37
L20, L30
Make sure each UPS input breaker is in “off”
position and there is not any output from each
UPS connected. Battery groups can be connected separately or in parallel, which means the
system itself provides both separate battery and common battery.
WARNING!
Make sure the N, L1, L2, L3 lines are correct, and grounding is well connected.
5.11.2.
Parallel cable installation
Shielded and double insulated control cables available must be interconnected in a ring
configuration between UPS units as shown below. The ring configuration ensures high
reliability of the control.
Figure 29 Requirement for the parallel system
A group of paralleled UPS systems behaves as one large UPS system but with the advantage
of presenting higher reliability In order to assure that all UPS are equally utilized and comply
with relevant wiring rules, follow the requirements below:
1.
All UPS systems must be of the same rating and be connected to the same bypass
source.
2.
The outputs of all the UPS systems must be connected to a common output bus.
3.
The length and specification of power cables including the bypass input cables and the
UPS output cables should be the same. This facilitates load sharing when operating in
bypass mode.
Summary of Contents for L20-IB60, L20-IB00
Page 2: ......
Page 17: ...9 L20 L30 Figure 5 Install covers...
Page 27: ...19 L20 L30 5 5 Cabinet view Figure 15 Front view Side view of L20 and L30...
Page 31: ...23 L20 L30 5 7 Electrical Diagrams Figure 19 Remote EPO NO and NC port...
Page 32: ...24 L20 L30 Figure 20 External maintenance bypass auxiliary contacts...
