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TWO PARALLEL UNITS 1+1 Redundant Configuration with Dual Distribution Input
a1, a2:
Mains Supply MCCB 4p
d:
Distribution MCCB
b1, b2:
Auxiliary Supply MCCB 4p
o1, o2,
unit output switch 4p
NOTE :
Q3=
Internal Maintenance Bypass can be used when total load < single unit rating (kVA)
Option
o1, o2=
a, b, o
should be 4poles unless TN-C distribution is used
46
unit output disconnect switch to enable single unit complete shut down for maintenance
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