Drop Out Fuse Element 10kv 36kv KB, KU, KS type Fuse Link

1. Drop Out Fuse Element Overview

The High‑Voltage Drop‑Out Fuse Element (also called a Drop‑Out Fuse Link or Fuse Element) is designed according to IEC 282 standards for reliable overcurrent protection and circuit isolation in outdoor medium‑voltage networks. It comes in two main variants:

T type (without buckle): 12 kV–40.5 kV, 1 A–200 A

T type (with buckle): 12 kV–40.5 kV, 1 A–200 A

K type (with buckle): 12 kV–40.5 kV, 1 A–200 A

Each fuse link comprises a high‑purity alloy element, a precision‑formed buttonhead terminal, flexible leader wires, and an auxiliary tube. These are GRL K-type fuse elements.

2. Drop Out Fuse Element Features

Accurate Time‑Current Characteristics
Fuse elements are made from high‑purity silver, silver‑copper eutectic, or nickel‑chrome eutectic alloys. Every wire is extruded through a precision mold and laser‑measured to ensure exact cross‑section and melting behavior.

Excellent Durability
Swaged end fittings and high‑strength strain wires resist aging, vibration, and high‑current impulses. In three‑phase assemblies, only the blown phase link requires replacement, reducing maintenance time and cost.

Modular, Easy Replacement
Buttonhead and leader assemblies are available in A‑dimensions of 19 mm (for 3–100 A) and 25.4 mm (for 125–200 A), matching your cutout geometry for fast, error‑free installation.

3. Drop Out Fuse Element Working Principle

Under normal load, current flows uninterrupted through the alloy element and the leader wires. When a fault causes current to exceed the rated threshold, the precision‑alloy element melts along its time‑current curve. An arc forms inside the auxiliary tube; its controlled expansion and heat‑resistant walls extinguish the arc, safely interrupting the circuit. Once operated, the tube drops out of the hinge, giving a clear visual indication of the blown phase.

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4. Drop Out Fuse Element Application Scenarios

• Overhead Distribution Lines – primary overcurrent protection
• Distribution Transformer Feeders – isolating transformer faults
• Outdoor Switchgear & Cutouts – rapid circuit interruption
• Renewable Energy Systems – PV combiner boxes, wind‑farm collection networks
• Substation Feeders (12 kV–40.5 kV) – compliant with IEC 282 for safe network operation

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5. Drop Out Fuse Element Integration Practice

Our fuse elements are engineered to drop seamlessly into standard cutout fuse carriers and fuse‑switch units. The buttonhead‑and‑leader assemblies, together with the auxiliary tube, form compact modules for medium‑voltage switchgear. For turnkey solutions, these fuse links can be pre‑assembled in drop‑out carriers or integrated into modular busbar racks, offering rapid deployment and simplified maintenance.