Eaton 9395XC - Page 107

Eaton 9395XC UPS 1200kW/1200kVA, 1350kW/1350kVA or 1500kW/1500kVA 164001079—Rev 01 89
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Key Operation: Transfer UPS system from Load Bank
1. Open the LBB breaker. Turn key K-LB and remove from the LBB breaker lock and insert it into the MIB
lock.
2. Verify key K-ML is in the LBB breaker lock. If not present, remove key K-ML from one of the other Load
Bank breakers common to the system Load Bank and insert into the LBB lock.
NOTE Multiple systems share a common load bank. A single K-ML key is used to prevent more
than one system from being connected to the load bank at a time. Key K-ML must be
inserted in the Load Bank breaker lock of the system to be connected to the load bank.
Key Operation: Transfer UPS system from Maintenance Bypass
1. Place the UPS in Bypass mode. See the applicable UPS Operation/Installation manual for details on
transferring the UPS to Bypass mode.
NOTE Key K-UO CANNOT be released from the SKRU until the UPS is in Bypass mode. Once
key K-UO is turned and released from the SKRU, the UPS transfer to normal (On
Inverter) will be inhibited.
2. Verify that the ENABLE light on the SKRU is illuminated. Turn and release key K-UO from the SKRU lock.
3. Insert key K-UO into the MIB breaker lock. Turn key K-UO to unlock the MIB breaker. Close the MIB
breaker.
4. Close the MBB breaker. Turn and remove key K-MB from the MBB lock and insert it into the SKRU lock.
The UPS is now in Normal mode (on inverter). The critical load is supported by the UPS.
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The system oneline drawings in this section show the simplified internal structure of the UPS, battery supply,
and basic maintenance bypass. See site specific custom oneline drawings for further detail.
Table 22. Oneline Configurations
Oneline Drawing
UPS Model
System Type
Figure 49 Eaton 9395XC Single Reverse Transfer UPS – Two PM, Common Rectifier
Feed, Common Battery, Dual-Feed Configuration
Figure 50
Eaton 9395XC Simplified Dual-Feed UPS with Maintenance Bypass Panel
Understanding UPS Operation