American Power Conversion Symmetra MW - Manual (Page 39)

Symmetra MW 1000 kW 480 V Installation - 990-4112E 35
Required Breaker Settings
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
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 18 kA -- Internal fault clearing
1880* 130 Overload on-line
1245 100 On-line
1370 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 18 kA -- Internal fault clearing.
60 2406* 200 Overload on-line
600 1504* 125 Overload on-line
1203 100 On-line
* Only applicable to Q2 and Q4
∞