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What is the induced voltage in a cable tray

What is the induced voltage in a cable tray

In some trays, tens of wires lie in direct contact with high amperage flowing through them. The result is a tray full of expanding and collapsing magnetic fields in the vicinity of current-carrying conductors. If the sheath or armour is unbonded, or bonded at. Many people think induced voltages only happen in outdoor, high-voltage substations. While that's the biggest danger from induced voltages, low-voltage circuits run in cable trays can also induce a voltage into de-energized cables that are in the same cable tray (see Figure 1). Parallel conductors exhibit both mutual inductance and capacitance.
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Induced Voltage

The result is a tray full of expanding and collapsing magnetic fields in the vicinity of current-carrying conductors. In this setting, the

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Largest induced armor voltage on the cables installed on tray

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