NH3 fuse with a rated current of 250A and a voltage of 800V, with a time-delay characteristic (gG), is designed to protect installations supplying devices with high inrush current. The gG characteristic provides a delayed disconnection in the event of short-term overloads, which minimizes the risk of unnecessary circuit tripping during the starting of motors or other devices requiring momentary high current draw. The combined indicator (double) allows for quick visual identification of the fuse status - whether it has blown or is functioning correctly.

• Application: ideal for protecting circuits powering motors, transformers and other devices with high inrush current.
• Time-delay characteristic (gG): allows for momentary exceeding of the rated current without tripping the circuit, which is important when starting inductive devices.
• Rated voltage 800V: enables use in high-voltage installations.
• Type of voltage AC: designed for operation in alternating current circuits.
• Operation indicator: facilitates quick diagnosis of the fuse status and identification of any failure.

Construction and mounting

The NH3 fuse link is mounted in dedicated NH3 fuse holders. The lack of metal insulated grips (IMGL) means a standard construction, requiring appropriate selection of the holder to ensure insulation and safety. Fuse replacement should be performed by a qualified electrician, after disconnecting the power supply and ensuring that the circuit is isolated from voltage. The product weight is approximately 0.8 kg, which facilitates its transport and installation. It is important to observe appropriate safety precautions when working with energized equipment.