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Short Circuit Testing

In spite of the electrical protection equipment of the network, energy transfer will always present risks to people and property. CABLOFIL is able to manage these risks with its high performance cable supports.

Short Circuits

A short circuit occurs when a connection is accidentally established between two points in an electric circuit at different voltages.

It presents a risk to both property and people.

Depending on where it occurs, very large currents may be generated, which will often result in a fire.

The main causes of short circuits are as follows:

  • Damage to insulating material as a result of wear and tear or mechanical impact
  • Broken conductors
  • Conducting elements falling onto or otherwise coming into contact with the circuit

Cable
Short Circuit Tests
Cable Tray

Tests were performed at a recognized independent laboratory (DAMSTRA) and in accordance to standard EN 50 368 (2003) in order to validate CABLOFIL's mechanical resistance to the stress generated by a short circuit.

An initial short circuit is generated during the tests, creating mutual electromagnetic repulsion between the power cables.

The cable tray is then subjected to substantial mechanical stress for a very short time (approx. one second). The process is repeated in order to show that CABLOFIL is structuraly intact and able to cope with another short circuit. As a final measure, additional tests are performed in a damp environment to check whether the cables are fully intact.

The various tests are run with 3 successive levels of short-circuit current:

  • 70 kA, equivalent to a repulsive force of 1300 daN
  • 100 kA, equivalent to a repulsive force of 2700 daN
  • 130 kA, equivalent to a repulsive force of 4500 daN

Material used: 3 m of CF105/450, coupling 1/5th of the way along the span, 5 EDRN couplers and a support span of 1.5 meters

System configuration: 3 single-conductor power cables, 38 mm in diameter, are attached every 600 mm using cleats.

Damstra
Cable
Cable
Cable
Conclusion
Chart

The tests reveal that the wire cable tray shows no permanent deformation, its mesh structure is able to absorb the physical stress generated by a significant short-circuit current.

The cables remain intact in their original positions and network availability is maintained.