AVR Industrial‐Grade High Efficiency A.C Voltage Regulator USER’S MANUAL OPTI‐UPS International Corporation reserves the right to make engineering changes on all its products. Such refinements may affect information given in the instructions. Therefore, USE ONLY THE INSTRUCTIONS THAT ARE PACKED WITH THE PRODUCT. WARNING: High voltages are present inside this unit during operation. Do not operate this unit unless all covers are in place.
CONTENTS 1‐ The Protection and Maintenance of AVR 3 2‐ Safety warnings 4 3‐ Description of the symbols used in this manual 5 4‐ Introduction 6 5‐ Functions Introduction 7 6‐ Preliminary warnings to use the AVR 7~8 7‐ Operating procedures 8~9 8‐ The Operation Procedures of Maintenance By Pass Switch 10 9‐ Maintenance & Cleaning 10~11 10‐ Trouble shooting Guide 11 11‐ Storage 11 12‐ Technical specifications 12 13‐ Machine schematic v
1‐ The Protection and Maintenance of AVR 1. Please clean and maintain the AVR periodically to keep from dust for lasting machine life. 2. Please use soft cloth for wiping, and please don’t use sandpaper as detergent. 3.Please check every kind of connection wires every month periodically to prevent the loosing or abrasion. 4. Please place the unit on a flat or even surface. 5.
2‐ Safety warnings For the user’s own safety, the safety of data and this product read the following safety instructions carefully before using the unit! ‐ This system has been designed to provide all the necessary safety conditions needed to protect electronic office equipment including information systems. In case of any questions, refer to your authorized technical service representative. ‐ In order to avoid any damage to the equipment, it is advised to transport it in its own packing.
3‐ Description of the symbols used in this manual The following symbols have been used in this manual. This symbol gives information regarding points important for user’s own health and safety, AVR operation and the safety of your data. This symbol gives information, warnings, and other suggestions. This symbol shows the operations that need to be executed.
4‐ Introduction Input power is applied across the motor driven variable transformer which has a “center tap” that divides the variable transformer into bucking and boosting voltage areas.The buck‐boost transformer is a fixed ratio isolation transformer capable of high amperes at low voltage. The ratio of the buck‐boost transformer is determined by the amount of voltage needed to buck or boost the input line voltage to maintain the specified output level.
MCCB1: Mold cast circuit breaker Main power switch MCCB2: Mold cast circuit breaker Maintenance bypass switch. Please remember that MCCB2 is used only for service technician. Non‐maintenance personnel must not open it to use, otherwise, AVR could be break down because of improper operating. On push switch (red button): Controlling the output (On) action. Off push switch (green button): Controlling the output (Off) action.
it is essential to follow the instructions of installation and cable connection. Requirement of operation environment： The operation environment plays a vital role for an AVR , both the function and the endurance of AVR will all be easily affected if the environment does not meet its requirement listed below： 1. Ambient temperature：0℃ ~ 40℃. 2. Keep off the oil and the salt. 3. Keep off dust, fluff and metal dust. 4. Avoid installing on a vibratory machine. 5.
• Automatic Voltage Regulator • User Manual By the help of rolling wheels, carry the unit to a suitable location to install it. Plug the input power cable of AVR to properly earthed mains. Check the connections before changing the position of the input, output, and bypass switches to suitable positions. Proper operation procedure makes AVR function more smooth and prevent from various unnecessary troubles.
Maintenance By‐pass : □ Close Mold cast circuit breaker “Off” of every load. □ Pushing the green button “Off” on front panel, although there is no output voltage, the AVR is still in action. □ Switch MCCB(1) Mold cast circuit breaker to “Off” position. □ Switch MCCB(2) Mold cast circuit breaker up to “On” position. □ Using Ture RMS voltage meter to measure the O/P N, U V W on the terminal board, if the output voltage is correct, AVR is by‐pass successfully.
‐Inspect the variable transformer drive belts, sprockets, gears, cams, etc. for signs of slippage or wear and adjust as required. ‐Check the variable transformer radiator(s) (the die cast part that holds the brush assembly) for signs of slippage, and see if all brushes driven by the same motor are aligned with each other.
. Technical specifications Input Characteristics Capacity: 20 KVA Voltage Range: 380Y/220 Volt, +25% to ‐ 25% at 50 Hz for regulation.
8 7 6 5 4 3 2 1 F F E E D D C C B B [Right side view] [Front view] [Isometric view] Page 1 A 8 7 6 5 A 4 3 2 1
8 7 6 5 4 3 2 1 F F Lifting lugs E E Fan Push botton Variable transformer Control board D D Waterproof flat lift-and-turn latch Fan Main MCCB Buck-boost transformer Bypass MCCB Magnetic contact C C Ventilator filter unit Fuse holes Isoation transformer Input/Output teminal board MOV Conduit entrance B B Conduit entrance Enclose mounting holes Page 2 A 8 7 6 5 A 4 3 2 1
8 7 6 5 4 3 2 1 F F E E D D R S T N G U V W N G C C Input/Output terminal board Cable INPUT OUTPUT Cable B B Page 3 A 8 7 6 5 A 4 3 2 1
8 7 6 5 4 3 2 1 F F Main MCCB Off Main MCCB On E E ON OFF D D Bypass MCCB Main MCCB Bypass MCCB off Bypass MCCB On C C ON OFF B B Page 4 A 8 7 6 5 A 4 3 2 1
8 7 6 5 4 3 2 1 F F E E F1 F2 F3 D D Fuse B C C B B Page 5 A 8 7 6 5 A 4 3 2 1
8 7 6 5 4 3 2 1 F F E E AVR control board U PHASE V PHASE W PHASE A D D Output voltage adjust C B C B Page 6 A 8 7 6 5 A 4 3 2 1
8 7 6 5 4 3 2 1 F F E E D D MOV C C B B Page 7 A 8 7 6 5 A 4 3 2 1
8 7 6 5 4 3 2 1 F F E E D D Hole plug x4PCS C C Filter x3 PCS Maingbod B B Note : Clean the ventilator occasionally to maintainits normal function Use a vacuum cleaner or compressed air to clean the filter Page 8 A 8 7 6 5 A 4 3 2 1
8 7 6 5 4 3 2 1 F F E E D D C C D B B Page 9 A 8 7 6 5 A 4 3 2 1
