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Related Manuals for Centralion 400VA
Summary of Contents for Centralion 400VA
- Page 1 UNINTERRUPTIBLE POWER SYSTEM SERVICE MANUAL Blazer series 400VA,600VA and 800VA Model: 400VA: 400VA/115V,400VA/230V 600VA: 600VA/115V,600VA/230V 800VA: 800VA/115V,800VA/230V 115V/220V/230V/240V 50Hz/60Hz Prepared by Fulin April 9, 2002...
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Page 2: Table Of Contents
Table of Contents Chapter Introduction Block Diagram C. Control Power Circuit D. Battery Charger E. Line And Zero-Crossing Detection F. Inverter Operation G. Active Clamp H. Microcontroller(CPU) Control Circuit I. Displays ,Audio alarm and control button J. Load Detection Circuit K. - Page 3 Index of Figure Electrical circuit Schematic diagram Figure S-1 Control Power Circuit Figure S-2 Charger Circuit Figure S-3 Line and Zero Crossing detecting Circuit Figure S-4 Inverter Circuit Figure S-5 CPU Circuit Figure S-6 Relay Circuit Figure S-7 Panel Circuit Figure S-8 Load Detecting Circuit Figure S-9 RS232 Circuit Waveform &...
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Page 4: Introduction
A. Introduction Blazer series is an off-line power System that has a square wave output. It prevents impulse, surge, sag and power outage situations. It provides the UPS output load with a reliable source. It has the following functions: Booster: If the commercial line is under voltage, the Booster will rise the UPS output voltage to 1.18 times its input voltage. -
Page 5: Block Diagram
B. Block Diagram The Block diagram of Blazer series (refer to Figure S-1) is divided into the following parts: a) Main relay (MAIN-RY): To switch the UPS between line and battery mode. Its mechanical action also affect the UPS power loss time. b) Booster Relay(BOOST-RY): At line mode, this is a switch used to increase UPS output voltage 18% when the commercial line source is under voltage. - Page 6 The UPS display device contains one led and one switche . l) Batteries: Acts as a power supply source while the UPS is at battery mode. Different types of batteries are used for different models of UPS: 600VA : 12V7Ah *1 pc 400VA : 6V4Ah *2pc 800VA : 1245W*1pc...
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Page 7: Control Power Circuit
C. Control power circuit The control power (+12V and +5V ) comes from the following cases(Figure S-2) 1) Start without input AC power (Cold start): A “Cold start “ is described as follows: When “ON/OFF” switch(SW1) is depressed, a positive battery current flows through SW1 to charge C15. -
Page 8: Figure S-1 Control Power Circuit
Figure S-1 Control Power circuit... -
Page 9: Figure W-1 Cold Start
CH1 : C15 Figure W-1 Cold Start... -
Page 10: Battery Charger
D. Battery Charger The action of charger is described as follows : (Figure S-3) When UPS connected to AC source, the CPU was active because the control power (+5V) was established. The CPU turned on MAIN RELAY(RY01),AC power flow into Main Transformer. Source for the charging circuit comes from the charger coil of the Main Transformer. -
Page 11: Figure S-2 Charger Circuit
Figure S-2 Charger circuit... -
Page 12: Line And Zero-Crossing Detection
E. Line And Zero-Crossing Detection Please refer Figure S-4 1) Line Detection The input voltage is full-rectified The signal passes through a voltage divider at R45 and R40//r47,feed into pin 8 of CPU. By monitoring this rectified sinusoidal voltage, the CPU can find the unnaturalness of commercial line. -
Page 13: Figure S-3 Line And Zero Crossing Detecting Circuit
Figure S-3 Line and Zero Crossing Detecting circuit... -
Page 14: Figure W-2 Zero Crossing
CH1 : Line-I/P CH2 : Q14 collector Figure W-2 Zero Crossing... -
Page 15: Inverter Operation
F. Inverter Operation The Inverter circuit (Figure S-5) and PWM control are only active under Battery mode. The Inverter circuit of Blazer is based on a push-pull circuitry and its output is driven by transistors which is controlled by CPU. Refer to the Inverter circuit diagram, the DS1(PWM signal ) and DS2 (PWM signal) signals are generated by CPU. -
Page 16: Figure S-4 Inverter Circuit
Figure S-4 Inverter circuit... -
Page 17: Figure W-3 Inverter Circuit
CH1 : DS1 CH2 : Output Voltage (1/200V) Figure W-3 Inverter Circuit (1) -
Page 18: Figure W-4 Inverter Circuit
CH1 : DS2 CH2 : Output Voltage (1/200) Figure W-4 Inverter Circuit (2) -
Page 19: Active Clamp
G. Active Clamp The purpose of Clamp circuitry (Figure S-5) is to pull down the output voltage while two sets of Inverter MOSET are OFF. The Clamp circuitry is active during the period of zero Volt. of square wave at battery mode. The Q22 is activated while the CLAMP-OFF signal (from pin 27 of CPU) goes to HI . -
Page 20: Figure W-5 Clamp Circuit
CH1 : CLAMP-OFF signal CH2 : output voltage (1/200V) Figure W-5 Clamp circuit... -
Page 21: Microcontroller(Cpu) Control Circuit
H. Microcontroller(CPU) Control Circuit The CPU is supplied by a 5 volts. power supply to pin 25 with ground pin at pin 24. An extra oscillation circuitry ,(consisting of C03,C04,and crystal XL1) is connected to pin 22 &23. The Blazer series use a CPU type NEC µPD78F9116A and its oscillator frequency is 5.0 MHz. - Page 22 line mode to battery mode, CPU pin 15 is set to LOW and turn off Q03. This causes RY01 to be OFF and return to its normal state. R16,D02,C10 and Q04 are used to speed up the relay action, so the power loss time can be reduced to minimum.
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Page 23: Figure S-5 Cpu Circuit
Figure S-5 CPU circuit... -
Page 24: Figure S-6 Relay Circuit
Figure S-6 Relay Circuit... -
Page 25: Figure W-6 Relay Speed Up Capacitor
CH1 : C10(+) CH2 : Output Voltage (1/200V) Figure W-6 Relay speed up capacitor... -
Page 26: Displays ,Audio Alarm And Control Button
I Displays ,Audio alarm and control button 1) Display (Figure S-8) There are and one led on front panel . While switch on, CPU sends a HI signal passes through LED to turn on LED. 2) Audio alarm The buzzer is controlled by pin 2 of CPU. When CPU send a HI signal to buzzer from pin 2, buzzer is beeping. -
Page 27: Figure S-7 Panel Circuit
Figure S-7 Panel circuit... -
Page 28: Load Detection Circuit
J. Load Detection Circuit The load detecting circuit is showed on Figure S-9. The output current is sensed by current transformer CT01. It decrease 1000 times of output current for CPU detection. The current signal decreased from CT01 pass through a full bridge rectifier and across R36 to get a voltage signal. -
Page 29: Interface Circuit
K. Interface Circuit The interface circuit (refer Figure S-6) consists three kinds of signal – relay signal, RS232 series communication, and plug & play for Windows 95. The communication port is a D type 9 pin connector and its pin definition is : pin1 : N.C pin2 : RS232 transmit pin3 : RS232 receive... -
Page 30: Troubleshooting
L. Troubleshooting WARNING 1. Troubleshooting can be done by qualified engineer or technician only. 2. Use isolated AC source for your oscilloscope to prevent floating voltage problem between UPS chassis ground and system reference ground. 3. Before opening the cover, turn off the main switch and unplug the input power cord. 4. - Page 31 2.1 Battery mode examination (please refer flowchart) Procedure : 1 .(1) Replace batteries by DC power supply and turn on it. (2)Check if there is current limit phenomenon for DC power supply. One or more MOSFETs (Q20,Q23~25) is D-S short. Check and replace it. If MOSFETs have been replaced once, replace the PCB.
- Page 32 2.2 Line mode examination (please refer flowchart) If battery mode procedure are OK then check the following procedure.: Procedure : 1 (1)Plug in input power cord at right voltage range. Check if mani relay RY01 are active (230/240V models). Check UPS if remains at line mode (for 120V models). 2.
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Page 33: Figure W-7 Battery Mode Examination Flowchart
Figure W-7 Battery mode examination flowchart Figure W-8 Line mode examination flowchart...