Application Overview - Siemens SENTRON 3VL System Manual

Product description

3.2 Application overview

3.2 Application overview
The following overview shows the most frequently occurring applications
Application overview
Application
3- and 4-pole circuit breakers
3-pole circuit breaker
3-pole circuit breaker
3- and 4-pole circuit breakers
18
Type Description
VL160X Line protection
The trip units for line protection are designed to protect cables and non-
VL160
motorized loads against overload and short-circuit.
VL250
VL400
VL630
VL800
VL125
VL1600
VL160 Motor/generator protection
The overload and short-circuit releases are designed for optimum
VL250
protection and direct-online starting of AC squirrel-cage motors. The
VL400
circuit breakers for motor protection have phase-failure sensitivity and a
VL630
thermal memory that protects the motor against overheating. The
adjustable time lag class enables users to adjust the overload release
to the startup conditions of the motor to be protected.
VL160 Starter combination
Starter combinations consist of: Circuit breaker + contactor + overload
VL250
relay. The circuit breaker handles short-circuit protection and the
VL400
isolating function. The contactor has the task of switching the load
VL630
feeder normally. The overload relay handles overload protection that
can be specially matched to the motor. The circuit breaker for starter
combination is therefore equipped with an adjustable and non-delayed
short-circuit release.
VL160X Non-automatic air circuit breakers
These circuit breakers are used as incoming circuit breakers, main
VL160
switches or isolating switches without overload protection. They have
VL250
fixed short-circuit releases so that back-up fuses are not necessary.
VL400
VL630
VL800
VL1250
VL1600
3VL molded-case circuit breakers
System Manual, 03/2009, 110 0110 - 02 DS 01