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Installation Guide APC Silcon 240-320kW 480V UPS 19
Working Principle of Dual Utility (2 utility supplies)
Working Principle of Single Utility (1 utility supply)
NOTICE!
Max. phase shift between utility 1 and 2: less than
±
3.
Refer to section 7.0 System Specifications for frequency tolerance of utility 1 and 2, and voltage.
Utility 1 supports the load in normal operation. Utility 2 supports the load through the static and
service bypass switch.
NOTICE!
Refer to section 7.0 System Specifications for frequency and voltage tolerance of utility 1.
Utility 1 or 2 supports the load in normal operation or through the static service bypass switch.
Q10
Q1
Q2
Q3
Utility 2
Output
Utility 1
Utility 1
Utility 2
APC Silcon UPS
Q1
Q2
Q3
Output
APC Silcon UPS
Utility 1/2
Utility 1/2