2.3.1.4. TENSION RELEASE VOIED
Tension release VOIEDs incorporate a switch that is held open by tension, normally in a wire, and are similar in design to a pressure release IED.
The following example is a tension release IED protecting a former fighting position. When the target makes contact the tension is released by the wire breaking, a spring causes the switch to close and the electrical connection is complete. This example incorporates an improvised ‘claymore’ type main charge that is designed to produce fragmentation over a wide area to deliver maximum effect.
Improvised claymore main charge
Tension release wire
Image 10. Tension release IED positioned to protect a defensive position
The IED consists of a wire under tension running across a road, which is holding open an improvised ‘rocker’ switch. This switch is constructed from a plastic box with a sprung lid. When the lid is open a microswitch inside the box is in an open position and when the tension is released the lid closes which in turn closes the microswitch, completing the circuit and causing the IED to function.
Tension release wire
Tension release switch
Improvised claymore main charge
Power source
Fragmentation
Electric detonator
Image 11. Tension release IED components in detail
IED tactics
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