18 Chapter 2 Installation

E1-20010329-C-1.0

Figure 2-11（b） Wire connection for 15/20kVA Master-slave hot standby UPS

Please refer to section 2.3.2 Installation Procedures( item 3 ) for wire connection requirement for 15/20kVA Master-slave hot standby UPS.
Note
Confirm the right connection of hot line and neutral line and proper earthing. For hot standby UPS, the batteries of master UPS and slave UPS must be connected separately.

NUVWLN

+-+- B_LL1 B_N

NUVWLN

-++- B_LL1 B_N

Input GND
Backup UPS
Input W phase line in parallel
Input V phase line in Parallel
Input U phese line in Parallel
Input Neutral line in Parallel
Input GND in Parallel
Output GND in Parallel
Output phase line of Backup UPS is connected to the L
terminal of Master's bypass
Output neutral line of Backup UPS is connected to the N
terminal of Master's bypass
Master UPS
Input Neutral line
Input V phase line
Input V phase line
Input W phase line
Output phase line
Output Neutral line
Output GND