Toshiba 45, 11.7 Grounding Conguration, 11.7.1 Recommended conguration (for 4 wire input with Input Neutral grounded)

45
G8000 Series Installation and Operation Manual
The UPS battery cabinet and bypass breaker should be wired as shown below in Figure 11.15.
FIGURE 11.15 - CONNECTION BETWEEN UPS, BATTERY CABINET & BYPASS BREAKER
11.7 Grounding Conguration
This section describes the grounding conguration to be used with various AC service entrance congurations.
Inadequate grounding will cause problems at start-up. Connections for the ground line and the neutral line
must be made appropriately according to the system conguration.
11.7.1 Recommended conguration (for 4 wire input with Input Neutral
grounded)
Figure 11.16 shows recommended grounding conguration 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.
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TC
TB1
Battery Cabinet
Overheat
B-Contact
Bypass Breaker
Ext. EPO (Customer) N.O. Contacts
UPS Cabinet
Jumper wire if battery
OH is not applied
To Bypass
Input
To DC
Input
Power Source
for trip coil
Power Source
Auxillary A-
contact