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G8000 Series Installation and Operation Manual
11.7.2 Grounding Conguration (without input neutral)
When the input source is wye-connected, the neutral line out to the bypass input should be left open. The
UPS is grounded by connecting the neutral terminal to the ground bus with the internal jumper cable. See
Figure 11.18.
The jumper cable should stay in place. See Figure 11.17 for the jumper cable location.
If a ground fault interrupter is installed, the UPS is likely to trip the interrupter during transferring to/from
the bypass circuit. It is recommended that the ground fault interrupter be set to a minimum delay of 0.5
seconds.
FIGURE 11.18 - GROUNDING CONFIGURATION WITHOUT INPUT NEUTRAL
11.7.3 Recommended Conguration (for delta-input)
If the input source is a delta-connection (3-phase 3-wire) without ground, the neutral terminal in the UPS
cabinet must be connected to the ground bus with the internal jumper cable as shown in Figure 11.19.
The jumper cable should stay in place. See Figure 11.17 for the jumper cable location.
FIGURE 11.19 - GROUNDING CONFIGURATION FOR NON-GROUNDED DELTA-INPUT
N
G
3
φ
3
φ
3
φ
N
G
< UPS Cabinet >
N
3
φ
3
φ
G
Input Source
Remove
Jumper Cable
G
N
3
φ
To the
Load
N
G
3φ
3φ
3
φ
N
G
< UPS Cabinet >
N
3φ
3
φ
G
Input Source
Jumper Cable
Remains in Place
G
N
3φ
To the
Load
N
G
3
φ
3
φ
3
φ
N
G
< UPS Cabinet >
3
φ
3
φ
G
Input Source
Jumper Cable
Remains in Place
G
N
3
φ
To the
Load
N
G
3
φ
3
φ
3
φ
N
G
< UPS Cabinet >
G
N
3
φ
3
φ
To the
Load
Out
p
ut Distribution
3
φ
3
φ
G
Input Source
B
φ
Remove
Jumper Cable
N
G
3
φ
3
φ
3
φ
N
G
< UPS Cabinet >
N
3
φ
3
φ
G
Input Source
Remove
Jumper Cable
G
N
3
φ
To the
Load
N
G
3
φ
3
φ
3
φ
N
G
< UPS Cabinet >
N
3
φ
3
φ
G
Input Source
Jumper Cable
Remains in Place
G
N
3
φ
To the
Load
N
G
3φ
3φ
3
φ
N
G
< UPS Cabinet >
3φ
3
φ
G
Input Source
Jumper Cable
Remains in Place
G
N
3
φ
To the
Load
N
G
3
φ
3
φ
3
φ
N
G
< UPS Cabinet >
G
N
3
φ
3
φ
To the
Load
Out
p
ut Distribution
3
φ
3
φ
G
Input Source
B
φ
Remove
Jumper Cable