OPTI-UPS SS45K33 - Manual (Page 7)

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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.
Off (0): AVR no action, so the output has no voltage stability function.
On(1): AVR action, so the output voltage is steady.
Voltage and current indicator: (There is no voltage & current meter indication below 50KVA).
Voltage meter (V) indicates the output voltage.
Voltage selector indicates per phase( U V W) with N the output voltage.
6‐ Preliminary warnings to use the AVR
Automatic Voltage Regulator (AVR) are used to protect the sensitive loads from the unstable mains and
to provide proper operating of the load.
Related points for human health are mentioned in “Safety Warnings” part of this manual.
In this part, these points will repeated to give information about the connections of AVR and the load.
• When installing the AVR to use cable with improper diameter can be dangerous for user
health and safety of the unit.
• Earth cable should be chosen concerning the current capacity, which is written on the label on
the front panel of the AVR. All units earth connections, which are connected to AVR, should
be done with this earth cable. Without earth, connection or unproved earth connected units
are dangerous for user health and have high risk of electronic circuit board faults.
The operation environment and cable connection plays very important role to the
function of AVR. It will cause very direct and critical effect to the AVR’s MTBF. Therefore