UPS battery cabinet negative grounding

What happens if a UPS system has a battery ground fault?

The same condition will exist in a UPS system with a (single) battery ground fault. The unit will continue to run, but a battery ground leakage detection monitor will sense the ground current, and then can trigger an alarm on the monitor, and/or through a “building alarm” in the UPS.

Does my ups need a grounding system?

Without a properly installed grounding system, your UPS won't function correctly. A grounding system allows circuit protection to clear a ground fault, and provides paths for diverting surge current away from the UPS and for removing undesirable currents from the critical load. So what can you do to ensure your grounding system allows your UPS

How do you ground an ups cabinet?

Finally, bond UPS cabinets to the nearest interior ground bus, using a green, insulated 2 AWG grounding wire. Installers typically mount the main ground bar (MGB) of a UPS room 24 in. above the finished floor and use zones for best grounding results. Your UPS will do its job only when it has the right infrastructure to support it.

What happens if a grounded user touches a battery terminal?

The concern is that, if a grounded user touches a battery terminal, there is a direct path back to through the rectifier/charger semiconductors to the UPS ac input voltage, (or through the inverter to the UPS ac output voltage). Some UPS designs “float” the battery system, using transformers on both the UPS input and the UPS output.