Emerson 610 installation manual Preferred grounding configuration, impedance-grounded wye

Configuring Your Neutral and Ground Connections

Figure 9 Preferred grounding configuration, impedance-grounded wye

These configurations have the same restrictions as explained in 6.2 - Alternate Grounding Config- uration, Wye-Connected Service, except for the wye input. The UPS input and bypass must be fed from the same source. The load must be strictly 3-wire. And the GFI time delay should be set to at least 0.2 seconds to prevent tripping during transfer or retransfer operations.

! CAUTION

Failure to properly set the ground fault interrupters could cause loss of power to the critical load.

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