Siemens Sentron 3VA User Manual

Applications
3.1 Use of the 3VA UL molded case circuit breakers in line protection
3VA molded case circuit breakers with UL and IEC certification
102 Manual, 01/2019, L1V30435333-01
3.1.2
Versions of the trip units
3.1.2.1
Thermal-magnetic trip units
TMTUs for line protection applications
Derating
Thermal-magnetic trip units employ a temperature-dependent bimetal to provide overload
protection. The setting values are calibrated at an ambient temperature of +40 °C.
Compensation factors must be applied for ambient temperatures greater than +50 °C.
You will find more information and derating factors in chapter Derating (Page 454).
Thermal-magnetic trip unit TM210 LI
Line protection FTFM - function LI
The thermal-magnetic trip unit TM210 has:
● Fixed parameter setting I
r
for overload protection (L)
● Fixed parameter setting I
i
for instantaneous short-circuit protection (I)

Siemens Sentron 3VA Specifications

General

Brand	Siemens
Model	Sentron 3VA
Category	Circuit breakers
Language	English