Protection Functions - Siemens Sentron 3VA Manual

2.5

Protection functions

This chapter provides an overview of the protection system of 3VA UL molded case circuit
breakers.
The topics discussed in this chapter are listed below:
● Description of functions
● Overload protection (L)
● Short-time delayed short-circuit protection (S)
● Instantaneous short-circuit protection (I)
● Ground-fault protection (G)
● Neutral conductor protection (N)
● ZSI - Zone Selective Interlocking
● Guide to setting the tripping characteristic
3VA molded case circuit breakers with UL and IEC certification
Manual, 01/2019, L1V30435333-01
Description
2.5 Protection functions
63