Siemens 3VA1 100 A User Manual

Accessories
4.10 EFB300 external function box
3VA molded case circuit breakers
382 Manual, 04/2015, A5E03603177010-02
4.10.4
Zone-selective interlocking ZSI
Description
The microprocessor-controlled, zone-selective interlocking function ZSI has been developed
in order to control the total breaking time in low-voltage networks with multiple molded case
circuit breakers connected in series.
Advantage of ZSI:
Regardless of the number of series-connected molded case circuit breakers, all short circuits
in the network can be cleared within a maximum time period of 50 ms. Short-circuit
clearance times should be minimized, particularly in the case of system short circuits of very
large magnitude.
Note
Downward compatibility
The ZSI function is downward-compatible with the ZSI function of the 3VL and 3WL series of
molded case circuit breakers.

Siemens 3VA1 100 A Specifications

General

Brand	Siemens
Model	3VA1 100 A
Category	Power Tool
Language	English