Drop Out Fuse is a pole mounted, medium voltage over current protection device featuring a replaceable Fuse element, a hinged fuse tube and porcelain or polymer insulators, designed to automatically disconnect a faulty circuit.
DO Fuse Set is a pole mounted, single phased over current protection device, made with fuse carriers of fiber glass tube with heavily tinned non ferrous metal parts, meant for outdoor application.
Applications :
- Protection of 11 KV, 22 KV & 33 KV distribution Transformers.
- Overhead distribution feeders and branch lines.
- Rural and urban electrical distribution systems.
Advantages :
- Simple and reliable protection.
- Visible indication of a blown fuse.
- Easy to replace after a fault.
- Low cost and widely used in outdoor power systems.
Trusted Drop Out Fuse (DO Fuse set) Manufacturer
Simplex Power Industries is the most trusted Drop Out Fuse manufacturer having many years of experience and ISO 9001:2015 certification. We are worldwide DO Fuse supplier for High Tension Power distribution lines and Low Tension Power distribution lines with various types of design, voltage and current capacity. Note our manufacturing capacity as below :
- Voltage : 11 KV, 22 KV and 33 KV.
- Current rating : 100 Amps, 200 Amps and 400 Amps.
- Design type : Channel, Bracket and Expulsion.
- Insulator materials : Polymer and Porcelain.
Drop Out Fuse (DO Fuse) in Transformer
A Drop Out Fuse in Transformer protects the electrical system by breaking the circuit during a short circuit, overload or severe fault. It is a secondary Fuse is placed after the Transformer’s out put points, guards the electrical system and Transformers against destructive over currents and to protect Transformers on rural distribution network.
DO Fuse in Transformer is an essential protection device used to safeguard, for terminal faults and assist cable Transformers. This is a mechanical over current protection device, most commonly used short circuit protection switch.
| Parameter | Details |
| Application | Installed on the high-voltage (HV) side of distribution transformers |
| Main Function | Protects the transformer from overloads and short circuits by disconnecting the faulty transformer from the supply |
| Advantages | • Visible indication after fuse operation (drop-out action) • Easy fault identification and isolation• Simple, reliable, and economical • Easy to replace the fuse link Suitable for outdoor pole-mounted transformers • Reduces transformer damage and improves system safety |
| Common Voltage Ratings | 11 KV, 22 KV, 33 KV |
| Fuse Holder Ratings | 100 Amps, 200 Amps & 400 Amps |
| Common Fuse Link Ratings | 50, 63, 80, 100, 200, 400 Amps |
| Typical Transformer Applications | 25 kVA (2–3 A), 63 kVA (5–6 A), 100 kVA (8–10 A), 160 kVA (10–12 A), 200 kVA (12–16 A), 250 kVA (16–20 A), 315 kVA (20–25 A), 500 kVA (30–40 A) |