UDD-SD-116/
Release Date: 31.12.2014/Rev No: 1/Rev.
Date
: 27.04.2015
14
★
Option4:
GND
L1 N1 L2 N2
To Load 1
To Load 2
To Load 3
L2 L1
After connecting N1
＆
L2, it becomes three outputs, one high-voltage((208v/220v/230v/240V)
at L1-N2 two low-voltage outputs (100v/110v/115v/120V) at L1-N1 and L2-N2. However, there
is a limit for current rating at L1-N1 and L2-N2: 25A is for 6KVA model and 42A is for 10KVA
model. You must connect the load under the limitation. Please read Note first before installation.
Connect low-voltage load to L1-N1 and L2-N2, and connect high-voltage load to L1-N2.
NOTE
1.
if any load current in L1-N1 or L2-N2 is higher than 25A in 6KVA model and 42A in 10KVA
model. The UPS will still operate normally without overload warning because the total load is
under the specification. However, the isolation transformer will be damaged with overheat
due to high current. Hence, the installation must be done with technician and make sure that
the load current does not exceed this limitation.
2.
When connecting to low-voltage and high –voltage at the same time like option 4, it will cause
the L1-N1
＆
L2-N2 with low-voltage loads in Non-Isolated status, we recommend that you
may only use two low-voltage at L1-N1 or L2-N2 like option 1, and also make sure that the
total current in L1-N1 or L2-N2 does not exceed the value on Note 1
.
3.4 Parallel System of 6-20K UPS Installation
Only 6-20K UPS and containing parallel ports can do parallel operation, other types is not
supported.
N+X parallel structure is the most reliable power supply structure at present, N stands for the
minimum number of UPS for the load, X stands for the number of redundant UPS
，
X absolutely
means how many UPS could be malfunctioning at the same time and the parallel UPS system is
still steady. The larger X is, the system is more reliable. N+X is the best method for high
reliability. Just install a little more simple accessories, at most 8 UPS could work together to form
a flexible parallel system.
This structure of power supply system increases the power safety and reliability. For example,
two single UPS make up a parallel system to load averagely, when one is malfunctioning, another
one can take all the load independently. It allows isolation repairs for malfunctioning UPS, and
