3
3.2
UPS Module
The UPS module provides utility power to load when line is qualified. And an automatic voltage regulator (AVR)
is embedded to provide stable power to the load. It will instantly switch to emergency backup power during
utility power failure or interruption. The front panel view is shown as below.
Figure 2: Front Panel of UPS
AC Input Terminal Block
This terminal block is the UPS AC line power input.
AC Input Breaker
This circuit breaker is an on/off switch for the line power into the UPS that also provides input protection. It
must be switched on for proper UPS operation.
AC Output Terminal Block
This terminal block is the UPS AC power output.
AC Output Breaker
This circuit breaker is a resettable protective thermal circuit breaker to protect UPS output from overload and
short circuits.
Input Contact
To activate a programmable alarm by shorting this input contact.
Dry Contact
Six sets of dry contacts will energize when programmable event occurs.
Internal Fan
It’s to cool down inside temperature of the UPS. The fan is flexibly replaced for maintenance.
GND
This connector is permanent ground of the UPS.
Battery Connector
The battery connector is to connect external batteries.
Mounting Bracket & Handle
This part is for unit mounting on the size of 19’’ cabinet and for people moving unit conveniently.
Battery Temperature Connector
This is used to monitor battery temperature. The temperature probe connector must be plugged in UPS for
normal operation. The other end should be firmly attached to the terminal of the battery.
