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by MisterTea
1774 days ago
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DC is used where you want direct battery backup, meaning the battery bank voltage is directly supplied to the equipment. This makes the system more reliable as there are no power supplies or inverters to fail. The system can then be composed of simple fuses, breakers, switches and relays to control power flow. You can even design the system so that the batteries are in parallel with the power supply and load making the system uninterruptible by default. A lesser known standard is 110V DC used in electrical substations and switchgear. They cover a lot of ground and cable runs can be hundreds of meters so the higher voltage allows longer distances with minimal line loss. |
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