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OVERLOAD PROTECTION:
UPS output transform from inverter to bybass mode when load is 105% of rated load(VA, or wattage) is going on running on for 10 seconds.When the load is higher than 130% of rated load,the UPS transfers to bybass immediately.
BATTERY VOLTAGE ABNORMAL PROTECTION:
When battery voltage is unnormal on battery-under or battery-higher level,then the panel is indicated fault and shut down.
INVERTR OUTPUT ABNORMAL PROTECTION:
The pannel is indicated the fault when inverter abnormal.
OVER TEMPERATURE PROTECTION:
CNTL dectects the temperatue of PSDR heatsink by the thermal switches are electrically connected to the CPU.When over temperature,the pannel will indicated the fault condition.
2.3.2 INTERFACE SINGAL TRANSMITTING: To show the UPS status on the computer
via cmmunication interface soft.
2.3.3 VOLTAGE REGULATION & CONTROL UNIT:Definitely, brain of UPS is CNTL.It provides control singal to switching elements,regulates UPS output to supply stable SINE wave to load.
PANEL LED AND BUZZER INDICATION
PANEL LED INDICATE
When UPS occurs as flowing:
BUZZER and LED INDICATE
When UPS occurs as flowing:
Low battery voltage: beeping every seconds
e. Replace battery: The load and battery LED is flashing alternately and beeping every second.
c. Back up mode: beeping every four seconds
d. Silence:Push ’turn on ‘ key to silence your ups that buzzer to stop beeping.
e. Fault: continuous beeping
f. Over load is 105~130%: all LED are lighting on and beeping every second
note 1:When UPS occurs fault and AC line normal,then UPS stop output and AC line input realy switch.Until pushing ‘off’ button,UPS turn off lastly.
ALIGNMENTS
Definition of variable resistors on PSDR
| VR | definition |
| VR1 | Accurate 5V±0.01% renference voltage adjustment |
| VR2 | Battery voltage adjustment |
Adjustment
| PCB | MEASURE | MEASURE POINT | MEASURE AND ADJUSTMENT SEQUENCE | EXPECTED RESULT | |
| PSDR | DC(+)BUS | P16(+) O/P_N | Connect DVM (DC) to measure points and connect I/P ac power cord,then turn on switch. | ULT-700 +380VDC±10V +190VDC±10VDC ULT-1500 | |
| DC(-)BUS | P16(-)BUS O/P_N | Connect DVM (DC) to measure points and connect I/P ac power cord.then turn on the switch. | |||
| CHARGER | P15(+) P15(-) | 1.Disconnect Bat(+),Bat(-) 2.Connect DVM(DC) to measure points and connect I/P AC power cord, 3.Adjust VR2 to obtain the expected result. 4.Reconnectet Bat(+),Bat(-) | |||
| CNTL | NO NEED ANY ADJUSTMENT! |
VOLTAGE TYPE ADJUSTMENT
UNINVERAL INPUT VOLTAGE TYPE AND UNIVERAL OUTPUT ADJUST.Its position see FIG -
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