Applications
3.1 Line protection applications of 3VA molded case circuit breakers
3VA molded case circuit breakers
106 Manual, 04/2015, A5E03603177010-02
Suitable 3VA molded case circuit breakers and trip units
3VA molded case circuit breakers equipped with the following trip units are suitable for use in
line protection applications:
● 3VA1 breakers with thermal-magnetic trip units
– TM 2-series (Page 106)
● 3VA2 breakers with electronic trip units
– ETU 3-series (Page 110)
– ETU 5-series (Page 116)
– ETU 8-series (Page 116)
Thermal-magnetic trip units
Derating
Thermal-magnetic trip units employ a temperature-dependent bimetal to provide overload
protection. The setting values are calibrated at an ambient temperature of +50 °C.
Compensation factors must be applied for ambient temperatures other than +50 °C.
You will find more information and derating factors in chapter Derating and temperature
compensation (Page 489).
To Next Page
Loading...
Need help?
General
