MAKELSAN LEVELUPS Series - Operation and Maintenance; Operation Procedure Overview; Circuit Breakers and Controls Explained

LEVELUPS SERİSİ 10-20 KVA OPERATION
AG-SD-83 / Publication Date: 15.09.2014 / Rev. No: 0 / Rev. Date:
4 OPERATION
4.1 Operation Procedure
You can find informations about circuit breaker, first start-up , types of UPS operation tests ,
turning UPS off , EPO and RS232 serial communication system in this section.
4.1.1 Circuit Breakers
There are four circuit breakers on the rear side of the device.
These are used for the AC input, maintenance bypass, output and the battery connections
respectively.
Three-phase AC voltage is applied through CB1 to input of UPS.
AC input voltage will be applied directly to loads through CB2. In this way, maintenance
purposed switching is done properly. If UPS is actived while it is working thanks to auxilary
short circuit info located in CB3, mains makes the bypass static switches actived. The system will
be switched to maintenance mode smoothly.
CB3 is used to connect or seperate AC voltage that come from static switches to the loads on
UPS.
External batteries are connected to UPS through CB4.
CB5 is used as an external bypass switch.
Active Brakers
Operation Mode
Explanation
CB1, CB3,
CB4.CB5
Normal Mode
UPS operates in normal mode.
CB1, CB3,
CB4,CB5
Static Bypass Mode
UPS is overloaded; loads will be transferred to
static bypass line temporarily.
CB2
Maintenance Mode
UPS is shut down for maintanence, loads will be
fed through mechanical bypass line.