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Symmetra MW 800 kW 3 × 400/230 V Installation - 990-1510D 31
Required Breaker Settings (400 V Systems)
The Symmetra® MW is a fault-tolerant system capable of handling and surviving overloads and
internal/external faults. The overload performances and fault clearings are possible when the system
meets specified minimum requirements for breaker settings. The settings are specified in the tables
below, but some of them can also be found in the Electrical Specification section. The settings are all
minimum settings and may not result in a drop-out.
Input and upstream breakers — minimum settings
Output and downstream breakers -— minimum settings
Note
Contact APC Application Team for Required Breaker Settings in 380 V and 415 V
systems.
See also
See separate guide on parallel operation for information on required breaker settings in
parallel systems.
Q1, Q5, and any upstream breaker
Duration [S] Current [A] Total load [%] Event/Operation
< 0.005 22 kA -- Internal fault clearing
1466* 127 Overload on-line
1195 100 On-line
1315 110 On-line+ Max. Battery
charge
* Only applicable to Q1
∞
∞
∞
Q2, Q4, Q6, and any downstream breaker
Duration [S] Current [A] Total load [%] Event/Operation
< 0.005 22 kA -- Internal fault clearing.
60 2406* 200 Overload on-line
600 1504* 125 Overload on-line
1155 100 On-line
* Only applciable to Q2 and Q4
∞