11.7Grounding Configuration
This section describes the grounding configuration to be used with various AC service entrance configurations.
Inadequate grounding will cause problems at
11.7.1Recommended configuration (for 4 wire input with Input Neutral grounded)
Figure 11.12 shows recommended grounding configuration when the input neutral is grounded.
The neutral line at the input source is usually grounded. The neutral terminal in the UPS cabinet should be disconnected from the ground bus. The neutral connection for the UPS bypass input should be grounded.
Input Source | < UPS Cabinet > |
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3φ 3φ
N
N
3φ 3φ
GG
3φ | 3φ |
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N | N | To the |
G | G | Load |
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Remove
Jumper Cable
FIGURE 11.12 - GROUNDING CONFIGURATION WITH INPUT NEUTRAL GROUNDED
A 2 AWG (or 38 mm2) jumper cable is provided between the neutral terminal and ground bus in the UPS cabinet. The qualified personnel should remove the jumper cable in this configuration. The jumper cable location is illustrated below.
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Ground | Terminal |
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Bus |
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Neutral
Terminal
Remove
Jumper
Cable
FIGURE 11.13 - JUMPER CABLE BETWEEN THE NEUTRAL TERMINAL & GROUND BUS
40 | G8000 Series Installation and Operation Manual |
