Maintenance Bypass Load Transfers-Single Module System: If Load Is On Maintenance Bypass; Conditions To Activate Eco Mode Operation - Vertiv Liebert EXL Operation And Maintenance Manual

3.1.5 Maintenance Bypass Load Transfers—Single Module System: If Load is on Maintenance Bypass
1. Verify that power is available to the module's bypass and rectifier inputs.
2. Verify that the module is started and in Bypass Mode.
3. If using a key interlock system:
a. Depress the key-release unit push button
b. Turn the key and remove it from the key-release unit.
NOTE
The UPS is now locked in bypass and cannot be retransferred to the Inverter until the key is returned.
4. If using a key interlock system:
a. Insert the key into the lock for the Maintenance Isolation Breaker (MIB)
b. Retract the bolt.
5. Close the Maintenance Isolation Breaker (MIB).
NOTICE
Risk of improper operation sequence. May cause equipment damage.
Failure to close the Maintenance Isolation Breaker (MIB) will interrupt power to the load.
6. Open the Maintenance Bypass Breaker (MBB). Load is now on UPS Internal Bypass.
7. If using a key interlock system, remove the key from the lock for the Maintenance Bypass Breaker (MBB) to lock it open.
8. If the maintenance bypass cabinet or switchboard has an optional two-key interlock system, insert the key into the
solenoid.
The UPS system may now be transferred from bypass to UPS (see 3.1.3 - Load Transfer and Retransfer—
Single Module System).
3.1.6

Conditions to Activate Eco Mode Operation

Automatic Eco Mode Activation
The system will activate Eco Mode when all of the following are true:
• Eco Mode session is active
• Bypass Source Qualification is satisfied
• The Load On UPS event has been active for a specified time
• Input Contact Interface 1 (Channel 5) event is not active
• Load kW is greater than 10%
• Backfeed Breaker Open event is not active
• Bypass Static Switch Unable event is not active (SCR Short, SCR Open)
When conditions to activate have been satisfied, the system will coordinate turning on the BPSS and place the
inverter(s) into an idle state (zero power mode).
Manual Eco Mode Operation
The rules that apply to users that initiate the following manual operations while Eco Mode is active:
• When the Eco Mode Active event is set, the system will allow the user to shutdown the system.
• When the Eco Mode Active event is set, the system will allow the user to transfer to inverter.
Automatic Eco Mode Reactivation
When an Eco Mode session is suspended, the system will automatically reactivate Eco Mode when the following
are true:
• Excessive Eco Mode Suspension event is not set.
• Conditions to automatically activate have been satisfied for the full duration of Restart Delay setting.
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Vertiv | Liebert® EXL™ 625-1100kVA Operation and Maintenance Manual | Rev. 8 | 02/17 24