Overview Of 3Va1 As Switch Disconnectors; Upstream Protection Of Switch Disconnectors - Siemens 3VA1 100 A Manual

Applications
3.2 Use of the 3VA1 breaker as a switch disconnector
3.2.1

Overview of 3VA1 as switch disconnectors

3.2.2

Upstream protection of switch disconnectors

Switch disconnectors are not equipped with an integral overload or short-circuit release. For
this reason, a molded case circuit breaker or a fuse must be installed upstream of every
switch disconnector.
The coordination tables given below contain the following information:
● The correct assignment of molded case circuit breakers to the switch disconnectors which
require protection
● The maximum permissible rms short-circuit current kA rms for each combination of
molded case circuit breaker and switch disconnector
130
3VA molded case circuit breakers
Manual, 04/2015, A5E03603177010-02