Application planning
4.1 Types of installation and installation locations
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
139
Note
To integrate the circuit breaker optimally into the control panel, the 4-pole circuit breaker can
optionally be ordered with the neutral pole on the right or left-hand side of the circuit breaker.
These are basic versions of the circuit breaker and are permanently defined in the circuit
breaker. In all these versions, the circuit breaker is capable of full performance (no derating,
full current carrying capacity, and protection settings).
Phase sequence neutral left: N - L1 - L2 - L3
Phase sequence neutral right: L1 - L2 - L3 - N
The phase sequence L1, L2, L3 can be subsequently changed (to L3, L2, L1) by the user in
the electronic trip units of the 6-series to match any system configuration.
Mounting options
In addition to floor mounting, both the fixed-mounted breaker and the withdrawable breaker
permit direct rear wall mounting.
For floor mounting of the fixed-mounted breaker version, mounting supports are required
(see Section Support for floor fixation (fixed breaker) (Page 130)).
Connection versions - overview
Numerous connection versions are available (see also Section Accessories for connection
and insulation (Page 93)). All versions can be used both for floor mounting and for rear wall
mounting:
●
Front terminals:
–
For fixed-mounted breakers: directly or with extended terminal elements, as in the
case of the molded case circuit breakers. This saves work and costs.
–
For withdrawable breakers: with extended terminal elements accessible from the front
●
Rear connection:
–
For fixed-mounted breakers and withdrawable breakers: Horizontal or vertical
orientation
●
Cable connection for copper/aluminum cable:
–
For fixed-mounted breakers: on the front directly with cable clamps
–
For withdrawable breakers: on the rear with cable lug
