Xtreme Power Conversion Corporation
TX90 6kVA & 10kVA Service Manual
Page 21
Uninterruptible Power Supply
“Bypass” mode. In the upper right-hand corner of the LCD a
sign will appear.
4. Turn off the UPS Utility breaker. You may proceed with UPS maintenance now.
5. When you are done with UPS maintenance put the UPS back into normal working mode as explained
previously. Then return the CAM switch to “INV” mode, replace the cover. The UPS will switch back to
inverter mode.
6. The UPS will alert for ten seconds to warn that the procedure is abnormal and may damage the UPS
due to uncertain utility status. The UPS will switch back to Inverter mode immediately if you turn the
CAM switch back to “INV”.
System Block Diagram and PCB Wiring Diagram
System Block Diagram
a. UPS Utility Input: to provide the AC source to the UPS rectifier circuit and charger.
b. UPS Bypass Input: to provide the AC source to the UPS Bypass Input and Maintenance Bypass loop.
c. UPS Utility Input Breaker: to protect the UPS Rectifier circuit from over-current.
d. UPS Bypass Input Breaker: to protect the UPS Bypass circuit from over-current.
e. EMI Filter on UPS Utility Input : to eliminate the magnetic interference from AC Source or UPS Utility Input.
f. EMI Filter on UPS Bypass Input: to eliminate the magnetic interference from AC Source or UPS Bypass Input.
g. Fuse for UPS Utility Input: to provide over-current protection for UPS Rectifier Circuit.
h. Rectifier and Booster: When Utility is normal, they will converts the AC to DC and correct input power factor.
When Utility is abnormal, the batteries will be boosted to provide the DC voltage to the Inverter.
i. Input fuse for Battery: to protect batteries when DC-Booster is out of order.
j. Charger: the battery charging device.
k. Internal Battery: When AC abnormal, it provide the backup power from the batteries.
l. External Battery Bank: To provide longer backup time by adding additional Battery bank.
m. Inverter Generator: To convert the DC voltage to AC voltage
n. Inverter Output Switch: Only when the UPS is overloaded or abnormal, or the UPS is working on ECO mode or
if EPO(Emergency Power Off) is activated, the Switch will be opened.
o. Auto Bypass Loop: When the UPS is overloaded or abnormal, the UPS will Switch the UPS from inverter output
to bypass output automatically.
