APC Symmetra MW Installation Guide download pdf (Page 37)

Symmetra MW 800 kW 3 × 400/230 V Installation Guide - 990-1510B 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

600 1466* 127 Overload on-line

1203 100 On-line

1270 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.

Will end as upstream

60 2406* 200 Overload on-line

600 1504* 125 Overload on-line

1155 100 On-line

* Only applciable to Q2 and Q4

∞

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APC Symmetra MW Installation Guide Page 37