Vertiv Liebert EXS 80kVA UPS, Руководство пользователя

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Vertiv™ Liebert EXS 80kVA UPS User Manual
5 UPS Operating Instructions
3. Close the maintenance bypass switch Q3. At the moment, the maintenance bypass parallels with the
UPS bypass.
4. Unplugging the EPO terminal disconnects the output switch Q5, main input switch Q1, bypass input
switch Q2. At the moment, all the internal power supply is off and the LCD does not display any more,
and the maintenance bypass power the load normally.
CAUTION: When the UPS is in maintenance bypass mode, the load is not protected against
abnormalities in the mains power supply.
NOTE: In maintenance mode, the load is directly fed by the mains power instead of the pure AC power
from the inverter.
WARNING! 1. If the maintenance is required, wait 10 minutes for the internal DC bus capacitance
discharging.
2. The parts of UPS circuits also have hazardous voltage, though the rectifier input switch,
bypass input switch and battery switch are disconnected. Therefore, the UPS maintenance is
applicable to qualified personnel only.
5.3.5. Transfer from Maintenance Bypass Mode to Normal Mode
Following UPS maintenance operations, the following procedures may be used to transfer the load from the
maintenance bypass to the inverter.
1. Push the baffle of maintenance bypass switch Q3 leftwards to the end position, and keep it stay this
position.
2. Close the output switch Q5, main input switch Q1 and bypass input switch Q2 in turn. Confirm that the
LCD is on and the UPS runs in Bypass mode.
3. Following the LCD start-up, ensure that the system is operating in Bypass mode. Set maintenance
bypass switch Q3 to off. Return the Q3 baffle to its original position, then fasten the fixing screws.
4. Press the power button on the operator and display panel of the UPS so that the UPS transfers to
Inverter mode.
WARNING! It is important to close the bypass switch before opening the maintenance bypass
switch; otherwise the power supply to the load will be interrupted.
5.4 Battery Test Procedures
The battery test function is disabled by default. If you need this function, please contact the customer
service engineer of Vertiv.
Battery test type and preconditions
1. There are two battery tests to select from:
• Battery maintenance test: verifies the battery integrity and leads to the battery being partly
discharged (20%).
• Battery capacity test: verifies precisely the battery capacity and leads to the battery being fully
discharged (until Battery low pre-warning alarm)