Product description
3.2 Application overview
3VL molded-case circuit breakers
18 System Manual, 03/2009, 110 0110 - 02 DS 01
3.2 Application overview
The following overview shows the most frequently occurring applications
Application overview
Application Type Description
3- and 4-pole circuit breakers
VL160X
VL160
VL250
VL400
VL630
VL800
VL125
VL1600
Line protection
The trip units for line protection are designed to protect cables and non-
motorized loads against overload and short-circuit.
3-pole circuit breaker
VL160
VL250
VL400
VL630
Motor/generator protection
The overload and short-circuit releases are designed for optimum
protection and direct-online starting of AC squirrel-cage motors. The
circuit breakers for motor protection have phase-failure sensitivity and a
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.
3-pole circuit breaker
VL160
VL250
VL400
VL630
Starter combination
Starter combinations consist of: Circuit breaker + contactor + overload
relay. The circuit breaker handles short-circuit protection and the
isolating function. The contactor has the task of switching the load
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.
3- and 4-pole circuit breakers
VL160X
VL160
VL250
VL400
VL630
VL800
VL1250
VL1600
Non-automatic air circuit breakers
These circuit breakers are used as incoming circuit breakers, main
switches or isolating switches without overload protection. They have
fixed short-circuit releases so that back-up fuses are not necessary.
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